/**********************************************************************
 * $Id$
 *
 * Project:  MapServer
 * Purpose:  WFS server implementation
 * Author:   Daniel Morissette, DM Solutions Group (morissette@dmsolutions.ca)
 *
 **********************************************************************
 * Copyright (c) 2002, Daniel Morissette, DM Solutions Group Inc
 * Copyright (c) 2013, Even Rouault
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of this Software or works derived from this Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 ****************************************************************************/

#include "mapserver.h"
#include "mapows.h"

#include <string>

#if defined(USE_WFS_SVR)

/* There is a dependency to GDAL/OGR for the GML driver and MiniXML parser */
#include "cpl_minixml.h"
#include "cpl_conv.h"
#include "cpl_string.h"

#include "mapogcfilter.h"
#include "mapowscommon.h"
#include "maptemplate.h"

#if defined(USE_LIBXML2)
#include "maplibxml2.h"
#endif

#include <string>

static int msWFSAnalyzeStoredQuery(mapObj *map, wfsParamsObj *wfsparams,
                                   const char *id,
                                   const char *pszResolvedQuery);
static void msWFSSimplifyPropertyNameAndFilter(wfsParamsObj *wfsparams);
static void msWFSAnalyzeStartIndexAndFeatureCount(mapObj *map,
                                                  const wfsParamsObj *paramsObj,
                                                  int bIsHits,
                                                  int *pmaxfeatures,
                                                  int *pstartindex);
static int msWFSRunBasicGetFeature(mapObj *map, layerObj *lp,
                                   const wfsParamsObj *paramsObj,
                                   int nWFSVersion);

static int msWFSParseRequest(mapObj *map, cgiRequestObj *request,
                             wfsParamsObj *wfsparams, int force_wfs_mode);

/* Must be sorted from more recent to older one */
static const int wfsSupportedVersions[] = {OWS_2_0_0, OWS_1_1_0, OWS_1_0_0};
static const char *const wfsSupportedVersionsStr[] = {"2.0.0", "1.1.0",
                                                      "1.0.0"};
static const int wfsNumSupportedVersions =
    (int)(sizeof(wfsSupportedVersions) / sizeof(wfsSupportedVersions[0]));
static const char *const wfsUnsupportedOperations[] = {
    "GetFeatureWithLock", "LockFeature", "Transaction", "CreateStoredQuery",
    "DropStoredQuery"};
static const int wfsNumUnsupportedOperations =
    (int)(sizeof(wfsUnsupportedOperations) /
          sizeof(wfsUnsupportedOperations[0]));

#define WFS_LATEST_VERSION wfsSupportedVersionsStr[0]

/* Supported DescribeFeature formats */
typedef enum {
  OWS_DEFAULT_SCHEMA,  /* basically a GML 2.1 schema */
  OWS_SFE_SCHEMA,      /* GML for simple feature exchange (formerly GML3L0) */
  OWS_GML32_SFE_SCHEMA /* GML 3.2 Simple Features Level 0 */
} WFSSchemaVersion;

/*
** msWFSGetIndexUnsupportedOperation()
**
** Return index of pszOp in wfsUnsupportedOperations, or -1 otherwise
*/

static int msWFSGetIndexUnsupportedOperation(const char *pszOp) {
  int i;
  for (i = 0; i < wfsNumUnsupportedOperations; i++) {
    if (strcasecmp(wfsUnsupportedOperations[i], pszOp) == 0)
      return i;
  }
  return -1;
}

static const char *msWFSGetDefaultVersion(mapObj *map);

/*
** msWFSException()
**
** Report current MapServer error in XML exception format.
*/

static int msWFSExceptionInternal(mapObj *map, const char *locator,
                                  const char *code, const char *version,
                                  int locatorShouldBeNull) {
  char *schemalocation = NULL;
  /* In WFS, exceptions are always XML.
   */

  if (version == NULL)
    version = msWFSGetDefaultVersion(map);

  if (msOWSParseVersionString(version) >= OWS_2_0_0)
    return msWFSException20(map, (locatorShouldBeNull) ? NULL : locator, code);
  if (msOWSParseVersionString(version) >= OWS_1_1_0)
    return msWFSException11(map, (locatorShouldBeNull) ? NULL : locator, code,
                            version);

  msIO_setHeader("Content-Type", "text/xml; charset=UTF-8");
  msIO_sendHeaders();

  msIO_printf("<?xml version='1.0' encoding=\"UTF-8\" ?>\n");

  msIO_printf("<ServiceExceptionReport ");
  msIO_printf("version=\"1.2.0\" ");
  msIO_printf("xmlns=\"http://www.opengis.net/ogc\" ");
  msIO_printf("xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" ");
  schemalocation = msEncodeHTMLEntities(msOWSGetSchemasLocation(map));
  msIO_printf("xsi:schemaLocation=\"http://www.opengis.net/ogc "
              "%s/wfs/1.0.0/OGC-exception.xsd\">\n",
              schemalocation);
  free(schemalocation);
  msIO_printf("  <ServiceException code=\"%s\" locator=\"%s\">\n", code,
              locator);
  /* Optional <Locator> element currently unused. */
  /* msIO_printf("    <Message>\n"); */
  msWriteErrorXML(stdout);
  /* msIO_printf("    </Message>\n"); */
  msIO_printf("  </ServiceException>\n");
  msIO_printf("</ServiceExceptionReport>\n");

  return MS_FAILURE; /* so we can call 'return msWFSException();' anywhere */
}

int msWFSException(mapObj *map, const char *locator, const char *code,
                   const char *version) {
  return msWFSExceptionInternal(map, locator, code, version, FALSE);
}

/*
** msWFSExceptionNoLocator()
**
** Report current MapServer error in XML exception format.
** For WFS >= 1.1.0, the locator will be ignored. It will be just used
** for legacy WFS 1.0 exceptions.
*/

static int msWFSExceptionNoLocator(mapObj *map, const char *locator,
                                   const char *code, const char *version) {
  return msWFSExceptionInternal(map, locator, code, version, TRUE);
}

/*
** Helper function to build a list of output formats.
**
** Given a layer it will return all formats valid for that layer, otherwise
** all formats permitted on layers in the map are returned.  The string
** returned should be freed by the caller.
*/

char *msWFSGetOutputFormatList(mapObj *map, layerObj *layer, int nWFSVersion) {
  int i, got_map_list = 0;
  static const int out_list_size = 20000;
  char *out_list = (char *)msSmallCalloc(1, out_list_size);

  if (nWFSVersion == OWS_1_0_0)
    strcpy(out_list, "GML2");
  else if (nWFSVersion == OWS_1_1_0)
    strcpy(out_list, "text/xml; subtype=gml/3.1.1");
  else
    strcpy(out_list, "application/gml+xml; version=3.2,"
                     "text/xml; subtype=gml/3.2.1,"
                     "text/xml; subtype=gml/3.1.1,"
                     "text/xml; subtype=gml/2.1.2");

  for (i = 0; i < map->numlayers; i++) {
    const char *format_list;
    layerObj *lp;
    int j, n;
    char **tokens;

    lp = GET_LAYER(map, i);
    if (layer != NULL && layer != lp)
      continue;

    format_list =
        msOWSLookupMetadata(&(lp->metadata), "F", "getfeature_formatlist");

    if (format_list == NULL && !got_map_list) {
      format_list = msOWSLookupMetadata(&(map->web.metadata), "F",
                                        "getfeature_formatlist");
      got_map_list = 1;
    }

    if (format_list == NULL)
      continue;

    n = 0;
    tokens = msStringSplit(format_list, ',', &n);

    for (j = 0; j < n; j++) {
      int iformat;
      const char *fname, *hit;
      outputFormatObj *format_obj;

      msStringTrim(tokens[j]);
      iformat = msGetOutputFormatIndex(map, tokens[j]);
      if (iformat < 0)
        continue;

      format_obj = map->outputformatlist[iformat];

      fname = format_obj->name;
      if (nWFSVersion >= OWS_1_1_0 && format_obj->mimetype != NULL)
        fname = format_obj->mimetype;

      hit = strstr(out_list, fname);
      if (hit != NULL &&
          (hit[strlen(fname)] == '\0' || hit[strlen(fname)] == ','))
        continue;

      if (strlen(out_list) + strlen(fname) + 3 < out_list_size) {
        strcat(out_list, ",");
        strcat(out_list, fname);
      } else
        break;
    }

    msFreeCharArray(tokens, n);
  }

  return out_list;
}

/*
**
*/
static void msWFSPrintRequestCap(const char *request, const char *script_url,
                                 const char *format_tag,
                                 const char *formats_list) {
  msIO_printf("    <%s>\n", request);

  /* We expect to receive a NULL-terminated args list of formats */
  if (format_tag != NULL) {
    int i, n;
    char **tokens;

    n = 0;
    tokens = msStringSplit(formats_list, ',', &n);

    msIO_printf("      <%s>\n", format_tag);

    for (i = 0; i < n; i++) {
      msIO_printf("        <%s/>\n", tokens[i]);
    }

    msFreeCharArray(tokens, n);

    msIO_printf("      </%s>\n", format_tag);
  }

  msIO_printf("      <DCPType>\n");
  msIO_printf("        <HTTP>\n");
  msIO_printf("          <Get onlineResource=\"%s\" />\n", script_url);
  msIO_printf("        </HTTP>\n");
  msIO_printf("      </DCPType>\n");
  msIO_printf("      <DCPType>\n");
  msIO_printf("        <HTTP>\n");
  msIO_printf("          <Post onlineResource=\"%s\" />\n", script_url);
  msIO_printf("        </HTTP>\n");
  msIO_printf("      </DCPType>\n");

  msIO_printf("    </%s>\n", request);
}

/* msWFSLocateSRSInList()
**
** Utility function to check if a space separated list contains  the one passed
*in argument.
**  The list comes normally from ows_srs metadata, and is expected to use the
*simple EPSG notation
** (EPSG:4326 ESPG:42304 ...). The srs comes from the query string and can
*either
** be of simple EPSG format or using gc:def:crs:EPSG:xxx format
*/
int msWFSLocateSRSInList(const char *pszList, const char *srs) {
  int nTokens, i;
  char **tokens = NULL;
  int bFound = MS_FALSE;
  char epsg_string[100];
  const char *code;

  if (!pszList || !srs)
    return MS_FALSE;

  if (strncasecmp(srs, "EPSG:", 5) == 0)
    code = srs + 5;
  else if (strncasecmp(srs, "urn:ogc:def:crs:EPSG:", 21) == 0) {
    if (srs[21] == ':')
      code = srs + 21;
    else
      code = srs + 20;

    while (*code != ':' && *code != '\0')
      code++;
    if (*code == ':')
      code++;
  } else if (strncasecmp(srs, "urn:EPSG:geographicCRS:", 23) == 0)
    code = srs + 23;
  else
    return MS_FALSE;

  snprintf(epsg_string, sizeof(epsg_string), "EPSG:%s", code);

  tokens = msStringSplit(pszList, ' ', &nTokens);
  if (tokens && nTokens > 0) {
    for (i = 0; i < nTokens; i++) {
      if (strcasecmp(tokens[i], epsg_string) == 0) {
        bFound = MS_TRUE;
        break;
      }
    }
  }
  msFreeCharArray(tokens, nTokens);

  return bFound;
}

/* msWFSGetFeatureApplySRS()
**
** Utility function called from msWFSGetFeature. It is assumed that at this
*point
** all queried layers are turned ON
*/
static int msWFSGetFeatureApplySRS(mapObj *map, const char *srs,
                                   int nWFSVersion) {
  char *pszMapSRS = NULL;
  char *pszOutputSRS = NULL;
  layerObj *lp;
  int i;

  /*validation of SRS
    - wfs 1.0 does not have an srsname parameter so all queried layers should be
    advertized using the same srs. For wfs 1.1.0 an srsName can be passed, we
    should validate that It is valid for all queries layers
  */

  /* Start by applying the default service SRS to the mapObj,
   * make sure we reproject the map extent if a projection was
   * already set
   */
  msOWSGetEPSGProj(&(map->projection), &(map->web.metadata), "FO", MS_TRUE,
                   &pszMapSRS);
  if (pszMapSRS && nWFSVersion > OWS_1_0_0) {
    projectionObj proj;
    msInitProjection(&proj);
    msProjectionInheritContextFrom(&proj, &(map->projection));
    if (map->projection.numargs > 0 &&
        msLoadProjectionStringEPSG(&proj, pszMapSRS) == 0) {
      msProjectRect(&(map->projection), &proj, &map->extent);
    }
    msLoadProjectionStringEPSG(&(map->projection), pszMapSRS);
    msFreeProjection(&proj);
  }

  if (srs == NULL || nWFSVersion == OWS_1_0_0) {
    for (i = 0; i < map->numlayers; i++) {
      char *pszLayerSRS;
      lp = GET_LAYER(map, i);
      if (lp->status != MS_ON)
        continue;

      if (pszMapSRS)
        pszLayerSRS = pszMapSRS;
      else
        msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "FO", MS_TRUE,
                         &pszLayerSRS);

      if (pszLayerSRS == NULL) {
        msSetError(MS_WFSERR,
                   "Server config error: SRS must be set at least at the map "
                   "or at the layer level.",
                   "msWFSGetFeature()");
        if (pszOutputSRS)
          msFree(pszOutputSRS);
        /*pszMapSrs would also be NULL, no use freeing*/
        return MS_FAILURE;
      }
      if (pszOutputSRS == NULL)
        pszOutputSRS = msStrdup(pszLayerSRS);
      else if (strcasecmp(pszLayerSRS, pszOutputSRS) != 0) {
        msSetError(
            MS_WFSERR,
            "Invalid GetFeature Request: All TYPENAMES in a single GetFeature "
            "request must have been advertized in the same SRS.  Please check "
            "the capabilities and reformulate your request.",
            "msWFSGetFeature()");
        if (pszOutputSRS)
          msFree(pszOutputSRS);
        if (pszLayerSRS != pszMapSRS)
          msFree(pszLayerSRS);
        msFree(pszMapSRS);
        return MS_FAILURE;
      }
      if (pszLayerSRS != pszMapSRS)
        msFree(pszLayerSRS);
    }
  } else { /*srs is given so it should be valid for all layers*/
    /*get all the srs defined at the map level and check them against the
      srsName passed as argument*/
    msFree(pszMapSRS);
    msOWSGetEPSGProj(&(map->projection), &(map->web.metadata), "FO", MS_FALSE,
                     &pszMapSRS);
    if (pszMapSRS) {
      if (!msWFSLocateSRSInList(pszMapSRS, srs)) {
        msSetError(MS_WFSERR,
                   "Invalid GetFeature Request:Invalid SRS.  Please check the "
                   "capabilities and reformulate your request.",
                   "msWFSGetFeature()");
        msFree(pszMapSRS);
        return MS_FAILURE;
      }
      pszOutputSRS = msStrdup(srs);
    } else {
      for (i = 0; i < map->numlayers; i++) {
        char *pszLayerSRS = NULL;
        lp = GET_LAYER(map, i);
        if (lp->status != MS_ON)
          continue;

        msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "FO", MS_FALSE,
                         &pszLayerSRS);
        if (!pszLayerSRS) {
          msSetError(MS_WFSERR,
                     "Server config error: SRS must be set at least at the map "
                     "or at the layer level.",
                     "msWFSGetFeature()");
          msFree(pszMapSRS);
          return MS_FAILURE;
        }
        if (!msWFSLocateSRSInList(pszLayerSRS, srs)) {
          msSetError(MS_WFSERR,
                     "Invalid GetFeature Request:Invalid SRS.  Please check "
                     "the capabilities and reformulate your request.",
                     "msWFSGetFeature()");
          msFree(pszMapSRS);
          msFree(pszLayerSRS);
          return MS_FAILURE;
        }
        msFree(pszLayerSRS);
      }
      pszOutputSRS = msStrdup(srs);
    }
  }

  if (pszOutputSRS) {
    projectionObj sProjTmp;
    int nTmp = 0;

    msInitProjection(&sProjTmp);
    msProjectionInheritContextFrom(&sProjTmp, &(map->projection));
    if (nWFSVersion >= OWS_1_1_0) {
      nTmp = msLoadProjectionStringEPSG(&(sProjTmp), pszOutputSRS);
    } else {
      nTmp = msLoadProjectionString(&(sProjTmp), pszOutputSRS);
    }
    if (nTmp == 0) {
      msProjectRect(&(map->projection), &(sProjTmp), &map->extent);
    }
    msFreeProjection(&(sProjTmp));

    if (nTmp != 0) {
      msSetError(MS_WFSERR, "msLoadProjectionString() failed",
                 "msWFSGetFeature()");
      return MS_FAILURE;
    }

    /*we load the projection sting in the map and possibly
    set the axis order*/
    if (nWFSVersion >= OWS_1_1_0) {
      msLoadProjectionStringEPSG(&(map->projection), pszOutputSRS);
    } else {
      msLoadProjectionString(&(map->projection), pszOutputSRS);
    }

    nTmp = GetMapserverUnitUsingProj(&(map->projection));
    if (nTmp != -1) {
      map->units = static_cast<MS_UNITS>(nTmp);
    }
  }

  msFree(pszOutputSRS);
  msFree(pszMapSRS);
  return MS_SUCCESS;
}

static int msWFSIsLayerAllowed(layerObj *lp, owsRequestObj *ows_request) {
  return msIsLayerSupportedForWFSOrOAPIF(lp) &&
         (msIntegerInArray(lp->index, ows_request->enabled_layers,
                           ows_request->numlayers));
}

static layerObj *msWFSGetLayerByName(mapObj *map, owsRequestObj *ows_request,
                                     const char *name) {
  int j;
  for (j = 0; j < map->numlayers; j++) {
    layerObj *lp;

    lp = GET_LAYER(map, j);

    if (msWFSIsLayerAllowed(lp, ows_request) && lp->name &&
        (strcasecmp(lp->name, name) == 0)) {
      return lp;
    }
  }
  return NULL;
}

/*
** msWFSDumpLayer()
*/
int msWFSDumpLayer(mapObj *map, layerObj *lp, const char *script_url_encoded) {
  rectObj ext;
  char *pszWfsSrs = NULL;
  projectionObj poWfs;

  msIO_printf("    <FeatureType>\n");

  if (lp->name && strlen(lp->name) > 0 &&
      (msIsXMLTagValid(lp->name) == MS_FALSE || isdigit(lp->name[0])))
    msIO_fprintf(stdout,
                 "<!-- WARNING: The layer name '%s' might contain spaces or "
                 "invalid characters or may start with a number. This could "
                 "lead to potential problems. -->\n",
                 lp->name);

  msOWSPrintEncodeParam(stdout, "LAYER.NAME", lp->name, OWS_WARN,
                        "        <Name>%s</Name>\n", NULL);

  msOWSPrintEncodeMetadata(stdout, &(lp->metadata), "FO", "title", OWS_WARN,
                           "        <Title>%s</Title>\n", lp->name);

  msOWSPrintEncodeMetadata(stdout, &(lp->metadata), "FO", "abstract", OWS_NOERR,
                           "        <Abstract>%s</Abstract>\n", NULL);

  msOWSPrintEncodeMetadataList(stdout, &(lp->metadata), "FO", "keywordlist",
                               "        <Keywords>\n", "        </Keywords>\n",
                               "          %s\n", NULL);

  /* In WFS, every layer must have exactly one SRS and there is none at */
  /* the top level contrary to WMS */
  /*  */
  /* So here is the way we'll deal with SRS: */
  /* 1- If a top-level map projection (or wfs_srs metadata) is set then */
  /* all layers are advertized in the map's projection and they will */
  /* be reprojected on the fly in the GetFeature request. */
  /* 2- If there is no top-level map projection (or wfs_srs metadata) then */
  /* each layer is advertized in its own projection as defined in the */
  /* layer's projection object or wfs_srs metadata. */
  /*  */

  /* if Map has a SRS,  Use it for all layers. */
  msOWSGetEPSGProj(&(map->projection), &(map->web.metadata), "FO", MS_TRUE,
                   &pszWfsSrs);
  if (!pszWfsSrs) {
    /* Map has no SRS.  Use layer SRS or produce a warning. */
    msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "FO", MS_TRUE,
                     &pszWfsSrs);
  }

  msOWSPrintEncodeParam(
      stdout,
      "(at least one of) MAP.PROJECTION, LAYER.PROJECTION or wfs_srs metadata",
      pszWfsSrs, OWS_WARN, "        <SRS>%s</SRS>\n", NULL);

  /* If layer has no proj set then use map->proj for bounding box. */
  if (msOWSGetLayerExtent(map, lp, "FO", &ext) == MS_SUCCESS) {
    msInitProjection(&poWfs);
    msProjectionInheritContextFrom(&poWfs, &(map->projection));
    if (pszWfsSrs != NULL)
      msLoadProjectionString(&(poWfs), pszWfsSrs);

    if (lp->projection.numargs > 0) {
      msOWSPrintLatLonBoundingBox(stdout, "        ", &(ext), &(lp->projection),
                                  &(poWfs), OWS_WFS);
    } else {
      msOWSPrintLatLonBoundingBox(stdout, "        ", &(ext),
                                  &(map->projection), &(poWfs), OWS_WFS);
    }
    msFreeProjection(&poWfs);
  } else {
    msIO_printf("<!-- WARNING: Optional LatLongBoundingBox could not be "
                "established for this layer.  Consider setting the EXTENT in "
                "the LAYER object, or wfs_extent metadata. Also check that "
                "your data exists in the DATA statement -->\n");
  }

  const char *metadataurl_list =
      msOWSLookupMetadata(&(lp->metadata), "FO", "metadataurl_list");
  if (metadataurl_list) {
    int ntokens = 0;
    char **tokens = msStringSplit(metadataurl_list, ' ', &ntokens);
    for (int i = 0; i < ntokens; i++) {
      std::string key("metadataurl_");
      key += tokens[i];
      msOWSPrintURLType(stdout, &(lp->metadata), "FO", key.c_str(), OWS_WARN,
                        NULL, "MetadataURL", " type=\"%s\"", NULL, NULL,
                        " format=\"%s\"", "%s", MS_TRUE, MS_FALSE, MS_FALSE,
                        MS_TRUE, MS_TRUE, NULL, NULL, NULL, NULL, NULL,
                        "        ");
    }
    msFreeCharArray(tokens, ntokens);
  } else {
    if (!msOWSLookupMetadata(&(lp->metadata), "FO", "metadataurl_href"))
      msMetadataSetGetMetadataURL(lp, script_url_encoded);

    msOWSPrintURLType(stdout, &(lp->metadata), "FO", "metadataurl", OWS_WARN,
                      NULL, "MetadataURL", " type=\"%s\"", NULL, NULL,
                      " format=\"%s\"", "%s", MS_TRUE, MS_FALSE, MS_FALSE,
                      MS_TRUE, MS_TRUE, NULL, NULL, NULL, NULL, NULL,
                      "        ");
  }

  if (msOWSLookupMetadata(&(lp->metadata), "OFG", "featureid") == NULL) {
    msIO_fprintf(
        stdout,
        "<!-- WARNING: Required Feature Id attribute (fid) not specified for "
        "this feature type. Make sure you set one of wfs_featureid, "
        "ows_featureid or gml_featureid metadata. -->\n");
  }

  msIO_printf("    </FeatureType>\n");

  msFree(pszWfsSrs);
  return MS_SUCCESS;
}

/*
** msWFSHandleUpdateSequence()
*/
int msWFSHandleUpdateSequence(mapObj *map, wfsParamsObj *params,
                              const char *pszFunction) {
  /* -------------------------------------------------------------------- */
  /*      Handle updatesequence                                           */
  /* -------------------------------------------------------------------- */

  const char *updatesequence =
      msOWSLookupMetadata(&(map->web.metadata), "FO", "updatesequence");

  if (params->pszUpdateSequence != NULL) {
    int i =
        msOWSNegotiateUpdateSequence(params->pszUpdateSequence, updatesequence);
    if (i == 0) { /* current */
      msSetError(MS_WFSERR,
                 "UPDATESEQUENCE parameter (%s) is equal to server (%s)",
                 pszFunction, params->pszUpdateSequence, updatesequence);
      /* FIXME? : according to table 7 of OWS 1.1, we should return a service */
      /* metadata document with only “version” and “updateSequence” parameters
       */
      return msWFSException(map, "updatesequence", "CurrentUpdateSequence",
                            params->pszVersion);
    }
    if (i > 0) { /* invalid */
      msSetError(MS_WFSERR,
                 "UPDATESEQUENCE parameter (%s) is higher than server (%s)",
                 pszFunction, params->pszUpdateSequence, updatesequence);
      /* locator must be NULL. See Table 25 of OWS 1.1 */
      return msWFSExceptionNoLocator(map, "updatesequence",
                                     MS_OWS_ERROR_INVALID_UPDATE_SEQUENCE,
                                     params->pszVersion);
    }
  }

  return MS_SUCCESS;
}

/*
** msWFSGetCapabilitiesNegotiateVersion()
*/
static int msWFSGetCapabilitiesNegotiateVersion(mapObj *map,
                                                wfsParamsObj *wfsparams) {
  int iVersion = -1;
  char tmpString[OWS_VERSION_MAXLEN];

  /* acceptversions: do OWS Common style of version negotiation */
  if (wfsparams->pszAcceptVersions &&
      strlen(wfsparams->pszAcceptVersions) > 0) {
    char **tokens;
    int i, j;

    tokens = msStringSplit(wfsparams->pszAcceptVersions, ',', &j);
    for (i = 0; i < j; i++) {
      iVersion = msOWSParseVersionString(tokens[i]);

      if (iVersion < 0) {
        msSetError(MS_WFSERR, "Invalid version format : %s.",
                   "msWFSGetCapabilities()", tokens[i]);
        msFreeCharArray(tokens, j);
        return msWFSException(map, "acceptversions",
                              MS_OWS_ERROR_INVALID_PARAMETER_VALUE, NULL);
      }

      /* negotiate version */
      iVersion = msOWSCommonNegotiateVersion(iVersion, wfsSupportedVersions,
                                             wfsNumSupportedVersions);
      if (iVersion != -1)
        break;
    }
    msFreeCharArray(tokens, j);
    if (iVersion == -1) {
      msSetError(MS_WFSERR,
                 "ACCEPTVERSIONS list (%s) does not match supported versions",
                 "msWFSGetCapabilities()", wfsparams->pszAcceptVersions);
      /* locator must be NULL. See Table 25 of OWS 1.1 */
      return msWFSExceptionNoLocator(
          map, "acceptversions", MS_OWS_ERROR_VERSION_NEGOTIATION_FAILED, NULL);
    }
  } else {
    /* negotiate version */
    int tmpInt;
    iVersion = msOWSParseVersionString(wfsparams->pszVersion);
    if (iVersion < 0) {
      return msWFSException(map, "version",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE, NULL);
    }
    tmpInt = msOWSCommonNegotiateVersion(iVersion, wfsSupportedVersions,
                                         wfsNumSupportedVersions);
    /* Old style negotiation : paragraph D.11 of OWS 1.1.0 spec */
    if (tmpInt < 0) {
      int i;
      for (i = 0; i < wfsNumSupportedVersions; i++) {
        if (iVersion >= wfsSupportedVersions[i]) {
          iVersion = wfsSupportedVersions[i];
          break;
        }
      }
      if (i == wfsNumSupportedVersions)
        iVersion = wfsSupportedVersions[wfsNumSupportedVersions - 1];
    }
  }

  /* set result as string and carry on */
  if (wfsparams->pszVersion)
    msFree(wfsparams->pszVersion);
  wfsparams->pszVersion = msStrdup(msOWSGetVersionString(iVersion, tmpString));

  return MS_SUCCESS;
}

/*
** msWFSGetCapabilities()
*/
int msWFSGetCapabilities(mapObj *map, wfsParamsObj *wfsparams,
                         cgiRequestObj *req, owsRequestObj *ows_request) {
  char *script_url = NULL, *script_url_encoded;
  const char *updatesequence = NULL;
  const char *wmtver = NULL;
  char *formats_list;
  int ret;
  int iVersion;
  int i = 0;

  ret = msWFSGetCapabilitiesNegotiateVersion(map, wfsparams);
  if (ret != MS_SUCCESS)
    return ret;

  iVersion = msOWSParseVersionString(wfsparams->pszVersion);
  if (iVersion == OWS_2_0_0)
    return msWFSGetCapabilities20(map, wfsparams, req, ows_request);
  if (iVersion == OWS_1_1_0)
    return msWFSGetCapabilities11(map, wfsparams, req, ows_request);

  /* Decide which version we're going to return... only 1.0.0 for now */
  wmtver = "1.0.0";

  /* We need this server's onlineresource. */
  if ((script_url = msOWSGetOnlineResource(map, "FO", "onlineresource", req)) ==
          NULL ||
      (script_url_encoded = msEncodeHTMLEntities(script_url)) == NULL) {
    msSetError(MS_WFSERR, "Server URL not found", "msWFSGetCapabilities()");
    return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                          wmtver);
  }
  free(script_url);
  script_url = NULL;

  ret = msWFSHandleUpdateSequence(map, wfsparams, "msWFSGetCapabilities()");
  if (ret != MS_SUCCESS) {
    free(script_url_encoded);
    return ret;
  }

  msIO_setHeader("Content-Type", "text/xml; charset=UTF-8");
  msIO_sendHeaders();

  msIO_printf("<?xml version='1.0' encoding=\"UTF-8\" ?>\n");

  updatesequence =
      msOWSLookupMetadata(&(map->web.metadata), "FO", "updatesequence");
  msIO_printf("<WFS_Capabilities \n"
              "   version=\"%s\" \n"
              "   updateSequence=\"%s\" \n"
              "   xmlns=\"http://www.opengis.net/wfs\" \n"
              "   xmlns:ogc=\"http://www.opengis.net/ogc\" \n"
              "   xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
              "   xsi:schemaLocation=\"http://www.opengis.net/wfs "
              "%s/wfs/%s/WFS-capabilities.xsd\">\n",
              wmtver, updatesequence ? updatesequence : "0",
              msOWSGetSchemasLocation(map), wmtver);

  /*
  ** SERVICE definition
  */
  msIO_printf("<Service>\n");
  msIO_printf("  <Name>MapServer WFS</Name>\n");

  /* the majority of this section is dependent on appropriately named metadata
   * in the WEB object */
  msOWSPrintEncodeMetadata(stdout, &(map->web.metadata), "FO", "title",
                           OWS_WARN, "  <Title>%s</Title>\n", map->name);
  msOWSPrintEncodeMetadata(stdout, &(map->web.metadata), "FO", "abstract",
                           OWS_NOERR, "  <Abstract>%s</Abstract>\n", NULL);

  msOWSPrintEncodeMetadataList(stdout, &(map->web.metadata), "FO",
                               "keywordlist", "  <Keywords>\n",
                               "  </Keywords>\n", "    %s\n", NULL);

  /* Service/onlineresource */
  /* Defaults to same as request onlineresource if wfs_service_onlineresource */
  /* is not set. */
  msOWSPrintEncodeMetadata(
      stdout, &(map->web.metadata), "FO", "service_onlineresource", OWS_NOERR,
      "  <OnlineResource>%s</OnlineResource>\n", script_url_encoded);

  msOWSPrintEncodeMetadata(stdout, &(map->web.metadata), "FO", "fees",
                           OWS_NOERR, "  <Fees>%s</Fees>\n", NULL);

  msOWSPrintEncodeMetadata(
      stdout, &(map->web.metadata), "FO", "accessconstraints", OWS_NOERR,
      "  <AccessConstraints>%s</AccessConstraints>\n", NULL);

  msIO_printf("</Service>\n\n");

  /*
  ** CAPABILITY definitions: list of supported requests
  */

  msIO_printf("<Capability>\n");

  msIO_printf("  <Request>\n");
  msWFSPrintRequestCap("GetCapabilities", script_url_encoded, NULL, NULL);
  /* msWFSPrintRequestCap("DescribeFeatureType", script_url_encoded,
   * "SchemaDescriptionLanguage", "XMLSCHEMA", "SFE_XMLSCHEMA", NULL); */
  /* msWFSPrintRequestCap("GetFeature", script_url_encoded, "ResultFormat",
   * "GML2", "GML3", NULL); */

  /* don't advertise the GML3 or GML for SFE support */
  if (msOWSRequestIsEnabled(map, NULL, "F", "DescribeFeatureType", MS_TRUE))
    msWFSPrintRequestCap("DescribeFeatureType", script_url_encoded,
                         "SchemaDescriptionLanguage", "XMLSCHEMA");

  if (msOWSRequestIsEnabled(map, NULL, "F", "GetFeature", MS_TRUE)) {
    formats_list = msWFSGetOutputFormatList(map, NULL, OWS_1_0_0);
    msWFSPrintRequestCap("GetFeature", script_url_encoded, "ResultFormat",
                         formats_list);
    msFree(formats_list);
  }

  msIO_printf("  </Request>\n");
  msIO_printf("</Capability>\n\n");

  /*
  ** FeatureTypeList: layers
  */

  msIO_printf("<FeatureTypeList>\n");

  /* Operations supported... set default at top-level, and more operations */
  /* can be added inside each layer... for MapServer only query is supported */
  msIO_printf("  <Operations>\n");
  msIO_printf("    <Query/>\n");
  msIO_printf("  </Operations>\n");

  for (i = 0; i < map->numlayers; i++) {
    layerObj *lp;
    lp = GET_LAYER(map, i);

    if (lp->status == MS_DELETE)
      continue;

    if (msWFSIsLayerAllowed(lp, ows_request)) {
      msWFSDumpLayer(map, lp, script_url_encoded);
    }
  }

  msIO_printf("</FeatureTypeList>\n\n");

  /*
  ** OGC Filter Capabilities ... for now we support only BBOX
  */

  msIO_printf("<ogc:Filter_Capabilities>\n");
  msIO_printf("  <ogc:Spatial_Capabilities>\n");
  msIO_printf("    <ogc:Spatial_Operators>\n");
#ifdef USE_GEOS
  msIO_printf("      <ogc:Equals/>\n");
  msIO_printf("      <ogc:Disjoint/>\n");
  msIO_printf("      <ogc:Touches/>\n");
  msIO_printf("      <ogc:Within/>\n");
  msIO_printf("      <ogc:Overlaps/>\n");
  msIO_printf("      <ogc:Crosses/>\n");
  msIO_printf("      <ogc:Intersect/>\n");
  msIO_printf("      <ogc:Contains/>\n");
  msIO_printf("      <ogc:DWithin/>\n");
#endif
  msIO_printf("      <ogc:BBOX/>\n");
  msIO_printf("    </ogc:Spatial_Operators>\n");
  msIO_printf("  </ogc:Spatial_Capabilities>\n");

  msIO_printf("  <ogc:Scalar_Capabilities>\n");
  msIO_printf("    <ogc:Logical_Operators />\n");
  msIO_printf("    <ogc:Comparison_Operators>\n");
  msIO_printf("      <ogc:Simple_Comparisons />\n");
  msIO_printf("      <ogc:Like />\n");
  msIO_printf("      <ogc:Between />\n");
  msIO_printf("    </ogc:Comparison_Operators>\n");
  msIO_printf("  </ogc:Scalar_Capabilities>\n");

  msIO_printf("</ogc:Filter_Capabilities>\n\n");

  /*
  ** Done!
  */
  msIO_printf("</WFS_Capabilities>\n");

  free(script_url_encoded);

  return MS_SUCCESS;
}

/*
** Helper functions for producing XML schema.
*/

static const char *msWFSGetGeometryType(const char *type,
                                        OWSGMLVersion outputformat) {
  if (!type)
    return "GeometryPropertyType";

  if (strcasecmp(type, "point") == 0) {
    switch (outputformat) {
    case OWS_GML2:
    case OWS_GML3:
    case OWS_GML32:
      return "PointPropertyType";
    }
  } else if (strcasecmp(type, "multipoint") == 0) {
    switch (outputformat) {
    case OWS_GML2:
    case OWS_GML3:
    case OWS_GML32:
      return "MultiPointPropertyType";
    }
  } else if (strcasecmp(type, "line") == 0) {
    switch (outputformat) {
    case OWS_GML2:
      return "LineStringPropertyType";
    case OWS_GML3:
    case OWS_GML32:
      return "CurvePropertyType";
    }
  } else if (strcasecmp(type, "multiline") == 0) {
    switch (outputformat) {
    case OWS_GML2:
      return "MultiLineStringPropertyType";
    case OWS_GML3:
    case OWS_GML32:
      return "MultiCurvePropertyType";
    }
  } else if (strcasecmp(type, "polygon") == 0) {
    switch (outputformat) {
    case OWS_GML2:
      return "PolygonPropertyType";
    case OWS_GML3:
    case OWS_GML32:
      return "SurfacePropertyType";
    }
  } else if (strcasecmp(type, "multipolygon") == 0) {
    switch (outputformat) {
    case OWS_GML2:
      return "MultiPolygonPropertyType";
    case OWS_GML3:
    case OWS_GML32:
      return "MultiSurfacePropertyType";
    }
  }

  return "???unknown???";
}

static void msWFSWriteGeometryElement(FILE *stream,
                                      gmlGeometryListObj *geometryList,
                                      OWSGMLVersion outputformat,
                                      const char *tab) {
  int i;
  gmlGeometryObj *geometry = NULL;

  if (!stream || !tab)
    return;
  if (geometryList->numgeometries == 1 &&
      strcasecmp(geometryList->geometries[0].name, "none") == 0)
    return;

  if (geometryList->numgeometries == 1) {
    geometry = &(geometryList->geometries[0]);
    msIO_fprintf(
        stream, "%s<element name=\"%s\" type=\"gml:%s\" minOccurs=\"%d\"", tab,
        geometry->name, msWFSGetGeometryType(geometry->type, outputformat),
        geometry->occurmin);
    if (geometry->occurmax == OWS_GML_OCCUR_UNBOUNDED)
      msIO_fprintf(stream, " maxOccurs=\"unbounded\"/>\n");
    else
      msIO_fprintf(stream, " maxOccurs=\"%d\"/>\n", geometry->occurmax);
  } else {
    msIO_fprintf(stream, "%s<choice>\n", tab);
    for (i = 0; i < geometryList->numgeometries; i++) {
      geometry = &(geometryList->geometries[i]);

      msIO_fprintf(stream,
                   "  %s<element name=\"%s\" type=\"gml:%s\" minOccurs=\"%d\"",
                   tab, geometry->name,
                   msWFSGetGeometryType(geometry->type, outputformat),
                   geometry->occurmin);
      if (geometry->occurmax == OWS_GML_OCCUR_UNBOUNDED)
        msIO_fprintf(stream, " maxOccurs=\"unbounded\"/>\n");
      else
        msIO_fprintf(stream, " maxOccurs=\"%d\"/>\n", geometry->occurmax);
    }
    msIO_fprintf(stream, "%s</choice>\n", tab);
  }

  return;
}

static OWSGMLVersion
msWFSGetGMLVersionFromSchemaVersion(WFSSchemaVersion outputformat) {
  switch (outputformat) {
  case OWS_DEFAULT_SCHEMA:
    return OWS_GML2;
  case OWS_SFE_SCHEMA:
    return OWS_GML3;
  case OWS_GML32_SFE_SCHEMA:
    return OWS_GML32;
  }
  return OWS_GML2;
}

static void msWFSSchemaWriteGeometryElement(FILE *stream,
                                            gmlGeometryListObj *geometryList,
                                            WFSSchemaVersion outputformat,
                                            const char *tab) {
  OWSGMLVersion gmlversion = msWFSGetGMLVersionFromSchemaVersion(outputformat);
  msWFSWriteGeometryElement(stream, geometryList, gmlversion, tab);
}

static const char *msWFSMapServTypeToXMLType(const char *type) {
  const char *element_type = "string";
  /* Map from MapServer types to XSD types */
  if (strcasecmp(type, "Integer") == 0)
    element_type = "integer";
  /* Note : xs:int and xs:integer differ */
  else if (EQUAL(type, "int"))
    element_type = "int";
  if (strcasecmp(type, "Long") == 0) /* 64bit integer */
    element_type = "long";
  else if (
      EQUAL(type, "Real") ||
      EQUAL(type,
            "double") /* just in case someone provided the xsd type directly */)
    element_type = "double";
  else if (EQUAL(type, "Character"))
    element_type = "string";
  else if (EQUAL(type, "Date"))
    element_type = "date";
  else if (EQUAL(type, "Time"))
    element_type = "time";
  else if (EQUAL(type, "DateTime"))
    element_type = "dateTime";
  else if (EQUAL(type, "Boolean"))
    element_type = "boolean";
  return element_type;
}

static void msWFSWriteItemElement(FILE *stream, gmlItemObj *item,
                                  const char *tab,
                                  WFSSchemaVersion outputformat,
                                  int is_nillable) {
  const char *element_name;
  const char *element_type = "string";
  const char *pszMinOccurs = "";
  const char *pszNillable = "";

  if (!stream || !item || !tab)
    return;
  if (!item->visible)
    return; /* not exposing this attribute */
  if (item->_template)
    return; /* can't adequately deal with templated items yet */

  if (item->alias) /* TODO: what about name spaces embedded in the alias? */
    element_name = item->alias;
  else
    element_name = item->name;

  if (item->type) {
    if (outputformat == OWS_GML32_SFE_SCHEMA &&
        (EQUAL(item->type, "Date") || EQUAL(item->type, "Time") ||
         EQUAL(item->type, "DateTime")))
      element_type = "gml:TimeInstantType";
    else
      element_type = msWFSMapServTypeToXMLType(item->type);
  }

  if (item->minOccurs == 0)
    pszMinOccurs = " minOccurs=\"0\"";

  if (is_nillable)
    pszNillable = " nillable=\"true\"";

  msIO_fprintf(stream, "%s<element name=\"%s\"%s%s type=\"%s\"/>\n", tab,
               element_name, pszMinOccurs, pszNillable, element_type);

  return;
}

static void msWFSWriteConstantElement(FILE *stream, gmlConstantObj *constant,
                                      const char *tab) {
  const char *element_type = "string";

  if (!stream || !constant || !tab)
    return;

  if (constant->type)
    element_type = msWFSMapServTypeToXMLType(constant->type);

  msIO_fprintf(stream, "%s<element name=\"%s\" type=\"%s\"/>\n", tab,
               constant->name, element_type);

  return;
}

static void msWFSWriteGroupElement(FILE *stream, gmlGroupObj *group,
                                   const char *tab, const char *_namespace) {
  if (group->type)
    msIO_fprintf(stream, "%s<element name=\"%s\" type=\"%s:%s\"/>\n", tab,
                 group->name, _namespace, group->type);
  else
    msIO_fprintf(stream, "%s<element name=\"%s\" type=\"%s:%sType\"/>\n", tab,
                 group->name, _namespace, group->name);

  return;
}

static void msWFSWriteGroupElementType(FILE *stream, gmlGroupObj *group,
                                       gmlItemListObj *itemList,
                                       gmlConstantListObj *constantList,
                                       const char *tab,
                                       WFSSchemaVersion outputformat) {
  int i, j;

  gmlItemObj *item = NULL;
  gmlConstantObj *constant = NULL;

  /* setup the element tab */
  std::string element_tab(tab);
  element_tab += "    ";

  if (group->type)
    msIO_fprintf(stream, "%s<complexType name=\"%s\">\n", tab, group->type);
  else
    msIO_fprintf(stream, "%s<complexType name=\"%sType\">\n", tab, group->name);

  msIO_fprintf(stream, "%s  <sequence>\n", tab);

  /* now the items/constants (e.g. elements) in the group */
  for (i = 0; i < group->numitems; i++) {
    for (j = 0; j < constantList->numconstants;
         j++) { /* find the right gmlConstantObj */
      constant = &(constantList->constants[j]);
      if (strcasecmp(constant->name, group->items[i]) == 0) {
        msWFSWriteConstantElement(stream, constant, element_tab.c_str());
        break;
      }
    }
    if (j != constantList->numconstants)
      continue;                                /* found this item */
    for (j = 0; j < itemList->numitems; j++) { /* find the right gmlItemObj */
      item = &(itemList->items[j]);
      if (strcasecmp(item->name, group->items[i]) == 0) {
        msWFSWriteItemElement(stream, item, element_tab.c_str(), outputformat,
                              MS_FALSE);
        break;
      }
    }
  }

  msIO_fprintf(stream, "%s  </sequence>\n", tab);
  msIO_fprintf(stream, "%s</complexType>\n", tab);

  return;
}

static const char *msWFSGetGMLSchemaLocation(OWSGMLVersion outputformat) {
  switch (outputformat) {
  case OWS_GML2:
    return MS_OWSCOMMON_GML_212_SCHEMA_LOCATION;
  case OWS_GML3:
    return MS_OWSCOMMON_GML_311_SCHEMA_LOCATION;
  case OWS_GML32:
    return MS_OWSCOMMON_GML_321_SCHEMA_LOCATION;
  }
  return "/unknown.xsd";
}

static const char *msWFSGetGMLNamespaceURI(WFSSchemaVersion outputformat) {
  switch (outputformat) {
  case OWS_DEFAULT_SCHEMA:
    return MS_OWSCOMMON_GML_NAMESPACE_URI;
  case OWS_SFE_SCHEMA:
    return MS_OWSCOMMON_GML_NAMESPACE_URI;
  case OWS_GML32_SFE_SCHEMA:
    return MS_OWSCOMMON_GML_32_NAMESPACE_URI;
  }
  return "http://unknown";
}

static const char *
msWFSGetGMLNamespaceURIFromGMLVersion(OWSGMLVersion outputformat) {
  switch (outputformat) {
  case OWS_GML2:
    return MS_OWSCOMMON_GML_NAMESPACE_URI;
  case OWS_GML3:
    return MS_OWSCOMMON_GML_NAMESPACE_URI;
  case OWS_GML32:
    return MS_OWSCOMMON_GML_32_NAMESPACE_URI;
  }
  return "http://unknown";
}

static void msWFS_NS_printf(const char *prefix, const char *uri) {
  if (prefix == NULL)
    msIO_printf("   xmlns=\"%s\"\n", uri);
  else
    msIO_printf("   xmlns:%s=\"%s\"\n", prefix, uri);
}

static void
msWFSPrintAdditionalNamespaces(const gmlNamespaceListObj *namespaceList) {
  int i;
  /* any additional namespaces */
  for (i = 0; i < namespaceList->numnamespaces; i++) {
    if (namespaceList->namespaces[i].uri) {
      char *uri_encoded = NULL;

      uri_encoded = msEncodeHTMLEntities(namespaceList->namespaces[i].uri);
      msWFS_NS_printf(namespaceList->namespaces[i].prefix, uri_encoded);
      msFree(uri_encoded);
    }
  }
}

static const char *msWFSStripNS(const char *name) {
  const char *pszColon = strchr(name, ':');
  const char *pszSlash = strchr(name, '/');
  if (pszColon && (pszSlash == NULL || pszColon < pszSlash))
    return pszColon + 1;
  return name;
}

/*
** msWFSDescribeFeatureType()
*/
static int msWFSDescribeFeatureType(mapObj *map, wfsParamsObj *paramsObj,
                                    owsRequestObj *ows_request,
                                    int nWFSVersion) {
  int i, numlayers = 0;
  char **layers = NULL;

  const char *value;
  const char *user_namespace_prefix = MS_DEFAULT_NAMESPACE_PREFIX;
  const char *user_namespace_uri = MS_DEFAULT_NAMESPACE_URI;
  char *user_namespace_uri_encoded = NULL;
  const char *collection_name = OWS_WFS_FEATURE_COLLECTION_NAME;
  char *encoded;

  WFSSchemaVersion outputformat =
      OWS_DEFAULT_SCHEMA; /* default output is GML 2.1 compliant schema*/

  gmlNamespaceListObj *namespaceList =
      NULL; /* for external application schema support */
  char *mimetype = NULL;

  if (paramsObj->pszTypeName && numlayers == 0) {
    /* Parse comma-delimited list of type names (layers) */
    layers = msStringSplit(paramsObj->pszTypeName, ',', &numlayers);
    if (numlayers > 0) {
      /* strip namespace if there is one :ex TYPENAME=cdf:Other */
      for (i = 0; i < numlayers; i++) {
        char *pszTmp = msStrdup(msWFSStripNS(layers[i]));
        free(layers[i]);
        layers[i] = pszTmp;
      }
    }
  }

  if (paramsObj->pszOutputFormat) {
    if (strcasecmp(paramsObj->pszOutputFormat, "XMLSCHEMA") == 0 ||
        strstr(paramsObj->pszOutputFormat, "gml/2") != NULL) {
      mimetype = msEncodeHTMLEntities("text/xml; subtype=gml/2.1.2");
      outputformat = OWS_DEFAULT_SCHEMA;
    } else if (strcasecmp(paramsObj->pszOutputFormat, "SFE_XMLSCHEMA") == 0 ||
               strstr(paramsObj->pszOutputFormat, "gml/3.1") != NULL) {
      mimetype = msEncodeHTMLEntities("text/xml; subtype=gml/3.1.1");
      outputformat = OWS_SFE_SCHEMA;
    } else if (strstr(paramsObj->pszOutputFormat, "gml/3.2") != NULL ||
               strstr(paramsObj->pszOutputFormat,
                      "application/gml+xml; version=3.2") != NULL) {
      mimetype = msEncodeHTMLEntities("application/gml+xml; version=3.2");
      outputformat = OWS_GML32_SFE_SCHEMA;
    } else {
      msSetError(MS_WFSERR,
                 "Unsupported DescribeFeatureType outputFormat (%s).",
                 "msWFSDescribeFeatureType()", paramsObj->pszOutputFormat);
      if (layers)
        msFreeCharArray(layers, numlayers);
      msFree(mimetype);
      return msWFSException(map, "outputformat",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }
  }
  /* If no outputFormat explicitly asked, use a sensible default for the WFS
     version */
  else {
    switch (nWFSVersion) {
    case OWS_1_0_0:
    default:
      mimetype = msEncodeHTMLEntities(
          "text/xml"); /* ERO: why not "text/xml; subtype=gml/2.1.2" ? */
      break;

    case OWS_1_1_0:
      mimetype = msEncodeHTMLEntities("text/xml; subtype=gml/3.1.1");
      outputformat = OWS_SFE_SCHEMA;
      break;

    case OWS_2_0_0:
      mimetype = msEncodeHTMLEntities("application/gml+xml; version=3.2");
      outputformat = OWS_GML32_SFE_SCHEMA;
      break;
    }
  }

  /* Validate layers */
  if (numlayers > 0) {
    for (i = 0; i < numlayers; i++) {
      layerObj *lp = msWFSGetLayerByName(map, ows_request, layers[i]);
      if (lp == NULL) {
        msSetError(MS_WFSERR,
                   "Invalid typename (%s). A layer might be disabled for \
this request. Check wfs/ows_enable_request settings.",
                   "msWFSDescribeFeatureType()",
                   layers[i]); /* paramsObj->pszTypeName); */
        msFreeCharArray(layers, numlayers);
        msFree(mimetype);
        return msWFSException(map, "typename",
                              MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                              paramsObj->pszVersion);
      }
    }
  }

  /*
  ** retrieve any necessary external namespace/schema configuration information
  */
  namespaceList = msGMLGetNamespaces(&(map->web), "G");
  if (namespaceList == NULL) {
    msSetError(MS_MISCERR, "Unable to populate namespace list",
               "msWFSDescribeFeatureType()");
    return MS_FAILURE;
  }

  /*
  ** DescribeFeatureType response
  */

  msIO_setHeader("Content-Type", "%s; charset=UTF-8", mimetype);
  msIO_sendHeaders();

  if (mimetype)
    msFree(mimetype);

  msIO_printf("<?xml version='1.0' encoding=\"UTF-8\" ?>\n");

  value = msOWSLookupMetadata(&(map->web.metadata), "FO", "namespace_uri");
  if (value)
    user_namespace_uri = value;
  user_namespace_uri_encoded = msEncodeHTMLEntities(user_namespace_uri);

  value = msOWSLookupMetadata(&(map->web.metadata), "FO", "namespace_prefix");
  if (value)
    user_namespace_prefix = value;
  if (user_namespace_prefix != NULL &&
      msIsXMLTagValid(user_namespace_prefix) == MS_FALSE)
    msIO_printf(
        "<!-- WARNING: The value '%s' is not valid XML namespace. -->\n",
        user_namespace_prefix);

  msIO_printf("<schema\n"
              "   targetNamespace=\"%s\" \n"
              "   xmlns:%s=\"%s\" \n",
              user_namespace_uri_encoded, user_namespace_prefix,
              user_namespace_uri_encoded);
  if (nWFSVersion < OWS_2_0_0)
    msWFS_NS_printf(MS_OWSCOMMON_OGC_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_OGC_NAMESPACE_URI);
  msWFS_NS_printf("xsd", MS_OWSCOMMON_W3C_XS_NAMESPACE_URI);
  msWFS_NS_printf(NULL, MS_OWSCOMMON_W3C_XS_NAMESPACE_URI);
  msWFS_NS_printf(MS_OWSCOMMON_GML_NAMESPACE_PREFIX,
                  msWFSGetGMLNamespaceURI(outputformat));

  msWFSPrintAdditionalNamespaces(namespaceList);

  msIO_printf("   elementFormDefault=\"qualified\" version=\"0.1\" >\n");

  encoded = msEncodeHTMLEntities(msOWSGetSchemasLocation(map));

  msIO_printf("\n  <import namespace=\"%s\"\n"
              "          schemaLocation=\"%s%s\" />\n",
              msWFSGetGMLNamespaceURI(outputformat), encoded,
              msWFSGetGMLSchemaLocation(
                  msWFSGetGMLVersionFromSchemaVersion(outputformat)));

  msFree(encoded);

  /* any additional namespace includes */
  for (i = 0; i < namespaceList->numnamespaces; i++) {
    if (namespaceList->namespaces[i].uri &&
        namespaceList->namespaces[i].schemalocation) {
      char *schema_location_encoded = NULL, *uri_encoded = NULL;

      uri_encoded = msEncodeHTMLEntities(namespaceList->namespaces[i].uri);
      schema_location_encoded =
          msEncodeHTMLEntities(namespaceList->namespaces[i].schemalocation);
      msIO_printf("\n  <import namespace=\"%s\"\n schemaLocation=\"%s\" />\n",
                  uri_encoded, schema_location_encoded);
      msFree(uri_encoded);
      msFree(schema_location_encoded);
    }
  }

  /* output definition for the default feature container, can't use
     wfs:FeatureCollection with GML3: kept here so that the behavior with
     wfs1.0 and gml3 output is preserved. We can use the wfs:FeatureCollection
     for wfs1.1*/
  if (outputformat == OWS_SFE_SCHEMA && nWFSVersion == OWS_1_0_0) {
    value =
        msOWSLookupMetadata(&(map->web.metadata), "FO", "feature_collection");
    if (value)
      collection_name = value;

    msIO_printf("  <element name=\"%s\" type=\"%s:%sType\" "
                "substitutionGroup=\"gml:_FeatureCollection\"/>\n",
                collection_name, user_namespace_prefix, collection_name);
    msIO_printf("  <complexType name=\"%sType\">\n", collection_name);
    msIO_printf("    <complexContent>\n");
    msIO_printf(
        "      <extension base=\"gml:AbstractFeatureCollectionType\">\n");
    msIO_printf("        <attribute name=\"version\" type=\"string\" "
                "use=\"required\" fixed=\"1.0.0\"/>\n");
    msIO_printf("      </extension>\n");
    msIO_printf("    </complexContent>\n");
    msIO_printf("  </complexType>\n");
  }

  /*
  ** loop through layers
  */
  for (i = 0; i < map->numlayers; i++) {
    layerObj *lp;
    int j, bFound = 0;

    lp = GET_LAYER(map, i);

    for (j = 0; j < numlayers && !bFound; j++) {
      if (lp->name && strcasecmp(lp->name, layers[j]) == 0)
        bFound = 1;
    }

    if ((numlayers == 0 || bFound) && msWFSIsLayerAllowed(lp, ows_request)) {

      /*
      ** OK, describe this layer IF you can open it and retrieve items
      */
      if (msLayerOpen(lp) == MS_SUCCESS) {
        if (msLayerGetItems(lp) == MS_SUCCESS) {
          int k;
          gmlGroupListObj *groupList = NULL;
          gmlItemListObj *itemList = NULL;
          gmlConstantListObj *constantList = NULL;
          gmlGeometryListObj *geometryList = NULL;
          gmlItemObj *item = NULL;
          gmlConstantObj *constant = NULL;
          char *encoded_name = NULL;

          const char *layer_namespace_prefix;
          const char *substitution_group;
          char *encoded_type = NULL;

          itemList = msGMLGetItems(lp, "G"); /* GML-related metadata */
          constantList = msGMLGetConstants(lp, "G");
          groupList = msGMLGetGroups(lp, "G");
          geometryList = msGMLGetGeometries(lp, "GFO", MS_TRUE);
          if (itemList == NULL || constantList == NULL || groupList == NULL ||
              geometryList == NULL) {
            msSetError(MS_MISCERR,
                       "Unable to populate item and group metadata structures",
                       "msWFSDescribeFeatureType()");
            return MS_FAILURE;
          }

          value =
              msOWSLookupMetadata(&(lp->metadata), "OFG", "namespace_prefix");
          if (value)
            layer_namespace_prefix = value;
          else
            layer_namespace_prefix = user_namespace_prefix;

          encoded_name = msEncodeHTMLEntities(lp->name);
          value = msOWSLookupMetadata(&(lp->metadata), "F", "layer_type");
          if (value) {
            encoded_type = msEncodeHTMLEntities(value);
          } else {
            size_t sz = strlen(encoded_name) + strlen("Type") + 1;
            encoded_type = (char *)msSmallMalloc(sz);
            strlcpy(encoded_type, encoded_name, sz);
            strlcat(encoded_type, "Type", sz);
          }

          switch (outputformat) {
          case OWS_DEFAULT_SCHEMA: /* default GML 2.1.x schema */
          case OWS_SFE_SCHEMA:     /* reference GML 3.1.1 schema */
          default:
            substitution_group = "gml:_Feature";
            break;

          case OWS_GML32_SFE_SCHEMA: /* reference GML 3.2.1 schema */
            substitution_group = "gml:AbstractFeature";
            break;
          }

          msIO_printf("\n"
                      "  <element name=\"%s\" \n"
                      "           type=\"%s:%s\" \n"
                      "           substitutionGroup=\"%s\" />\n\n",
                      encoded_name, layer_namespace_prefix, encoded_type,
                      substitution_group);
          msFree(encoded_type);

          if (strcmp(layer_namespace_prefix, user_namespace_prefix) != 0) {
            msFree(encoded_name);
            msGMLFreeItems(itemList);
            msGMLFreeConstants(constantList);
            msGMLFreeGroups(groupList);
            msGMLFreeGeometries(geometryList);
            continue; /* the rest is defined in an external schema */
          }

          msIO_printf("  <complexType name=\"%sType\">\n", encoded_name);
          msIO_printf("    <complexContent>\n");
          msIO_printf("      <extension base=\"gml:AbstractFeatureType\">\n");
          msIO_printf("        <sequence>\n");

          /* write the geometry schema element(s) */
          msWFSSchemaWriteGeometryElement(stdout, geometryList, outputformat,
                                          "          ");

          /* write the constant-based schema elements */
          for (k = 0; k < constantList->numconstants; k++) {
            constant = &(constantList->constants[k]);
            if (msItemInGroups(constant->name, groupList) == MS_FALSE)
              msWFSWriteConstantElement(stdout, constant, "          ");
          }

          /* write the item-based schema elements */
          for (k = 0; k < itemList->numitems; k++) {
            item = &(itemList->items[k]);
            if (msItemInGroups(item->name, groupList) == MS_FALSE) {
              int nillable = MS_FALSE;
              char mdname[256];
              const char *pszNillable;
              snprintf(mdname, sizeof(mdname), "%s_nillable", item->name);
              pszNillable = msOWSLookupMetadata(&(lp->metadata), "G", mdname);
              if (pszNillable && strcasecmp(pszNillable, "true") == 0)
                nillable = MS_TRUE;
              msWFSWriteItemElement(stdout, item, "          ", outputformat,
                                    nillable);
            }
          }

          for (k = 0; k < groupList->numgroups; k++)
            msWFSWriteGroupElement(stdout, &(groupList->groups[k]),
                                   "          ", user_namespace_prefix);

          msIO_printf("        </sequence>\n");
          msIO_printf("      </extension>\n");
          msIO_printf("    </complexContent>\n");
          msIO_printf("  </complexType>\n");

          /* any group types */
          for (k = 0; k < groupList->numgroups; k++)
            msWFSWriteGroupElementType(stdout, &(groupList->groups[k]),
                                       itemList, constantList, "  ",
                                       outputformat);

          msGMLFreeItems(itemList);
          msGMLFreeConstants(constantList);
          msGMLFreeGroups(groupList);
          msGMLFreeGeometries(geometryList);

          msFree(encoded_name);
        }

        msLayerClose(lp);
      } else {
        msIO_printf("\n\n<!-- ERROR: Failed opening layer %s -->\n\n",
                    lp->name);
      }
    }
  }

  /*
  ** Done!
  */
  msIO_printf("\n</schema>\n");

  msFree(user_namespace_uri_encoded);

  if (layers)
    msFreeCharArray(layers, numlayers);

  msGMLFreeNamespaces(namespaceList);

  return MS_SUCCESS;
}

/*
** msWFSGetFeature_GMLPreamble()
**
** Generate the GML preamble up to the first feature for the builtin
** WFS GML support.
*/

typedef struct {
  const char *user_namespace_prefix;
  const char *user_namespace_uri;
  char *user_namespace_uri_encoded;
  const char *collection_name;
  const char *_typename;
  char *script_url, *script_url_encoded;
  const char *output_mime_type;
  const char *output_schema_format;
} WFSGMLInfo;

static void msWFSPrintURLAndXMLEncoded(const char *str) {
  char *url_encoded = msEncodeUrl(str);
  char *xml_encoded = msEncodeHTMLEntities(url_encoded);
  msIO_printf("%s", xml_encoded);
  msFree(xml_encoded);
  msFree(url_encoded);
}

static void msWFSGetFeature_PrintBasePrevNextURI(
    cgiRequestObj *req, WFSGMLInfo *gmlinfo, wfsParamsObj *paramsObj,
    const char *encoded_version, const char *encoded_typename,
    const char *encoded_mime_type) {
  int i;
  int bFirstArg = MS_TRUE;
  msIO_printf("%s", gmlinfo->script_url_encoded);

  if (req->postrequest != NULL) {
    msIO_printf("SERVICE=WFS&amp;VERSION=");
    msIO_printf("%s", encoded_version);
    msIO_printf("&amp;REQUEST=");
    msIO_printf("%s", paramsObj->pszRequest);
    msIO_printf("&amp;TYPENAMES=");
    msIO_printf("%s", encoded_typename);
    msIO_printf("&amp;OUTPUTFORMAT=");
    msIO_printf("%s", encoded_mime_type);
    if (paramsObj->pszBbox != NULL) {
      msIO_printf("&amp;BBOX=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszBbox);
    }
    if (paramsObj->pszSrs != NULL) {
      msIO_printf("&amp;SRSNAME=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszSrs);
    }
    if (paramsObj->pszFilter != NULL) {
      msIO_printf("&amp;FILTER=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszFilter);
    }
    if (paramsObj->pszPropertyName != NULL) {
      msIO_printf("&amp;PROPERTYNAME=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszPropertyName);
    }
    if (paramsObj->pszValueReference != NULL) {
      msIO_printf("&amp;VALUEREFERENCE=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszValueReference);
    }
    if (paramsObj->pszSortBy != NULL) {
      msIO_printf("&amp;SORTBY=");
      msWFSPrintURLAndXMLEncoded(paramsObj->pszSortBy);
    }
    if (paramsObj->nMaxFeatures >= 0)
      msIO_printf("&amp;COUNT=%d", paramsObj->nMaxFeatures);
  } else {
    for (i = 0; i < req->NumParams; i++) {
      if (req->ParamNames[i] && req->ParamValues[i] &&
          strcasecmp(req->ParamNames[i], "MAP") != 0 &&
          strcasecmp(req->ParamNames[i], "STARTINDEX") != 0 &&
          strcasecmp(req->ParamNames[i], "RESULTTYPE") != 0) {
        if (!bFirstArg)
          msIO_printf("&amp;");
        bFirstArg = MS_FALSE;
        msIO_printf("%s=", req->ParamNames[i]);
        msWFSPrintURLAndXMLEncoded(req->ParamValues[i]);
      }
    }
  }
}

static void msWFSGetFeature_GetTimeStamp(char *timestring,
                                         size_t timestringlen) {
  struct tm *now;
  time_t tim = time(NULL);

  now = localtime(&tim);

  snprintf(timestring, timestringlen, "%d-%02d-%02dT%02d:%02d:%02d",
           now->tm_year + 1900, now->tm_mon + 1, now->tm_mday, now->tm_hour,
           now->tm_min, now->tm_sec);
}

static int msWFSGetFeature_GMLPreamble(
    mapObj *map, cgiRequestObj *req, WFSGMLInfo *gmlinfo,
    wfsParamsObj *paramsObj, OWSGMLVersion outputformat, int iResultTypeHits,
    int iNumberOfFeatures, int nMatchingFeatures, int maxfeatures,
    int bHasNextFeatures, int nWFSVersion)

{
  const char *value;
  char *encoded_version, *encoded_typename, *encoded_schema;
  gmlNamespaceListObj *namespaceList =
      NULL; /* for external application schema support */
  char timestring[100];
  timestring[0] = '\0';

  namespaceList = msGMLGetNamespaces(&(map->web), "G");
  if (namespaceList == NULL) {
    msSetError(MS_MISCERR, "Unable to populate namespace list",
               "msWFSGetFeature_GMLPreamble()");
    return MS_FAILURE;
  }

  /*
  ** Establish script_url.
  */

  if ((gmlinfo->script_url =
           msOWSGetOnlineResource(map, "FO", "onlineresource", req)) == NULL ||
      (gmlinfo->script_url_encoded =
           msEncodeHTMLEntities(gmlinfo->script_url)) == NULL) {
    msSetError(MS_WFSERR, "Server URL not found", "msWFSGetFeature()");
    msGMLFreeNamespaces(namespaceList);
    return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                          paramsObj->pszVersion);
  }

  /*
  ** Write encoding.
  */
  msIO_printf("<?xml version='1.0' encoding=\"UTF-8\" ?>\n");

  value = msOWSLookupMetadata(&(map->web.metadata), "FO", "namespace_uri");
  if (value)
    gmlinfo->user_namespace_uri = value;
  gmlinfo->user_namespace_uri_encoded =
      msEncodeHTMLEntities(gmlinfo->user_namespace_uri);

  value = msOWSLookupMetadata(&(map->web.metadata), "FO", "namespace_prefix");
  if (value)
    gmlinfo->user_namespace_prefix = value;

  if (gmlinfo->user_namespace_prefix != NULL &&
      msIsXMLTagValid(gmlinfo->user_namespace_prefix) == MS_FALSE)
    msIO_printf(
        "<!-- WARNING: The value '%s' is not valid XML namespace. -->\n",
        gmlinfo->user_namespace_prefix);

  value = msOWSLookupMetadata(&(map->web.metadata), "FO", "feature_collection");
  if (value)
    gmlinfo->collection_name = value;

  encoded_version = msEncodeHTMLEntities(paramsObj->pszVersion);
  encoded_typename = msEncodeHTMLEntities(gmlinfo->_typename);
  encoded_schema = msEncodeHTMLEntities(msOWSGetSchemasLocation(map));

  if (nWFSVersion >= OWS_2_0_0) {
    int nNextStartIndex;
    char *tmp;
    char *encoded_mime_type;
    int bAbleToPrintPreviousOrNext = MS_TRUE;

    tmp = msEncodeUrl(gmlinfo->output_mime_type);
    encoded_mime_type = msEncodeHTMLEntities(tmp);
    msFree(tmp);

    msWFSGetFeature_GetTimeStamp(timestring, sizeof(timestring));

    if (strcasecmp(paramsObj->pszRequest, "GetFeature") == 0)
      msIO_printf("<wfs:FeatureCollection\n");
    else
      msIO_printf("<wfs:ValueCollection\n");

    msWFS_NS_printf(gmlinfo->user_namespace_prefix,
                    gmlinfo->user_namespace_uri_encoded);
    msWFS_NS_printf(MS_OWSCOMMON_GML_NAMESPACE_PREFIX,
                    msWFSGetGMLNamespaceURIFromGMLVersion(outputformat));
    msWFS_NS_printf(MS_OWSCOMMON_WFS_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_WFS_20_NAMESPACE_URI);
    msWFS_NS_printf(MS_OWSCOMMON_W3C_XSI_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_W3C_XSI_NAMESPACE_URI);
    msWFSPrintAdditionalNamespaces(namespaceList);

    msIO_printf("   xsi:schemaLocation=\"%s "
                "%sSERVICE=WFS&amp;VERSION=%s&amp;REQUEST=DescribeFeatureType&"
                "amp;TYPENAME=%s&amp;OUTPUTFORMAT=%s "
                "%s %s%s "
                "%s %s%s\"\n",
                gmlinfo->user_namespace_uri_encoded,
                gmlinfo->script_url_encoded, encoded_version, encoded_typename,
                gmlinfo->output_schema_format,

                MS_OWSCOMMON_WFS_20_NAMESPACE_URI, encoded_schema,
                MS_OWSCOMMON_WFS_20_SCHEMA_LOCATION,

                msWFSGetGMLNamespaceURIFromGMLVersion(outputformat),
                encoded_schema, msWFSGetGMLSchemaLocation(outputformat));

    msIO_printf("   timeStamp=\"%s\" numberMatched=\"", timestring);
    if (nMatchingFeatures < 0) {
      /* If we don't know the exact number, at least return something */
      /* equivalent to what we would return with WFS 1.1, otherwise */
      /* resultType=hits would not return anything useful to the client. */
      if (iResultTypeHits == MS_TRUE)
        msIO_printf("%d", iNumberOfFeatures);
      else
        msIO_printf("unknown");
    } else
      msIO_printf("%d", nMatchingFeatures);
    msIO_printf("\" numberReturned=\"%d\"",
                (iResultTypeHits == 1) ? 0 : iNumberOfFeatures);

    /* TODO: in case of a multi-layer GetFeature POST, it is difficult to build
     * a */
    /* valid GET KVP GetFeature/GetPropertyValue when some options are
     * specified. So for now just */
    /* avoid those problematic cases */
    if (req->postrequest != NULL &&
        (paramsObj->bHasPostStoredQuery ||
         (strchr(encoded_typename, ',') != NULL &&
          (paramsObj->pszFilter != NULL || paramsObj->pszPropertyName != NULL ||
           paramsObj->pszSortBy != NULL)))) {
      bAbleToPrintPreviousOrNext = MS_FALSE;
    }

    if (bAbleToPrintPreviousOrNext) {
      if (maxfeatures > 0 && iResultTypeHits != 1 &&
          paramsObj->nStartIndex > 0 &&
          ((nMatchingFeatures < 0 && iNumberOfFeatures > 0) ||
           (nMatchingFeatures >= 0 &&
            paramsObj->nStartIndex < nMatchingFeatures))) {
        int nPrevStartIndex;

        msIO_printf("\n");
        msIO_printf("   previous=\"");
        msWFSGetFeature_PrintBasePrevNextURI(req, gmlinfo, paramsObj,
                                             encoded_version, encoded_typename,
                                             encoded_mime_type);

        nPrevStartIndex = paramsObj->nStartIndex - maxfeatures;
        if (nPrevStartIndex > 0)
          msIO_printf("&amp;STARTINDEX=%d", nPrevStartIndex);
        msIO_printf("\"");
      }

      if (iResultTypeHits != 1 && paramsObj->nStartIndex >= 0)
        nNextStartIndex = paramsObj->nStartIndex;
      else
        nNextStartIndex = 0;
      if (maxfeatures > 0 &&
          (bHasNextFeatures ||
           (nMatchingFeatures > 0 &&
            (iResultTypeHits == 1 ||
             iNumberOfFeatures + nNextStartIndex < nMatchingFeatures)))) {
        msIO_printf("\n");
        msIO_printf("   next=\"");
        msWFSGetFeature_PrintBasePrevNextURI(req, gmlinfo, paramsObj,
                                             encoded_version, encoded_typename,
                                             encoded_mime_type);

        if (iResultTypeHits != 1) {
          if (bHasNextFeatures && iNumberOfFeatures < maxfeatures)
            /**
             * There are potentially more features to be found here, even
             * though result contain less than asked for.
             */
            nNextStartIndex += maxfeatures;
          else
            nNextStartIndex += iNumberOfFeatures;
        }

        if (nNextStartIndex > 0)
          msIO_printf("&amp;STARTINDEX=%d", nNextStartIndex);
        msIO_printf("\"");
      }
    }

    msIO_printf(">\n");

    msFree(encoded_mime_type);
  }
  /*
  ** GML 2.x
  */
  else if (outputformat == OWS_GML2) { /* use a wfs:FeatureCollection */
    msIO_printf("<wfs:FeatureCollection\n");
    msWFS_NS_printf(gmlinfo->user_namespace_prefix,
                    gmlinfo->user_namespace_uri_encoded);
    msWFS_NS_printf(MS_OWSCOMMON_WFS_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_WFS_NAMESPACE_URI);
    msWFS_NS_printf(MS_OWSCOMMON_GML_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_GML_NAMESPACE_URI);
    msWFS_NS_printf(MS_OWSCOMMON_OGC_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_OGC_NAMESPACE_URI);
    msWFS_NS_printf(MS_OWSCOMMON_W3C_XSI_NAMESPACE_PREFIX,
                    MS_OWSCOMMON_W3C_XSI_NAMESPACE_URI);
    msWFSPrintAdditionalNamespaces(namespaceList);

    /* FIXME ? : the schemaLocation will be only valid for WFS 1.0.0 */
    msIO_printf("   xsi:schemaLocation=\"http://www.opengis.net/wfs "
                "%s/wfs/%s/WFS-basic.xsd \n"
                "                       %s "
                "%sSERVICE=WFS&amp;VERSION=%s&amp;REQUEST=DescribeFeatureType&"
                "amp;TYPENAME=%s&amp;OUTPUTFORMAT=%s\">\n",
                encoded_schema, encoded_version,
                gmlinfo->user_namespace_uri_encoded,
                gmlinfo->script_url_encoded, encoded_version, encoded_typename,
                gmlinfo->output_schema_format);
  }

  /*
  ** GML 3
  */
  else if (outputformat == OWS_GML3) {
    if (nWFSVersion == OWS_1_1_0) {
      msIO_printf("<wfs:FeatureCollection\n");
      msWFS_NS_printf(gmlinfo->user_namespace_prefix,
                      gmlinfo->user_namespace_uri_encoded);
      msWFS_NS_printf(MS_OWSCOMMON_GML_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_GML_NAMESPACE_URI);
      msWFS_NS_printf(MS_OWSCOMMON_WFS_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_WFS_NAMESPACE_URI);
      msWFS_NS_printf(MS_OWSCOMMON_OGC_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_OGC_NAMESPACE_URI);
      msWFS_NS_printf(MS_OWSCOMMON_W3C_XSI_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_W3C_XSI_NAMESPACE_URI);
    } else {
      msIO_printf("<%s:%s\n"
                  "   version=\"1.0.0\"\n",
                  gmlinfo->user_namespace_prefix, gmlinfo->collection_name);
      msWFS_NS_printf(gmlinfo->user_namespace_prefix,
                      gmlinfo->user_namespace_uri_encoded);
      msWFS_NS_printf(MS_OWSCOMMON_GML_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_GML_NAMESPACE_URI);
      msWFS_NS_printf(MS_OWSCOMMON_OGC_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_OGC_NAMESPACE_URI);
      msWFS_NS_printf(MS_OWSCOMMON_W3C_XSI_NAMESPACE_PREFIX,
                      MS_OWSCOMMON_W3C_XSI_NAMESPACE_URI);
    }

    msWFSPrintAdditionalNamespaces(namespaceList);

    msIO_printf("   xsi:schemaLocation=\"%s "
                "%sSERVICE=WFS&amp;VERSION=%s&amp;REQUEST=DescribeFeatureType&"
                "amp;TYPENAME=%s&amp;OUTPUTFORMAT=%s",
                gmlinfo->user_namespace_uri_encoded,
                gmlinfo->script_url_encoded, encoded_version, encoded_typename,
                gmlinfo->output_schema_format);

    if (nWFSVersion == OWS_1_1_0) {

      msIO_printf("  %s %s%s", MS_OWSCOMMON_WFS_NAMESPACE_URI, encoded_schema,
                  MS_OWSCOMMON_WFS_11_SCHEMA_LOCATION);

      if (iResultTypeHits == 1) {
        msWFSGetFeature_GetTimeStamp(timestring, sizeof(timestring));

        msIO_printf("\" timeStamp=\"%s\" numberOfFeatures=\"%d", timestring,
                    iNumberOfFeatures);
      }
    }
    msIO_printf("\">\n");
  }

  msFree(encoded_version);
  msFree(encoded_schema);
  msFree(encoded_typename);

  msGMLFreeNamespaces(namespaceList);

  return MS_SUCCESS;
}

/*
** msWFSGetFeature_GMLPostfix()
**
** Generate the GML file tail closing the collection and cleanup a bit.
*/

static int msWFSGetFeature_GMLPostfix(WFSGMLInfo *gmlinfo,
                                      OWSGMLVersion outputformat,
                                      int maxfeatures, int iResultTypeHits,
                                      int iNumberOfFeatures, int nWFSVersion)

{
  if (((iNumberOfFeatures == 0) || (maxfeatures == 0)) &&
      iResultTypeHits == 0) {

    if (nWFSVersion < OWS_2_0_0) {
      msIO_printf("   <gml:boundedBy>\n");
      if (outputformat == OWS_GML3 || outputformat == OWS_GML32)
        msIO_printf("      <gml:Null>missing</gml:Null>\n");
      else
        msIO_printf("      <gml:null>missing</gml:null>\n");
      msIO_printf("   </gml:boundedBy>\n");
    }
  }

  if (outputformat == OWS_GML2)
    msIO_printf("</wfs:FeatureCollection>\n\n");
  else {
    if (nWFSVersion >= OWS_1_1_0)
      msIO_printf("</wfs:FeatureCollection>\n\n");
    else
      msIO_printf("</%s:%s>\n\n", gmlinfo->user_namespace_prefix,
                  gmlinfo->collection_name);
  }

  return MS_SUCCESS;
}

/*
** msWFSBuildParamList()
*/
static void msWFSBuildParamList(char **ppszStrList, const char *pszValue,
                                const char *pszSep) {
  if (*ppszStrList == NULL)
    *ppszStrList = msStrdup(pszValue);
  else {
    char *pszTmp = msStrdup(*ppszStrList);
    size_t nSize = strlen(pszTmp) + strlen(pszSep) + strlen(pszValue) + 1;
    *ppszStrList = (char *)msSmallRealloc(*ppszStrList, nSize);

    snprintf(*ppszStrList, nSize, "%s%s%s", pszTmp, pszSep, pszValue);
    free(pszTmp);
  }
}

/*
** msWFSTurnOffAllLayer()
*/
static void msWFSTurnOffAllLayer(mapObj *map) {
  int j;
  for (j = 0; j < map->numlayers; j++) {
    layerObj *lp;
    lp = GET_LAYER(map, j);
    lp->status = MS_OFF;
  }
}

/*
** msWFSRunFilter()
*/
static int msWFSRunFilter(mapObj *map, layerObj *lp,
                          const wfsParamsObj *paramsObj, const char *pszFilter,
                          int nWFSVersion) {
  int layerWasOpened;
  FilterEncodingNode *psNode = NULL;

  psNode = FLTParseFilterEncoding(pszFilter);

  if (!psNode) {
    msSetError(MS_WFSERR, "Invalid or Unsupported FILTER in GetFeature : %s",
               "msWFSGetFeature()", pszFilter);
    return msWFSException(map, "filter", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  /* Starting with WFS 1.1, we need to swap coordinates of BBOX or geometry */
  /* parameters in some circumstances */
  if (nWFSVersion >= OWS_1_1_0) {
    int bDefaultSRSNeedsAxisSwapping = MS_FALSE;
    char *srs;
    msOWSGetEPSGProj(&(map->projection), &(map->web.metadata), "FO", MS_TRUE,
                     &srs);
    if (!srs) {
      msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "FO", MS_TRUE, &srs);
    }
    if (srs && strncasecmp(srs, "EPSG:", 5) == 0) {
      bDefaultSRSNeedsAxisSwapping = msIsAxisInverted(atoi(srs + 5));
    }
    msFree(srs);
    FLTDoAxisSwappingIfNecessary(map, psNode, bDefaultSRSNeedsAxisSwapping);
  }

  layerWasOpened = msLayerIsOpen(lp);
  if (!layerWasOpened && msLayerOpen(lp) != MS_SUCCESS) {
    FLTFreeFilterEncodingNode(psNode);
    return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                          paramsObj->pszVersion);
  }

  FLTProcessPropertyIsNull(psNode, map, lp->index);

  /*preparse the filter for gml aliases*/
  FLTPreParseFilterForAliasAndGroup(psNode, map, lp->index, "G");

  /* Check that FeatureId filters are consistent with the active layer */
  if (FLTCheckFeatureIdFilters(psNode, map, lp->index) == MS_FAILURE) {
    FLTFreeFilterEncodingNode(psNode);
    return msWFSException(map, "resourceid",
                          MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  /* FIXME?: could probably apply to WFS 1.1 too */
  if (nWFSVersion >= OWS_2_0_0) {
    int nEvaluation;

    if (FLTCheckInvalidOperand(psNode) == MS_FAILURE) {
      FLTFreeFilterEncodingNode(psNode);
      return msWFSException(map, "filter",
                            MS_WFS_ERROR_OPERATION_PROCESSING_FAILED,
                            paramsObj->pszVersion);
    }

    if (FLTCheckInvalidProperty(psNode, map, lp->index) == MS_FAILURE) {
      FLTFreeFilterEncodingNode(psNode);
      return msWFSException(map, "filter", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }

    psNode = FLTSimplify(psNode, &nEvaluation);
    if (psNode == NULL) {
      FLTFreeFilterEncodingNode(psNode);
      if (nEvaluation == 1) {
        /* return full layer */
        return msWFSRunBasicGetFeature(map, lp, paramsObj, nWFSVersion);
      } else {
        /* return empty result set */
        return MS_SUCCESS;
      }
    }
  }

  // ignore any classes used by the WFS layer to avoid selecting fields we don't
  // need
  int numclasses = lp->numclasses;
  lp->numclasses = 0;

  /* run filter.  If no results are found, do not throw exception */
  /* this is a null result */
  int status = FLTApplyFilterToLayer(psNode, map, lp->index);

  // set the class count to the original value
  lp->numclasses = numclasses;

  if (status != MS_SUCCESS) {
    errorObj *ms_error = msGetErrorObj();

    if (ms_error->code != MS_NOTFOUND) {
      msSetError(MS_WFSERR, "FLTApplyFilterToLayer() failed",
                 "msWFSGetFeature()");
      FLTFreeFilterEncodingNode(psNode);
      return msWFSException(map, "mapserv",
                            (nWFSVersion >= OWS_2_0_0)
                                ? MS_WFS_ERROR_OPERATION_PROCESSING_FAILED
                                : MS_OWS_ERROR_NO_APPLICABLE_CODE,
                            paramsObj->pszVersion);
    }
  }

  FLTFreeFilterEncodingNode(psNode);

  return MS_SUCCESS;
}

/*
** msWFSRunBasicGetFeature()
*/
static int msWFSRunBasicGetFeature(mapObj *map, layerObj *lp,
                                   const wfsParamsObj *paramsObj,
                                   int nWFSVersion) {
  rectObj ext;
  int status;

  map->query.type = MS_QUERY_BY_RECT; /* setup the query */
  map->query.mode = MS_QUERY_MULTIPLE;
  map->query.rect = map->extent;
  map->query.layer = lp->index;

  if (FLTLayerSetInvalidRectIfSupported(lp, &(map->query.rect), "FO")) {
    /* do nothing */
  } else if (msOWSGetLayerExtent(map, lp, "FO", &ext) == MS_SUCCESS) {
    char *pszMapSRS = NULL;

    /*if srsName was given for wfs 1.1.0, It is at this point loaded into the
    map object and should be used*/
    if (!paramsObj->pszSrs)
      msOWSGetEPSGProj(&(map->projection), &(map->web.metadata), "FO", MS_TRUE,
                       &pszMapSRS);

    /* For a single point layer, to avoid numerical precision issues */
    /* when reprojection is involved */
    ext.minx -= 1e-5;
    ext.miny -= 1e-5;
    ext.maxx += 1e-5;
    ext.maxy += 1e-5;

    if (pszMapSRS != NULL && strncmp(pszMapSRS, "EPSG:", 5) == 0) {

      if (nWFSVersion >= OWS_1_1_0)
        status = msLoadProjectionStringEPSG(&(map->projection), pszMapSRS);
      else
        status = msLoadProjectionString(&(map->projection), pszMapSRS);

      if (status != 0) {
        msSetError(MS_WFSERR, "msLoadProjectionString() failed: %s",
                   "msWFSGetFeature()", pszMapSRS);
        msFree(pszMapSRS);
        return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                              paramsObj->pszVersion);
      }
    }
    msFree(pszMapSRS);

    /*make sure that the layer projection is loaded.
        It could come from a ows/wfs_srs metadata*/
    if (lp->projection.numargs == 0) {
      char *pszLayerSRS;
      msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "FO", MS_TRUE,
                       &pszLayerSRS);
      if (pszLayerSRS) {
        if (strncmp(pszLayerSRS, "EPSG:", 5) == 0) {
          if (nWFSVersion >= OWS_1_1_0)
            msLoadProjectionStringEPSG(&(lp->projection), pszLayerSRS);
          else
            msLoadProjectionString(&(lp->projection), pszLayerSRS);
        }
      }
      msFree(pszLayerSRS);
    }

    if (msProjectionsDiffer(&map->projection, &lp->projection) == MS_TRUE) {
      msProjectRect(&lp->projection, &map->projection, &(ext));
    }
    map->query.rect = ext;
  }

  if (msQueryByRect(map) != MS_SUCCESS) {
    errorObj *ms_error;
    ms_error = msGetErrorObj();

    if (ms_error->code != MS_NOTFOUND) {
      msSetError(MS_WFSERR, "ms_error->code not found", "msWFSGetFeature()");
      return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                            paramsObj->pszVersion);
    }
  }

  return MS_SUCCESS;
}

/*
** msWFSRetrieveFeatures()
*/
static int msWFSRetrieveFeatures(
    mapObj *map, owsRequestObj *ows_request, const wfsParamsObj *paramsObj,
    const WFSGMLInfo *gmlinfo, const char *pszFilter, int bBBOXSet,
    const char *pszBBOXSRS, rectObj bbox, const char *pszFeatureId,
    char **layers, int numlayers, int maxfeatures, int nWFSVersion,
    int *pnOutTotalFeatures, int *pnHasNext) {
  int i, j;
  int iNumberOfFeatures = 0;
  int anyLyrHasNext = MS_FALSE;

  if (pszFilter && strlen(pszFilter) > 0) {
    int nFilters;
    char **paszFilter = NULL;

    /* -------------------------------------------------------------------- */
    /*      Validate the parameters. When a FILTER parameter is given,      */
    /*      It needs the TYPENAME parameter for the layers. Also Filter     */
    /*      is Mutually exclusive with FEATUREID and BBOX (see wfs specs    */
    /*      1.0 section 13.7.3 on GetFeature)                               */
    /*                                                                      */
    /* -------------------------------------------------------------------- */

    /* WFS 2.0 */
    if (nWFSVersion >= OWS_2_0_0 && paramsObj->pszFilterLanguage != NULL &&
        strcasecmp(paramsObj->pszFilterLanguage,
                   "urn:ogc:def:query Language:OGC-FES:Filter") != 0) {
      msSetError(MS_WFSERR,
                 "Unhandled value for FILTER_LANGUAGE parameter. Only "
                 "\"urn:ogc:def:query Language:OGC-FES:Filter\" accepted.",
                 "msWFSGetFeature()");
      return msWFSException(map, "filter_language",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }

    if (gmlinfo->_typename == NULL || strlen(gmlinfo->_typename) <= 0 ||
        layers == NULL || numlayers <= 0) {
      msSetError(MS_WFSERR,
                 "Required %s parameter missing for GetFeature with a FILTER "
                 "parameter.",
                 "msWFSGetFeature()",
                 (nWFSVersion >= OWS_2_0_0) ? "TYPENAMES" : "TYPENAME");
      return msWFSException(
          map, (nWFSVersion >= OWS_2_0_0) ? "typenames" : "typename",
          MS_OWS_ERROR_MISSING_PARAMETER_VALUE, paramsObj->pszVersion);
    }

    if (bBBOXSet) {
      msSetError(MS_WFSERR,
                 "BBOX parameter and FILTER parameter are mutually exclusive "
                 "in GetFeature.",
                 "msWFSGetFeature()");
      return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                            paramsObj->pszVersion);
    }

    if (pszFeatureId != NULL) {
      msSetError(MS_WFSERR,
                 "%s parameter and FILTER parameter are mutually exclusive in "
                 "GetFeature.",
                 "msWFSGetFeature()",
                 (nWFSVersion < OWS_2_0_0) ? "FEATUREID" : "RESOURCEID");
      return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                            paramsObj->pszVersion);
    }

    if (msWFSGetFeatureApplySRS(map, paramsObj->pszSrs, nWFSVersion) ==
        MS_FAILURE)
      return msWFSException(map, "srsname",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);

    /* -------------------------------------------------------------------- */
    /*      Parse the Filter parameter. If there are several Filter         */
    /*      parameters, each Filter is inside a parentheses. Eg :           */
    /*      FILTER=(<Filter><Within><PropertyName>                          */
    /*      INWATERA_1M/WKB_GEOM|INWATERA_1M/WKB_GEOM                       */
    /*      <PropertyName><gml:Box><gml:coordinates>10,10
     * 20,20</gml:coordinates>*/
    /*      </gml:Box></Within></Filter>)(<Filter><Within><PropertyName>    */
    /*      INWATERA_1M/WKB_GEOM<PropertyName><gml:Box><gml:coordinates>10,10*/
    /*      20,20</gml:coordinates></gml:Box></Within></Filter>)            */
    /* -------------------------------------------------------------------- */
    nFilters = 0;
    if (strlen(pszFilter) > 0 && pszFilter[0] == '(') {
      paszFilter = FLTSplitFilters(pszFilter, &nFilters);
    } else if (numlayers == 1) {
      nFilters = 1;
      paszFilter = (char **)msSmallMalloc(sizeof(char *) * nFilters);
      paszFilter[0] = msStrdup(pszFilter);
    }

    if (numlayers != nFilters) {
      msSetError(MS_WFSERR,
                 "Wrong number of filter elements, one filter must be "
                 "specified for each feature type listed in the %s parameter.",
                 "msWFSGetFeature()",
                 (nWFSVersion >= OWS_2_0_0) ? "TYPENAMES" : "TYPENAME");
      msFreeCharArray(paszFilter, nFilters);
      return msWFSException(map, "filter", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }

    /* -------------------------------------------------------------------- */
    /*      run through the filters and build the class expressions.        */
    /* -------------------------------------------------------------------- */
    for (i = 0; i < nFilters; i++) {
      int status;
      layerObj *lp;

      lp = msWFSGetLayerByName(map, ows_request, layers[i]);

      /* Special value set when parsing XML Post when there is a mix of */
      /* Query with and without Filter */
      if (strcmp(paszFilter[i], "!") == 0)
        status = msWFSRunBasicGetFeature(map, lp, paramsObj, nWFSVersion);
      else
        status = msWFSRunFilter(map, lp, paramsObj, paszFilter[i], nWFSVersion);

      if (status != MS_SUCCESS) {
        msFreeCharArray(paszFilter, nFilters);
        return status;
      }

      /* Decrement the total maxfeatures */
      if (map->query.maxfeatures >= 0) {
        if (lp->resultcache && lp->resultcache->numresults > 0) {
          map->query.maxfeatures -= lp->resultcache->numresults;
          if (map->query.maxfeatures <= 0)
            break;
        }
      }
    }

    msFreeCharArray(paszFilter, nFilters);
  } /* end if filter set */

  if (pszFeatureId != NULL) {
    char **tokens = NULL;
    int nTokens = 0, j = 0, k = 0;
    char **aFIDLayers = NULL;
    char **aFIDValues = NULL;
    int iFIDLayers = 0;

    /* Keep only selected layers, set to OFF by default. */
    msWFSTurnOffAllLayer(map);

    /*featureid can be a list INWATERA_1M.1234, INWATERA_1M.1235
    We will keep all the feature id from the same layer together
    so that an OR would be applied if several of them are present
    */
    tokens = msStringSplit(pszFeatureId, ',', &nTokens);
    iFIDLayers = 0;
    if (tokens && nTokens >= 1) {
      aFIDLayers = (char **)msSmallMalloc(sizeof(char *) * nTokens);
      aFIDValues = (char **)msSmallMalloc(sizeof(char *) * nTokens);
      for (j = 0; j < nTokens; j++) {
        aFIDLayers[j] = NULL;
        aFIDValues[j] = NULL;
      }
      for (j = 0; j < nTokens; j++) {
        const char *pszLastDot = strrchr(tokens[j], '.');
        if (pszLastDot != NULL) {
          char *pszLayerInFID = msStrdup(tokens[j]);
          pszLayerInFID[pszLastDot - tokens[j]] = '\0';
          /* Find if the layer is already requested */
          for (k = 0; k < iFIDLayers; k++) {
            if (strcasecmp(aFIDLayers[k], pszLayerInFID) == 0)
              break;
          }
          /* If not, add it to the list of requested layers */
          if (k == iFIDLayers) {
            aFIDLayers[iFIDLayers] = msStrdup(pszLayerInFID);
            iFIDLayers++;
          }
          /* Add the id to the list of search identifiers of the layer */
          if (aFIDValues[k] != NULL)
            aFIDValues[k] = msStringConcatenate(aFIDValues[k], ",");
          aFIDValues[k] = msStringConcatenate(aFIDValues[k], pszLastDot + 1);
          msFree(pszLayerInFID);
        } else {
          /* In WFS 20, an unknown/invalid feature id shouldn't trigger an */
          /* exception. Tested by CITE */
          if (nWFSVersion < OWS_2_0_0) {
            msSetError(MS_WFSERR,
                       "Invalid FeatureId in GetFeature. Expecting "
                       "layername.value : %s",
                       "msWFSGetFeature()", tokens[j]);
            if (tokens)
              msFreeCharArray(tokens, nTokens);
            msFreeCharArray(aFIDLayers, iFIDLayers);
            msFreeCharArray(aFIDValues, iFIDLayers);
            return msWFSException(map, "featureid",
                                  MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                                  paramsObj->pszVersion);
          }
        }
      }
    }
    if (tokens)
      msFreeCharArray(tokens, nTokens);

    /*turn on the layers and make sure projections are set properly*/
    for (j = 0; j < iFIDLayers; j++) {
      layerObj *lp;
      lp = msWFSGetLayerByName(map, ows_request, aFIDLayers[j]);
      if (lp == NULL) {
        msSetError(
            MS_WFSERR,
            "Invalid typename given with FeatureId in GetFeature : %s. A layer might be disabled for \
this request. Check wfs/ows_enable_request settings.",
            "msWFSGetFeature()", aFIDLayers[j]);

        msFreeCharArray(aFIDLayers, iFIDLayers);
        msFreeCharArray(aFIDValues, iFIDLayers);
        return msWFSException(map, "featureid",
                              MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                              paramsObj->pszVersion);
      }

      lp->status = MS_ON;
    }

    if (map->query.only_cache_result_count == MS_FALSE)
      msWFSAnalyzeStartIndexAndFeatureCount(map, paramsObj, FALSE, NULL, NULL);

    if (msWFSGetFeatureApplySRS(map, paramsObj->pszSrs, nWFSVersion) ==
        MS_FAILURE)
      return msWFSException(map, "srsname",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);

    for (j = 0; j < iFIDLayers; j++) {
      layerObj *lp;
      lp = msWFSGetLayerByName(map, ows_request, aFIDLayers[j]);
      if (lp->_template == NULL) {
        /* Force setting a template to enable query. */
        lp->_template = msStrdup("ttt.html");
      }
      FilterEncodingNode *psNode =
          FLTCreateFeatureIdFilterEncoding(aFIDValues[j]);

      if (FLTApplyFilterToLayer(psNode, map, lp->index) != MS_SUCCESS) {
        msSetError(MS_WFSERR, "FLTApplyFilterToLayer() failed",
                   "msWFSGetFeature");
        FLTFreeFilterEncodingNode(psNode);
        msFreeCharArray(aFIDLayers, iFIDLayers);
        msFreeCharArray(aFIDValues, iFIDLayers);
        return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                              paramsObj->pszVersion);
      }

      FLTFreeFilterEncodingNode(psNode);

      /* Decrement the total maxfeatures */
      if (map->query.maxfeatures >= 0) {
        if (lp->resultcache && lp->resultcache->numresults > 0) {
          map->query.maxfeatures -= lp->resultcache->numresults;
          if (map->query.maxfeatures <= 0)
            break;
        }
      }
    }

    msFreeCharArray(aFIDLayers, iFIDLayers);
    msFreeCharArray(aFIDValues, iFIDLayers);
  }

  /*
  ** Perform Query (only BBOX for now)
  */
  /* __TODO__ Using a rectangle query may not be the most efficient way */
  /* to do things here. */
  if (pszFilter == NULL && pszFeatureId == NULL) {

    /* Apply the requested SRS */
    if (msWFSGetFeatureApplySRS(map, paramsObj->pszSrs, nWFSVersion) ==
        MS_FAILURE)
      return msWFSException(map, "srsname",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);

    if (!bBBOXSet) {
      for (j = 0; j < map->numlayers; j++) {
        layerObj *lp;
        lp = GET_LAYER(map, j);
        if (lp->status == MS_ON) {
          // classes don't affect retrieval of features, so set the count to 0
          // when the query is executed this avoids selecting any fields
          // referenced in a CLASS from the data source
          int numclasses = lp->numclasses;
          lp->numclasses = 0;
          int status = msWFSRunBasicGetFeature(map, lp, paramsObj, nWFSVersion);
          // set the class count back to its original value once the query is
          // run
          lp->numclasses = numclasses;
          if (status != MS_SUCCESS)
            return status;
        }
      }
    } else {

      char *sBBoxSrs = NULL;

      if (pszBBOXSRS != NULL)
        sBBoxSrs = msStrdup(pszBBOXSRS);

      /* On WFS 2.0.0, if the BBOX has no explicit SRS, use the map SRS */
      /* Should likely be used for WFS 1.1.0 too, but don't want to cause */
      /* issue at that point, since it can influence axis ordering */
      if (nWFSVersion >= OWS_2_0_0 && sBBoxSrs == NULL) {
        projectionObj sProjTmp;

        msInitProjection(&sProjTmp);
        msProjectionInheritContextFrom(&sProjTmp, &(map->projection));
        msOWSGetEPSGProj(&sProjTmp, &(map->web.metadata), "FO", MS_TRUE,
                         &sBBoxSrs);
        msFreeProjection(&sProjTmp);
      }

      if (sBBoxSrs) {
        int status;
        projectionObj sProjTmp;

        msInitProjection(&sProjTmp);
        msProjectionInheritContextFrom(&sProjTmp, &(map->projection));
        /*do the axis order for now. It is unclear if the bbox are expected
          ro respect the axis order defined in the projectsion #3296*/

        if (nWFSVersion >= OWS_1_1_0) {
          if ((status = msLoadProjectionStringEPSG(&sProjTmp, sBBoxSrs)) == 0) {
            msAxisNormalizePoints(&sProjTmp, 1, &bbox.minx, &bbox.miny);
            msAxisNormalizePoints(&sProjTmp, 1, &bbox.maxx, &bbox.maxy);
          }
        } else
          status = msLoadProjectionString(&sProjTmp, sBBoxSrs);

        if (status == 0 && map->projection.numargs > 0)
          msProjectRect(&sProjTmp, &map->projection, &bbox);
        msFreeProjection(&sProjTmp);

        msFree(sBBoxSrs);
        sBBoxSrs = NULL;
      }
      map->query.type = MS_QUERY_BY_RECT; /* setup the query */
      map->query.mode = MS_QUERY_MULTIPLE;
      map->query.rect = bbox;

      /*
        Retaining this block of code in case we want to setup a rendering path
        through the query code at some point.
      */
      /* if(map->outputformat && MS_DRIVER_MVT(map->outputformat)) {
        const char *mvt_buffer = msGetOutputFormatOption(map->outputformat,
      "EDGE_BUFFER", "10"); int buffer = MS_ABS(atoi(mvt_buffer)); double res =
      (bbox.maxx - bbox.minx)/(double)map->width; bbox.minx -= buffer * res;
        bbox.maxx += buffer * res;
        res = (bbox.maxy - bbox.miny)/(double)map->height;
        bbox.miny -= buffer * res;
        bbox.maxy += buffer * res;
        map->width += buffer*2;
        map->height += buffer*2;
        msCalculateScale(bbox,map->units,map->width,map->height,
      map->resolution, &map->scaledenom); map->query.rect = bbox;
      } */

      if (msQueryByRect(map) != MS_SUCCESS) {
        errorObj *ms_error;
        ms_error = msGetErrorObj();

        if (ms_error->code != MS_NOTFOUND) {
          msSetError(MS_WFSERR, "ms_error->code not found",
                     "msWFSGetFeature()");
          return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                                paramsObj->pszVersion);
        }
      }
    }
  }

  /* Count total number of features retrieved */
  for (j = 0; j < map->numlayers; j++) {
    if (GET_LAYER(map, j)->resultcache &&
        GET_LAYER(map, j)->resultcache->numresults > 0) {
      iNumberOfFeatures += GET_LAYER(map, j)->resultcache->numresults;
      if (GET_LAYER(map, j)->resultcache->hasnext == MS_TRUE)
        anyLyrHasNext = MS_TRUE;
    }
  }

  /* If maxfeatures is set, we have actually asked for 1 more feature than asked
   */
  /* to be able to know if there are next features. So it is now time to */
  /* remove this extra unasked feature from the result cache */
  if (maxfeatures >= 0 && iNumberOfFeatures == maxfeatures + 1) {
    int lastJ = -1;
    for (j = 0; j < map->numlayers; j++) {
      if (GET_LAYER(map, j)->resultcache &&
          GET_LAYER(map, j)->resultcache->numresults > 0) {
        lastJ = j;
      }
    }
    GET_LAYER(map, lastJ)->resultcache->numresults--;
    GET_LAYER(map, lastJ)->resultcache->bounds =
        GET_LAYER(map, lastJ)->resultcache->previousBounds;
    iNumberOfFeatures--;
    if (pnHasNext)
      *pnHasNext = MS_TRUE;
  } else if (pnHasNext) {
    *pnHasNext = anyLyrHasNext;
  }

  *pnOutTotalFeatures = iNumberOfFeatures;

  return MS_SUCCESS;
}

/*
** msWFSParsePropertyNameOrSortBy()
*/
static char **msWFSParsePropertyNameOrSortBy(const char *pszPropertyName,
                                             int numlayers) {
  char **tokens = NULL;
  int nPropertyNames = 0;
  char **papszPropertyName = NULL;
  int i;

  if (pszPropertyName == NULL) {
    papszPropertyName = (char **)msSmallMalloc(sizeof(char *) * numlayers);
    for (i = 0; i < numlayers; i++) {
      papszPropertyName[i] = msStrdup("!");
    }
    return papszPropertyName;
  }

  if (!(pszPropertyName[0] == '(' || numlayers == 1)) {
    return NULL;
  }

  if (numlayers == 1 && pszPropertyName[0] != '(') {
    /* Accept PROPERTYNAME without () when there is a single TYPENAME */
    std::string osTmpPropertyName;
    osTmpPropertyName = '(';
    osTmpPropertyName += pszPropertyName;
    osTmpPropertyName += ')';
    tokens = msStringSplit(osTmpPropertyName.c_str() + 1, '(', &nPropertyNames);
  } else
    tokens = msStringSplit(pszPropertyName + 1, '(', &nPropertyNames);

  /*expecting to always have a list of property names equal to
      the number of layers(typename)*/
  if (nPropertyNames != numlayers) {
    msFreeCharArray(tokens, nPropertyNames);
    return NULL;
  }

  papszPropertyName = (char **)msSmallMalloc(sizeof(char *) * nPropertyNames);
  for (i = 0; i < nPropertyNames; i++) {
    if (strlen(tokens[i]) > 0) {
      papszPropertyName[i] = msStrdup(tokens[i]);
      /* remove trailing ) */
      papszPropertyName[i][strlen(papszPropertyName[i]) - 1] = '\0';
    } else {
      for (i--; i >= 0; i--)
        msFree(papszPropertyName[i]);
      msFree(papszPropertyName);
      msFreeCharArray(tokens, nPropertyNames);
      return NULL;
    }
  }

  msFreeCharArray(tokens, nPropertyNames);

  return papszPropertyName;
}

static void msWFSInitGMLInfo(WFSGMLInfo *pgmlinfo) {
  memset(pgmlinfo, 0, sizeof(WFSGMLInfo));
  pgmlinfo->user_namespace_prefix = MS_DEFAULT_NAMESPACE_PREFIX;
  pgmlinfo->user_namespace_uri = MS_DEFAULT_NAMESPACE_URI;
  pgmlinfo->collection_name = OWS_WFS_FEATURE_COLLECTION_NAME;
  pgmlinfo->_typename = "";
  pgmlinfo->output_mime_type = "text/xml";
  pgmlinfo->output_schema_format = "XMLSCHEMA";
}

static void msWFSCleanupGMLInfo(WFSGMLInfo *pgmlinfo) {
  free(pgmlinfo->script_url);
  free(pgmlinfo->script_url_encoded);
  msFree(pgmlinfo->user_namespace_uri_encoded);
}

static int msWFSGetGMLOutputFormat(wfsParamsObj *paramsObj,
                                   WFSGMLInfo *pgmlinfo, int nWFSVersion) {
  OWSGMLVersion outputformat = OWS_GML2;

  /* Validate outputformat */
  if (paramsObj->pszOutputFormat) {
    /* We support GML2, GML3, GML3.2 for now. */
    if (strcasecmp(paramsObj->pszOutputFormat, "GML2") == 0 ||
        strcasecmp(paramsObj->pszOutputFormat, "text/xml; subtype=gml/2.1.2") ==
            0) {
      outputformat = OWS_GML2;
      pgmlinfo->output_schema_format = "XMLSCHEMA";
      /* FIXME? : subtype=gml/XXXX is invalid without quoting. Seen with CITE
       * WFS 2.0 */
      pgmlinfo->output_mime_type = "text/xml; subtype=gml/2.1.2";
    } else if (strcasecmp(paramsObj->pszOutputFormat, "GML3") == 0 ||
               strcasecmp(paramsObj->pszOutputFormat,
                          "text/xml; subtype=gml/3.1.1") == 0) {
      outputformat = OWS_GML3;
      pgmlinfo->output_schema_format = "SFE_XMLSCHEMA";
      /* FIXME? : subtype=gml/XXXX is invalid without quoting. Seen with CITE
       * WFS 2.0 */
      pgmlinfo->output_mime_type = "text/xml; subtype=gml/3.1.1";
    } else if (strcasecmp(paramsObj->pszOutputFormat, "GML32") == 0 ||
               strcasecmp(paramsObj->pszOutputFormat,
                          "text/xml; subtype=gml/3.2.1") == 0 ||
               strcasecmp(paramsObj->pszOutputFormat,
                          "text/xml; subtype=\"gml/3.2.1\"") == 0 ||
               strcasecmp(paramsObj->pszOutputFormat,
                          "application/gml+xml; version=3.2") == 0) {
      outputformat = OWS_GML32;
      pgmlinfo->output_schema_format =
          "application%2Fgml%2Bxml%3B%20version%3D3.2";
      pgmlinfo->output_mime_type = "text/xml; subtype=\"gml/3.2.1\"";
    } else {
      return -1;
    }

    /* If OUTPUTFORMAT not set, default to gml */
  } else {
    /*set the output format using the version if available*/
    if (nWFSVersion == OWS_1_1_0) {
      outputformat = OWS_GML3;
      pgmlinfo->output_schema_format = "text/xml;%20subtype=gml/3.1.1";
      /* FIXME? : subtype=gml/XXXX is invalid without quoting. Seen with CITE
       * WFS 2.0 */
      pgmlinfo->output_mime_type = "text/xml; subtype=gml/3.1.1";
    } else if (nWFSVersion >= OWS_2_0_0) {
      outputformat = OWS_GML32;
      pgmlinfo->output_schema_format =
          "application%2Fgml%2Bxml%3B%20version%3D3.2";
      pgmlinfo->output_mime_type = "text/xml; subtype=\"gml/3.2.1\"";
    }
  }

  if (nWFSVersion == OWS_1_0_0) {
    pgmlinfo->output_mime_type = "text/xml";
  }

  return outputformat;
}

static outputFormatObj *msWFSGetOtherOutputFormat(mapObj *map,
                                                  wfsParamsObj *paramsObj) {
  const char *format_list;
  hashTableObj *md;
  outputFormatObj *psFormat = NULL;
  int j;

  /* validate selected format against all selected layers. */
  for (j = 0; j < map->numlayers; j++) {
    layerObj *lp;

    lp = GET_LAYER(map, j);

    if (lp->status != MS_ON)
      continue;

    md = &(lp->metadata);
    format_list = msOWSLookupMetadata(md, "F", "getfeature_formatlist");
    if (format_list == NULL) {
      md = &(map->web.metadata);
      format_list = msOWSLookupMetadata(md, "F", "getfeature_formatlist");
    }
    if (format_list) {
      psFormat = msOwsIsOutputFormatValid(map, paramsObj->pszOutputFormat, md,
                                          "F", "getfeature_formatlist");
    }
    if (psFormat == NULL) {
      msSetError(MS_WFSERR,
                 "'%s' is not a permitted output format for layer '%s', review "
                 "wfs_getfeature_formatlist setting.",
                 "msWFSGetFeature()", paramsObj->pszOutputFormat, lp->name);
      return NULL;
    }

    if (psFormat->imagemode != MS_IMAGEMODE_FEATURE) {
      msSetError(MS_WFSERR,
                 "OUTPUTFORMAT '%s' does not have IMAGEMODE FEATURE, and is "
                 "not permitted for WFS output.",
                 "msWFSGetFeature()", paramsObj->pszOutputFormat);
      return NULL;
    }
  }

  return psFormat;
}

static void msWFSAnalyzeStartIndexAndFeatureCount(mapObj *map,
                                                  const wfsParamsObj *paramsObj,
                                                  int bIsHits,
                                                  int *pmaxfeatures,
                                                  int *pstartindex) {
  const char *tmpmaxfeatures = NULL;
  int maxfeatures = -1, startindex = -1;
  int j;

  int nQueriedLayers = 0;
  layerObj *lpQueried = NULL;

  tmpmaxfeatures =
      msOWSLookupMetadata(&(map->web.metadata), "FO", "maxfeatures");
  if (tmpmaxfeatures)
    maxfeatures = atoi(tmpmaxfeatures);

  if (bIsHits) {
    const char *ignoreMaxFeaturesForHits = msOWSLookupMetadata(
        &(map->web.metadata), "FO", "maxfeatures_ignore_for_resulttype_hits");

    /* For PostGIS where we have an efficient implementation of hits, default to
     * true */
    if (ignoreMaxFeaturesForHits == NULL) {
      int bHasEfficientHits = MS_TRUE;
      for (j = 0; j < map->numlayers; j++) {
        layerObj *lp;
        lp = GET_LAYER(map, j);
        if (lp->status == MS_ON) {
          if (lp->connectiontype != MS_POSTGIS) {
            bHasEfficientHits = MS_FALSE;
            break;
          }
        }
      }

      if (bHasEfficientHits)
        ignoreMaxFeaturesForHits = "true";
    }

    if (ignoreMaxFeaturesForHits != NULL &&
        strcasecmp(ignoreMaxFeaturesForHits, "true") == 0)
      maxfeatures = -1;
  }

  if (paramsObj->nMaxFeatures >= 0) {
    if (maxfeatures < 0 ||
        (maxfeatures > 0 && paramsObj->nMaxFeatures < maxfeatures))
      maxfeatures = paramsObj->nMaxFeatures;
  }

  nQueriedLayers = 0;
  for (j = 0; j < map->numlayers; j++) {
    layerObj *lp;
    lp = GET_LAYER(map, j);
    if (lp->status == MS_ON) {
      /* No reason to handle tolerances for WFS GetFeature */
      lp->tolerance = 0;
      lpQueried = GET_LAYER(map, j);
      nQueriedLayers++;
    }
  }

  /* WFS convention is that STARTINDEX=0 means the first feature, whereas */
  /* in MapServer internals we used another interpretation with STARTINDEX=1 */
  /* being the first index. This was before that the SWG WFS clarified things */
  /* hence the mess. Ultimately we should likely fix our internals to avoid */
  /* possible confusion */
  if (paramsObj->nStartIndex >= 0) {
    startindex = 1 + paramsObj->nStartIndex;
    map->query.startindex = startindex;
  }

  /* maxfeatures set */
  if (maxfeatures >= 0) {
    int extrafeature = 1;
    for (j = 0; j < map->numlayers; j++) {
      layerObj *lp;
      lp = GET_LAYER(map, j);
      if (lp->status == MS_ON) {
        /*over-ride the value only if it is unset or wfs maxfeatures is
          lower that what is currently set*/
        if (lp->maxfeatures <= 0 ||
            (lp->maxfeatures > 0 && maxfeatures < lp->maxfeatures)) {
          /* TODO: We don't handle DESC sorting, as it would mean to be */
          /* able to evict the first property, which mapquery cannot handle */
          /* This would have impact on the resultcache.bounds */
          if (lp->sortBy.nProperties > 0) {
            int k;
            int countDesc = 1;
            for (k = 0; k < lp->sortBy.nProperties; k++) {
              if (lp->sortBy.properties[k].sortOrder == SORT_DESC)
                countDesc++;
            }
            if (countDesc > 0)
              extrafeature = 0;
          }

          /* + 1 to be able to detect if there are more features for a next
           * request */
          lp->maxfeatures = maxfeatures + extrafeature;
        }
      }
    }
    /* + 1 to be able to detect if there are more features for a next request */
    map->query.maxfeatures = maxfeatures + extrafeature;
  }

  /* startindex set */
  if (startindex > 0 && nQueriedLayers > 1) {
    for (j = 0; j < map->numlayers; j++) {
      layerObj *lp;
      lp = GET_LAYER(map, j);
      if (lp->status == MS_ON) {
        msLayerEnablePaging(lp, MS_FALSE);
      }
    }
  } else if (startindex > 0 && lpQueried) {
    lpQueried->startindex = startindex;
  }

  if (pmaxfeatures)
    *pmaxfeatures = maxfeatures;
  if (pstartindex)
    *pstartindex = startindex;
}

static int msWFSAnalyzeBBOX(mapObj *map, wfsParamsObj *paramsObj,
                            rectObj *pbbox, char **pszBBoxSRS) {
  /* Default filter is map extents */
  *pbbox = map->extent;

  if (paramsObj->pszBbox) {
    char **tokens;
    int n;

    tokens = msStringSplit(paramsObj->pszBbox, ',', &n);
    if (tokens == NULL || (n != 4 && n != 5)) {
      msSetError(MS_WFSERR, "Wrong number of arguments for BBOX.",
                 "msWFSGetFeature()");
      msFreeCharArray(tokens, n);
      return msWFSException(map, "bbox", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }
    pbbox->minx = atof(tokens[0]);
    pbbox->miny = atof(tokens[1]);
    pbbox->maxx = atof(tokens[2]);
    pbbox->maxy = atof(tokens[3]);
    /*5th aregument is assumed to be projection*/
    if (n == 5)
      *pszBBoxSRS = msStrdup(tokens[4]);

    msFreeCharArray(tokens, n);
  }
  return 0;
}

static int msWFSComputeMatchingFeatures(mapObj *map, owsRequestObj *ows_request,
                                        wfsParamsObj *paramsObj,
                                        int iNumberOfFeatures, int maxfeatures,
                                        WFSGMLInfo *pgmlinfo, rectObj bbox,
                                        const char *sBBoxSrs, char **layers,
                                        int numlayers, int nWFSVersion) {
  int nMatchingFeatures = -1;

  if (nWFSVersion >= OWS_2_0_0) {
    /* If no features have been retrieved and there was no feature count limit,
     * then */
    /* it is obvious. We must test maxfeatures because if startindex is defined,
     */
    /* and above the number of matched features, iNumberOfFeatures can be 0. */
    if (iNumberOfFeatures == 0 && maxfeatures < 0) {
      nMatchingFeatures = 0;
    }

    /* In the case we had limited the query by a maximum number of features, and
     */
    /* that the query has returned less features than the limit, or if there was
     */
    /* no limit in feature count, we are able to determine the number of
     * matching
     */
    /* features */
    else if (iNumberOfFeatures > 0 &&
             (maxfeatures < 0 || iNumberOfFeatures < maxfeatures)) {
      if (paramsObj->nStartIndex >= 0)
        nMatchingFeatures = iNumberOfFeatures + paramsObj->nStartIndex;
      else
        nMatchingFeatures = iNumberOfFeatures;
    }

    /* Otherwise big hammer ! */
    else {
      /* The WFS 2.0 spec is not really clear on numberMatched behavior */
      /* and there are interesting logic in server implementations. */
      /* */
      /* Deegree
       * (http://deegree3-demo.deegree.org:80/inspire-workspace/services/wfs?)
       */
      /* will return numberMatched="19005" on the cp:CadastralParcel layer for a
       */
      /* resultType=hits request, whereas the server limitation is set to 15000
       */
      /* But on a regular GetFeature (without count specified), it will return
       */
      /* numberMatched="15000" (and numberReturned="15000")) */
      /* */
      /* GeoServer 2.4.1 will also ignore its server limitation for a
       * resultType=hits */
      /* but when using a regular GetFeature (without count specified), il will
       * return */
      /* numberMatched=numberReturned=total_number_of_features_without_taking_into_account_server_limit
       */
      /* but the number of actually returned features will be truncated to the
       * server */
      /* limit, likely a bug */
      /* */
      /* If wfs_compute_number_matched is set to TRUE, we will issue a full */
      /* count of potentially matching features, ignoring any client or server
       */
      /* side limits. */

      const char *pszComputeNumberMatched = msOWSLookupMetadata(
          &(map->web.metadata), "F", "compute_number_matched");
      if (pszComputeNumberMatched != NULL &&
          strcasecmp(pszComputeNumberMatched, "true") == 0) {
        int j;
        mapObj *mapTmp = (mapObj *)msSmallCalloc(1, sizeof(mapObj));
        if (initMap(mapTmp) == -1) {
          free(mapTmp);
          return 0;
        }
        msCopyMap(mapTmp, map);

        /* Re-run the query but with no limit */
        mapTmp->query.maxfeatures = -1;
        mapTmp->query.startindex = -1;
        mapTmp->query.only_cache_result_count = MS_TRUE;
        for (j = 0; j < mapTmp->numlayers; j++) {
          layerObj *lp = GET_LAYER(mapTmp, j);
          /* Reset layer paging */
          lp->maxfeatures = -1;
          lp->startindex = -1;
        }

        nMatchingFeatures = 0;
        msWFSRetrieveFeatures(
            mapTmp, ows_request, paramsObj, pgmlinfo, paramsObj->pszFilter,
            paramsObj->pszBbox != NULL, sBBoxSrs, bbox, paramsObj->pszFeatureId,
            layers, numlayers, -1, nWFSVersion, &nMatchingFeatures, NULL);

        msFreeMap(mapTmp);
      }
    }
  }

  return nMatchingFeatures;
}

static int msWFSResolveStoredQuery(mapObj *map, wfsParamsObj *paramsObj,
                                   cgiRequestObj *req) {
  if (paramsObj->pszStoredQueryId != NULL) {
    int i;
    int status;
    hashTableObj *hashTable = msCreateHashTable();
    char *pszResolvedQuery;

    if (req->NumParams > 0 && req->postrequest == NULL) {
      for (i = 0; i < req->NumParams; i++) {
        if (req->ParamNames[i] && req->ParamValues[i]) {
          char *pszXMLValue = CPLEscapeString(
              req->ParamValues[i], strlen(req->ParamValues[i]), CPLES_XML);
          msInsertHashTable(hashTable, req->ParamNames[i], pszXMLValue);
          CPLFree(pszXMLValue);
        }
      }
    }

    pszResolvedQuery = msWFSGetResolvedStoredQuery20(
        map, paramsObj, paramsObj->pszStoredQueryId, hashTable);
    msFreeHashTable(hashTable);

    if (pszResolvedQuery == NULL)
      return MS_FAILURE;

    status = msWFSAnalyzeStoredQuery(
        map, paramsObj, paramsObj->pszStoredQueryId, pszResolvedQuery);
    msFree(pszResolvedQuery);

    if (status != MS_SUCCESS)
      return status;

    msWFSSimplifyPropertyNameAndFilter(paramsObj);
  }
  return MS_SUCCESS;
}

/*
** msWFSUnaliasItem()
*/
static const char *msWFSUnaliasItem(layerObj *lp, const char *name) {
  const char *pszFullName;
  char szTmp[256];
  int z;
  for (z = 0; z < lp->numitems; z++) {
    if (!lp->items[z] || strlen(lp->items[z]) <= 0)
      continue;
    snprintf(szTmp, sizeof(szTmp), "%s_alias", lp->items[z]);
    pszFullName = msOWSLookupMetadata(&(lp->metadata), "G", szTmp);
    if (pszFullName && strcmp(name, pszFullName) == 0)
      return lp->items[z];
  }
  return name;
}

/*
** msWFSIsAllowedItem()
*/
static int msWFSIsAllowedItem(gmlItemListObj *itemList, const char *name) {
  int z;
  for (z = 0; z < itemList->numitems; z++) {
    if (itemList->items[z].visible &&
        strcasecmp(name, itemList->items[z].name) == 0) {
      return MS_TRUE;
    }
  }
  return MS_FALSE;
}

/*
** msWFSUngroupItem()
*/
static const char *msWFSUngroupItem(layerObj *lp, gmlGroupListObj *groupList,
                                    const char *name, int *pnGroupIndex) {
  int z;

  *pnGroupIndex = -1;
  for (z = 0; z < groupList->numgroups; z++) {
    const char *pszGroupName = groupList->groups[z].name;
    size_t nGroupNameLen = strlen(pszGroupName);

    /* Is it a group name ? */
    if (strcasecmp(name, pszGroupName) == 0) {
      *pnGroupIndex = z;
      return NULL;
    }

    /* Is it an item of a group ? */
    if (strncasecmp(name, pszGroupName, nGroupNameLen) == 0 &&
        name[nGroupNameLen] == '/') {

      int w;
      const char *pszSubName = msWFSStripNS(name + nGroupNameLen + 1);
      pszSubName = msWFSUnaliasItem(lp, pszSubName);
      for (w = 0; w < groupList->groups[z].numitems; w++) {
        if (strcasecmp(pszSubName, groupList->groups[z].items[w]) == 0) {
          return pszSubName;
        }
      }
    }
  }

  return name;
}

/*
** msWFSApplySortBy()
*/
static int msWFSApplySortBy(mapObj *map, wfsParamsObj *paramsObj, layerObj *lp,
                            const char *pszSortBy, gmlItemListObj *itemList,
                            gmlGroupListObj *groupList) {
  int y, n;
  char **tokens;
  int invalidSortBy = MS_FALSE;
  sortByClause sortBy;

  if (!msLayerSupportsSorting(lp)) {
    msSetError(MS_WFSERR, "Layer %s does not support sorting",
               "msWFSGetFeature()", lp->name);
    return msWFSException(map, "mapserv",
                          MS_WFS_ERROR_OPERATION_PROCESSING_FAILED,
                          paramsObj->pszVersion);
  }

  tokens = msStringSplit(pszSortBy, ',', &n);
  sortBy.nProperties = n;
  sortBy.properties =
      (sortByProperties *)msSmallMalloc(n * sizeof(sortByProperties));
  for (y = 0; y < n; y++) {
    char *pszSpace;
    int nGroupIndex = -1;
    const char *pszSortProperty;
    char *pszTmp;

    sortBy.properties[y].item = msStrdup(tokens[y]);
    sortBy.properties[y].sortOrder = SORT_ASC;
    pszSpace = strchr(sortBy.properties[y].item, ' ');
    if (pszSpace) {
      *pszSpace = '\0';
      if (strcasecmp(pszSpace + 1, "A") == 0 ||
          strcasecmp(pszSpace + 1, "ASC") == 0)
        ;
      else if (strcasecmp(pszSpace + 1, "D") == 0 ||
               strcasecmp(pszSpace + 1, "DESC") == 0)
        sortBy.properties[y].sortOrder = SORT_DESC;
      else
        invalidSortBy = MS_TRUE;
    }

    pszSortProperty = msWFSStripNS(sortBy.properties[y].item);
    pszSortProperty = msWFSUnaliasItem(lp, pszSortProperty);
    pszSortProperty =
        msWFSUngroupItem(lp, groupList, pszSortProperty, &nGroupIndex);
    if (nGroupIndex >= 0)
      invalidSortBy = MS_TRUE;

    if (!msWFSIsAllowedItem(itemList, pszSortProperty))
      invalidSortBy = MS_TRUE;

    pszTmp = msStrdup(pszSortProperty);
    msFree(sortBy.properties[y].item);
    sortBy.properties[y].item = pszTmp;
  }
  msFreeCharArray(tokens, n);

  if (!invalidSortBy)
    msLayerSetSort(lp, &sortBy);

  for (y = 0; y < n; y++) {
    msFree(sortBy.properties[y].item);
  }
  msFree(sortBy.properties);

  if (invalidSortBy) {
    msSetError(MS_WFSERR, "Invalid SORTBY clause", "msWFSGetFeature()");
    return msWFSException(map, "sortby", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  return MS_SUCCESS;
}

static void msWFSSetShapeCache(mapObj *map) {
  const char *pszFeaturesCacheCount =
      msOWSLookupMetadata(&(map->web.metadata), "F", "features_cache_count");
  const char *pszFeaturesCacheSize =
      msOWSLookupMetadata(&(map->web.metadata), "F", "features_cache_size");
  if (pszFeaturesCacheCount) {
    map->query.cache_shapes = MS_TRUE;
    map->query.max_cached_shape_count = atoi(pszFeaturesCacheCount);
    if (map->debug >= MS_DEBUGLEVEL_V) {
      msDebug("Caching up to %d shapes\n", map->query.max_cached_shape_count);
    }
  }

  if (pszFeaturesCacheSize) {
    map->query.cache_shapes = MS_TRUE;
    map->query.max_cached_shape_ram_amount = atoi(pszFeaturesCacheSize);
    if (strstr(pszFeaturesCacheSize, "mb") ||
        strstr(pszFeaturesCacheSize, "MB"))
      map->query.max_cached_shape_ram_amount *= 1024 * 1024;
    if (map->debug >= MS_DEBUGLEVEL_V) {
      msDebug("Caching up to %d bytes of shapes\n",
              map->query.max_cached_shape_ram_amount);
    }
  }
}

/*
** msWFSGetFeature()
*/
static int msWFSGetFeature(mapObj *map, wfsParamsObj *paramsObj,
                           cgiRequestObj *req, owsRequestObj *ows_request,
                           int nWFSVersion) {
  int status;
  int maxfeatures = -1, startindex = -1;
  rectObj bbox;

  char **layers = NULL;
  int numlayers = 0;

  char *sBBoxSrs = NULL;

  WFSGMLInfo gmlinfo;

  OWSGMLVersion outputformat = OWS_GML2; /* default output is GML 2.1 */
  outputFormatObj *psFormat = NULL;

  int iNumberOfFeatures = 0;
  int iResultTypeHits = 0;
  int nMatchingFeatures = -1;
  int bHasNextFeatures = MS_FALSE;

  char **papszGMLGroups = NULL;
  char **papszGMLIncludeItems = NULL;
  char **papszGMLGeometries = NULL;

  msIOContext *old_context = NULL;

  /* Initialize gml options */
  msWFSInitGMLInfo(&gmlinfo);

  if (paramsObj->pszResultType != NULL) {
    if (strcasecmp(paramsObj->pszResultType, "hits") == 0)
      iResultTypeHits = 1;
  }

  status = msWFSResolveStoredQuery(map, paramsObj, req);
  if (status != MS_SUCCESS)
    return status;

  /* typename is mandatory unless featureid is specified. We do not
     support featureid */
  if (paramsObj->pszTypeName == NULL && paramsObj->pszFeatureId == NULL) {
    msSetError(MS_WFSERR, "Incomplete WFS request: %s parameter missing",
               "msWFSGetFeature()",
               (nWFSVersion >= OWS_2_0_0) ? "TYPENAMES" : "TYPENAME");
    return msWFSException(
        map, (nWFSVersion >= OWS_2_0_0) ? "typenames" : "typename",
        MS_OWS_ERROR_MISSING_PARAMETER_VALUE, paramsObj->pszVersion);
  }

  /* Is it a WFS 2.0 GetFeatureById stored query with an unknown id ? */
  /* If so, CITE interprets the spec as requesting to issue a
   * OperationProcessingFailed */
  /* exception. But it only checks that the HTTP error code is 403 or 404. So
   * emit 404. */
  /* A bit strange when a similar request but with RESOURCEID= should */
  /* produce an empty FeatureCollection */
  if (nWFSVersion >= OWS_2_0_0 && paramsObj->pszTypeName != NULL &&
      strcmp(paramsObj->pszTypeName, "?") == 0 &&
      paramsObj->pszFilter != NULL && paramsObj->pszFeatureId == NULL) {
    CPLXMLNode *psDoc;

    psDoc = CPLParseXMLString(paramsObj->pszFilter);
    if (psDoc != NULL) {
      const char *rid;

      CPLStripXMLNamespace(psDoc, NULL, 1);
      rid = CPLGetXMLValue(psDoc, "=Filter.ResourceId.rid", NULL);
      if (rid != NULL) {
        msSetError(MS_WFSERR, "Invalid rid '%s'", "msWFSGetFeature()", rid);
        CPLDestroyXMLNode(psDoc);
        return msWFSException(map, NULL, MS_OWS_ERROR_NOT_FOUND,
                              paramsObj->pszVersion);
      }
      CPLDestroyXMLNode(psDoc);
    }
  }

  papszGMLGroups = (char **)calloc(map->numlayers, sizeof(char *));
  papszGMLIncludeItems = (char **)calloc(map->numlayers, sizeof(char *));
  papszGMLGeometries = (char **)calloc(map->numlayers, sizeof(char *));

  if (paramsObj->pszTypeName) {
    int k, y, z;

    char **tokens;
    int n = 0, i = 0;
    char **papszPropertyName = NULL;
    char **papszSortBy = NULL;

    /* keep a ref for layer use. */
    gmlinfo._typename = paramsObj->pszTypeName;

    /* Parse comma-delimited list of type names (layers) */
    /*  */
    /* __TODO__ Need to handle type grouping, e.g. "(l1,l2),l3,l4" */
    /*  */
    layers = msStringSplit(gmlinfo._typename, ',', &numlayers);

    /* ==================================================================== */
    /*      TODO: check if the typename contains namespaces (ex cdf:Other), */
    /*      If that is the case extract only the layer name.                */
    /* ==================================================================== */

    if (layers == NULL || numlayers < 1) {
      msSetError(MS_WFSERR, "At least one type name required in %s parameter.",
                 "msWFSGetFeature()",
                 (nWFSVersion >= OWS_2_0_0) ? "TYPENAMES" : "TYPENAME");
      return msWFSException(
          map, (nWFSVersion >= OWS_2_0_0) ? "typenames" : "typename",
          MS_OWS_ERROR_INVALID_PARAMETER_VALUE, paramsObj->pszVersion);
    }

    /* strip namespace if there is one :ex TYPENAME=cdf:Other */
    for (i = 0; i < numlayers; i++) {
      char *pszTmp = msStrdup(msWFSStripNS(layers[i]));
      free(layers[i]);
      layers[i] = pszTmp;
    }

    /* Keep only selected layers, set to OFF by default. */
    msWFSTurnOffAllLayer(map);

    papszPropertyName =
        msWFSParsePropertyNameOrSortBy(paramsObj->pszPropertyName, numlayers);
    if (papszPropertyName == NULL) {
      msFreeCharArray(layers, numlayers);
      msFreeCharArray(papszGMLGroups, map->numlayers);
      msFreeCharArray(papszGMLIncludeItems, map->numlayers);
      msFreeCharArray(papszGMLGeometries, map->numlayers);
      msSetError(MS_WFSERR,
                 "Optional PROPERTYNAME parameter. A list of properties may be "
                 "specified for each type name. Example "
                 "TYPENAME=name1,name2&PROPERTYNAME=(prop1,prop2)(prop1)",
                 "msWFSGetFeature()");
      return msWFSException(map, "PROPERTYNAME",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }

    papszSortBy =
        msWFSParsePropertyNameOrSortBy(paramsObj->pszSortBy, numlayers);
    if (papszSortBy == NULL) {
      msFreeCharArray(layers, numlayers);
      msFreeCharArray(papszPropertyName, numlayers);
      msFreeCharArray(papszGMLGroups, map->numlayers);
      msFreeCharArray(papszGMLIncludeItems, map->numlayers);
      msFreeCharArray(papszGMLGeometries, map->numlayers);
      msSetError(
          MS_WFSERR,
          "Optional SORTBY parameter. A list may be specified for each type "
          "name. Example TYPENAME=name1,name2&SORTBY=(prop1,prop2)(prop1)",
          "msWFSGetFeature()");
      return msWFSException(map, "SORTBY", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }

    for (k = 0; k < numlayers; k++) {
      layerObj *lp;
      lp = msWFSGetLayerByName(map, ows_request, layers[k]);
      if (lp != NULL) {
        gmlItemListObj *itemList = NULL;
        gmlGeometryListObj *geometryList = NULL;
        gmlGroupListObj *groupList = NULL;

        lp->status = MS_ON;
        if (lp->_template == NULL) {
          /* Force setting a template to enable query. */
          lp->_template = msStrdup("ttt.html");
        }

        /*do an alias replace for the current layer*/
        if (msLayerOpen(lp) == MS_SUCCESS &&
            msLayerGetItems(lp) == MS_SUCCESS) {

          itemList = msGMLGetItems(lp, "G");
          groupList = msGMLGetGroups(lp, "G");

          if (strcmp(papszSortBy[k], "!") != 0) {
            status = msWFSApplySortBy(map, paramsObj, lp, papszSortBy[k],
                                      itemList, groupList);
            if (status != MS_SUCCESS) {
              msFreeCharArray(papszPropertyName, numlayers);
              msFreeCharArray(papszSortBy, numlayers);
              msFreeCharArray(layers, numlayers);
              msFreeCharArray(papszGMLGroups, map->numlayers);
              msFreeCharArray(papszGMLIncludeItems, map->numlayers);
              msFreeCharArray(papszGMLGeometries, map->numlayers);
              msGMLFreeItems(itemList);
              msGMLFreeGroups(groupList);
              return status;
            }
          }

          geometryList = msGMLGetGeometries(lp, "GFO", MS_TRUE);

          /* unalias, ungroup and validate that the property names passed are
           * part of the items list*/
          tokens = msStringSplit(papszPropertyName[k], ',', &n);
          for (y = 0; y < n; y++) {
            const char *pszPropertyNameItem = tokens[y];
            int nGroupIndex = -1;

            if (strcasecmp(pszPropertyNameItem, "*") == 0 ||
                strcasecmp(pszPropertyNameItem, "!") == 0)
              continue;

            pszPropertyNameItem = msWFSStripNS(pszPropertyNameItem);
            pszPropertyNameItem = msWFSUnaliasItem(lp, pszPropertyNameItem);
            pszPropertyNameItem = msWFSUngroupItem(
                lp, groupList, pszPropertyNameItem, &nGroupIndex);
            if (nGroupIndex >= 0)
              continue;

            /* Check that the property name is allowed (#3563) */
            /*we need to check of the property name is the geometry name; In
              that case it is a valid property name*/
            if (!msWFSIsAllowedItem(itemList, pszPropertyNameItem)) {
              for (z = 0; z < geometryList->numgeometries; z++) {
                if (strcasecmp(pszPropertyNameItem,
                               geometryList->geometries[z].name) == 0)
                  break;
              }

              if (z == geometryList->numgeometries) {
                msSetError(MS_WFSERR, "Invalid PROPERTYNAME %s",
                           "msWFSGetFeature()", tokens[y]);
                msFreeCharArray(tokens, n);
                msGMLFreeItems(itemList);
                msGMLFreeGroups(groupList);
                msGMLFreeGeometries(geometryList);
                msFreeCharArray(papszPropertyName, numlayers);
                msFreeCharArray(papszSortBy, numlayers);
                msFreeCharArray(layers, numlayers);
                msFreeCharArray(papszGMLGroups, map->numlayers);
                msFreeCharArray(papszGMLIncludeItems, map->numlayers);
                msFreeCharArray(papszGMLGeometries, map->numlayers);
                return msWFSException(map, "PROPERTYNAME",
                                      MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                                      paramsObj->pszVersion);
              }
            } else {
              char *pszTmp = msStrdup(pszPropertyNameItem);
              msFree(tokens[y]);
              tokens[y] = pszTmp;
            }
          }

          /* Add mandatory items that are not explicitly listed. */
          /* When the user specifies PROPERTYNAME, we might have to augment */
          /* the list of returned parameters so as to validate against the
           * schema. */
          /* This is made clear in the WFS 1.0.0, 1.1.0 and 2.0.0 specs (#3319)
           */
          for (z = 0; z < itemList->numitems; z++) {
            if (itemList->items[z].visible &&
                itemList->items[z].minOccurs == 1) {
              int bFound = MS_FALSE;
              for (y = 0; y < n; y++) {
                if (strcasecmp(tokens[y], "*") == 0 ||
                    strcasecmp(tokens[y], "!") == 0 ||
                    strcasecmp(tokens[y], itemList->items[z].name) == 0) {
                  bFound = MS_TRUE;
                  break;
                }
              }
              if (!bFound) {
                tokens = (char **)realloc(tokens, sizeof(char *) * (n + 1));
                tokens[n] = msStrdup(itemList->items[z].name);
                n++;
              }
            }
          }

          /* Rebuild papszPropertyName[k] */
          msFree(papszPropertyName[k]);
          papszPropertyName[k] = NULL;
          for (y = 0; y < n; y++) {
            if (y == 0)
              papszPropertyName[k] = msStrdup(tokens[y]);
            else {
              papszPropertyName[k] =
                  msStringConcatenate(papszPropertyName[k], ",");
              papszPropertyName[k] =
                  msStringConcatenate(papszPropertyName[k], tokens[y]);
            }
          }

          msFreeCharArray(tokens, n);
          msLayerClose(lp);

          if (strlen(papszPropertyName[k]) > 0) {

            if (strcasecmp(papszPropertyName[k], "*") == 0) {
              /* Add all non-excluded items, including optional ones */
              msFree(papszPropertyName[k]);
              papszPropertyName[k] = NULL;
              for (z = 0; z < itemList->numitems; z++) {
                if (itemList->items[z].visible) {
                  if (papszPropertyName[k] != NULL)
                    papszPropertyName[k] =
                        msStringConcatenate(papszPropertyName[k], ",");
                  papszPropertyName[k] = msStringConcatenate(
                      papszPropertyName[k], itemList->items[z].name);
                }
              }
              if (papszPropertyName[k])
                papszGMLIncludeItems[lp->index] =
                    msStrdup(papszPropertyName[k]);
              else
                papszGMLIncludeItems[lp->index] = msStrdup("");

              /* The user didn't specify explicitly PROPERTYNAME for this layer
               */
            } else if (strcasecmp(papszPropertyName[k], "!") == 0) {
              /* Add all non-excluded items, but only default and mandatory ones
               * (and geometry) */
              msFree(papszPropertyName[k]);
              papszPropertyName[k] = NULL;
              for (z = 0; z < itemList->numitems; z++) {
                if (itemList->items[z].visible &&
                    (itemList->items[z].outputByDefault == 1 ||
                     itemList->items[z].minOccurs == 1)) {
                  if (papszPropertyName[k] != NULL)
                    papszPropertyName[k] =
                        msStringConcatenate(papszPropertyName[k], ",");
                  papszPropertyName[k] = msStringConcatenate(
                      papszPropertyName[k], itemList->items[z].name);
                }
              }
              if (papszPropertyName[k])
                papszGMLIncludeItems[lp->index] =
                    msStrdup(papszPropertyName[k]);
              else
                papszGMLIncludeItems[lp->index] = msStrdup("");

            } else {
              char *pszGeometryList = NULL;

              for (z = 0; z < groupList->numgroups; z++) {
                const char *pszNeedle =
                    strstr(papszPropertyName[k], groupList->groups[z].name);
                char chAfterNeedle = 0;
                if (pszNeedle != NULL)
                  chAfterNeedle =
                      papszPropertyName[k][strlen(groupList->groups[z].name)];
                if (pszNeedle != NULL &&
                    (chAfterNeedle == '\0' || chAfterNeedle == ',')) {
                  int w;
                  for (w = 0; w < groupList->groups[z].numitems; w++) {
                    if (strstr(papszPropertyName[k],
                               groupList->groups[z].items[w]) == NULL) {
                      papszPropertyName[k] =
                          msStringConcatenate(papszPropertyName[k], ",");
                      papszPropertyName[k] = msStringConcatenate(
                          papszPropertyName[k], groupList->groups[z].items[w]);
                    }
                  }
                }
              }

              // Set the "gml_select_items" metadata items that is used by
              // msQueryByRect() to restrict the number of properties to
              // select for faster results.
              if (msOWSLookupMetadata(&(lp->metadata), "OFG", "groups") ==
                  NULL) {
                auto properties = msStringSplit(papszPropertyName[k], ',');
                std::string selectItems;
                const char *featureid =
                    msOWSLookupMetadata(&(lp->metadata), "OFG", "featureid");
                bool foundFeatureId = false;
                for (const auto &prop : properties) {
                  bool isGeom = false;
                  const char *propNoNS = prop.c_str();
                  const char *pszColon = strchr(propNoNS, ':');
                  if (pszColon)
                    propNoNS = pszColon + 1;
                  for (z = 0; z < geometryList->numgeometries; z++) {
                    if (strcasecmp(propNoNS,
                                   geometryList->geometries[z].name) == 0) {
                      isGeom = true;
                      break;
                    }
                  }
                  if (!isGeom) {
                    if (!selectItems.empty())
                      selectItems += ',';
                    selectItems += prop;
                  }
                  if (featureid && featureid == prop) {
                    foundFeatureId = true;
                  }
                }
                if (featureid && !foundFeatureId) {
                  if (!selectItems.empty())
                    selectItems += ',';
                  selectItems += featureid;
                }
                if (!selectItems.empty()) {
                  msInsertHashTable(&(lp->metadata), "gml_select_items",
                                    selectItems.c_str());
                }
              }

              papszGMLIncludeItems[lp->index] = msStrdup(papszPropertyName[k]);

              for (z = 0; z < geometryList->numgeometries; z++) {
                if (strstr(papszPropertyName[k],
                           geometryList->geometries[z].name) != NULL) {
                  if (pszGeometryList != NULL)
                    pszGeometryList = msStringConcatenate(pszGeometryList, ",");
                  pszGeometryList = msStringConcatenate(
                      pszGeometryList, geometryList->geometries[z].name);
                }
              }

              if (pszGeometryList != NULL) {
                papszGMLGeometries[lp->index] = msStrdup(pszGeometryList);
                msFree(pszGeometryList);
              } else {
                papszGMLGeometries[lp->index] = msStrdup("none");
              }
            }
          } else { /*empty string*/
            papszGMLGeometries[lp->index] = msStrdup("none");
          }
        } else {
          msFreeCharArray(papszPropertyName, numlayers);
          msFreeCharArray(papszSortBy, numlayers);
          msFreeCharArray(layers, numlayers);
          msFreeCharArray(papszGMLGroups, map->numlayers);
          msFreeCharArray(papszGMLIncludeItems, map->numlayers);
          msFreeCharArray(papszGMLGeometries, map->numlayers);
          msGMLFreeItems(itemList);
          msGMLFreeGroups(groupList);
          msGMLFreeGeometries(geometryList);
          return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                                paramsObj->pszVersion);
        }

        msGMLFreeItems(itemList);
        msGMLFreeGroups(groupList);
        msGMLFreeGeometries(geometryList);
      } else {
        /* Requested layer name was not in capabilities:
         * either it just doesn't exist
         */
        msSetError(MS_WFSERR,
                   "TYPENAME '%s' doesn't exist in this server.  Please check "
                   "the capabilities and reformulate your request.",
                   "msWFSGetFeature()", layers[k]);
        msFreeCharArray(papszPropertyName, numlayers);
        msFreeCharArray(papszSortBy, numlayers);
        msFreeCharArray(layers, numlayers);
        msFreeCharArray(papszGMLGroups, map->numlayers);
        msFreeCharArray(papszGMLIncludeItems, map->numlayers);
        msFreeCharArray(papszGMLGeometries, map->numlayers);
        return msWFSException(map, "typename",
                              MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                              paramsObj->pszVersion);
      }
    }

    msFreeCharArray(papszPropertyName, numlayers);
    msFreeCharArray(papszSortBy, numlayers);
  }

  /* Validate outputformat */
  status = msWFSGetGMLOutputFormat(paramsObj, &gmlinfo, nWFSVersion);
  if (status < 0) {
    psFormat = msWFSGetOtherOutputFormat(map, paramsObj);
    if (psFormat == NULL) {
      msFreeCharArray(layers, numlayers);
      msFreeCharArray(papszGMLGroups, map->numlayers);
      msFreeCharArray(papszGMLIncludeItems, map->numlayers);
      msFreeCharArray(papszGMLGeometries, map->numlayers);
      return msWFSException(map, "outputformat",
                            MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                            paramsObj->pszVersion);
    }
    // only GML is supported for resultType=hits, so ignore any other
    // outputformat
    if (iResultTypeHits == 1) {
      psFormat = NULL;
    }
  } else {
    outputformat = (OWSGMLVersion)status;
  }

  msWFSAnalyzeStartIndexAndFeatureCount(map, paramsObj, iResultTypeHits,
                                        &maxfeatures, &startindex);

  status = msWFSAnalyzeBBOX(map, paramsObj, &bbox, &sBBoxSrs);
  if (status != 0) {
    msFreeCharArray(layers, numlayers);
    msFreeCharArray(papszGMLGroups, map->numlayers);
    msFreeCharArray(papszGMLIncludeItems, map->numlayers);
    msFreeCharArray(papszGMLGeometries, map->numlayers);
    return status;
  }

  if (iResultTypeHits == 1) {
    map->query.only_cache_result_count = MS_TRUE;
  } else {
    msWFSSetShapeCache(map);
  }

  status = msWFSRetrieveFeatures(
      map, ows_request, paramsObj, &gmlinfo, paramsObj->pszFilter,
      paramsObj->pszBbox != NULL, sBBoxSrs, bbox, paramsObj->pszFeatureId,
      layers, numlayers, maxfeatures, nWFSVersion, &iNumberOfFeatures,
      &bHasNextFeatures);
  if (status != MS_SUCCESS) {
    msFreeCharArray(layers, numlayers);
    msFree(sBBoxSrs);
    msFreeCharArray(papszGMLGroups, map->numlayers);
    msFreeCharArray(papszGMLIncludeItems, map->numlayers);
    msFreeCharArray(papszGMLGeometries, map->numlayers);
    return status;
  }

  /* ----------------------------------------- */
  /* Now compute nMatchingFeatures for WFS 2.0 */
  /* ----------------------------------------- */

  nMatchingFeatures = msWFSComputeMatchingFeatures(
      map, ows_request, paramsObj, iNumberOfFeatures, maxfeatures, &gmlinfo,
      bbox, sBBoxSrs, layers, numlayers, nWFSVersion);

  msFreeCharArray(layers, numlayers);

  msFree(sBBoxSrs);
  sBBoxSrs = NULL;

  /*
  ** GML Header generation.
  */

  status = MS_SUCCESS;

  if (psFormat == NULL) {
    if (paramsObj->countGetFeatureById == 1 && maxfeatures != 0 &&
        iResultTypeHits == 0) {
      /* When there's a single  urn:ogc:def:query:OGC-WFS::GetFeatureById
       * GetFeature request */
      /* we must not output a FeatureCollection but the object itself */
      /* We do that as a post-processing step, so let print into a buffer and
       * modify the */
      /* XML afterwards */
      old_context = msIO_pushStdoutToBufferAndGetOldContext();
    } else {
      msIO_setHeader("Content-Type", "%s; charset=UTF-8",
                     gmlinfo.output_mime_type);
      msIO_sendHeaders();
    }

    status = msWFSGetFeature_GMLPreamble(
        map, req, &gmlinfo, paramsObj, outputformat, iResultTypeHits,
        iNumberOfFeatures, nMatchingFeatures, maxfeatures, bHasNextFeatures,
        nWFSVersion);
    if (status != MS_SUCCESS) {
      if (old_context != NULL)
        msIO_restoreOldStdoutContext(old_context);
      msWFSCleanupGMLInfo(&gmlinfo);
      msFreeCharArray(papszGMLGroups, map->numlayers);
      msFreeCharArray(papszGMLIncludeItems, map->numlayers);
      msFreeCharArray(papszGMLGeometries, map->numlayers);
      return MS_FAILURE;
    }
  }

  {
    int i;
    for (i = 0; i < map->numlayers; i++) {
      layerObj *lp = GET_LAYER(map, i);
      if (papszGMLGroups[i])
        msInsertHashTable(&(lp->metadata), "GML_GROUPS", papszGMLGroups[i]);
      if (papszGMLIncludeItems[i])
        msInsertHashTable(&(lp->metadata), "GML_INCLUDE_ITEMS",
                          papszGMLIncludeItems[i]);
      if (papszGMLGeometries[i])
        msInsertHashTable(&(lp->metadata), "GML_GEOMETRIES",
                          papszGMLGeometries[i]);
    }
  }

  /* handle case of maxfeatures = 0 */
  /*internally use a start index that start with 0 as the first index*/
  if (psFormat == NULL) {
    if (maxfeatures != 0 && iResultTypeHits == 0) {
      int bWFS2MultipleFeatureCollection = MS_FALSE;

      /* Would make sense for WFS 1.1.0 too ! See #3576 */
      int bUseURN = (nWFSVersion == OWS_2_0_0);
      const char *useurn =
          msOWSLookupMetadata(&(map->web.metadata), "F", "return_srs_as_urn");
      if (useurn && strcasecmp(useurn, "true") == 0)
        bUseURN = 1;
      else if (useurn && strcasecmp(useurn, "false") == 0)
        bUseURN = 0;

      /* For WFS 2.0, when we request several types, we must present each type
       */
      /* in its own FeatureCollection (§ 11.3.3.5 ) */
      if (nWFSVersion >= OWS_2_0_0 && iResultTypeHits != 1) {
        int i;
        int nLayersWithFeatures = 0;
        for (i = 0; i < map->numlayers; i++) {
          layerObj *lp = GET_LAYER(map, i);
          if (lp->resultcache && lp->resultcache->numresults > 0)
            nLayersWithFeatures++;
        }
        if (nLayersWithFeatures > 1) {
          char timestring[100];
          resultCacheObj **saveResultCache = (resultCacheObj **)msSmallMalloc(
              map->numlayers * sizeof(resultCacheObj *));
          int iLastNonEmptyLayer = -1;

          msWFSGetFeature_GetTimeStamp(timestring, sizeof(timestring));

          /* Emit global bounds */
          msGMLWriteWFSBounds(map, stdout, "  ", outputformat, nWFSVersion,
                              bUseURN);

          /* Save the result cache that contains the features that we want to */
          /* emit in the response */
          for (i = 0; i < map->numlayers; i++) {
            layerObj *lp = GET_LAYER(map, i);
            saveResultCache[i] = lp->resultcache;
            if (lp->resultcache && lp->resultcache->numresults > 0) {
              iLastNonEmptyLayer = i;
            }
            lp->resultcache = NULL;
          }

          /* Just dump one layer at a time */
          for (i = 0; i < map->numlayers; i++) {
            layerObj *lp = GET_LAYER(map, i);
            lp->resultcache = saveResultCache[i];
            if (lp->resultcache && lp->resultcache->numresults > 0) {
              msIO_fprintf(stdout, "  <wfs:member>\n");
              msIO_fprintf(
                  stdout,
                  "   <wfs:FeatureCollection timeStamp=\"%s\" numberMatched=\"",
                  timestring);
              if (i < iLastNonEmptyLayer || nMatchingFeatures >= 0)
                msIO_fprintf(stdout, "%d", lp->resultcache->numresults);
              else
                msIO_fprintf(stdout, "unknown");
              msIO_fprintf(stdout, "\" numberReturned=\"%d\">\n",
                           lp->resultcache->numresults);

              msGMLWriteWFSQuery(map, stdout, gmlinfo.user_namespace_prefix,
                                 outputformat, nWFSVersion, bUseURN, MS_FALSE);
              msIO_fprintf(stdout, "   </wfs:FeatureCollection>\n");
              msIO_fprintf(stdout, "  </wfs:member>\n");
            }
            lp->resultcache = NULL;
          }

          /* Restore for later cleanup */
          for (i = 0; i < map->numlayers; i++) {
            layerObj *lp = GET_LAYER(map, i);
            lp->resultcache = saveResultCache[i];
          }
          msFree(saveResultCache);

          bWFS2MultipleFeatureCollection = MS_TRUE;
        }
      }

      if (!bWFS2MultipleFeatureCollection) {
        msGMLWriteWFSQuery(map, stdout, gmlinfo.user_namespace_prefix,
                           outputformat, nWFSVersion, bUseURN, MS_FALSE);
      }

      status = MS_SUCCESS;
    }
  } else {
    mapservObj *mapserv = msAllocMapServObj();

    /* Setup dummy mapserv object */
    mapserv->sendheaders = MS_TRUE;
    mapserv->map = map;
    msFreeCgiObj(mapserv->request);
    mapserv->request = req;
    map->querymap.status = MS_FALSE;

    if (nMatchingFeatures >= 0) {
      char szMatchingFeatures[12];
      snprintf(szMatchingFeatures, sizeof(szMatchingFeatures), "%d",
               nMatchingFeatures);
      msSetOutputFormatOption(psFormat, "_matching_features_",
                              szMatchingFeatures);
    } else {
      msSetOutputFormatOption(psFormat, "_matching_features_", "");
    }
    status = msReturnTemplateQuery(mapserv, psFormat->name, NULL);

    mapserv->request = NULL;
    mapserv->map = NULL;

    msFreeMapServObj(mapserv);

    if (status != MS_SUCCESS) {
      msFreeCharArray(papszGMLGroups, map->numlayers);
      msFreeCharArray(papszGMLIncludeItems, map->numlayers);
      msFreeCharArray(papszGMLGeometries, map->numlayers);
      return msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                            paramsObj->pszVersion);
    }
  }

  msFreeCharArray(papszGMLGroups, map->numlayers);
  msFreeCharArray(papszGMLIncludeItems, map->numlayers);
  msFreeCharArray(papszGMLGeometries, map->numlayers);

  if (psFormat == NULL && status == MS_SUCCESS) {
    msWFSGetFeature_GMLPostfix(&gmlinfo, outputformat, maxfeatures,
                               iResultTypeHits, iNumberOfFeatures, nWFSVersion);
  }

  /*Special case for a single urn:ogc:def:query:OGC-WFS::GetFeatureById
   * GetFeature request */
  if (old_context != NULL) {
    msIOContext *new_context;
    msIOBuffer *buffer;
    CPLXMLNode *psRoot;

    new_context = msIO_getHandler(stdout);
    buffer = (msIOBuffer *)new_context->cbData;
    psRoot = CPLParseXMLString((const char *)buffer->data);
    msIO_restoreOldStdoutContext(old_context);
    if (psRoot != NULL) {
      CPLXMLNode *psFeatureCollection =
          CPLGetXMLNode(psRoot, "=wfs:FeatureCollection");
      if (psFeatureCollection != NULL) {
        CPLXMLNode *psMember = CPLGetXMLNode(psFeatureCollection, "wfs:member");
        if (psMember != NULL && psMember->psChild != NULL) {
          CPLXMLNode *psIter;
          CPLXMLNode *psFeatureNode;
          char *pszTmpXML;

          /* Transfer all namespaces of FeatureCollection to the Feature */
          psFeatureNode = psMember->psChild;
          psIter = psFeatureCollection->psChild;
          while (psIter != NULL) {
            if (psIter->eType == CXT_Attribute &&
                (strncmp(psIter->pszValue, "xmlns:", strlen("xmlns:")) == 0 ||
                 strncmp(psIter->pszValue, "xsi:", strlen("xsi:")) == 0)) {
              CPLXMLNode *psIterNext = psIter->psNext;
              psIter->psNext = NULL;
              CPLAddXMLChild(psFeatureNode, CPLCloneXMLTree(psIter));
              psIter->psNext = psIterNext;
            }
            psIter = psIter->psNext;
          }

          pszTmpXML = CPLSerializeXMLTree(psFeatureNode);
          msIO_setHeader("Content-Type", "%s; charset=UTF-8",
                         gmlinfo.output_mime_type);
          msIO_sendHeaders();
          msIO_printf("<?xml version='1.0' encoding=\"UTF-8\" ?>\n");
          msIO_printf("%s", pszTmpXML);
          CPLFree(pszTmpXML);
        } else {
          status = msWFSException(map, NULL, MS_OWS_ERROR_NOT_FOUND,
                                  paramsObj->pszVersion);
        }
      }
      CPLDestroyXMLNode(psRoot);
    }
  }

  msWFSCleanupGMLInfo(&gmlinfo);

  return status;
}

/*
** msWFSGetPropertyValue()
*/
static int msWFSGetPropertyValue(mapObj *map, wfsParamsObj *paramsObj,
                                 cgiRequestObj *req, owsRequestObj *ows_request,
                                 int nWFSVersion) {
  int status;
  int maxfeatures = -1, startindex = -1;
  rectObj bbox;

  char *sBBoxSrs = NULL;

  WFSGMLInfo gmlinfo;

  OWSGMLVersion outputformat = OWS_GML2; /* default output is GML 2.1 */

  int iNumberOfFeatures = 0;
  int iResultTypeHits = 0;
  int nMatchingFeatures = -1;
  int bHasNextFeatures = MS_FALSE;

  const char *pszTypeName;
  layerObj *lp;

  char *pszGMLGroups = NULL;
  char *pszGMLIncludeItems = NULL;
  char *pszGMLGeometries = NULL;

  status = msWFSResolveStoredQuery(map, paramsObj, req);
  if (status != MS_SUCCESS)
    return status;

  if (paramsObj->pszTypeName == NULL) {
    msSetError(MS_WFSERR, "Incomplete WFS request: TYPENAMES parameter missing",
               "msWFSGetPropertyValue()");
    return msWFSException(map, "typenames",
                          MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  if (paramsObj->pszValueReference == NULL) {
    msSetError(MS_WFSERR,
               "Incomplete WFS request: VALUEREFERENCE parameter missing",
               "msWFSGetPropertyValue()");
    return msWFSException(map, "valuereference",
                          MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  /* Keep only selected layers, set to OFF by default. */
  msWFSTurnOffAllLayer(map);

  /* Remove namespace prefix */
  pszTypeName = msWFSStripNS(paramsObj->pszTypeName);

  lp = msWFSGetLayerByName(map, ows_request, pszTypeName);
  if (lp != NULL) {
    gmlItemListObj *itemList = NULL;
    gmlGeometryListObj *geometryList = NULL;
    gmlGroupListObj *groupList = NULL;

    lp->status = MS_ON;
    if (lp->_template == NULL) {
      /* Force setting a template to enable query. */
      lp->_template = msStrdup("ttt.html");
    }

    /*do an alias replace for the current layer*/
    if (msLayerOpen(lp) == MS_SUCCESS && msLayerGetItems(lp) == MS_SUCCESS) {
      const char *pszValueReference;
      int z;
      int nGroupIndex = -1;

      itemList = msGMLGetItems(lp, "G");
      groupList = msGMLGetGroups(lp, "G");

      if (paramsObj->pszSortBy != NULL &&
          strcmp(paramsObj->pszSortBy, "!") != 0) {
        status = msWFSApplySortBy(map, paramsObj, lp, paramsObj->pszSortBy,
                                  itemList, groupList);
        if (status != MS_SUCCESS) {
          msGMLFreeItems(itemList);
          msGMLFreeGroups(groupList);
          return status;
        }
      }

      geometryList = msGMLGetGeometries(lp, "GFO", MS_TRUE);

      pszValueReference = msWFSStripNS(paramsObj->pszValueReference);
      pszValueReference = msWFSUnaliasItem(lp, pszValueReference);
      pszValueReference =
          msWFSUngroupItem(lp, groupList, pszValueReference, &nGroupIndex);

      if (strcmp(paramsObj->pszValueReference, "@gml:id") == 0) {
        pszGMLGroups = msStrdup("");
        pszGMLIncludeItems = msStrdup(paramsObj->pszValueReference);
        pszGMLGeometries = msStrdup("none");
      } else if (nGroupIndex >= 0) {
        int w;
        char *pszItems = NULL;
        for (w = 0; w < groupList->groups[nGroupIndex].numitems; w++) {
          if (w > 0)
            pszItems = msStringConcatenate(pszItems, ",");
          pszItems = msStringConcatenate(
              pszItems, groupList->groups[nGroupIndex].items[w]);
        }
        pszGMLGroups = msStrdup(groupList->groups[nGroupIndex].name);
        pszGMLIncludeItems = msStrdup(pszItems);
        pszGMLGeometries = msStrdup("none");
        msFree(pszItems);
      } else {
        pszGMLGroups = msStrdup("");

        /* Check that the property name is allowed (#3563) */
        /*we need to check of the property name is the geometry name; In that
           case it is a valid property name*/
        if (!msWFSIsAllowedItem(itemList, pszValueReference)) {
          for (z = 0; z < geometryList->numgeometries; z++) {
            if (strcasecmp(pszValueReference,
                           geometryList->geometries[z].name) == 0)
              break;
          }

          if (z == geometryList->numgeometries) {
            msSetError(MS_WFSERR, "Invalid VALUEREFERENCE %s",
                       "msWFSGetPropertyValue()", paramsObj->pszValueReference);
            msFree(pszGMLGroups);
            msGMLFreeItems(itemList);
            msGMLFreeGroups(groupList);
            msGMLFreeGeometries(geometryList);
            return msWFSException(map, "valuereference",
                                  MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                                  paramsObj->pszVersion);
          } else {
            pszGMLIncludeItems = msStrdup("");
            pszGMLGeometries = msStrdup(pszValueReference);
          }
        } else {
          pszGMLIncludeItems = msStrdup(pszValueReference);
          pszGMLGeometries = msStrdup("none");
        }
      }

      msLayerClose(lp);

      msGMLFreeItems(itemList);
      msGMLFreeGroups(groupList);
      msGMLFreeGeometries(geometryList);
    }
  } else {
    /* Requested layer name was not in capabilities:
     * either it just doesn't exist
     */
    msSetError(MS_WFSERR,
               "TYPENAME '%s' doesn't exist in this server.  Please check the "
               "capabilities and reformulate your request.",
               "msWFSGetFeature()", paramsObj->pszTypeName);
    msFree(pszGMLGroups);
    msFree(pszGMLIncludeItems);
    msFree(pszGMLGeometries);
    return msWFSException(map, "typename", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  }

  /* Initialize gml options */
  msWFSInitGMLInfo(&gmlinfo);

  if (paramsObj->pszResultType != NULL) {
    if (strcasecmp(paramsObj->pszResultType, "hits") == 0)
      iResultTypeHits = 1;
  }

  gmlinfo._typename = paramsObj->pszTypeName;

  /* Validate outputformat */
  status = msWFSGetGMLOutputFormat(paramsObj, &gmlinfo, nWFSVersion);
  if (status < 0) {
    msSetError(
        MS_WFSERR,
        "'%s' is not a permitted output format for GetPropertyValue request.",
        "msWFSGetPropertyValue()", paramsObj->pszOutputFormat);
    msFree(pszGMLGroups);
    msFree(pszGMLIncludeItems);
    msFree(pszGMLGeometries);
    return msWFSException(map, "outputformat",
                          MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                          paramsObj->pszVersion);
  } else {
    outputformat = (OWSGMLVersion)status;
  }

  msWFSAnalyzeStartIndexAndFeatureCount(map, paramsObj, iResultTypeHits,
                                        &maxfeatures, &startindex);

  status = msWFSAnalyzeBBOX(map, paramsObj, &bbox, &sBBoxSrs);
  if (status != 0) {
    msFree(pszGMLGroups);
    msFree(pszGMLIncludeItems);
    msFree(pszGMLGeometries);
    return status;
  }

  if (iResultTypeHits == 1) {
    map->query.only_cache_result_count = MS_TRUE;
  } else {
    msWFSSetShapeCache(map);
  }

  status = msWFSRetrieveFeatures(
      map, ows_request, paramsObj, &gmlinfo, paramsObj->pszFilter,
      paramsObj->pszBbox != NULL, sBBoxSrs, bbox, paramsObj->pszFeatureId,
      (char **)&pszTypeName, 1, maxfeatures, nWFSVersion, &iNumberOfFeatures,
      &bHasNextFeatures);
  if (status != MS_SUCCESS) {
    msFree(sBBoxSrs);
    msFree(pszGMLGroups);
    msFree(pszGMLIncludeItems);
    msFree(pszGMLGeometries);
    return status;
  }

  /* ----------------------------------------- */
  /* Now compute nMatchingFeatures for WFS 2.0 */
  /* ----------------------------------------- */

  nMatchingFeatures = msWFSComputeMatchingFeatures(
      map, ows_request, paramsObj, iNumberOfFeatures, maxfeatures, &gmlinfo,
      bbox, sBBoxSrs, (char **)&pszTypeName, 1, nWFSVersion);

  msFree(sBBoxSrs);
  sBBoxSrs = NULL;

  /*
  ** GML Header generation.
  */
  msIO_setHeader("Content-Type", "%s; charset=UTF-8", gmlinfo.output_mime_type);
  msIO_sendHeaders();

  status = msWFSGetFeature_GMLPreamble(
      map, req, &gmlinfo, paramsObj, outputformat, iResultTypeHits,
      iNumberOfFeatures, nMatchingFeatures, maxfeatures, bHasNextFeatures,
      nWFSVersion);

  if (status == MS_SUCCESS && maxfeatures != 0 && iResultTypeHits == 0) {
    if (pszGMLGroups)
      msInsertHashTable(&(lp->metadata), "GML_GROUPS", pszGMLGroups);
    if (pszGMLIncludeItems)
      msInsertHashTable(&(lp->metadata), "GML_INCLUDE_ITEMS",
                        pszGMLIncludeItems);
    if (pszGMLGeometries)
      msInsertHashTable(&(lp->metadata), "GML_GEOMETRIES", pszGMLGeometries);

    status = msGMLWriteWFSQuery(map, stdout, gmlinfo.user_namespace_prefix,
                                outputformat, nWFSVersion, MS_TRUE, MS_TRUE);
  }

  msIO_printf("</wfs:ValueCollection>\n");

  msFree(pszGMLGroups);
  msFree(pszGMLIncludeItems);
  msFree(pszGMLGeometries);

  free(gmlinfo.script_url);
  free(gmlinfo.script_url_encoded);
  msFree(gmlinfo.user_namespace_uri_encoded);

  return status;
}

#endif /* USE_WFS_SVR */

/*
** msWFSDispatch() is the entry point for WFS requests.
** - If this is a valid request then it is processed and MS_SUCCESS is returned
**   on success, or MS_FAILURE on failure.
** - If this does not appear to be a valid WFS request then MS_DONE
**   is returned and MapServer is expected to process this as a regular
**   MapServer request.
*/
int msWFSDispatch(mapObj *map, cgiRequestObj *requestobj,
                  owsRequestObj *ows_request, int force_wfs_mode) {
#ifdef USE_WFS_SVR
  int status;
  int returnvalue = MS_DONE;
  int nWFSVersion;
  char *validated_language;

  /* static char *wmtver = NULL, *request=NULL, *service=NULL; */
  wfsParamsObj *paramsObj;
  /*
  ** Populate the Params object based on the request
  */
  paramsObj = msWFSCreateParamsObj();
  /* TODO : store also parameters that are inside the map object */
  /* into the paramsObj.  */
  status = msWFSParseRequest(map, requestobj, paramsObj, force_wfs_mode);
  if (status != MS_SUCCESS) {
    msWFSFreeParamsObj(paramsObj);
    return status;
  }

  validated_language =
      msOWSGetLanguageFromList(map, "FO", paramsObj->pszLanguage);
  if (validated_language != NULL) {
    msMapSetLanguageSpecificConnection(map, validated_language);
  }
  msFree(validated_language);

  if (force_wfs_mode) {
    /*request is always required*/
    if (paramsObj->pszRequest == NULL || strlen(paramsObj->pszRequest) <= 0) {
      msSetError(MS_WFSERR, "Incomplete WFS request: REQUEST parameter missing",
                 "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "request", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }

    /*version:
      wfs 1.0 and 1.1.0 POST request: optional
      wfs 1.0 and 1.1.0 GET request: optional for getcapabilities and required
      for describefeature and getfeature
     */
    if (paramsObj->pszVersion == NULL && requestobj &&
        requestobj->postrequest == NULL &&
        strcasecmp(paramsObj->pszRequest, "GetCapabilities") != 0) {
      msSetError(MS_WFSERR, "Invalid WFS request: VERSION parameter missing",
                 "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "version", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }

    if (paramsObj->pszVersion == NULL || strlen(paramsObj->pszVersion) <= 0)
      paramsObj->pszVersion = msStrdup(msWFSGetDefaultVersion(map));

    /*service
      wfs 1.0 and 1.1.0 GET: required and should be set to WFS
      wfs 1.0 POST: required
      wfs 1.1.1 POST: optional
    */
    if ((paramsObj->pszService == NULL || strlen(paramsObj->pszService) == 0) &&
        ((requestobj && requestobj->postrequest == NULL) ||
         strcasecmp(paramsObj->pszVersion, "1.0") == 0)) {
      msSetError(MS_WFSERR, "Invalid WFS request: Missing SERVICE parameter",
                 "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "service", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }

    if (paramsObj->pszService == NULL || strlen(paramsObj->pszService) == 0)
      paramsObj->pszService = msStrdup("WFS");

    if (paramsObj->pszService != NULL &&
        strcasecmp(paramsObj->pszService, "WFS") != 0) {
      msSetError(MS_WFSERR,
                 "Invalid WFS request: SERVICE parameter must be set to WFS",
                 "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "service", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }
  }
  /* If SERVICE is specified then it MUST be "WFS" */
  if (paramsObj->pszService != NULL &&
      strcasecmp(paramsObj->pszService, "WFS") != 0) {
    msWFSFreeParamsObj(paramsObj);
    return MS_DONE; /* Not a WFS request */
  }

  /* If SERVICE, VERSION and REQUEST not included than this isn't a WFS req*/
  if (paramsObj->pszService == NULL && paramsObj->pszVersion == NULL &&
      paramsObj->pszRequest == NULL) {
    msWFSFreeParamsObj(paramsObj);
    return MS_DONE; /* Not a WFS request */
  }

  /* VERSION *and* REQUEST *and* SERVICE required by all WFS requests including
   * GetCapabilities.
   */
  if (paramsObj->pszVersion == NULL || strlen(paramsObj->pszVersion) <= 0) {
    msSetError(MS_WFSERR, "Incomplete WFS request: VERSION parameter missing",
               "msWFSDispatch()");

    returnvalue =
        msWFSException11(map, "version", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                         msWFSGetDefaultVersion(map));
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }

  if (paramsObj->pszRequest == NULL || strlen(paramsObj->pszRequest) <= 0) {
    msSetError(MS_WFSERR, "Incomplete WFS request: REQUEST parameter missing",
               "msWFSDispatch()");
    returnvalue =
        msWFSException(map, "request", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                       paramsObj->pszVersion);
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }

  if (paramsObj->pszService == NULL || strlen(paramsObj->pszService) <= 0) {
    msSetError(MS_WFSERR, "Incomplete WFS request: SERVICE parameter missing",
               "msWFSDispatch()");

    returnvalue =
        msWFSException(map, "service", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                       paramsObj->pszVersion);
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }

  if ((status = msOWSMakeAllLayersUnique(map)) != MS_SUCCESS) {
    msSetError(MS_WFSERR, "msOWSMakeAllLayersUnique() failed",
               "msWFSDispatch()");
    returnvalue = msWFSException(
        map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE, paramsObj->pszVersion);
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }
  /*
  ** Start dispatching requests
  */
  if (strcasecmp(paramsObj->pszRequest, "GetCapabilities") == 0) {
    msOWSRequestLayersEnabled(map, "F", paramsObj->pszRequest, ows_request);
    if (ows_request->numlayers == 0) {
      msSetError(
          MS_WFSERR,
          "WFS request not enabled. Check wfs/ows_enable_request settings.",
          "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "request", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }

    returnvalue = msWFSGetCapabilities(map, paramsObj, requestobj, ows_request);
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }

  /*
  ** Validate VERSION against the versions that we support... we don't do this
  ** for GetCapabilities in order to allow version negotiation.
  */
  if (strcmp(paramsObj->pszVersion, "1.0.0") != 0 &&
      strcmp(paramsObj->pszVersion, "1.1.0") != 0 &&
      strcmp(paramsObj->pszVersion, "2.0.0") != 0) {
    msSetError(MS_WFSERR, "WFS Server does not support VERSION %s.",
               "msWFSDispatch()", paramsObj->pszVersion);
    returnvalue =
        msWFSException(map, "version", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                       msWFSGetDefaultVersion(map));
    msWFSFreeParamsObj(paramsObj);
    return returnvalue;
  }

  nWFSVersion = msOWSParseVersionString(paramsObj->pszVersion);

  /* Since the function can still return MS_DONE, we add an extra service check
     to not call msOWSRequestLayersEnabled twice */
  if (strcasecmp(paramsObj->pszService, "WFS") == 0) {
    msOWSRequestLayersEnabled(map, "F", paramsObj->pszRequest, ows_request);
    if (ows_request->numlayers == 0) {
      msSetError(
          MS_WFSERR,
          "WFS request not enabled. Check wfs/ows_enable_request settings.",
          "msWFSDispatch()");
      returnvalue =
          msWFSException(map, "request", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                         paramsObj->pszVersion);
      msWFSFreeParamsObj(paramsObj);
      return returnvalue;
    }
  }

  returnvalue = MS_DONE;
  /* Continue dispatching...
   */
  if (strcasecmp(paramsObj->pszRequest, "DescribeFeatureType") == 0)
    returnvalue =
        msWFSDescribeFeatureType(map, paramsObj, ows_request, nWFSVersion);

  else if (strcasecmp(paramsObj->pszRequest, "GetFeature") == 0)
    returnvalue =
        msWFSGetFeature(map, paramsObj, requestobj, ows_request, nWFSVersion);

  else if (nWFSVersion >= OWS_2_0_0 &&
           strcasecmp(paramsObj->pszRequest, "GetPropertyValue") == 0)
    returnvalue = msWFSGetPropertyValue(map, paramsObj, requestobj, ows_request,
                                        nWFSVersion);

  else if (nWFSVersion >= OWS_2_0_0 &&
           strcasecmp(paramsObj->pszRequest, "ListStoredQueries") == 0)
    returnvalue = msWFSListStoredQueries20(map, ows_request);

  else if (nWFSVersion >= OWS_2_0_0 &&
           strcasecmp(paramsObj->pszRequest, "DescribeStoredQueries") == 0)
    returnvalue = msWFSDescribeStoredQueries20(map, paramsObj, ows_request);

  else if (msWFSGetIndexUnsupportedOperation(paramsObj->pszRequest) >= 0) {
    /* Unsupported WFS request */
    msSetError(MS_WFSERR, "Unsupported WFS request: %s", "msWFSDispatch()",
               paramsObj->pszRequest);
    returnvalue = msWFSException(map, paramsObj->pszRequest,
                                 MS_OWS_ERROR_OPERATION_NOT_SUPPORTED,
                                 paramsObj->pszVersion);
  } else if (strcasecmp(paramsObj->pszService, "WFS") == 0) {
    /* Invalid WFS request */
    msSetError(MS_WFSERR, "Invalid WFS request: %s", "msWFSDispatch()",
               paramsObj->pszRequest);
    returnvalue =
        msWFSException(map, "request", MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                       paramsObj->pszVersion);
  }

  /* This was not detected as a WFS request... let MapServer handle it */
  msWFSFreeParamsObj(paramsObj);
  return returnvalue;

#else
  (void)map;
  (void)requestobj;
  (void)ows_request;
  (void)force_wfs_mode;
  msSetError(MS_WFSERR, "WFS server support is not available.",
             "msWFSDispatch()");
  return (MS_FAILURE);
#endif
}

/************************************************************************/
/*                           msWFSCreateParamsObj                       */
/*                                                                      */
/*      Create a parameter object, initialize it.                       */
/*      The caller should free the object using msWFSFreeParamsObj.     */
/************************************************************************/
wfsParamsObj *msWFSCreateParamsObj() {
  wfsParamsObj *paramsObj = (wfsParamsObj *)calloc(1, sizeof(wfsParamsObj));
  MS_CHECK_ALLOC(paramsObj, sizeof(wfsParamsObj), NULL);

  paramsObj->nMaxFeatures = -1;
  paramsObj->nStartIndex = -1;

  return paramsObj;
}

/************************************************************************/
/*                            msWFSFreeParmsObj                         */
/*                                                                      */
/*      Free params object.                                             */
/************************************************************************/
void msWFSFreeParamsObj(wfsParamsObj *wfsparams) {
  if (wfsparams) {
    free(wfsparams->pszVersion);
    free(wfsparams->pszUpdateSequence);
    free(wfsparams->pszRequest);
    free(wfsparams->pszService);
    free(wfsparams->pszTypeName);
    free(wfsparams->pszFilter);
    free(wfsparams->pszFilterLanguage);
    free(wfsparams->pszBbox);
    free(wfsparams->pszGeometryName);
    free(wfsparams->pszOutputFormat);
    free(wfsparams->pszFeatureId);
    free(wfsparams->pszSrs);
    free(wfsparams->pszResultType);
    free(wfsparams->pszPropertyName);
    free(wfsparams->pszAcceptVersions);
    free(wfsparams->pszSections);
    free(wfsparams->pszSortBy);
    free(wfsparams->pszLanguage);
    free(wfsparams->pszValueReference);
    free(wfsparams->pszStoredQueryId);

    free(wfsparams);
  }
}

#ifdef USE_WFS_SVR
/************************************************************************/
/*                       msWFSGetDefaultVersion                         */
/************************************************************************/
static const char *msWFSGetDefaultVersion(mapObj *map) {
  const char *pszVersion =
      msOWSLookupMetadata(&(map->web.metadata), "F", "getcapabilities_version");
  if (pszVersion != NULL) {
    /* Check that the metadata value is one of the recognized versions */
    int iVersion = msOWSParseVersionString(pszVersion);
    int i;
    for (i = 0; i < wfsNumSupportedVersions; i++) {
      if (iVersion == wfsSupportedVersions[i])
        return wfsSupportedVersionsStr[i];
    }
    /* If not, use the default (= latest) version */
    msDebug("msWFSGetDefaultVersion(): invalid value for "
            "wfs_getcapabilities_version: %s\n",
            pszVersion);
  }
  return WFS_LATEST_VERSION;
}

/************************************************************************/
/*                             msWFSSetParam                            */
/************************************************************************/
static int msWFSSetParam(char **ppszOut, cgiRequestObj *request, int i,
                         const char *pszExpectedParamName) {
  if (strcasecmp(request->ParamNames[i], pszExpectedParamName) == 0) {
    if (*ppszOut == NULL)
      *ppszOut = msStrdup(request->ParamValues[i]);
    return 1;
  }
  return 0;
}

/************************************************************************/
/*                         msWFSParseXMLQueryNode                       */
/************************************************************************/

static void msWFSParseXMLQueryNode(CPLXMLNode *psQuery,
                                   wfsParamsObj *wfsparams) {
  const char *pszTypename;
  const char *pszValue;
  char *pszSerializedFilter, *pszTmp, *pszTmp2;
  CPLXMLNode *psPropertyName;
  CPLXMLNode *psFilter;
  CPLXMLNode *psSortBy;
  char *pszSortBy = NULL;

  pszValue = CPLGetXMLValue(psQuery, "srsName", NULL);
  if (pszValue) {
    msFree(wfsparams->pszSrs);
    wfsparams->pszSrs = msStrdup(pszValue);
  }

  /* parse typenames */
  pszTypename = CPLGetXMLValue(psQuery, "typename", NULL);
  if (pszTypename == NULL) /* WFS 2.0 */
    pszTypename = CPLGetXMLValue(psQuery, "typeNames", NULL);

  /*parse property name*/
  psPropertyName = CPLGetXMLNode(psQuery, "PropertyName");
  pszTmp2 = NULL;

  /*when there is no PropertyName, we output (!) so that it is parsed properly
   * in GetFeature*/
  if (psPropertyName == NULL)
    pszTmp2 = msStrdup("!");

  while (psPropertyName) {
    if (!psPropertyName->pszValue ||
        strcasecmp(psPropertyName->pszValue, "PropertyName") != 0) {
      psPropertyName = psPropertyName->psNext;
      continue;
    }
    pszValue = CPLGetXMLValue(psPropertyName, NULL, NULL);
    if (pszTmp2 == NULL) {
      pszTmp2 = msStrdup(pszValue);
    } else {
      pszTmp = msStrdup(pszTmp2);
      const size_t nSize = strlen(pszTmp) + strlen(pszValue) + 2;
      pszTmp2 = (char *)msSmallRealloc(pszTmp2, nSize);
      snprintf(pszTmp2, nSize, "%s,%s", pszTmp, pszValue);
      msFree(pszTmp);
    }
    psPropertyName = psPropertyName->psNext;
  }
  if (pszTmp2) {
    pszTmp = msStrdup(pszTmp2);
    const size_t nSize = strlen(pszTmp) + 3;
    pszTmp2 = (char *)msSmallRealloc(pszTmp2, nSize);
    snprintf(pszTmp2, nSize, "(%s)", pszTmp);
    msFree(pszTmp);

    msWFSBuildParamList(&(wfsparams->pszPropertyName), pszTmp2, "");
    msFree(pszTmp2);
    pszTmp2 = NULL;
  }

  /* parse filter */
  psFilter = CPLGetXMLNode(psQuery, "Filter");

  if (psFilter == NULL) {
    /*when there is no Filter, we output (!) so that it is parsed properly in
     * GetFeature*/
    pszSerializedFilter = msStrdup("(!)");
  } else {
    char *pszCPLTmp = CPLSerializeXMLTree(psFilter);
    const size_t nSize = strlen(pszCPLTmp) + 3;
    pszSerializedFilter = (char *)msSmallMalloc(nSize);
    snprintf(pszSerializedFilter, nSize, "(%s)", pszCPLTmp);
    CPLFree(pszCPLTmp);
  }

  msWFSBuildParamList(&(wfsparams->pszFilter), pszSerializedFilter, "");
  free(pszSerializedFilter);

  /* parse SortBy */
  psSortBy = CPLGetXMLNode(psQuery, "SortBy");
  if (psSortBy != NULL) {
    int bFirstProperty = MS_TRUE;
    CPLXMLNode *psIter = psSortBy->psChild;

    pszSortBy = msStringConcatenate(pszSortBy, "(");

    while (psIter != NULL) {
      if (psIter->eType == CXT_Element &&
          strcmp(psIter->pszValue, "SortProperty") == 0) {
        const char *pszPropertyName =
            CPLGetXMLValue(psIter, "PropertyName", NULL);
        if (pszPropertyName == NULL)
          pszPropertyName = CPLGetXMLValue(psIter, "ValueReference", NULL);
        if (pszPropertyName != NULL) {
          const char *pszSortOrder = CPLGetXMLValue(psIter, "SortOrder", NULL);
          if (!bFirstProperty)
            pszSortBy = msStringConcatenate(pszSortBy, ",");
          bFirstProperty = MS_FALSE;

          pszSortBy = msStringConcatenate(pszSortBy, pszPropertyName);
          if (pszSortOrder != NULL) {
            pszSortBy = msStringConcatenate(pszSortBy, " ");
            pszSortBy = msStringConcatenate(pszSortBy, pszSortOrder);
          }
        }
      }
      psIter = psIter->psNext;
    }

    pszSortBy = msStringConcatenate(pszSortBy, ")");
  } else {
    pszSortBy = msStrdup("(!)");
  }

  msWFSBuildParamList(&(wfsparams->pszSortBy), pszSortBy, "");
  free(pszSortBy);

  /* Special case for "urn:ogc:def:query:OGC-WFS::GetFeatureById" */
  /* Resolve the property typename */
  if (pszTypename != NULL && strcmp(pszTypename, "?") == 0 &&
      psFilter != NULL) {
    const char *rid;
    rid = CPLGetXMLValue(psFilter, "ResourceId.rid", NULL);
    if (rid != NULL) {
      char *pszTmpTypename = msStrdup(rid);
      char *pszDot = strchr(pszTmpTypename, '.');
      if (pszDot) {
        *pszDot = '\0';
        msWFSBuildParamList(&(wfsparams->pszTypeName), pszTmpTypename, ",");
        pszTypename = NULL;

        if (wfsparams->countGetFeatureById >= 0)
          wfsparams->countGetFeatureById++;
      } else
        wfsparams->countGetFeatureById = -1;
      msFree(pszTmpTypename);
    } else
      wfsparams->countGetFeatureById = -1;
  } else
    wfsparams->countGetFeatureById = -1;

  if (pszTypename) {
    msWFSBuildParamList(&(wfsparams->pszTypeName), pszTypename, ",");
  }
}

/************************************************************************/
/*                     msWFSAnalyzeStoredQuery                          */
/************************************************************************/

static int msWFSAnalyzeStoredQuery(mapObj *map, wfsParamsObj *wfsparams,
                                   const char *id,
                                   const char *pszResolvedQuery) {
  CPLXMLNode *psRoot;
  CPLXMLNode *psQuery;
  CPLXMLNode *psIter;

  psRoot = CPLParseXMLString(pszResolvedQuery);

  if (psRoot == NULL) {
    msSetError(MS_WFSERR,
               "Resolved definition for stored query '%s' is invalid",
               "msWFSParseRequest()", id);
    msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                   wfsparams->pszVersion);
    return MS_FAILURE;
  }

  CPLStripXMLNamespace(psRoot, NULL, 1);
  psQuery = CPLGetXMLNode(psRoot,
                          "=StoredQueryDescription.QueryExpressionText.Query");
  if (psQuery == NULL) {
    msSetError(MS_WFSERR,
               "Resolved definition for stored query '%s' is invalid",
               "msWFSParseRequest()", id);
    msWFSException(map, "mapserv", MS_OWS_ERROR_NO_APPLICABLE_CODE,
                   wfsparams->pszVersion);
    CPLDestroyXMLNode(psRoot);
    return MS_FAILURE;
  }

  psIter = psQuery;
  while (psIter != NULL) {
    if (psIter->eType == CXT_Element &&
        strcmp(psIter->pszValue, "Query") == 0) {
      msWFSParseXMLQueryNode(psIter, wfsparams);
    }
    psIter = psIter->psNext;
  }

  CPLDestroyXMLNode(psRoot);

  return MS_SUCCESS;
}

/************************************************************************/
/*                     msWFSParseXMLStoredQueryNode                     */
/************************************************************************/

static int msWFSParseXMLStoredQueryNode(mapObj *map, wfsParamsObj *wfsparams,
                                        CPLXMLNode *psQuery) {
  const char *id;
  CPLXMLNode *psIter;
  hashTableObj *hashTable;
  char *pszResolvedQuery;
  int status;

  id = CPLGetXMLValue(psQuery, "id", NULL);
  if (id == NULL) {
    msSetError(MS_WFSERR, "Missing 'id' attribute in StoredQuery",
               "msWFSParseRequest()");
    return msWFSException(map, "id", MS_OWS_ERROR_MISSING_PARAMETER_VALUE,
                          wfsparams->pszVersion);
  }

  hashTable = msCreateHashTable();
  psIter = psQuery->psChild;
  while (psIter != NULL) {
    if (psIter->eType == CXT_Element &&
        strcmp(psIter->pszValue, "Parameter") == 0) {
      const char *name;
      CPLXMLNode *psIter2;
      char *pszValue;

      name = CPLGetXMLValue(psIter, "name", NULL);
      if (name == NULL) {
        msSetError(MS_WFSERR,
                   "Missing 'name' attribute in Parameter of StoredQuery",
                   "msWFSParseRequest()");
        msFreeHashTable(hashTable);
        return msWFSException(map, NULL, MS_OWS_ERROR_INVALID_PARAMETER_VALUE,
                              wfsparams->pszVersion);
      }

      psIter2 = psIter->psChild;
      while (psIter2 != NULL) {
        if (psIter2->eType != CXT_Attribute)
          break;
        psIter2 = psIter2->psNext;
      }

      pszValue = CPLSerializeXMLTree(psIter2);
      msInsertHashTable(hashTable, name, pszValue);
      CPLFree(pszValue);
    }
    psIter = psIter->psNext;
  }

  pszResolvedQuery =
      msWFSGetResolvedStoredQuery20(map, wfsparams, id, hashTable);
  msFreeHashTable(hashTable);
  if (pszResolvedQuery == NULL)
    return MS_FAILURE;

  status = msWFSAnalyzeStoredQuery(map, wfsparams, id, pszResolvedQuery);

  msFree(pszResolvedQuery);

  return status;
}

/************************************************************************/
/*                    msWFSSimplifyPropertyNameAndFilter                */
/************************************************************************/

static void msWFSSimplifyPropertyNameAndFilter(wfsParamsObj *wfsparams) {
  int i;

  /* If no PropertyName at all was specified, then clear the field */
  /* that will be easier to generate valid 'next' and 'previous' uri */
  /* for WFS 2.0 GetFeature */
  if (wfsparams->pszPropertyName != NULL) {
    i = 0;
    while (strncmp(wfsparams->pszPropertyName + i, "(!)", 3) == 0)
      i += 3;
    if (wfsparams->pszPropertyName[i] == '\0') {
      msFree(wfsparams->pszPropertyName);
      wfsparams->pszPropertyName = NULL;
    }
  }

  /* Same with filter */
  if (wfsparams->pszFilter != NULL) {
    i = 0;
    while (strncmp(wfsparams->pszFilter + i, "(!)", 3) == 0)
      i += 3;
    if (wfsparams->pszFilter[i] == '\0') {
      msFree(wfsparams->pszFilter);
      wfsparams->pszFilter = NULL;
    }
  }

  /* Same with SortBy */
  if (wfsparams->pszSortBy != NULL) {
    i = 0;
    while (strncmp(wfsparams->pszSortBy + i, "(!)", 3) == 0)
      i += 3;
    if (wfsparams->pszSortBy[i] == '\0') {
      msFree(wfsparams->pszSortBy);
      wfsparams->pszSortBy = NULL;
    }
  }
}

#endif /* USE_WFS_SVR */

/************************************************************************/
/*                            msWFSParseRequest                         */
/*                                                                      */
/*      Parse request into the params object.                           */
/************************************************************************/
int msWFSParseRequest(mapObj *map, cgiRequestObj *request,
                      wfsParamsObj *wfsparams, int force_wfs_mode) {
#ifdef USE_WFS_SVR
  int i = 0;

  if (!request || !wfsparams)
    return msWFSException(map, "request", "InvalidRequest", NULL);

  if (request->NumParams > 0 && request->postrequest == NULL) {
    for (i = 0; i < request->NumParams; i++) {
      if (request->ParamNames[i] && request->ParamValues[i]) {
        if (msWFSSetParam(&(wfsparams->pszVersion), request, i, "VERSION")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszUpdateSequence), request, i,
                               "UPDATESEQUENCE")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszRequest), request, i,
                               "REQUEST")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszService), request, i,
                               "SERVICE")) {
        }

        else if (strcasecmp(request->ParamNames[i], "MAXFEATURES") == 0)
          wfsparams->nMaxFeatures = atoi(request->ParamValues[i]);

        /* WFS 2.0 */
        else if (strcasecmp(request->ParamNames[i], "COUNT") == 0)
          wfsparams->nMaxFeatures = atoi(request->ParamValues[i]);

        else if (strcasecmp(request->ParamNames[i], "STARTINDEX") == 0)
          wfsparams->nStartIndex = atoi(request->ParamValues[i]);

        else if (msWFSSetParam(&(wfsparams->pszBbox), request, i, "BBOX")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszSrs), request, i, "SRSNAME")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszResultType), request, i,
                               "RESULTTYPE")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszTypeName), request, i,
                               "TYPENAME")) {
        }

        /* WFS 2.0 */
        else if (msWFSSetParam(&(wfsparams->pszTypeName), request, i,
                               "TYPENAMES")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszFilter), request, i, "FILTER")) {
        }

        /* WFS 2.0 */
        else if (msWFSSetParam(&(wfsparams->pszFilterLanguage), request, i,
                               "FILTER_LANGUAGE")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszOutputFormat), request, i,
                               "OUTPUTFORMAT")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszFeatureId), request, i,
                               "FEATUREID")) {
        }

        /* WFS 2.0 */
        else if (msWFSSetParam(&(wfsparams->pszFeatureId), request, i,
                               "RESOURCEID")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszPropertyName), request, i,
                               "PROPERTYNAME")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszAcceptVersions), request, i,
                               "ACCEPTVERSIONS")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszSections), request, i,
                               "SECTIONS")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszSortBy), request, i, "SORTBY")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszLanguage), request, i,
                               "LANGUAGE")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszValueReference), request, i,
                               "VALUEREFERENCE")) {
        }

        else if (msWFSSetParam(&(wfsparams->pszStoredQueryId), request, i,
                               "STOREDQUERY_ID")) {
        }
      }
    }
    /* version is optional is the GetCapabilities. If not */
    /* provided, set it. Default it to latest implemented version */
    /* or to the specified one in wfs_getcapabilities_version */
    if (wfsparams->pszVersion == NULL && wfsparams->pszRequest &&
        strcasecmp(wfsparams->pszRequest, "GetCapabilities") == 0) {
      wfsparams->pszVersion = msStrdup(msWFSGetDefaultVersion(map));
    }
  }

  /* -------------------------------------------------------------------- */
  /*      Parse the post request. It is assumed to be an XML document.    */
  /* -------------------------------------------------------------------- */
  if (request->postrequest != NULL) {

    CPLXMLNode *psRoot;
    CPLXMLNode *psGetFeature = NULL;
    CPLXMLNode *psGetCapabilities = NULL;
    CPLXMLNode *psDescribeFeature = NULL;
    CPLXMLNode *psGetPropertyValue = NULL;
    CPLXMLNode *psListStoredQueries = NULL;
    CPLXMLNode *psDescribeStoredQueries = NULL;
    CPLXMLNode *psOperation = NULL;
    const char *pszValue;
    char *pszSchemaLocation = NULL;

    psRoot = CPLParseXMLString(request->postrequest);
    if (map->debug == MS_DEBUGLEVEL_VVV) {
      msDebug("msWFSParseRequest(): WFS post request: %s\n",
              request->postrequest);
    }
    if (psRoot) {
      /* need to strip namespaces */
      CPLStripXMLNamespace(psRoot, NULL, 1);

      for (psOperation = psRoot; psOperation != NULL;
           psOperation = psOperation->psNext) {
        if (psOperation->eType == CXT_Element) {

          /* keep schemaLocation so as to be able to validate against
           * appropriate */
          /* wfs.xsd schema afterwards */
          if (pszSchemaLocation == NULL &&
              CPLGetXMLValue(psOperation, "schemaLocation", NULL) != NULL)
            pszSchemaLocation =
                msStrdup(CPLGetXMLValue(psOperation, "schemaLocation", NULL));

          if (strcasecmp(psOperation->pszValue, "GetFeature") == 0) {
            psGetFeature = psOperation;
            break;
          } else if (strcasecmp(psOperation->pszValue, "GetCapabilities") ==
                     0) {
            psGetCapabilities = psOperation;
            break;
          } else if (strcasecmp(psOperation->pszValue, "DescribeFeatureType") ==
                     0) {
            psDescribeFeature = psOperation;
            break;
          } else if (strcasecmp(psOperation->pszValue, "GetPropertyValue") ==
                     0) {
            psGetPropertyValue = psOperation;
            break;
          } else if (strcasecmp(psOperation->pszValue, "ListStoredQueries") ==
                     0) {
            psListStoredQueries = psOperation;
            break;
          } else if (strcasecmp(psOperation->pszValue,
                                "DescribeStoredQueries") == 0) {
            psDescribeStoredQueries = psOperation;
            break;
          }
          /* these are unsupported requests. Just set the  */
          /* request value and return; */
          else {
            int idx = msWFSGetIndexUnsupportedOperation(psOperation->pszValue);
            if (idx >= 0) {
              wfsparams->pszRequest = msStrdup(wfsUnsupportedOperations[idx]);
              break;
            }
          }
        }
      }

      if (psOperation != NULL) {
        pszValue = CPLGetXMLValue(psOperation, "version", NULL);
        if (pszValue)
          wfsparams->pszVersion = msStrdup(pszValue);

        pszValue = CPLGetXMLValue(psOperation, "service", NULL);
        if (pszValue)
          wfsparams->pszService = msStrdup(pszValue);
      }

      /* -------------------------------------------------------------------- */
      /*      Parse the GetFeature                                            */
      /* -------------------------------------------------------------------- */
      if (psGetFeature) {
        CPLXMLNode *psIter;

        wfsparams->pszRequest = msStrdup("GetFeature");

        pszValue = CPLGetXMLValue(psGetFeature, "resultType", NULL);
        if (pszValue)
          wfsparams->pszResultType = msStrdup(pszValue);

        pszValue = CPLGetXMLValue(psGetFeature, "maxFeatures", NULL);
        if (pszValue)
          wfsparams->nMaxFeatures = atoi(pszValue);
        else {
          /* WFS 2.0 */
          pszValue = CPLGetXMLValue(psGetFeature, "count", NULL);
          if (pszValue)
            wfsparams->nMaxFeatures = atoi(pszValue);
        }

        pszValue = CPLGetXMLValue(psGetFeature, "startIndex", NULL);
        if (pszValue)
          wfsparams->nStartIndex = atoi(pszValue);

        pszValue = CPLGetXMLValue(psGetFeature, "outputFormat", NULL);
        if (pszValue)
          wfsparams->pszOutputFormat = msStrdup(pszValue);

        /* --------------------------------------------------------------------
         */
        /*      Parse typenames and filters. If there are multiple queries, */
        /*      typenames will be build with comma between them */
        /*      (typename1,typename2,...) and filters will be build with */
        /*      bracets enclosinf the filters :(filter1)(filter2)... */
        /*      propertynames are stored like (property1,property2)(property1)
         */
        /* --------------------------------------------------------------------
         */
        psIter = psGetFeature->psChild;
        while (psIter != NULL) {
          if (psIter->eType == CXT_Element &&
              strcmp(psIter->pszValue, "Query") == 0) {
            msWFSParseXMLQueryNode(psIter, wfsparams);
          } else if (psIter->eType == CXT_Element &&
                     strcmp(psIter->pszValue, "StoredQuery") == 0) {
            int status = msWFSParseXMLStoredQueryNode(map, wfsparams, psIter);
            if (status != MS_SUCCESS) {
              CPLDestroyXMLNode(psRoot);
              msFree(pszSchemaLocation);
              return status;
            }
            wfsparams->bHasPostStoredQuery = MS_TRUE;
          }
          psIter = psIter->psNext;
        }

        msWFSSimplifyPropertyNameAndFilter(wfsparams);
      } /* end of GetFeature */

      /* -------------------------------------------------------------------- */
      /*      Parse the GetPropertyValue                                      */
      /* -------------------------------------------------------------------- */
      if (psGetPropertyValue) {
        CPLXMLNode *psIter;

        wfsparams->pszRequest = msStrdup("GetPropertyValue");

        pszValue = CPLGetXMLValue(psGetPropertyValue, "valueReference", NULL);
        if (pszValue)
          wfsparams->pszValueReference = msStrdup(pszValue);

        pszValue = CPLGetXMLValue(psGetPropertyValue, "resultType", NULL);
        if (pszValue)
          wfsparams->pszResultType = msStrdup(pszValue);

        pszValue = CPLGetXMLValue(psGetPropertyValue, "count", NULL);
        if (pszValue)
          wfsparams->nMaxFeatures = atoi(pszValue);

        pszValue = CPLGetXMLValue(psGetPropertyValue, "startIndex", NULL);
        if (pszValue)
          wfsparams->nStartIndex = atoi(pszValue);

        pszValue = CPLGetXMLValue(psGetPropertyValue, "outputFormat", NULL);
        if (pszValue)
          wfsparams->pszOutputFormat = msStrdup(pszValue);

        psIter = psGetPropertyValue->psChild;
        while (psIter != NULL) {
          if (psIter->eType == CXT_Element &&
              strcmp(psIter->pszValue, "Query") == 0) {
            msWFSParseXMLQueryNode(psIter, wfsparams);
            /* Just one is allowed for GetPropertyValue */
            break;
          } else if (psIter->eType == CXT_Element &&
                     strcmp(psIter->pszValue, "StoredQuery") == 0) {
            int status = msWFSParseXMLStoredQueryNode(map, wfsparams, psIter);
            if (status != MS_SUCCESS) {
              CPLDestroyXMLNode(psRoot);
              msFree(pszSchemaLocation);
              return status;
            }
            wfsparams->bHasPostStoredQuery = MS_TRUE;
            /* Just one is allowed for GetPropertyValue */
            break;
          }
          psIter = psIter->psNext;
        }

        msWFSSimplifyPropertyNameAndFilter(wfsparams);
      } /* end of GetPropertyValue */

      /* -------------------------------------------------------------------- */
      /*      Parse GetCapabilities.                                          */
      /* -------------------------------------------------------------------- */
      if (psGetCapabilities) {
        CPLXMLNode *psAcceptVersions;
        CPLXMLNode *psSections;

        wfsparams->pszRequest = msStrdup("GetCapabilities");

        pszValue = CPLGetXMLValue(psGetCapabilities, "updateSequence", NULL);
        if (pszValue)
          wfsparams->pszUpdateSequence = msStrdup(pszValue);

        /* version is optional for the GetCapabilities. If not */
        /* provided, set it. */
        if (wfsparams->pszVersion == NULL)
          wfsparams->pszVersion = msStrdup(msWFSGetDefaultVersion(map));

        psAcceptVersions = CPLGetXMLNode(psGetCapabilities, "AcceptVersions");
        if (psAcceptVersions != NULL) {
          CPLXMLNode *psIter = psAcceptVersions->psChild;
          while (psIter != NULL) {
            if (psIter->eType == CXT_Element &&
                strcmp(psIter->pszValue, "Version") == 0) {
              pszValue = CPLGetXMLValue(psIter, NULL, NULL);
              if (pszValue) {
                msWFSBuildParamList(&(wfsparams->pszAcceptVersions), pszValue,
                                    ",");
              }
            }
            psIter = psIter->psNext;
          }
        }

        psSections = CPLGetXMLNode(psGetCapabilities, "Sections");
        if (psSections != NULL) {
          CPLXMLNode *psIter = psSections->psChild;
          while (psIter != NULL) {
            if (psIter->eType == CXT_Element &&
                strcmp(psIter->pszValue, "Section") == 0) {
              pszValue = CPLGetXMLValue(psIter, NULL, NULL);
              if (pszValue) {
                msWFSBuildParamList(&(wfsparams->pszSections), pszValue, ",");
              }
            }
            psIter = psIter->psNext;
          }
        }
      } /* end of GetCapabilities */
      /* -------------------------------------------------------------------- */
      /*      Parse DescribeFeatureType                                       */
      /* -------------------------------------------------------------------- */
      if (psDescribeFeature) {
        CPLXMLNode *psIter;
        wfsparams->pszRequest = msStrdup("DescribeFeatureType");

        pszValue = CPLGetXMLValue(psDescribeFeature, "outputFormat", NULL);
        if (pszValue)
          wfsparams->pszOutputFormat = msStrdup(pszValue);

        psIter = CPLGetXMLNode(psDescribeFeature, "TypeName");
        if (psIter) {
          /* free typname and filter. There may have been */
          /* values if they were passed in the URL */
          if (wfsparams->pszTypeName)
            free(wfsparams->pszTypeName);
          wfsparams->pszTypeName = NULL;

          while (psIter) {
            if (psIter->eType == CXT_Element &&
                strcasecmp(psIter->pszValue, "TypeName") == 0) {
              pszValue = CPLGetXMLValue(psIter, NULL, NULL);
              if (pszValue) {
                msWFSBuildParamList(&(wfsparams->pszTypeName), pszValue, ",");
              }
            }
            psIter = psIter->psNext;
          }
        }

      } /* end of DescribeFeatureType */

      /* -------------------------------------------------------------------- */
      /*      Parse the ListStoredQueries                                     */
      /* -------------------------------------------------------------------- */
      if (psListStoredQueries) {
        wfsparams->pszRequest = msStrdup("ListStoredQueries");
      } /* end of ListStoredQueries */

      /* -------------------------------------------------------------------- */
      /*      Parse the DescribeStoredQueries                                 */
      /* -------------------------------------------------------------------- */
      if (psDescribeStoredQueries) {
        CPLXMLNode *psIter;

        wfsparams->pszRequest = msStrdup("DescribeStoredQueries");

        psIter = CPLGetXMLNode(psDescribeStoredQueries, "StoredQueryId");
        while (psIter) {
          if (psIter->eType == CXT_Element &&
              strcasecmp(psIter->pszValue, "StoredQueryId") == 0) {
            pszValue = CPLGetXMLValue(psIter, NULL, NULL);
            if (pszValue) {
              msWFSBuildParamList(&(wfsparams->pszStoredQueryId), pszValue,
                                  ",");
            }
          }
          psIter = psIter->psNext;
        }
      } /* end of DescribeStoredQueries */

      CPLDestroyXMLNode(psRoot);
    }

#if defined(USE_LIBXML2)
    {
      const char *schema_location = NULL, *validate = NULL;

      /*do we validate the xml ?*/
      validate =
          msOWSLookupMetadata(&(map->web.metadata), "FO", "validate_xml");
      if (validate && strcasecmp(validate, "true") == 0 &&
          (schema_location = msOWSLookupMetadata(&(map->web.metadata), "FO",
                                                 "schemas_dir"))) {
        if ((wfsparams->pszService &&
             strcmp(wfsparams->pszService, "WFS") == 0) ||
            force_wfs_mode) {
          char *schema_file = NULL;
          if (pszSchemaLocation != NULL &&
              strstr(pszSchemaLocation, "wfs/1.0") != NULL) {
            schema_file = msStringConcatenate(schema_file, schema_location);
            schema_file = msStringConcatenate(
                schema_file, MS_OWSCOMMON_WFS_10_SCHEMA_LOCATION);
          } else if (pszSchemaLocation != NULL &&
                     strstr(pszSchemaLocation, "wfs/1.1") != NULL) {
            schema_file = msStringConcatenate(schema_file, schema_location);
            schema_file = msStringConcatenate(
                schema_file, MS_OWSCOMMON_WFS_11_SCHEMA_LOCATION);
          } else if (pszSchemaLocation != NULL &&
                     strstr(pszSchemaLocation, "wfs/2.0") != NULL) {
            schema_file = msStringConcatenate(schema_file, schema_location);
            schema_file = msStringConcatenate(
                schema_file, MS_OWSCOMMON_WFS_20_SCHEMA_LOCATION);
          }
          if (schema_file != NULL) {
            if (msOWSSchemaValidation(schema_file, request->postrequest) != 0) {
              msSetError(MS_WFSERR, "Invalid POST request.  XML is not valid",
                         "msWFSParseRequest()");
              msFree(schema_file);
              return msWFSException(map, "request", "InvalidRequest", NULL);
            }
            msFree(schema_file);
          }
        }
      }
    }
#endif

    msFree(pszSchemaLocation);
  }

#else
  (void)map;
  (void)request;
  (void)wfsparams;
  (void)force_wfs_mode;
#endif
  return MS_SUCCESS;
}

/* msIsLayerSupportedForWFSOrOAPIF()
**
** Returns true (1) is this layer meets the requirements to be served as
** a WFS feature type or OGC API Features.
*/
int msIsLayerSupportedForWFSOrOAPIF(layerObj *lp) {
  /* In order to be supported, lp->type must be specified, even for
  ** layers that are OGR, SDE, SDO, etc connections.
  */
  if ((lp->type == MS_LAYER_POINT || lp->type == MS_LAYER_LINE ||
       lp->type == MS_LAYER_POLYGON) &&
      lp->connectiontype != MS_WMS && lp->connectiontype != MS_GRATICULE) {
    return 1; /* true */
  }

  return 0; /* false */
}
