
/*
 * de.unkrig.commons - A general-purpose Java class library
 *
 * Copyright (c) 2012, Arno Unkrig
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *       following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *       following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package de.unkrig.commons.net.http;

import java.io.Closeable;
import java.io.IOException;
import java.net.InetAddress;
import java.util.logging.Logger;

import de.unkrig.commons.net.TcpClient;

/**
 * Implementation of an HTTP client.
 *
 * @see #HttpClient(InetAddress, int)
 */
public final
class HttpClient implements Closeable {

    private static final Logger LOGGER = Logger.getLogger(HttpClient.class.getName());

    private final TcpClient tcpClient;

    /**
     * @see #HttpClient(InetAddress, int)
     */
    public
    HttpClient(String host, int port) throws IOException {
        this(InetAddress.getByName(host), port);
    }

    /**
     * Connects to the given <var>address</var> and <var>port</var>.
     */
    public
    HttpClient(InetAddress address, int port) throws IOException {
        this.tcpClient = new TcpClient(address, port);
    }

    /**
     * Sends the given <var>httpRequest</var> to the server, waits for the response from the server.
     *
     * @return The parsed response from the server
     */
    public HttpResponse
    call(HttpRequest httpRequest) throws IOException {
        return this.call(httpRequest, "<<< ", ">>> ");
    }

    /**
     * Sends the given <var>httpRequest</var> to the server, waits for the response from the server.
     *
     * @param writeRequestLoggingPrefix E.g. {@code "<<< "}
     * @param readResponseLoggingPrefix E.g. {@code ">>> "}
     * @return                          The parsed response from the server
     */
    public HttpResponse
    call(
        HttpRequest httpRequest,
        String      writeRequestLoggingPrefix,
        String      readResponseLoggingPrefix
    ) throws IOException {

        httpRequest.write(this.tcpClient.getOutputStream(), writeRequestLoggingPrefix);

        return HttpResponse.read(
            this.tcpClient.getInputStream(), // in
            httpRequest.getHttpVersion(),    // httpVersion
            httpRequest.getMethod(),         // requestMethod
            readResponseLoggingPrefix        // loggingPrefix
        );
    }

    @Override public void
    close() throws IOException {

        LOGGER.fine("Disposing connection to " + this.tcpClient.getRemoteSocketAddress());

        this.tcpClient.close();
    }
}
