net.swas.explorer.httpprofile.DefaultHttpRequestParser.java Source code

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Here is the source code for net.swas.explorer.httpprofile.DefaultHttpRequestParser.java

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/*
 * This file is part of WebSiren.
 *
 *  WebSiren is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
    
 *  WebSiren is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with WebSiren.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.swas.explorer.httpprofile;

import java.io.IOException;

import org.apache.http.ConnectionClosedException;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestFactory;
import org.apache.http.RequestLine;
import org.apache.http.ParseException;

import org.apache.http.impl.io.AbstractMessageParser;
import org.apache.http.io.SessionInputBuffer;
import org.apache.http.message.LineParser;
import org.apache.http.message.ParserCursor;
import org.apache.http.params.HttpParams;
import org.apache.http.util.CharArrayBuffer;

/**
 * HTTP request parser that obtain its input from an instance
 * of {@link SessionInputBuffer}.
 * <p>
 * The following parameters can be used to customize the behavior of this
 * class:
 * <ul>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
 * </ul>
 *
 * @since 4.2
 */

public class DefaultHttpRequestParser extends AbstractMessageParser {

    private final HttpRequestFactory requestFactory;
    private final CharArrayBuffer lineBuf;

    /**
     * Creates an instance of this class.
     *
     * @param buffer the session input buffer.
     * @param parser the line parser.
     * @param requestFactory the factory to use to create
     *    {@link HttpRequest}s.
     * @param params HTTP parameters.
     */
    public DefaultHttpRequestParser(final SessionInputBuffer buffer, final LineParser parser,
            final HttpRequestFactory requestFactory, final HttpParams params) {

        super(buffer, parser, params);
        if (requestFactory == null) {

            throw new IllegalArgumentException("Request factory may not be null");

        }

        this.requestFactory = requestFactory;
        this.lineBuf = new CharArrayBuffer(128);
        //this.buffer = buffer;
    }

    @Override
    protected HttpRequest parseHead(final SessionInputBuffer sessionBuffer)
            throws IOException, HttpException, ParseException {

        this.lineBuf.clear();
        int i = sessionBuffer.readLine(this.lineBuf);
        if (i == -1) {

            throw new ConnectionClosedException("Client closed connection");

        }

        ParserCursor cursor = new ParserCursor(0, this.lineBuf.length());
        RequestLine requestline = this.lineParser.parseRequestLine(this.lineBuf, cursor);

        return this.requestFactory.newHttpRequest(requestline);

    }

}