michael@0: /*
michael@0:  * ====================================================================
michael@0:  * Licensed to the Apache Software Foundation (ASF) under one
michael@0:  * or more contributor license agreements.  See the NOTICE file
michael@0:  * distributed with this work for additional information
michael@0:  * regarding copyright ownership.  The ASF licenses this file
michael@0:  * to you under the Apache License, Version 2.0 (the
michael@0:  * "License"); you may not use this file except in compliance
michael@0:  * with the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *   http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing,
michael@0:  * software distributed under the License is distributed on an
michael@0:  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0:  * KIND, either express or implied.  See the License for the
michael@0:  * specific language governing permissions and limitations
michael@0:  * under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.impl.io;
michael@0: 
michael@0: import java.io.IOException;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.ConnectionClosedException;
michael@0: import ch.boye.httpclientandroidlib.HttpException;
michael@0: import ch.boye.httpclientandroidlib.HttpMessage;
michael@0: import ch.boye.httpclientandroidlib.HttpRequest;
michael@0: import ch.boye.httpclientandroidlib.HttpRequestFactory;
michael@0: import ch.boye.httpclientandroidlib.RequestLine;
michael@0: import ch.boye.httpclientandroidlib.ParseException;
michael@0: import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
michael@0: import ch.boye.httpclientandroidlib.message.LineParser;
michael@0: import ch.boye.httpclientandroidlib.message.ParserCursor;
michael@0: import ch.boye.httpclientandroidlib.params.HttpParams;
michael@0: import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
michael@0: 
michael@0: /**
michael@0:  * HTTP request parser that obtain its input from an instance
michael@0:  * of {@link SessionInputBuffer}.
michael@0:  * <p>
michael@0:  * The following parameters can be used to customize the behavior of this
michael@0:  * class:
michael@0:  * <ul>
michael@0:  *  <li>{@link ch.boye.httpclientandroidlib.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
michael@0:  *  <li>{@link ch.boye.httpclientandroidlib.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
michael@0:  * </ul>
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: public class HttpRequestParser extends AbstractMessageParser {
michael@0: 
michael@0:     private final HttpRequestFactory requestFactory;
michael@0:     private final CharArrayBuffer lineBuf;
michael@0: 
michael@0:     /**
michael@0:      * Creates an instance of this class.
michael@0:      *
michael@0:      * @param buffer the session input buffer.
michael@0:      * @param parser the line parser.
michael@0:      * @param requestFactory the factory to use to create
michael@0:      *    {@link HttpRequest}s.
michael@0:      * @param params HTTP parameters.
michael@0:      */
michael@0:     public HttpRequestParser(
michael@0:             final SessionInputBuffer buffer,
michael@0:             final LineParser parser,
michael@0:             final HttpRequestFactory requestFactory,
michael@0:             final HttpParams params) {
michael@0:         super(buffer, parser, params);
michael@0:         if (requestFactory == null) {
michael@0:             throw new IllegalArgumentException("Request factory may not be null");
michael@0:         }
michael@0:         this.requestFactory = requestFactory;
michael@0:         this.lineBuf = new CharArrayBuffer(128);
michael@0:     }
michael@0: 
michael@0:     protected HttpMessage parseHead(
michael@0:             final SessionInputBuffer sessionBuffer)
michael@0:         throws IOException, HttpException, ParseException {
michael@0: 
michael@0:         this.lineBuf.clear();
michael@0:         int i = sessionBuffer.readLine(this.lineBuf);
michael@0:         if (i == -1) {
michael@0:             throw new ConnectionClosedException("Client closed connection");
michael@0:         }
michael@0:         ParserCursor cursor = new ParserCursor(0, this.lineBuf.length());
michael@0:         RequestLine requestline = this.lineParser.parseRequestLine(this.lineBuf, cursor);
michael@0:         return this.requestFactory.newHttpRequest(requestline);
michael@0:     }
michael@0: 
michael@0: }