/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.impl.io;
import java.io.IOException;
import org.apache.http.HttpException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseFactory;
import org.apache.http.NoHttpResponseException;
import org.apache.http.StatusLine;
import org.apache.http.ParseException;
import org.apache.http.annotation.NotThreadSafe;
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 response 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 4.0
*/
@NotThreadSafe
public class HttpResponseParser extends AbstractMessageParser<HttpResponse> {
private final HttpResponseFactory responseFactory;
private final CharArrayBuffer lineBuf;
/**
* Creates an instance of this class.
*
* @param buffer the session input buffer.
* @param parser the line parser.
* @param responseFactory the factory to use to create
* {@link HttpResponse}s.
* @param params HTTP parameters.
*/
public HttpResponseParser(
final SessionInputBuffer buffer,
final LineParser parser,
final HttpResponseFactory responseFactory,
final HttpParams params) {
super(buffer, parser, params);
if (responseFactory == null) {
throw new IllegalArgumentException("Response factory may not be null");
}
this.responseFactory = responseFactory;
this.lineBuf = new CharArrayBuffer(128);
}
@Override
protected HttpResponse parseHead(
final SessionInputBuffer sessionBuffer)
throws IOException, HttpException, ParseException {
this.lineBuf.clear();
int i = sessionBuffer.readLine(this.lineBuf);
if (i == -1) {
throw new NoHttpResponseException("The target server failed to respond");
}
//create the status line from the status string
ParserCursor cursor = new ParserCursor(0, this.lineBuf.length());
StatusLine statusline = lineParser.parseStatusLine(this.lineBuf, cursor);
return this.responseFactory.newHttpResponse(statusline, null);
}
}