/**
* Copyright (C) 2010 Zhang, Guilin <guilin.zhang@hotmail.com>
*
* Licensed 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.
*/
package com.google.code.http4j.impl;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import com.google.code.http4j.HTTP;
import com.google.code.http4j.Header;
import com.google.code.http4j.Headers;
import com.google.code.http4j.Parser;
import com.google.code.http4j.Response;
import com.google.code.http4j.StatusLine;
import com.google.code.http4j.utils.IOUtils;
/**
* @author <a href="mailto:guilin.zhang@hotmail.com">Zhang, Guilin</a>
*
*/
public final class ResponseParser implements Parser<Response, InputStream> {
@Override
public Response parse(InputStream in) throws IOException {
StatusLine line = parseStatusLine(in);
List<Header> headers = parseHeaders(in);
return createResponse(line, headers, in);
}
private Response createResponse(StatusLine line, List<Header> headers, InputStream in) throws IOException {
return Headers.isChunked(headers) ? new ChunkedResponse(line, headers, in) : new IdentityResponse(line, headers, in);
}
private List<Header> parseHeaders(InputStream in) throws IOException {
byte[] source = IOUtils.extractByEnd(in, HTTP.CR, HTTP.LF, HTTP.CR, HTTP.LF);
Parser<List<Header>, byte[]> parser = new HeadersParser();
return parser.parse(source);
}
private StatusLine parseStatusLine(InputStream in) throws IOException {
byte[] line = IOUtils.extractByEnd(in, HTTP.CR, HTTP.LF);
Parser<StatusLine, byte[]> parser = new StatusLineParser();
return parser.parse(line);
}
}