/*
* $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpcore/tags/4.0-alpha2/src/java/org/apache/http/protocol/ResponseConnControl.java $
* $Revision: 408172 $
* $Date: 2006-05-21 16:06:29 +0200 (Sun, 21 May 2006) $
*
* ====================================================================
*
* Copyright 1999-2006 The Apache Software Foundation
*
* 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.
* ====================================================================
*
* 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.protocol;
import java.io.IOException;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.HttpStatus;
import org.apache.http.HttpVersion;
/**
* A response interceptor that suggests connection keep-alive to the client.
* For use on the server side.
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @version $Revision: 408172 $
*
* @since 4.0
*/
public class ResponseConnControl implements HttpResponseInterceptor {
public ResponseConnControl() {
super();
}
public void process(final HttpResponse response, final HttpContext context)
throws HttpException, IOException {
if (response == null) {
throw new IllegalArgumentException("HTTP request may not be null");
}
if (context == null) {
throw new IllegalArgumentException("HTTP context may not be null");
}
// Always drop connection after certain type of responses
int status = response.getStatusLine().getStatusCode();
if (status == HttpStatus.SC_BAD_REQUEST ||
status == HttpStatus.SC_REQUEST_TIMEOUT ||
status == HttpStatus.SC_LENGTH_REQUIRED ||
status == HttpStatus.SC_REQUEST_TOO_LONG ||
status == HttpStatus.SC_REQUEST_URI_TOO_LONG ||
status == HttpStatus.SC_INTERNAL_SERVER_ERROR ||
status == HttpStatus.SC_SERVICE_UNAVAILABLE ||
status == HttpStatus.SC_NOT_IMPLEMENTED) {
response.setHeader(new GeneratedHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE));
return;
}
// Always drop connection for HTTP/1.0 responses and below
// if the content body cannot be correctly delimited
HttpEntity entity = response.getEntity();
if (entity != null) {
HttpVersion ver = response.getStatusLine().getHttpVersion();
if (entity.getContentLength() < 0 &&
(!entity.isChunked() || ver.lessEquals(HttpVersion.HTTP_1_0))) {
response.setHeader(new GeneratedHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE));
return;
}
}
// Drop connection if requested by the client
HttpRequest request = (HttpRequest) context.getAttribute(HttpContext.HTTP_REQUEST);
Header header = request.getFirstHeader(HTTP.CONN_DIRECTIVE);
if (header != null) {
response.setHeader(new GeneratedHeader(HTTP.CONN_DIRECTIVE, header.getValue()));
}
}
}