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99 lines
4.0 KiB
Java
99 lines
4.0 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.protocol;
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import java.io.IOException;
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import ch.boye.httpclientandroidlib.Header;
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import ch.boye.httpclientandroidlib.HttpEntity;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpRequest;
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import ch.boye.httpclientandroidlib.HttpResponse;
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import ch.boye.httpclientandroidlib.HttpResponseInterceptor;
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import ch.boye.httpclientandroidlib.HttpStatus;
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import ch.boye.httpclientandroidlib.HttpVersion;
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import ch.boye.httpclientandroidlib.ProtocolVersion;
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/**
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* ResponseConnControl is responsible for adding <code>Connection</code> header
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* to the outgoing responses, which is essential for managing persistence of
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* <code>HTTP/1.0</code> connections. This interceptor is recommended for
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* server side protocol processors.
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*
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* @since 4.0
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*/
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public class ResponseConnControl implements HttpResponseInterceptor {
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public ResponseConnControl() {
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super();
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}
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public void process(final HttpResponse response, final HttpContext context)
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throws HttpException, IOException {
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if (response == null) {
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throw new IllegalArgumentException("HTTP response may not be null");
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}
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if (context == null) {
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throw new IllegalArgumentException("HTTP context may not be null");
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}
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// Always drop connection after certain type of responses
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int status = response.getStatusLine().getStatusCode();
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if (status == HttpStatus.SC_BAD_REQUEST ||
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status == HttpStatus.SC_REQUEST_TIMEOUT ||
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status == HttpStatus.SC_LENGTH_REQUIRED ||
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status == HttpStatus.SC_REQUEST_TOO_LONG ||
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status == HttpStatus.SC_REQUEST_URI_TOO_LONG ||
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status == HttpStatus.SC_SERVICE_UNAVAILABLE ||
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status == HttpStatus.SC_NOT_IMPLEMENTED) {
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response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
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return;
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}
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// Always drop connection for HTTP/1.0 responses and below
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// if the content body cannot be correctly delimited
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HttpEntity entity = response.getEntity();
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if (entity != null) {
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ProtocolVersion ver = response.getStatusLine().getProtocolVersion();
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if (entity.getContentLength() < 0 &&
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(!entity.isChunked() || ver.lessEquals(HttpVersion.HTTP_1_0))) {
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response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
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return;
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}
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}
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// Drop connection if requested by the client
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HttpRequest request = (HttpRequest)
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context.getAttribute(ExecutionContext.HTTP_REQUEST);
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if (request != null) {
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Header header = request.getFirstHeader(HTTP.CONN_DIRECTIVE);
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if (header != null) {
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response.setHeader(HTTP.CONN_DIRECTIVE, header.getValue());
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}
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}
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}
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}
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