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Java example source code file (RequestClientConnControl.java)
The RequestClientConnControl.java example source code/* * ==================================================================== * 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.client.protocol; import java.io.IOException; import org.apache.http.annotation.Immutable; import org.apache.http.HttpException; import org.apache.http.HttpRequest; import org.apache.http.HttpRequestInterceptor; import org.apache.http.conn.ManagedClientConnection; import org.apache.http.conn.routing.HttpRoute; import org.apache.http.protocol.ExecutionContext; import org.apache.http.protocol.HTTP; import org.apache.http.protocol.HttpContext; /** * This protocol interceptor is responsible for adding <code>Connection * or <code>Proxy-Connection headers to the outgoing requests, which * is essential for managing persistence of <code>HTTP/1.0 connections. * * @since 4.0 */ @Immutable public class RequestClientConnControl implements HttpRequestInterceptor { private static final String PROXY_CONN_DIRECTIVE = "Proxy-Connection"; public RequestClientConnControl() { super(); } public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException { if (request == null) { throw new IllegalArgumentException("HTTP request may not be null"); } String method = request.getRequestLine().getMethod(); if (method.equalsIgnoreCase("CONNECT")) { request.setHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); return; } // Obtain the client connection (required) ManagedClientConnection conn = (ManagedClientConnection) context.getAttribute( ExecutionContext.HTTP_CONNECTION); if (conn == null) { throw new IllegalStateException("Client connection not specified in HTTP context"); } HttpRoute route = conn.getRoute(); if (route.getHopCount() == 1 || route.isTunnelled()) { if (!request.containsHeader(HTTP.CONN_DIRECTIVE)) { request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); } } if (route.getHopCount() == 2 && !route.isTunnelled()) { if (!request.containsHeader(PROXY_CONN_DIRECTIVE)) { request.addHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); } } } } Other Java examples (source code examples)Here is a short list of links related to this Java RequestClientConnControl.java source code file: |
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