001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.client.protocol; 029 030import java.io.IOException; 031import java.util.Collection; 032 033import org.apache.http.Header; 034import org.apache.http.HttpException; 035import org.apache.http.HttpRequest; 036import org.apache.http.HttpRequestInterceptor; 037import org.apache.http.annotation.Contract; 038import org.apache.http.annotation.ThreadingBehavior; 039import org.apache.http.client.params.ClientPNames; 040import org.apache.http.protocol.HttpContext; 041import org.apache.http.util.Args; 042 043/** 044 * Request interceptor that adds default request headers. 045 * 046 * @since 4.0 047 */ 048@SuppressWarnings("deprecation") 049@Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL) 050public class RequestDefaultHeaders implements HttpRequestInterceptor { 051 052 private final Collection<? extends Header> defaultHeaders; 053 054 /** 055 * @since 4.3 056 */ 057 public RequestDefaultHeaders(final Collection<? extends Header> defaultHeaders) { 058 super(); 059 this.defaultHeaders = defaultHeaders; 060 } 061 062 public RequestDefaultHeaders() { 063 this(null); 064 } 065 066 @Override 067 public void process(final HttpRequest request, final HttpContext context) 068 throws HttpException, IOException { 069 Args.notNull(request, "HTTP request"); 070 071 final String method = request.getRequestLine().getMethod(); 072 if (method.equalsIgnoreCase("CONNECT")) { 073 return; 074 } 075 076 // Add default headers 077 @SuppressWarnings("unchecked") 078 Collection<? extends Header> defHeaders = (Collection<? extends Header>) 079 request.getParams().getParameter(ClientPNames.DEFAULT_HEADERS); 080 if (defHeaders == null) { 081 defHeaders = this.defaultHeaders; 082 } 083 084 if (defHeaders != null) { 085 for (final Header defHeader : defHeaders) { 086 request.addHeader(defHeader); 087 } 088 } 089 } 090 091}