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      1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "net/http/http_proxy_utils.h"
      6 
      7 #include "base/string_util.h"
      8 #include "googleurl/src/gurl.h"
      9 #include "net/base/host_port_pair.h"
     10 #include "net/base/net_util.h"
     11 #include "net/http/http_request_info.h"
     12 
     13 namespace net {
     14 
     15 void BuildTunnelRequest(
     16     const HttpRequestInfo& request_info,
     17     const HttpRequestHeaders& auth_headers,
     18     const HostPortPair& endpoint,
     19     std::string* request_line,
     20     HttpRequestHeaders* request_headers) {
     21   // RFC 2616 Section 9 says the Host request-header field MUST accompany all
     22   // HTTP/1.1 requests.  Add "Proxy-Connection: keep-alive" for compat with
     23   // HTTP/1.0 proxies such as Squid (required for NTLM authentication).
     24   *request_line = StringPrintf(
     25       "CONNECT %s HTTP/1.1\r\n", endpoint.ToString().c_str());
     26   request_headers->SetHeader(HttpRequestHeaders::kHost,
     27                              GetHostAndOptionalPort(request_info.url));
     28   request_headers->SetHeader(HttpRequestHeaders::kProxyConnection,
     29                              "keep-alive");
     30 
     31   std::string user_agent;
     32   if (request_info.extra_headers.GetHeader(HttpRequestHeaders::kUserAgent,
     33                                             &user_agent))
     34     request_headers->SetHeader(HttpRequestHeaders::kUserAgent, user_agent);
     35 
     36   request_headers->MergeFrom(auth_headers);
     37 }
     38 
     39 }  // namespace net
     40