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
13namespace net {
14
15void 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