chrome/browser/net/preconnect.cc

   1 // Copyright (c) 2012 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 "chrome/browser/net/preconnect.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/metrics/histogram.h"
  10 #include "content/public/browser/browser_thread.h"
  11 #include "net/base/load_flags.h"
  12 #include "net/http/http_network_session.h"
  13 #include "net/http/http_request_info.h"
  14 #include "net/http/http_stream_factory.h"
  15 #include "net/http/http_transaction_factory.h"
  16 #include "net/log/net_log.h"
  17 #include "net/ssl/ssl_config_service.h"
  18 #include "net/url_request/http_user_agent_settings.h"
  19 #include "net/url_request/url_request_context.h"
  20 #include "net/url_request/url_request_context_getter.h"
  21
  22 using content::BrowserThread;
  23
  24 namespace chrome_browser_net {
  25
  26 void PreconnectOnUIThread(
  27     const GURL& url,
  28     const GURL& first_party_for_cookies,
  29     UrlInfo::ResolutionMotivation motivation,
  30     int count,
  31     net::URLRequestContextGetter* getter) {
  32   // Prewarm connection to Search URL.
  33   BrowserThread::PostTask(
  34       BrowserThread::IO, FROM_HERE,
  35       base::Bind(&PreconnectOnIOThread, url, first_party_for_cookies,
  36                  motivation, count, make_scoped_refptr(getter), true));
  37   return;
  38 }
  39
  40 void PreconnectOnIOThread(const GURL& url,
  41                           const GURL& first_party_for_cookies,
  42                           UrlInfo::ResolutionMotivation motivation,
  43                           int count,
  44                           net::URLRequestContextGetter* getter,
  45                           bool allow_credentials) {
  46   if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
  47     LOG(DFATAL) << "This must be run only on the IO thread.";
  48     return;
  49   }
  50   if (!getter)
  51     return;
  52   // We are now commited to doing the async preconnection call.
  53   UMA_HISTOGRAM_ENUMERATION("Net.PreconnectMotivation", motivation,
  54                             UrlInfo::MAX_MOTIVATED);
  55
  56   net::URLRequestContext* context = getter->GetURLRequestContext();
  57   net::HttpTransactionFactory* factory = context->http_transaction_factory();
  58   net::HttpNetworkSession* session = factory->GetSession();
  59
  60   std::string user_agent;
  61   if (context->http_user_agent_settings())
  62     user_agent = context->http_user_agent_settings()->GetUserAgent();
  63   net::HttpRequestInfo request_info;
  64   request_info.url = url;
  65   request_info.method = "GET";
  66   request_info.extra_headers.SetHeader(net::HttpRequestHeaders::kUserAgent,
  67                                        user_agent);
  68
  69   net::NetworkDelegate* delegate = context->network_delegate();
  70   if (delegate->CanEnablePrivacyMode(url, first_party_for_cookies))
  71     request_info.privacy_mode = net::PRIVACY_MODE_ENABLED;
  72
  73   // TODO(yoav): Fix this layering violation, since when credentials are not
  74   // allowed we should turn on a flag indicating that, rather then turn on
  75   // private mode, even if lower layers would treat both the same.
  76   if (!allow_credentials) {
  77     request_info.privacy_mode = net::PRIVACY_MODE_ENABLED;
  78     request_info.load_flags = net::LOAD_DO_NOT_SEND_COOKIES |
  79                               net::LOAD_DO_NOT_SAVE_COOKIES |
  80                               net::LOAD_DO_NOT_SEND_AUTH_DATA;
  81   }
  82
  83   // Translate the motivation from UrlRequest motivations to HttpRequest
  84   // motivations.
  85   switch (motivation) {
  86     case UrlInfo::OMNIBOX_MOTIVATED:
  87       request_info.motivation = net::HttpRequestInfo::OMNIBOX_MOTIVATED;
  88       break;
  89     case UrlInfo::LEARNED_REFERAL_MOTIVATED:
  90       request_info.motivation = net::HttpRequestInfo::PRECONNECT_MOTIVATED;
  91       break;
  92     case UrlInfo::MOUSE_OVER_MOTIVATED:
  93     case UrlInfo::SELF_REFERAL_MOTIVATED:
  94     case UrlInfo::EARLY_LOAD_MOTIVATED:
  95       request_info.motivation = net::HttpRequestInfo::EARLY_LOAD_MOTIVATED;
  96       break;
  97     default:
  98       // Other motivations should never happen here.
  99       NOTREACHED();
 100       break;
 101   }
 102
 103   // Setup the SSL Configuration.
 104   net::SSLConfig ssl_config;
 105   session->ssl_config_service()->GetSSLConfig(&ssl_config);
 106   session->GetNextProtos(&ssl_config.next_protos);
 107
 108   // All preconnects should perform EV certificate verification.
 109   ssl_config.verify_ev_cert = true;
 110
 111   net::HttpStreamFactory* http_stream_factory = session->http_stream_factory();
 112   http_stream_factory->PreconnectStreams(count, request_info, ssl_config,
 113                                          ssl_config);
 114 }
 115
 116 }  // namespace chrome_browser_net