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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/net/preconnect.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/load_flags.h"
#include "net/http/http_network_session.h"
#include "net/http/http_request_info.h"
#include "net/http/http_stream_factory.h"
#include "net/http/http_transaction_factory.h"
#include "net/log/net_log.h"
#include "net/ssl/ssl_config_service.h"
#include "net/url_request/http_user_agent_settings.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
using content::BrowserThread;
namespace chrome_browser_net {
void PreconnectOnUIThread(
const GURL& url,
const GURL& first_party_for_cookies,
UrlInfo::ResolutionMotivation motivation,
int count,
net::URLRequestContextGetter* getter) {
// Prewarm connection to Search URL.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&PreconnectOnIOThread, url, first_party_for_cookies,
motivation, count, make_scoped_refptr(getter), true));
return;
}
void PreconnectOnIOThread(const GURL& url,
const GURL& first_party_for_cookies,
UrlInfo::ResolutionMotivation motivation,
int count,
net::URLRequestContextGetter* getter,
bool allow_credentials) {
if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
LOG(DFATAL) << "This must be run only on the IO thread.";
return;
}
if (!getter)
return;
// We are now commited to doing the async preconnection call.
UMA_HISTOGRAM_ENUMERATION("Net.PreconnectMotivation", motivation,
UrlInfo::MAX_MOTIVATED);
net::URLRequestContext* context = getter->GetURLRequestContext();
net::HttpTransactionFactory* factory = context->http_transaction_factory();
net::HttpNetworkSession* session = factory->GetSession();
std::string user_agent;
if (context->http_user_agent_settings())
user_agent = context->http_user_agent_settings()->GetUserAgent();
net::HttpRequestInfo request_info;
request_info.url = url;
request_info.method = "GET";
request_info.extra_headers.SetHeader(net::HttpRequestHeaders::kUserAgent,
user_agent);
net::NetworkDelegate* delegate = context->network_delegate();
if (delegate->CanEnablePrivacyMode(url, first_party_for_cookies))
request_info.privacy_mode = net::PRIVACY_MODE_ENABLED;
// TODO(yoav): Fix this layering violation, since when credentials are not
// allowed we should turn on a flag indicating that, rather then turn on
// private mode, even if lower layers would treat both the same.
if (!allow_credentials) {
request_info.privacy_mode = net::PRIVACY_MODE_ENABLED;
request_info.load_flags = net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SAVE_COOKIES |
net::LOAD_DO_NOT_SEND_AUTH_DATA;
}
// Translate the motivation from UrlRequest motivations to HttpRequest
// motivations.
switch (motivation) {
case UrlInfo::OMNIBOX_MOTIVATED:
request_info.motivation = net::HttpRequestInfo::OMNIBOX_MOTIVATED;
break;
case UrlInfo::LEARNED_REFERAL_MOTIVATED:
request_info.motivation = net::HttpRequestInfo::PRECONNECT_MOTIVATED;
break;
case UrlInfo::MOUSE_OVER_MOTIVATED:
case UrlInfo::SELF_REFERAL_MOTIVATED:
case UrlInfo::EARLY_LOAD_MOTIVATED:
request_info.motivation = net::HttpRequestInfo::EARLY_LOAD_MOTIVATED;
break;
default:
// Other motivations should never happen here.
NOTREACHED();
break;
}
// Setup the SSL Configuration.
net::SSLConfig ssl_config;
session->ssl_config_service()->GetSSLConfig(&ssl_config);
session->GetAlpnProtos(&ssl_config.alpn_protos);
session->GetNpnProtos(&ssl_config.npn_protos);
// All preconnects should perform EV certificate verification.
ssl_config.verify_ev_cert = true;
net::HttpStreamFactory* http_stream_factory = session->http_stream_factory();
http_stream_factory->PreconnectStreams(count, request_info, ssl_config,
ssl_config);
}
} // namespace chrome_browser_net
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