| // Copyright 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 "webkit/user_agent/user_agent.h" |
| |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/string_util.h" |
| #include "base/stringprintf.h" |
| #include "base/synchronization/lock.h" |
| #include "webkit/user_agent/user_agent_util.h" |
| |
| namespace webkit_glue { |
| |
| namespace { |
| |
| class UserAgentState { |
| public: |
| UserAgentState(); |
| ~UserAgentState(); |
| |
| void Set(const std::string& user_agent, bool overriding); |
| const std::string& Get(const GURL& url) const; |
| |
| private: |
| mutable std::string user_agent_; |
| // The UA string when we're pretending to be Mac Safari or Win Firefox. |
| mutable std::string user_agent_for_spoofing_hack_; |
| |
| mutable bool user_agent_requested_; |
| bool user_agent_is_overridden_; |
| |
| // This object can be accessed from multiple threads, so use a lock around |
| // accesses to the data members. |
| mutable base::Lock lock_; |
| }; |
| |
| UserAgentState::UserAgentState() |
| : user_agent_requested_(false), |
| user_agent_is_overridden_(false) { |
| } |
| |
| UserAgentState::~UserAgentState() { |
| } |
| |
| void UserAgentState::Set(const std::string& user_agent, bool overriding) { |
| base::AutoLock auto_lock(lock_); |
| if (user_agent == user_agent_) { |
| // We allow the user agent to be set multiple times as long as it |
| // is set to the same value, in order to simplify unit testing |
| // given g_user_agent is a global. |
| return; |
| } |
| DCHECK(!user_agent.empty()); |
| DCHECK(!user_agent_requested_) << "Setting the user agent after someone has " |
| "already requested it can result in unexpected behavior."; |
| user_agent_is_overridden_ = overriding; |
| user_agent_ = user_agent; |
| } |
| |
| bool IsMicrosoftSiteThatNeedsSpoofingForSilverlight(const GURL& url) { |
| #if defined(OS_MACOSX) |
| // The landing page for updating Silverlight gives a confusing experience |
| // in browsers that Silverlight doesn't officially support; spoof as |
| // Safari to reduce the chance that users won't complete updates. |
| // Should be removed if the sniffing is removed: http://crbug.com/88211 |
| if (url.host() == "www.microsoft.com" && |
| StartsWithASCII(url.path(), "/getsilverlight", false)) { |
| return true; |
| } |
| #endif |
| return false; |
| } |
| |
| bool IsYahooSiteThatNeedsSpoofingForSilverlight(const GURL& url) { |
| #if defined(OS_MACOSX) || defined(OS_WIN) |
| // The following Yahoo! JAPAN pages erroneously judge that Silverlight does |
| // not support Chromium. Until the pages are fixed, spoof the UA. |
| // http://crbug.com/104426 |
| if (url.host() == "headlines.yahoo.co.jp" && |
| StartsWithASCII(url.path(), "/videonews/", true)) { |
| return true; |
| } |
| #endif |
| #if defined(OS_MACOSX) |
| if ((url.host() == "downloads.yahoo.co.jp" && |
| StartsWithASCII(url.path(), "/docs/silverlight/", true)) || |
| url.host() == "gyao.yahoo.co.jp") { |
| return true; |
| } |
| #elif defined(OS_WIN) |
| if ((url.host() == "weather.yahoo.co.jp" && |
| StartsWithASCII(url.path(), "/weather/zoomradar/", true)) || |
| url.host() == "promotion.shopping.yahoo.co.jp" || |
| url.host() == "pokemon.kids.yahoo.co.jp") { |
| return true; |
| } |
| #endif |
| return false; |
| } |
| |
| const std::string& UserAgentState::Get(const GURL& url) const { |
| base::AutoLock auto_lock(lock_); |
| user_agent_requested_ = true; |
| |
| DCHECK(!user_agent_.empty()); |
| |
| // Workarounds for sites that use misguided UA sniffing. |
| if (!user_agent_is_overridden_) { |
| if (IsMicrosoftSiteThatNeedsSpoofingForSilverlight(url) || |
| IsYahooSiteThatNeedsSpoofingForSilverlight(url)) { |
| if (user_agent_for_spoofing_hack_.empty()) { |
| #if defined(OS_MACOSX) |
| user_agent_for_spoofing_hack_ = |
| BuildUserAgentFromProduct("Version/5.1.1 Safari/534.51.22"); |
| #elif defined(OS_WIN) |
| // Pretend to be Firefox. Silverlight doesn't support Win Safari. |
| base::StringAppendF( |
| &user_agent_for_spoofing_hack_, |
| "Mozilla/5.0 (%s) Gecko/20100101 Firefox/8.0", |
| webkit_glue::BuildOSCpuInfo().c_str()); |
| #endif |
| } |
| DCHECK(!user_agent_for_spoofing_hack_.empty()); |
| return user_agent_for_spoofing_hack_; |
| } |
| } |
| |
| return user_agent_; |
| } |
| |
| base::LazyInstance<UserAgentState> g_user_agent = LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| void SetUserAgent(const std::string& user_agent, bool overriding) { |
| g_user_agent.Get().Set(user_agent, overriding); |
| } |
| |
| const std::string& GetUserAgent(const GURL& url) { |
| return g_user_agent.Get().Get(url); |
| } |
| |
| } // namespace webkit_glue |