net/http/http_server_properties_manager.h

   1 // Copyright 2014 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 #ifndef NET_HTTP_HTTP_SERVER_PROPERTIES_MANAGER_H_
   6 #define NET_HTTP_HTTP_SERVER_PROPERTIES_MANAGER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "base/prefs/pref_change_registrar.h"
  16 #include "base/timer/timer.h"
  17 #include "base/values.h"
  18 #include "net/base/host_port_pair.h"
  19 #include "net/http/http_server_properties.h"
  20 #include "net/http/http_server_properties_impl.h"
  21
  22 class PrefService;
  23
  24 namespace base {
  25 class SequencedTaskRunner;
  26 }
  27
  28 namespace net {
  29
  30 ////////////////////////////////////////////////////////////////////////////////
  31 // HttpServerPropertiesManager
  32
  33 // The manager for creating and updating an HttpServerProperties (for example it
  34 // tracks if a server supports SPDY or not).
  35 //
  36 // This class interacts with both the pref thread, where notifications of pref
  37 // changes are received from, and the network thread, which owns it, and it
  38 // persists the changes from network stack whether server supports SPDY or not.
  39 //
  40 // It must be constructed on the pref thread, to set up |pref_task_runner_| and
  41 // the prefs listeners.
  42 //
  43 // ShutdownOnPrefThread must be called from pref thread before destruction, to
  44 // release the prefs listeners on the pref thread.
  45 //
  46 // Class requires that update tasks from the Pref thread can post safely to the
  47 // network thread, so the destruction order must guarantee that if |this|
  48 // exists in pref thread, then a potential destruction on network thread will
  49 // come after any task posted to network thread from that method on pref thread.
  50 // This is used to go through network thread before the actual update starts,
  51 // and grab a WeakPtr.
  52 class NET_EXPORT HttpServerPropertiesManager : public HttpServerProperties {
  53  public:
  54   // Create an instance of the HttpServerPropertiesManager. The lifetime of the
  55   // PrefService objects must be longer than that of the
  56   // HttpServerPropertiesManager object. Must be constructed on the Pref thread.
  57   HttpServerPropertiesManager(
  58       PrefService* pref_service,
  59       const char* pref_path,
  60       scoped_refptr<base::SequencedTaskRunner> network_task_runner);
  61   ~HttpServerPropertiesManager() override;
  62
  63   // Initialize on Network thread.
  64   void InitializeOnNetworkThread();
  65
  66   // Prepare for shutdown. Must be called on the Pref thread before destruction.
  67   void ShutdownOnPrefThread();
  68
  69   // Helper function for unit tests to set the version in the dictionary.
  70   static void SetVersion(base::DictionaryValue* http_server_properties_dict,
  71                          int version_number);
  72
  73   // Deletes all data. Works asynchronously, but if a |completion| callback is
  74   // provided, it will be fired on the pref thread when everything is done.
  75   void Clear(const base::Closure& completion);
  76
  77   // ----------------------------------
  78   // HttpServerProperties methods:
  79   // ----------------------------------
  80
  81   base::WeakPtr<HttpServerProperties> GetWeakPtr() override;
  82   void Clear() override;
  83   bool SupportsRequestPriority(const HostPortPair& server) override;
  84   bool GetSupportsSpdy(const HostPortPair& server) override;
  85   void SetSupportsSpdy(const HostPortPair& server, bool support_spdy) override;
  86   bool RequiresHTTP11(const HostPortPair& server) override;
  87   void SetHTTP11Required(const HostPortPair& server) override;
  88   void MaybeForceHTTP11(const HostPortPair& server,
  89                         SSLConfig* ssl_config) override;
  90   AlternativeServiceVector GetAlternativeServices(
  91       const HostPortPair& origin) override;
  92   bool SetAlternativeService(const HostPortPair& origin,
  93                              const AlternativeService& alternative_service,
  94                              double alternative_probability,
  95                              base::Time expiration) override;
  96   bool SetAlternativeServices(const HostPortPair& origin,
  97                               const AlternativeServiceInfoVector&
  98                                   alternative_service_info_vector) override;
  99   void MarkAlternativeServiceBroken(
 100       const AlternativeService& alternative_service) override;
 101   void MarkAlternativeServiceRecentlyBroken(
 102       const AlternativeService& alternative_service) override;
 103   bool IsAlternativeServiceBroken(
 104       const AlternativeService& alternative_service) const override;
 105   bool WasAlternativeServiceRecentlyBroken(
 106       const AlternativeService& alternative_service) override;
 107   void ConfirmAlternativeService(
 108       const AlternativeService& alternative_service) override;
 109   void ClearAlternativeServices(const HostPortPair& origin) override;
 110   const AlternativeServiceMap& alternative_service_map() const override;
 111   scoped_ptr<base::Value> GetAlternativeServiceInfoAsValue() const override;
 112   void SetAlternativeServiceProbabilityThreshold(double threshold) override;
 113   const SettingsMap& GetSpdySettings(
 114       const HostPortPair& host_port_pair) override;
 115   bool SetSpdySetting(const HostPortPair& host_port_pair,
 116                       SpdySettingsIds id,
 117                       SpdySettingsFlags flags,
 118                       uint32 value) override;
 119   void ClearSpdySettings(const HostPortPair& host_port_pair) override;
 120   void ClearAllSpdySettings() override;
 121   const SpdySettingsMap& spdy_settings_map() const override;
 122   bool GetSupportsQuic(IPAddressNumber* last_address) const override;
 123   void SetSupportsQuic(bool used_quic,
 124                        const IPAddressNumber& last_address) override;
 125   void SetServerNetworkStats(const HostPortPair& host_port_pair,
 126                              ServerNetworkStats stats) override;
 127   const ServerNetworkStats* GetServerNetworkStats(
 128       const HostPortPair& host_port_pair) override;
 129   const ServerNetworkStatsMap& server_network_stats_map() const override;
 130
 131  protected:
 132   // The location where ScheduleUpdatePrefsOnNetworkThread was called.
 133   enum Location {
 134     SUPPORTS_SPDY = 0,
 135     HTTP_11_REQUIRED = 1,
 136     SET_ALTERNATIVE_SERVICES = 2,
 137     MARK_ALTERNATIVE_SERVICE_BROKEN = 3,
 138     MARK_ALTERNATIVE_SERVICE_RECENTLY_BROKEN = 4,
 139     CONFIRM_ALTERNATIVE_SERVICE = 5,
 140     CLEAR_ALTERNATIVE_SERVICE = 6,
 141     SET_SPDY_SETTING = 7,
 142     CLEAR_SPDY_SETTINGS = 8,
 143     CLEAR_ALL_SPDY_SETTINGS = 9,
 144     SET_SUPPORTS_QUIC = 10,
 145     SET_SERVER_NETWORK_STATS = 11,
 146     DETECTED_CORRUPTED_PREFS = 12,
 147     NUM_LOCATIONS = 13,
 148   };
 149
 150   // --------------------
 151   // SPDY related methods
 152
 153   // These are used to delay updating of the cached data in
 154   // |http_server_properties_impl_| while the preferences are changing, and
 155   // execute only one update per simultaneous prefs changes.
 156   void ScheduleUpdateCacheOnPrefThread();
 157
 158   // Starts the timers to update the cached prefs. This are overridden in tests
 159   // to prevent the delay.
 160   virtual void StartCacheUpdateTimerOnPrefThread(base::TimeDelta delay);
 161
 162   // Update cached prefs in |http_server_properties_impl_| with data from
 163   // preferences. It gets the data on pref thread and calls
 164   // UpdateSpdyServersFromPrefsOnNetworkThread() to perform the update on
 165   // network thread.
 166   virtual void UpdateCacheFromPrefsOnPrefThread();
 167
 168   // Starts the update of cached prefs in |http_server_properties_impl_| on the
 169   // network thread. Protected for testing.
 170   void UpdateCacheFromPrefsOnNetworkThread(
 171       std::vector<std::string>* spdy_servers,
 172       SpdySettingsMap* spdy_settings_map,
 173       AlternativeServiceMap* alternative_service_map,
 174       IPAddressNumber* last_quic_address,
 175       ServerNetworkStatsMap* server_network_stats_map,
 176       bool detected_corrupted_prefs);
 177
 178   // These are used to delay updating the preferences when cached data in
 179   // |http_server_properties_impl_| is changing, and execute only one update per
 180   // simultaneous spdy_servers or spdy_settings or alternative_service changes.
 181   // |location| specifies where this method is called from. Virtual for testing.
 182   virtual void ScheduleUpdatePrefsOnNetworkThread(Location location);
 183
 184   // Starts the timers to update the prefs from cache. This are overridden in
 185   // tests to prevent the delay.
 186   virtual void StartPrefsUpdateTimerOnNetworkThread(base::TimeDelta delay);
 187
 188   // Update prefs::kHttpServerProperties in preferences with the cached data
 189   // from |http_server_properties_impl_|. This gets the data on network thread
 190   // and posts a task (UpdatePrefsOnPrefThread) to update preferences on pref
 191   // thread.
 192   void UpdatePrefsFromCacheOnNetworkThread();
 193
 194   // Same as above, but fires an optional |completion| callback on pref thread
 195   // when finished. Virtual for testing.
 196   virtual void UpdatePrefsFromCacheOnNetworkThread(
 197       const base::Closure& completion);
 198
 199   // Update prefs::kHttpServerProperties preferences on pref thread. Executes an
 200   // optional |completion| callback when finished. Protected for testing.
 201   void UpdatePrefsOnPrefThread(base::ListValue* spdy_server_list,
 202                                SpdySettingsMap* spdy_settings_map,
 203                                AlternativeServiceMap* alternative_service_map,
 204                                IPAddressNumber* last_quic_address,
 205                                ServerNetworkStatsMap* server_network_stats_map,
 206                                const base::Closure& completion);
 207
 208  private:
 209   void OnHttpServerPropertiesChanged();
 210
 211   bool ReadSupportsQuic(const base::DictionaryValue& server_dict,
 212                         IPAddressNumber* last_quic_address);
 213   void AddToSpdySettingsMap(const HostPortPair& server,
 214                             const base::DictionaryValue& server_dict,
 215                             SpdySettingsMap* spdy_settings_map);
 216   bool ParseAlternativeServiceDict(
 217       const base::DictionaryValue& alternative_service_dict,
 218       const std::string& server_str,
 219       AlternativeServiceInfo* alternative_service_info);
 220   bool AddToAlternativeServiceMap(
 221       const HostPortPair& server,
 222       const base::DictionaryValue& server_dict,
 223       AlternativeServiceMap* alternative_service_map);
 224   bool AddToNetworkStatsMap(const HostPortPair& server,
 225                             const base::DictionaryValue& server_dict,
 226                             ServerNetworkStatsMap* network_stats_map);
 227
 228   void SaveSpdySettingsToServerPrefs(const SettingsMap* spdy_settings_map,
 229                                      base::DictionaryValue* server_pref_dict);
 230   void SaveAlternativeServiceToServerPrefs(
 231       const AlternativeServiceInfoVector* alternative_service_info_vector,
 232       base::DictionaryValue* server_pref_dict);
 233   void SaveNetworkStatsToServerPrefs(
 234       const ServerNetworkStats* server_network_stats,
 235       base::DictionaryValue* server_pref_dict);
 236
 237   void SaveSupportsQuicToPrefs(
 238       const IPAddressNumber* last_quic_address,
 239       base::DictionaryValue* http_server_properties_dict);
 240
 241   // -----------
 242   // Pref thread
 243   // -----------
 244
 245   const scoped_refptr<base::SequencedTaskRunner> pref_task_runner_;
 246
 247   base::WeakPtr<HttpServerPropertiesManager> pref_weak_ptr_;
 248
 249   // Used to post cache update tasks.
 250   scoped_ptr<base::OneShotTimer<HttpServerPropertiesManager> >
 251       pref_cache_update_timer_;
 252
 253   // Used to track the spdy servers changes.
 254   PrefChangeRegistrar pref_change_registrar_;
 255   PrefService* pref_service_;  // Weak.
 256   bool setting_prefs_;
 257   const char* path_;
 258
 259   // --------------
 260   // Network thread
 261   // --------------
 262
 263   const scoped_refptr<base::SequencedTaskRunner> network_task_runner_;
 264
 265   // Used to post |prefs::kHttpServerProperties| pref update tasks.
 266   scoped_ptr<base::OneShotTimer<HttpServerPropertiesManager> >
 267       network_prefs_update_timer_;
 268
 269   scoped_ptr<HttpServerPropertiesImpl> http_server_properties_impl_;
 270
 271   // Used to get |weak_ptr_| to self on the pref thread.
 272   scoped_ptr<base::WeakPtrFactory<HttpServerPropertiesManager> >
 273       pref_weak_ptr_factory_;
 274
 275   // Used to get |weak_ptr_| to self on the network thread.
 276   scoped_ptr<base::WeakPtrFactory<HttpServerPropertiesManager> >
 277       network_weak_ptr_factory_;
 278
 279   DISALLOW_COPY_AND_ASSIGN(HttpServerPropertiesManager);
 280 };
 281
 282 }  // namespace net
 283
 284 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_MANAGER_H_