net/http/http_server_properties_impl.h

   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 #ifndef NET_HTTP_HTTP_SERVER_PROPERTIES_IMPL_H_
   6 #define NET_HTTP_HTTP_SERVER_PROPERTIES_IMPL_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/containers/hash_tables.h"
  14 #include "base/containers/mru_cache.h"
  15 #include "base/gtest_prod_util.h"
  16 #include "base/threading/non_thread_safe.h"
  17 #include "base/values.h"
  18 #include "net/base/host_port_pair.h"
  19 #include "net/base/net_export.h"
  20 #include "net/http/http_pipelined_host_capability.h"
  21 #include "net/http/http_server_properties.h"
  22
  23 namespace base {
  24 class ListValue;
  25 }
  26
  27 namespace net {
  28
  29 // The implementation for setting/retrieving the HTTP server properties.
  30 class NET_EXPORT HttpServerPropertiesImpl
  31     : public HttpServerProperties,
  32       NON_EXPORTED_BASE(public base::NonThreadSafe) {
  33  public:
  34   HttpServerPropertiesImpl();
  35   virtual ~HttpServerPropertiesImpl();
  36
  37   // Initializes |spdy_servers_map_| with the servers (host/port) from
  38   // |spdy_servers| that either support SPDY or not.
  39   void InitializeSpdyServers(std::vector<std::string>* spdy_servers,
  40                              bool support_spdy);
  41
  42   void InitializeAlternateProtocolServers(
  43       AlternateProtocolMap* alternate_protocol_servers);
  44
  45   void InitializeSpdySettingsServers(SpdySettingsMap* spdy_settings_map);
  46
  47   // Initializes |pipeline_capability_map_| with the servers (host/port) from
  48   // |pipeline_capability_map| that either support HTTP pipelining or not.
  49   void InitializePipelineCapabilities(
  50       const PipelineCapabilityMap* pipeline_capability_map);
  51
  52   // Get the list of servers (host/port) that support SPDY. The max_size is the
  53   // number of MRU servers that support SPDY that are to be returned.
  54   void GetSpdyServerList(base::ListValue* spdy_server_list,
  55                          size_t max_size) const;
  56
  57   // Returns flattened string representation of the |host_port_pair|. Used by
  58   // unittests.
  59   static std::string GetFlattenedSpdyServer(
  60       const net::HostPortPair& host_port_pair);
  61
  62   // Debugging to simulate presence of an AlternateProtocol.
  63   // If we don't have an alternate protocol in the map for any given host/port
  64   // pair, force this ProtocolPortPair.
  65   static void ForceAlternateProtocol(const PortAlternateProtocolPair& pair);
  66   static void DisableForcedAlternateProtocol();
  67
  68   // Changes the number of host/port pairs we remember pipelining capability
  69   // for. A larger number means we're more likely to be able to pipeline
  70   // immediately if a host is known good, but uses more memory. This function
  71   // can only be called if |pipeline_capability_map_| is empty.
  72   void SetNumPipelinedHostsToRemember(int max_size);
  73
  74   // -----------------------------
  75   // HttpServerProperties methods:
  76   // -----------------------------
  77
  78   // Gets a weak pointer for this object.
  79   virtual base::WeakPtr<HttpServerProperties> GetWeakPtr() OVERRIDE;
  80
  81   // Deletes all data.
  82   virtual void Clear() OVERRIDE;
  83
  84   // Returns true if |server| supports SPDY.
  85   virtual bool SupportsSpdy(const HostPortPair& server) OVERRIDE;
  86
  87   // Add |server| into the persistent store.
  88   virtual void SetSupportsSpdy(const HostPortPair& server,
  89                                bool support_spdy) OVERRIDE;
  90
  91   // Returns true if |server| has an Alternate-Protocol header.
  92   virtual bool HasAlternateProtocol(const HostPortPair& server) OVERRIDE;
  93
  94   // Returns the Alternate-Protocol and port for |server|.
  95   // HasAlternateProtocol(server) must be true.
  96   virtual PortAlternateProtocolPair GetAlternateProtocol(
  97       const HostPortPair& server) OVERRIDE;
  98
  99   // Sets the Alternate-Protocol for |server|.
 100   virtual void SetAlternateProtocol(
 101       const HostPortPair& server,
 102       uint16 alternate_port,
 103       AlternateProtocol alternate_protocol) OVERRIDE;
 104
 105   // Sets the Alternate-Protocol for |server| to be BROKEN.
 106   virtual void SetBrokenAlternateProtocol(const HostPortPair& server) OVERRIDE;
 107
 108   // Returns true if Alternate-Protocol for |server| was recently BROKEN.
 109   virtual bool WasAlternateProtocolRecentlyBroken(
 110       const HostPortPair& server) OVERRIDE;
 111
 112   // Confirms that Alternate-Protocol for |server| is working.
 113   virtual void ConfirmAlternateProtocol(const HostPortPair& server) OVERRIDE;
 114
 115   // Clears the Alternate-Protocol for |server|.
 116   virtual void ClearAlternateProtocol(const HostPortPair& server) OVERRIDE;
 117
 118   // Returns all Alternate-Protocol mappings.
 119   virtual const AlternateProtocolMap& alternate_protocol_map() const OVERRIDE;
 120
 121   // Gets a reference to the SettingsMap stored for a host.
 122   // If no settings are stored, returns an empty SettingsMap.
 123   virtual const SettingsMap& GetSpdySettings(
 124       const HostPortPair& host_port_pair) OVERRIDE;
 125
 126   // Saves an individual SPDY setting for a host. Returns true if SPDY setting
 127   // is to be persisted.
 128   virtual bool SetSpdySetting(const HostPortPair& host_port_pair,
 129                               SpdySettingsIds id,
 130                               SpdySettingsFlags flags,
 131                               uint32 value) OVERRIDE;
 132
 133   // Clears all entries in |spdy_settings_map_| for a host.
 134   virtual void ClearSpdySettings(const HostPortPair& host_port_pair) OVERRIDE;
 135
 136   // Clears all entries in |spdy_settings_map_|.
 137   virtual void ClearAllSpdySettings() OVERRIDE;
 138
 139   // Returns all persistent SPDY settings.
 140   virtual const SpdySettingsMap& spdy_settings_map() const OVERRIDE;
 141
 142   virtual void SetServerNetworkStats(const HostPortPair& host_port_pair,
 143                                      NetworkStats stats) OVERRIDE;
 144
 145   virtual const NetworkStats* GetServerNetworkStats(
 146       const HostPortPair& host_port_pair) const OVERRIDE;
 147
 148   virtual HttpPipelinedHostCapability GetPipelineCapability(
 149       const HostPortPair& origin) OVERRIDE;
 150
 151   virtual void SetPipelineCapability(
 152       const HostPortPair& origin,
 153       HttpPipelinedHostCapability capability) OVERRIDE;
 154
 155   virtual void ClearPipelineCapabilities() OVERRIDE;
 156
 157   virtual PipelineCapabilityMap GetPipelineCapabilityMap() const OVERRIDE;
 158
 159  private:
 160   typedef base::MRUCache<
 161       HostPortPair, HttpPipelinedHostCapability> CachedPipelineCapabilityMap;
 162   // |spdy_servers_map_| has flattened representation of servers (host, port)
 163   // that either support or not support SPDY protocol.
 164   typedef base::MRUCache<std::string, bool> SpdyServerHostPortMap;
 165   typedef std::map<HostPortPair, NetworkStats> ServerNetworkStatsMap;
 166   typedef std::map<HostPortPair, HostPortPair> CanonicalHostMap;
 167   typedef std::vector<std::string> CanonicalSufficList;
 168   // List of broken host:ports and the times when they can be expired.
 169   struct BrokenAlternateProtocolEntry {
 170     HostPortPair server;
 171     base::TimeTicks when;
 172   };
 173   typedef std::list<BrokenAlternateProtocolEntry>
 174       BrokenAlternateProtocolList;
 175   // Map from host:port to the number of times alternate protocol has
 176   // been marked broken.
 177   typedef std::map<HostPortPair, int> BrokenAlternateProtocolMap;
 178
 179   // Return the canonical host for |server|, or end if none exists.
 180   CanonicalHostMap::const_iterator GetCanonicalHost(HostPortPair server) const;
 181
 182   void ExpireBrokenAlternateProtocolMappings();
 183   void ScheduleBrokenAlternateProtocolMappingsExpiration();
 184
 185   SpdyServerHostPortMap spdy_servers_map_;
 186
 187   AlternateProtocolMap alternate_protocol_map_;
 188   BrokenAlternateProtocolList broken_alternate_protocol_list_;
 189   BrokenAlternateProtocolMap broken_alternate_protocol_map_;
 190
 191   SpdySettingsMap spdy_settings_map_;
 192   ServerNetworkStatsMap server_network_stats_map_;
 193   scoped_ptr<CachedPipelineCapabilityMap> pipeline_capability_map_;
 194   // Contains a map of servers which could share the same alternate protocol.
 195   // Map from a Canonical host/port (host is some postfix of host names) to an
 196   // actual origin, which has a plausible alternate protocol mapping.
 197   CanonicalHostMap canonical_host_to_origin_map_;
 198   // Contains list of suffixes (for exmaple ".c.youtube.com",
 199   // ".googlevideo.com") of canoncial hostnames.
 200   CanonicalSufficList canoncial_suffixes_;
 201
 202   base::WeakPtrFactory<HttpServerPropertiesImpl> weak_ptr_factory_;
 203
 204   DISALLOW_COPY_AND_ASSIGN(HttpServerPropertiesImpl);
 205 };
 206
 207 }  // namespace net
 208
 209 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_IMPL_H_