net/http/http_server_properties.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_H_
   6 #define NET_HTTP_HTTP_SERVER_PROPERTIES_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include "base/basictypes.h"
  11 #include "base/containers/mru_cache.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/time/time.h"
  14 #include "net/base/host_port_pair.h"
  15 #include "net/base/net_export.h"
  16 #include "net/base/net_util.h"
  17 #include "net/quic/quic_bandwidth.h"
  18 #include "net/socket/next_proto.h"
  19 #include "net/spdy/spdy_framer.h"  // TODO(willchan): Reconsider this.
  20 #include "net/spdy/spdy_protocol.h"
  21
  22 namespace base {
  23 class Value;
  24 }
  25
  26 namespace net {
  27
  28 struct SSLConfig;
  29
  30 enum AlternateProtocolUsage {
  31   // Alternate Protocol was used without racing a normal connection.
  32   ALTERNATE_PROTOCOL_USAGE_NO_RACE = 0,
  33   // Alternate Protocol was used by winning a race with a normal connection.
  34   ALTERNATE_PROTOCOL_USAGE_WON_RACE = 1,
  35   // Alternate Protocol was not used by losing a race with a normal connection.
  36   ALTERNATE_PROTOCOL_USAGE_LOST_RACE = 2,
  37   // Alternate Protocol was not used because no Alternate-Protocol information
  38   // was available when the request was issued, but an Alternate-Protocol header
  39   // was present in the response.
  40   ALTERNATE_PROTOCOL_USAGE_MAPPING_MISSING = 3,
  41   // Alternate Protocol was not used because it was marked broken.
  42   ALTERNATE_PROTOCOL_USAGE_BROKEN = 4,
  43   // Maximum value for the enum.
  44   ALTERNATE_PROTOCOL_USAGE_MAX,
  45 };
  46
  47 // Log a histogram to reflect |usage|.
  48 NET_EXPORT void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage);
  49
  50 enum BrokenAlternateProtocolLocation {
  51   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB = 0,
  52   BROKEN_ALTERNATE_PROTOCOL_LOCATION_QUIC_STREAM_FACTORY = 1,
  53   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT = 2,
  54   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN = 3,
  55   BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX,
  56 };
  57
  58 // Log a histogram to reflect |location|.
  59 NET_EXPORT void HistogramBrokenAlternateProtocolLocation(
  60     BrokenAlternateProtocolLocation location);
  61
  62 enum AlternateProtocol {
  63   DEPRECATED_NPN_SPDY_2 = 0,
  64   ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION = DEPRECATED_NPN_SPDY_2,
  65   NPN_SPDY_MINIMUM_VERSION = DEPRECATED_NPN_SPDY_2,
  66   NPN_SPDY_3,
  67   NPN_SPDY_3_1,
  68   NPN_SPDY_4_14,  // HTTP/2 draft-14
  69   NPN_SPDY_4,     // HTTP/2
  70   NPN_SPDY_MAXIMUM_VERSION = NPN_SPDY_4,
  71   QUIC,
  72   ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION = QUIC,
  73   UNINITIALIZED_ALTERNATE_PROTOCOL,
  74 };
  75
  76 // Simply returns whether |protocol| is between
  77 // ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION and
  78 // ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION (inclusive).
  79 NET_EXPORT bool IsAlternateProtocolValid(AlternateProtocol protocol);
  80
  81 enum AlternateProtocolSize {
  82   NUM_VALID_ALTERNATE_PROTOCOLS =
  83     ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION -
  84     ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION + 1,
  85 };
  86
  87 NET_EXPORT const char* AlternateProtocolToString(AlternateProtocol protocol);
  88 NET_EXPORT AlternateProtocol AlternateProtocolFromString(
  89     const std::string& str);
  90 NET_EXPORT_PRIVATE AlternateProtocol AlternateProtocolFromNextProto(
  91     NextProto next_proto);
  92
  93 // (protocol, host, port) triple as defined in
  94 // https://tools.ietf.org/id/draft-ietf-httpbis-alt-svc-06.html
  95 struct NET_EXPORT AlternativeService {
  96   AlternativeService()
  97       : protocol(UNINITIALIZED_ALTERNATE_PROTOCOL), host(), port(0) {}
  98
  99   AlternativeService(AlternateProtocol protocol,
 100                      const std::string& host,
 101                      uint16 port)
 102       : protocol(protocol), host(host), port(port) {}
 103
 104   AlternativeService(AlternateProtocol protocol,
 105                      const HostPortPair& host_port_pair)
 106       : protocol(protocol),
 107         host(host_port_pair.host()),
 108         port(host_port_pair.port()) {}
 109
 110   AlternativeService(const AlternativeService& alternative_service) = default;
 111   AlternativeService& operator=(const AlternativeService& alternative_service) =
 112       default;
 113
 114   HostPortPair host_port_pair() { return HostPortPair(host, port); }
 115
 116   bool operator==(const AlternativeService& other) const {
 117     return protocol == other.protocol && host == other.host &&
 118            port == other.port;
 119   }
 120
 121   bool operator<(const AlternativeService& other) const {
 122     if (protocol != other.protocol)
 123       return protocol < other.protocol;
 124     if (host != other.host)
 125       return host < other.host;
 126     return port < other.port;
 127   }
 128
 129   std::string ToString() const;
 130
 131   AlternateProtocol protocol;
 132   std::string host;
 133   uint16 port;
 134 };
 135
 136 struct NET_EXPORT AlternativeServiceInfo {
 137   AlternativeServiceInfo() : alternative_service(), probability(0.0) {}
 138
 139   AlternativeServiceInfo(const AlternativeService& alternative_service,
 140                          double probability)
 141       : alternative_service(alternative_service), probability(probability) {}
 142
 143   AlternativeServiceInfo(AlternateProtocol protocol,
 144                          const std::string& host,
 145                          uint16 port,
 146                          double probability)
 147       : alternative_service(protocol, host, port), probability(probability) {}
 148
 149   AlternativeServiceInfo(
 150       const AlternativeServiceInfo& alternative_service_info) = default;
 151   AlternativeServiceInfo& operator=(
 152       const AlternativeServiceInfo& alternative_service_info) = default;
 153
 154   bool operator==(const AlternativeServiceInfo& other) const {
 155     return alternative_service == other.alternative_service &&
 156            probability == other.probability;
 157   }
 158
 159   bool operator!=(const AlternativeServiceInfo& other) const {
 160     return !this->operator==(other);
 161   }
 162
 163   std::string ToString() const;
 164
 165   AlternativeService alternative_service;
 166   double probability;
 167 };
 168
 169 struct NET_EXPORT SupportsQuic {
 170   SupportsQuic() : used_quic(false) {}
 171   SupportsQuic(bool used_quic, const std::string& address)
 172       : used_quic(used_quic),
 173         address(address) {}
 174
 175   bool Equals(const SupportsQuic& other) const {
 176     return used_quic == other.used_quic && address == other.address;
 177   }
 178
 179   bool used_quic;
 180   std::string address;
 181 };
 182
 183 struct NET_EXPORT ServerNetworkStats {
 184   ServerNetworkStats() : bandwidth_estimate(QuicBandwidth::Zero()) {}
 185
 186   base::TimeDelta srtt;
 187   QuicBandwidth bandwidth_estimate;
 188 };
 189
 190 typedef base::MRUCache<HostPortPair, AlternativeServiceInfo>
 191     AlternativeServiceMap;
 192 typedef base::MRUCache<HostPortPair, SettingsMap> SpdySettingsMap;
 193 typedef base::MRUCache<HostPortPair, ServerNetworkStats> ServerNetworkStatsMap;
 194
 195 extern const char kAlternateProtocolHeader[];
 196
 197 // The interface for setting/retrieving the HTTP server properties.
 198 // Currently, this class manages servers':
 199 // * SPDY support (based on NPN results)
 200 // * alternative service support
 201 // * Spdy Settings (like CWND ID field)
 202 class NET_EXPORT HttpServerProperties {
 203  public:
 204   HttpServerProperties() {}
 205   virtual ~HttpServerProperties() {}
 206
 207   // Gets a weak pointer for this object.
 208   virtual base::WeakPtr<HttpServerProperties> GetWeakPtr() = 0;
 209
 210   // Deletes all data.
 211   virtual void Clear() = 0;
 212
 213   // Returns true if |server| supports a network protocol which honors
 214   // request prioritization.
 215   virtual bool SupportsRequestPriority(const HostPortPair& server) = 0;
 216
 217   // Add |server| into the persistent store. Should only be called from IO
 218   // thread.
 219   virtual void SetSupportsSpdy(const HostPortPair& server,
 220                                bool support_spdy) = 0;
 221
 222   // Returns true if |server| has required HTTP/1.1 via HTTP/2 error code.
 223   virtual bool RequiresHTTP11(const HostPortPair& server) = 0;
 224
 225   // Require HTTP/1.1 on subsequent connections.  Not persisted.
 226   virtual void SetHTTP11Required(const HostPortPair& server) = 0;
 227
 228   // Modify SSLConfig to force HTTP/1.1.
 229   static void ForceHTTP11(SSLConfig* ssl_config);
 230
 231   // Modify SSLConfig to force HTTP/1.1 if necessary.
 232   virtual void MaybeForceHTTP11(const HostPortPair& server,
 233                                 SSLConfig* ssl_config) = 0;
 234
 235   // Returns the alternative service for |origin| if it has probability equal to
 236   // or exceeding threshold, or else the forced AlternateProtocol if there is
 237   // one, or else one with UNINITIALIZED_ALTERNATE_PROTOCOL.
 238   virtual AlternativeService GetAlternativeService(
 239       const HostPortPair& origin) = 0;
 240
 241   // Sets the alternative service for |origin|.
 242   // TODO(bnc): alternative_service.host is currently ignored, fix it.
 243   virtual void SetAlternativeService(
 244       const HostPortPair& origin,
 245       const AlternativeService& alternative_service,
 246       double alternative_probability) = 0;
 247
 248   // Marks |alternative_service| as broken.
 249   virtual void MarkAlternativeServiceBroken(
 250       const AlternativeService& alternative_service) = 0;
 251
 252   // Marks |alternative_service| as recently broken.
 253   virtual void MarkAlternativeServiceRecentlyBroken(
 254       const AlternativeService& alternative_service) = 0;
 255
 256   // Returns true iff |alternative_service| is currently broken.
 257   virtual bool IsAlternativeServiceBroken(
 258       const AlternativeService& alternative_service) const = 0;
 259
 260   // Returns true iff |alternative_service| was recently broken.
 261   virtual bool WasAlternativeServiceRecentlyBroken(
 262       const AlternativeService& alternative_service) = 0;
 263
 264   // Confirms that |alternative_service| is working.
 265   virtual void ConfirmAlternativeService(
 266       const AlternativeService& alternative_service) = 0;
 267
 268   // Clears the alternative service for |origin|.
 269   virtual void ClearAlternativeService(const HostPortPair& origin) = 0;
 270
 271   // Returns all alternative service mappings.
 272   virtual const AlternativeServiceMap& alternative_service_map() const = 0;
 273
 274   // Returns all alternative service mappings as human readable strings.
 275   virtual base::Value* GetAlternativeServiceInfoAsValue() const = 0;
 276
 277   // Sets the threshold to be used when evaluating alternative service
 278   // advertisments. Only advertisements with a probability greater than or equal
 279   // to |threshold| will be honored. |threshold| must be between 0.0 and 1.0
 280   // inclusive. Hence, a threshold of 0.0 implies that all advertisements will
 281   // be honored.
 282   virtual void SetAlternateProtocolProbabilityThreshold(
 283       double threshold) = 0;
 284
 285   // Gets a reference to the SettingsMap stored for a host.
 286   // If no settings are stored, returns an empty SettingsMap.
 287   virtual const SettingsMap& GetSpdySettings(
 288       const HostPortPair& host_port_pair) = 0;
 289
 290   // Saves an individual SPDY setting for a host. Returns true if SPDY setting
 291   // is to be persisted.
 292   virtual bool SetSpdySetting(const HostPortPair& host_port_pair,
 293                               SpdySettingsIds id,
 294                               SpdySettingsFlags flags,
 295                               uint32 value) = 0;
 296
 297   // Clears all SPDY settings for a host.
 298   virtual void ClearSpdySettings(const HostPortPair& host_port_pair) = 0;
 299
 300   // Clears all SPDY settings for all hosts.
 301   virtual void ClearAllSpdySettings() = 0;
 302
 303   // Returns all persistent SPDY settings.
 304   virtual const SpdySettingsMap& spdy_settings_map() const = 0;
 305
 306   virtual bool GetSupportsQuic(IPAddressNumber* last_address) const = 0;
 307
 308   virtual void SetSupportsQuic(bool used_quic,
 309                                const IPAddressNumber& last_address) = 0;
 310
 311   virtual void SetServerNetworkStats(const HostPortPair& host_port_pair,
 312                                      ServerNetworkStats stats) = 0;
 313
 314   virtual const ServerNetworkStats* GetServerNetworkStats(
 315       const HostPortPair& host_port_pair) = 0;
 316
 317   virtual const ServerNetworkStatsMap& server_network_stats_map() const = 0;
 318
 319  private:
 320   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 321 };
 322
 323 }  // namespace net
 324
 325 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_H_