src/net/http/http_stream_factory.cc

   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 #include "net/http/http_stream_factory.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/string_split.h"
  10 #include "net/base/host_mapping_rules.h"
  11 #include "net/base/host_port_pair.h"
  12 #include "url/gurl.h"
  13
  14 namespace net {
  15
  16 // WARNING: If you modify or add any static flags, you must keep them in sync
  17 // with |ResetStaticSettingsToInit|. This is critical for unit test isolation.
  18
  19 // static
  20 std::vector<std::string>* HttpStreamFactory::next_protos_ = NULL;
  21 // static
  22 bool HttpStreamFactory::enabled_protocols_[NUM_VALID_ALTERNATE_PROTOCOLS];
  23 // static
  24 bool HttpStreamFactory::spdy_enabled_ = true;
  25 // static
  26 bool HttpStreamFactory::use_alternate_protocols_ = false;
  27 // static
  28 bool HttpStreamFactory::force_spdy_over_ssl_ = true;
  29 // static
  30 bool HttpStreamFactory::force_spdy_always_ = false;
  31 // static
  32 std::list<HostPortPair>* HttpStreamFactory::forced_spdy_exclusions_ = NULL;
  33
  34 HttpStreamFactory::~HttpStreamFactory() {}
  35
  36 // static
  37 bool HttpStreamFactory::IsProtocolEnabled(AlternateProtocol protocol) {
  38   DCHECK(IsAlternateProtocolValid(protocol));
  39   return enabled_protocols_[
  40       protocol - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION];
  41 }
  42
  43 // static
  44 void HttpStreamFactory::SetProtocolEnabled(AlternateProtocol protocol) {
  45   DCHECK(IsAlternateProtocolValid(protocol));
  46   enabled_protocols_[
  47       protocol - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION] = true;
  48 }
  49
  50 // static
  51 void HttpStreamFactory::ResetEnabledProtocols() {
  52   for (int i = ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION;
  53        i <= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION; ++i) {
  54     enabled_protocols_[i - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION] = false;
  55   }
  56 }
  57
  58 // static
  59 void HttpStreamFactory::ResetStaticSettingsToInit() {
  60   // WARNING: These must match the initializers above.
  61   delete next_protos_;
  62   delete forced_spdy_exclusions_;
  63   next_protos_ = NULL;
  64   spdy_enabled_ = true;
  65   use_alternate_protocols_ = false;
  66   force_spdy_over_ssl_ = true;
  67   force_spdy_always_ = false;
  68   forced_spdy_exclusions_ = NULL;
  69   ResetEnabledProtocols();
  70 }
  71
  72 void HttpStreamFactory::ProcessAlternateProtocol(
  73     const base::WeakPtr<HttpServerProperties>& http_server_properties,
  74     const std::string& alternate_protocol_str,
  75     const HostPortPair& http_host_port_pair) {
  76   std::vector<std::string> port_protocol_vector;
  77   base::SplitString(alternate_protocol_str, ':', &port_protocol_vector);
  78   if (port_protocol_vector.size() != 2) {
  79     DLOG(WARNING) << kAlternateProtocolHeader
  80                   << " header has too many tokens: "
  81                   << alternate_protocol_str;
  82     return;
  83   }
  84
  85   int port;
  86   if (!base::StringToInt(port_protocol_vector[0], &port) ||
  87       port <= 0 || port >= 1 << 16) {
  88     DLOG(WARNING) << kAlternateProtocolHeader
  89                   << " header has unrecognizable port: "
  90                   << port_protocol_vector[0];
  91     return;
  92   }
  93
  94   AlternateProtocol protocol =
  95       AlternateProtocolFromString(port_protocol_vector[1]);
  96   if (IsAlternateProtocolValid(protocol) && !IsProtocolEnabled(protocol)) {
  97     protocol = ALTERNATE_PROTOCOL_BROKEN;
  98   }
  99
 100   if (protocol == ALTERNATE_PROTOCOL_BROKEN) {
 101     DLOG(WARNING) << kAlternateProtocolHeader
 102                   << " header has unrecognized protocol: "
 103                   << port_protocol_vector[1];
 104     return;
 105   }
 106
 107   HostPortPair host_port(http_host_port_pair);
 108   const HostMappingRules* mapping_rules = GetHostMappingRules();
 109   if (mapping_rules)
 110     mapping_rules->RewriteHost(&host_port);
 111
 112   if (http_server_properties->HasAlternateProtocol(host_port)) {
 113     const PortAlternateProtocolPair existing_alternate =
 114         http_server_properties->GetAlternateProtocol(host_port);
 115     // If we think the alternate protocol is broken, don't change it.
 116     if (existing_alternate.protocol == ALTERNATE_PROTOCOL_BROKEN)
 117       return;
 118   }
 119
 120   http_server_properties->SetAlternateProtocol(host_port, port, protocol);
 121 }
 122
 123 GURL HttpStreamFactory::ApplyHostMappingRules(const GURL& url,
 124                                               HostPortPair* endpoint) {
 125   const HostMappingRules* mapping_rules = GetHostMappingRules();
 126   if (mapping_rules && mapping_rules->RewriteHost(endpoint)) {
 127     url_canon::Replacements<char> replacements;
 128     const std::string port_str = base::IntToString(endpoint->port());
 129     replacements.SetPort(port_str.c_str(),
 130                          url_parse::Component(0, port_str.size()));
 131     replacements.SetHost(endpoint->host().c_str(),
 132                          url_parse::Component(0, endpoint->host().size()));
 133     return url.ReplaceComponents(replacements);
 134   }
 135   return url;
 136 }
 137
 138 // static
 139 void HttpStreamFactory::add_forced_spdy_exclusion(const std::string& value) {
 140   HostPortPair pair = HostPortPair::FromURL(GURL(value));
 141   if (!forced_spdy_exclusions_)
 142     forced_spdy_exclusions_ = new std::list<HostPortPair>();
 143   forced_spdy_exclusions_->push_back(pair);
 144 }
 145
 146 // static
 147 bool HttpStreamFactory::HasSpdyExclusion(const HostPortPair& endpoint) {
 148   std::list<HostPortPair>* exclusions = forced_spdy_exclusions_;
 149   if (!exclusions)
 150     return false;
 151
 152   std::list<HostPortPair>::const_iterator it;
 153   for (it = exclusions->begin(); it != exclusions->end(); ++it)
 154     if (it->Equals(endpoint))
 155       return true;
 156   return false;
 157 }
 158
 159 // static
 160 void HttpStreamFactory::EnableNpnHttpOnly() {
 161   // Avoid alternate protocol in this case. Otherwise, browser will try SSL
 162   // and then fallback to http. This introduces extra load.
 163   set_use_alternate_protocols(false);
 164   std::vector<NextProto> next_protos;
 165   next_protos.push_back(kProtoHTTP11);
 166   SetNextProtos(next_protos);
 167 }
 168
 169 // static
 170 void HttpStreamFactory::EnableNpnSpdy3() {
 171   set_use_alternate_protocols(true);
 172   std::vector<NextProto> next_protos;
 173   next_protos.push_back(kProtoHTTP11);
 174   next_protos.push_back(kProtoQUIC1SPDY3);
 175   next_protos.push_back(kProtoSPDY3);
 176   SetNextProtos(next_protos);
 177 }
 178
 179 // static
 180 void HttpStreamFactory::EnableNpnSpdy31() {
 181   set_use_alternate_protocols(true);
 182   std::vector<NextProto> next_protos;
 183   next_protos.push_back(kProtoHTTP11);
 184   next_protos.push_back(kProtoQUIC1SPDY3);
 185   next_protos.push_back(kProtoSPDY3);
 186   next_protos.push_back(kProtoSPDY31);
 187   SetNextProtos(next_protos);
 188 }
 189
 190 // static
 191 void HttpStreamFactory::EnableNpnSpdy31WithSpdy2() {
 192   set_use_alternate_protocols(true);
 193   std::vector<NextProto> next_protos;
 194   next_protos.push_back(kProtoHTTP11);
 195   next_protos.push_back(kProtoQUIC1SPDY3);
 196   next_protos.push_back(kProtoDeprecatedSPDY2);
 197   next_protos.push_back(kProtoSPDY3);
 198   next_protos.push_back(kProtoSPDY31);
 199   SetNextProtos(next_protos);
 200 }
 201
 202 // static
 203 void HttpStreamFactory::EnableNpnSpdy4a2() {
 204   set_use_alternate_protocols(true);
 205   std::vector<NextProto> next_protos;
 206   next_protos.push_back(kProtoHTTP11);
 207   next_protos.push_back(kProtoQUIC1SPDY3);
 208   next_protos.push_back(kProtoSPDY3);
 209   next_protos.push_back(kProtoSPDY31);
 210   next_protos.push_back(kProtoSPDY4a2);
 211   SetNextProtos(next_protos);
 212 }
 213
 214 // static
 215 void HttpStreamFactory::EnableNpnHttp2Draft04() {
 216   set_use_alternate_protocols(true);
 217   std::vector<NextProto> next_protos;
 218   next_protos.push_back(kProtoHTTP11);
 219   next_protos.push_back(kProtoQUIC1SPDY3);
 220   next_protos.push_back(kProtoSPDY3);
 221   next_protos.push_back(kProtoSPDY31);
 222   next_protos.push_back(kProtoSPDY4a2);
 223   next_protos.push_back(kProtoHTTP2Draft04);
 224   SetNextProtos(next_protos);
 225 }
 226
 227 // static
 228 void HttpStreamFactory::SetNextProtos(const std::vector<NextProto>& value) {
 229   if (!next_protos_)
 230     next_protos_ = new std::vector<std::string>;
 231
 232   next_protos_->clear();
 233
 234   ResetEnabledProtocols();
 235
 236   // TODO(rtenneti): bug 116575 - consider combining the NextProto and
 237   // AlternateProtocol.
 238   for (uint32 i = 0; i < value.size(); ++i) {
 239     NextProto proto = value[i];
 240     // Add the protocol to the TLS next protocol list, except for QUIC
 241     // since it uses UDP.
 242     if (proto != kProtoQUIC1SPDY3) {
 243       next_protos_->push_back(SSLClientSocket::NextProtoToString(proto));
 244     }
 245
 246     // Enable the corresponding alternate protocol, except for HTTP
 247     // which has not corresponding alternative.
 248     if (proto != kProtoHTTP11) {
 249       AlternateProtocol alternate = AlternateProtocolFromNextProto(proto);
 250       if (!IsAlternateProtocolValid(alternate)) {
 251         NOTREACHED() << "Invalid next proto: " << proto;
 252         continue;
 253       }
 254       SetProtocolEnabled(alternate);
 255     }
 256   }
 257 }
 258
 259 HttpStreamFactory::HttpStreamFactory() {}
 260
 261 }  // namespace net