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 "base/strings/string_util.h"
  11 #include "net/base/host_mapping_rules.h"
  12 #include "net/base/host_port_pair.h"
  13 #include "net/http/http_network_session.h"
  14 #include "url/gurl.h"
  15
  16 namespace net {
  17
  18 // WARNING: If you modify or add any static flags, you must keep them in sync
  19 // with |ResetStaticSettingsToInit|. This is critical for unit test isolation.
  20
  21 // static
  22 bool HttpStreamFactory::spdy_enabled_ = true;
  23
  24 HttpStreamFactory::~HttpStreamFactory() {}
  25
  26 // static
  27 void HttpStreamFactory::ResetStaticSettingsToInit() {
  28   spdy_enabled_ = true;
  29 }
  30
  31 void HttpStreamFactory::ProcessAlternateProtocol(
  32     const base::WeakPtr<HttpServerProperties>& http_server_properties,
  33     const std::vector<std::string>& alternate_protocol_values,
  34     const HostPortPair& http_host_port_pair,
  35     const HttpNetworkSession& session) {
  36   AlternateProtocol protocol = UNINITIALIZED_ALTERNATE_PROTOCOL;
  37   int port = 0;
  38   double probability = 1;
  39   for (size_t i = 0; i < alternate_protocol_values.size(); ++i) {
  40     const std::string& alternate_protocol_str = alternate_protocol_values[i];
  41     if (StartsWithASCII(alternate_protocol_str, "p=", true)) {
  42       if (!base::StringToDouble(alternate_protocol_str.substr(2),
  43                                 &probability) ||
  44           probability < 0 || probability > 1) {
  45         DVLOG(1) << kAlternateProtocolHeader
  46                  << " header has unrecognizable probability: "
  47                  << alternate_protocol_values[i];
  48         return;
  49       }
  50       continue;
  51     }
  52
  53     std::vector<std::string> port_protocol_vector;
  54     base::SplitString(alternate_protocol_str, ':', &port_protocol_vector);
  55     if (port_protocol_vector.size() != 2) {
  56       DVLOG(1) << kAlternateProtocolHeader
  57                << " header has too many tokens: "
  58                << alternate_protocol_str;
  59       return;
  60     }
  61
  62     if (!base::StringToInt(port_protocol_vector[0], &port) ||
  63         port <= 0 || port >= 1 << 16) {
  64       DVLOG(1) << kAlternateProtocolHeader
  65                << " header has unrecognizable port: "
  66                << port_protocol_vector[0];
  67       return;
  68     }
  69
  70     protocol =
  71         AlternateProtocolFromString(port_protocol_vector[1]);
  72     if (IsAlternateProtocolValid(protocol) &&
  73         !session.IsProtocolEnabled(protocol)) {
  74       protocol = ALTERNATE_PROTOCOL_BROKEN;
  75     }
  76
  77     if (protocol == ALTERNATE_PROTOCOL_BROKEN) {
  78       DVLOG(1) << kAlternateProtocolHeader
  79                << " header has unrecognized protocol: "
  80                << port_protocol_vector[1];
  81       return;
  82     }
  83   }
  84
  85   if (protocol == UNINITIALIZED_ALTERNATE_PROTOCOL)
  86     return;
  87
  88   HostPortPair host_port(http_host_port_pair);
  89   const HostMappingRules* mapping_rules = GetHostMappingRules();
  90   if (mapping_rules)
  91     mapping_rules->RewriteHost(&host_port);
  92
  93   if (http_server_properties->HasAlternateProtocol(host_port)) {
  94     const AlternateProtocolInfo existing_alternate =
  95         http_server_properties->GetAlternateProtocol(host_port);
  96     // If we think the alternate protocol is broken, don't change it.
  97     if (existing_alternate.protocol == ALTERNATE_PROTOCOL_BROKEN)
  98       return;
  99   }
 100
 101   http_server_properties->SetAlternateProtocol(host_port, port, protocol,
 102                                                probability);
 103 }
 104
 105 GURL HttpStreamFactory::ApplyHostMappingRules(const GURL& url,
 106                                               HostPortPair* endpoint) {
 107   const HostMappingRules* mapping_rules = GetHostMappingRules();
 108   if (mapping_rules && mapping_rules->RewriteHost(endpoint)) {
 109     url::Replacements<char> replacements;
 110     const std::string port_str = base::IntToString(endpoint->port());
 111     replacements.SetPort(port_str.c_str(), url::Component(0, port_str.size()));
 112     replacements.SetHost(endpoint->host().c_str(),
 113                          url::Component(0, endpoint->host().size()));
 114     return url.ReplaceComponents(replacements);
 115   }
 116   return url;
 117 }
 118
 119 HttpStreamFactory::HttpStreamFactory() {}
 120
 121 }  // namespace net