1// Copyright (c) 2011 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/string_number_conversions.h"
9#include "base/string_split.h"
10#include "googleurl/src/gurl.h"
11#include "net/base/host_mapping_rules.h"
12#include "net/base/host_port_pair.h"
13#include "net/http/http_alternate_protocols.h"
14
15namespace net {
16
17// static
18const HostMappingRules* HttpStreamFactory::host_mapping_rules_ = NULL;
19// static
20const std::string* HttpStreamFactory::next_protos_ = NULL;
21// static
22bool HttpStreamFactory::spdy_enabled_ = true;
23// static
24bool HttpStreamFactory::use_alternate_protocols_ = false;
25// static
26bool HttpStreamFactory::force_spdy_over_ssl_ = true;
27// static
28bool HttpStreamFactory::force_spdy_always_ = false;
29// static
30std::list<HostPortPair>* HttpStreamFactory::forced_spdy_exclusions_ = NULL;
31// static
32bool HttpStreamFactory::ignore_certificate_errors_ = false;
33
34HttpStreamFactory::~HttpStreamFactory() {}
35
36void HttpStreamFactory::ProcessAlternateProtocol(
37    HttpAlternateProtocols* alternate_protocols,
38    const std::string& alternate_protocol_str,
39    const HostPortPair& http_host_port_pair) {
40  std::vector<std::string> port_protocol_vector;
41  base::SplitString(alternate_protocol_str, ':', &port_protocol_vector);
42  if (port_protocol_vector.size() != 2) {
43    DLOG(WARNING) << HttpAlternateProtocols::kHeader
44                  << " header has too many tokens: "
45                  << alternate_protocol_str;
46    return;
47  }
48
49  int port;
50  if (!base::StringToInt(port_protocol_vector[0], &port) ||
51      port <= 0 || port >= 1 << 16) {
52    DLOG(WARNING) << HttpAlternateProtocols::kHeader
53                  << " header has unrecognizable port: "
54                  << port_protocol_vector[0];
55    return;
56  }
57
58  HttpAlternateProtocols::Protocol protocol = HttpAlternateProtocols::BROKEN;
59  // We skip NPN_SPDY_1 here, because we've rolled the protocol version to 2.
60  for (int i = HttpAlternateProtocols::NPN_SPDY_2;
61       i < HttpAlternateProtocols::NUM_ALTERNATE_PROTOCOLS; ++i) {
62    if (port_protocol_vector[1] == HttpAlternateProtocols::kProtocolStrings[i])
63      protocol = static_cast<HttpAlternateProtocols::Protocol>(i);
64  }
65
66  if (protocol == HttpAlternateProtocols::BROKEN) {
67    // Currently, we only recognize the npn-spdy protocol.
68    DLOG(WARNING) << HttpAlternateProtocols::kHeader
69                  << " header has unrecognized protocol: "
70                  << port_protocol_vector[1];
71    return;
72  }
73
74  HostPortPair host_port(http_host_port_pair);
75  host_mapping_rules().RewriteHost(&host_port);
76
77  if (alternate_protocols->HasAlternateProtocolFor(host_port)) {
78    const HttpAlternateProtocols::PortProtocolPair existing_alternate =
79        alternate_protocols->GetAlternateProtocolFor(host_port);
80    // If we think the alternate protocol is broken, don't change it.
81    if (existing_alternate.protocol == HttpAlternateProtocols::BROKEN)
82      return;
83  }
84
85  alternate_protocols->SetAlternateProtocolFor(host_port, port, protocol);
86}
87
88GURL HttpStreamFactory::ApplyHostMappingRules(const GURL& url,
89                                              HostPortPair* endpoint) {
90  if (host_mapping_rules().RewriteHost(endpoint)) {
91    url_canon::Replacements<char> replacements;
92    const std::string port_str = base::IntToString(endpoint->port());
93    replacements.SetPort(port_str.c_str(),
94                         url_parse::Component(0, port_str.size()));
95    replacements.SetHost(endpoint->host().c_str(),
96                         url_parse::Component(0, endpoint->host().size()));
97    return url.ReplaceComponents(replacements);
98  }
99  return url;
100}
101
102// static
103void HttpStreamFactory::add_forced_spdy_exclusion(const std::string& value) {
104  HostPortPair pair = HostPortPair::FromURL(GURL(value));
105  if (!forced_spdy_exclusions_)
106    forced_spdy_exclusions_ = new std::list<HostPortPair>();
107  forced_spdy_exclusions_->push_back(pair);
108}
109
110// static
111bool HttpStreamFactory::HasSpdyExclusion(const HostPortPair& endpoint) {
112  std::list<HostPortPair>* exclusions = forced_spdy_exclusions_;
113  if (!exclusions)
114    return false;
115
116  std::list<HostPortPair>::const_iterator it;
117  for (it = exclusions->begin(); it != exclusions->end(); ++it)
118    if (it->Equals(endpoint))
119      return true;
120  return false;
121}
122
123// static
124void HttpStreamFactory::SetHostMappingRules(const std::string& rules) {
125  HostMappingRules* host_mapping_rules = new HostMappingRules;
126  host_mapping_rules->SetRulesFromString(rules);
127  delete host_mapping_rules_;
128  host_mapping_rules_ = host_mapping_rules;
129}
130
131HttpStreamFactory::HttpStreamFactory() {}
132
133// static
134const HostMappingRules& HttpStreamFactory::host_mapping_rules() {
135  if (!host_mapping_rules_)
136    host_mapping_rules_ = new HostMappingRules;
137  return *host_mapping_rules_;
138}
139
140}  // namespace net
141