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      1 // Copyright 2014 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 "components/cronet/android/url_request_context_adapter.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/files/file_util.h"
      9 #include "base/single_thread_task_runner.h"
     10 #include "components/cronet/url_request_context_config.h"
     11 #include "net/base/net_errors.h"
     12 #include "net/base/net_log_logger.h"
     13 #include "net/cert/cert_verifier.h"
     14 #include "net/http/http_auth_handler_factory.h"
     15 #include "net/http/http_network_layer.h"
     16 #include "net/http/http_server_properties.h"
     17 #include "net/proxy/proxy_config_service_fixed.h"
     18 #include "net/proxy/proxy_service.h"
     19 #include "net/ssl/ssl_config_service_defaults.h"
     20 #include "net/url_request/static_http_user_agent_settings.h"
     21 #include "net/url_request/url_request_context_builder.h"
     22 #include "net/url_request/url_request_context_storage.h"
     23 #include "net/url_request/url_request_job_factory_impl.h"
     24 
     25 namespace {
     26 
     27 class BasicNetworkDelegate : public net::NetworkDelegate {
     28  public:
     29   BasicNetworkDelegate() {}
     30   virtual ~BasicNetworkDelegate() {}
     31 
     32  private:
     33   // net::NetworkDelegate implementation.
     34   virtual int OnBeforeURLRequest(net::URLRequest* request,
     35                                  const net::CompletionCallback& callback,
     36                                  GURL* new_url) OVERRIDE {
     37     return net::OK;
     38   }
     39 
     40   virtual int OnBeforeSendHeaders(net::URLRequest* request,
     41                                   const net::CompletionCallback& callback,
     42                                   net::HttpRequestHeaders* headers) OVERRIDE {
     43     return net::OK;
     44   }
     45 
     46   virtual void OnSendHeaders(net::URLRequest* request,
     47                              const net::HttpRequestHeaders& headers) OVERRIDE {}
     48 
     49   virtual int OnHeadersReceived(
     50       net::URLRequest* request,
     51       const net::CompletionCallback& callback,
     52       const net::HttpResponseHeaders* original_response_headers,
     53       scoped_refptr<net::HttpResponseHeaders>* _response_headers,
     54       GURL* allowed_unsafe_redirect_url) OVERRIDE {
     55     return net::OK;
     56   }
     57 
     58   virtual void OnBeforeRedirect(net::URLRequest* request,
     59                                 const GURL& new_location) OVERRIDE {}
     60 
     61   virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE {}
     62 
     63   virtual void OnRawBytesRead(const net::URLRequest& request,
     64                               int bytes_read) OVERRIDE {}
     65 
     66   virtual void OnCompleted(net::URLRequest* request, bool started) OVERRIDE {}
     67 
     68   virtual void OnURLRequestDestroyed(net::URLRequest* request) OVERRIDE {}
     69 
     70   virtual void OnPACScriptError(int line_number,
     71                                 const base::string16& error) OVERRIDE {}
     72 
     73   virtual NetworkDelegate::AuthRequiredResponse OnAuthRequired(
     74       net::URLRequest* request,
     75       const net::AuthChallengeInfo& auth_info,
     76       const AuthCallback& callback,
     77       net::AuthCredentials* credentials) OVERRIDE {
     78     return net::NetworkDelegate::AUTH_REQUIRED_RESPONSE_NO_ACTION;
     79   }
     80 
     81   virtual bool OnCanGetCookies(const net::URLRequest& request,
     82                                const net::CookieList& cookie_list) OVERRIDE {
     83     return false;
     84   }
     85 
     86   virtual bool OnCanSetCookie(const net::URLRequest& request,
     87                               const std::string& cookie_line,
     88                               net::CookieOptions* options) OVERRIDE {
     89     return false;
     90   }
     91 
     92   virtual bool OnCanAccessFile(const net::URLRequest& request,
     93                                const base::FilePath& path) const OVERRIDE {
     94     return false;
     95   }
     96 
     97   virtual bool OnCanThrottleRequest(
     98       const net::URLRequest& request) const OVERRIDE {
     99     return false;
    100   }
    101 
    102   virtual int OnBeforeSocketStreamConnect(
    103       net::SocketStream* stream,
    104       const net::CompletionCallback& callback) OVERRIDE {
    105     return net::OK;
    106   }
    107 
    108   DISALLOW_COPY_AND_ASSIGN(BasicNetworkDelegate);
    109 };
    110 
    111 }  // namespace
    112 
    113 namespace cronet {
    114 
    115 URLRequestContextAdapter::URLRequestContextAdapter(
    116     URLRequestContextAdapterDelegate* delegate,
    117     std::string user_agent) {
    118   delegate_ = delegate;
    119   user_agent_ = user_agent;
    120 }
    121 
    122 void URLRequestContextAdapter::Initialize(
    123     scoped_ptr<URLRequestContextConfig> config) {
    124   network_thread_ = new base::Thread("network");
    125   base::Thread::Options options;
    126   options.message_loop_type = base::MessageLoop::TYPE_IO;
    127   network_thread_->StartWithOptions(options);
    128 
    129   GetNetworkTaskRunner()->PostTask(
    130       FROM_HERE,
    131       base::Bind(&URLRequestContextAdapter::InitializeURLRequestContext,
    132                  this,
    133                  Passed(&config)));
    134 }
    135 
    136 void URLRequestContextAdapter::InitializeURLRequestContext(
    137     scoped_ptr<URLRequestContextConfig> config) {
    138   // TODO(mmenke):  Add method to have the builder enable SPDY.
    139   net::URLRequestContextBuilder context_builder;
    140   context_builder.set_network_delegate(new BasicNetworkDelegate());
    141   context_builder.set_proxy_config_service(
    142       new net::ProxyConfigServiceFixed(net::ProxyConfig()));
    143   config->ConfigureURLRequestContextBuilder(&context_builder);
    144 
    145   context_.reset(context_builder.Build());
    146 
    147   // Currently (circa M39) enabling QUIC requires setting probability threshold.
    148   if (config->enable_quic) {
    149     context_->http_server_properties()
    150         ->SetAlternateProtocolProbabilityThreshold(0.0f);
    151     for (size_t hint = 0; hint < config->quic_hints.size(); ++hint) {
    152       const URLRequestContextConfig::QuicHint& quic_hint =
    153           *config->quic_hints[hint];
    154       if (quic_hint.host.empty()) {
    155         LOG(ERROR) << "Empty QUIC hint host: " << quic_hint.host;
    156         continue;
    157       }
    158 
    159       if (quic_hint.port <= std::numeric_limits<uint16>::min() ||
    160           quic_hint.port > std::numeric_limits<uint16>::max()) {
    161         LOG(ERROR) << "Invalid QUIC hint port: "
    162                    << quic_hint.port;
    163         continue;
    164       }
    165 
    166       if (quic_hint.alternate_port <= std::numeric_limits<uint16>::min() ||
    167           quic_hint.alternate_port > std::numeric_limits<uint16>::max()) {
    168         LOG(ERROR) << "Invalid QUIC hint alternate port: "
    169                    << quic_hint.alternate_port;
    170         continue;
    171       }
    172 
    173       net::HostPortPair quic_hint_host_port_pair(quic_hint.host,
    174                                                  quic_hint.port);
    175       context_->http_server_properties()->SetAlternateProtocol(
    176           quic_hint_host_port_pair,
    177           static_cast<uint16>(quic_hint.alternate_port),
    178           net::AlternateProtocol::QUIC,
    179           1.0f);
    180     }
    181   }
    182 
    183   if (VLOG_IS_ON(2)) {
    184     net_log_observer_.reset(new NetLogObserver());
    185     context_->net_log()->AddThreadSafeObserver(net_log_observer_.get(),
    186                                                net::NetLog::LOG_ALL_BUT_BYTES);
    187   }
    188 
    189   delegate_->OnContextInitialized(this);
    190 }
    191 
    192 URLRequestContextAdapter::~URLRequestContextAdapter() {
    193   if (net_log_observer_) {
    194     context_->net_log()->RemoveThreadSafeObserver(net_log_observer_.get());
    195     net_log_observer_.reset();
    196   }
    197   StopNetLog();
    198   // TODO(mef): Ensure that |network_thread_| is destroyed properly.
    199 }
    200 
    201 const std::string& URLRequestContextAdapter::GetUserAgent(
    202     const GURL& url) const {
    203   return user_agent_;
    204 }
    205 
    206 net::URLRequestContext* URLRequestContextAdapter::GetURLRequestContext() {
    207   if (!context_) {
    208     LOG(ERROR) << "URLRequestContext is not set up";
    209   }
    210   return context_.get();
    211 }
    212 
    213 scoped_refptr<base::SingleThreadTaskRunner>
    214 URLRequestContextAdapter::GetNetworkTaskRunner() const {
    215   return network_thread_->message_loop_proxy();
    216 }
    217 
    218 void URLRequestContextAdapter::StartNetLogToFile(const std::string& file_name) {
    219   // Do nothing if already logging to a file.
    220   if (net_log_logger_)
    221     return;
    222 
    223   base::FilePath file_path(file_name);
    224   FILE* file = base::OpenFile(file_path, "w");
    225   if (!file)
    226     return;
    227 
    228   scoped_ptr<base::Value> constants(net::NetLogLogger::GetConstants());
    229   net_log_logger_.reset(new net::NetLogLogger(file, *constants));
    230   net_log_logger_->StartObserving(context_->net_log());
    231 }
    232 
    233 void URLRequestContextAdapter::StopNetLog() {
    234   if (net_log_logger_) {
    235     net_log_logger_->StopObserving();
    236     net_log_logger_.reset();
    237   }
    238 }
    239 
    240 void NetLogObserver::OnAddEntry(const net::NetLog::Entry& entry) {
    241   VLOG(2) << "Net log entry: type=" << entry.type()
    242           << ", source=" << entry.source().type << ", phase=" << entry.phase();
    243 }
    244 
    245 }  // namespace cronet
    246