src/components/domain_reliability/monitor.cc

   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/domain_reliability/monitor.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "base/single_thread_task_runner.h"
  10 #include "base/task_runner.h"
  11 #include "base/time/time.h"
  12 #include "components/domain_reliability/baked_in_configs.h"
  13 #include "net/base/load_flags.h"
  14 #include "net/http/http_response_headers.h"
  15 #include "net/url_request/url_request.h"
  16 #include "net/url_request/url_request_context.h"
  17 #include "net/url_request/url_request_context_getter.h"
  18
  19 namespace domain_reliability {
  20
  21 DomainReliabilityMonitor::DomainReliabilityMonitor(
  22     const std::string& upload_reporter_string,
  23     scoped_refptr<base::SingleThreadTaskRunner> pref_thread,
  24     scoped_refptr<base::SingleThreadTaskRunner> network_thread,
  25     PrefService* local_state_pref_service,
  26     const char* reporting_pref_name)
  27     : time_(new ActualTime()),
  28       upload_reporter_string_(upload_reporter_string),
  29       scheduler_params_(
  30           DomainReliabilityScheduler::Params::GetFromFieldTrialsOrDefaults()),
  31       dispatcher_(time_.get()),
  32       pref_task_runner_(pref_thread),
  33       network_task_runner_(network_thread),
  34       moved_to_network_thread_(false),
  35       weak_factory_(this) {
  36   DCHECK(OnPrefThread());
  37   InitReportingPref(local_state_pref_service, reporting_pref_name);
  38 }
  39
  40 DomainReliabilityMonitor::DomainReliabilityMonitor(
  41     const std::string& upload_reporter_string,
  42     scoped_refptr<base::SingleThreadTaskRunner> pref_thread,
  43     scoped_refptr<base::SingleThreadTaskRunner> network_thread,
  44     PrefService* local_state_pref_service,
  45     const char* reporting_pref_name,
  46     scoped_ptr<MockableTime> time)
  47     : time_(time.Pass()),
  48       upload_reporter_string_(upload_reporter_string),
  49       scheduler_params_(
  50           DomainReliabilityScheduler::Params::GetFromFieldTrialsOrDefaults()),
  51       dispatcher_(time_.get()),
  52       pref_task_runner_(pref_thread),
  53       network_task_runner_(network_thread),
  54       moved_to_network_thread_(false),
  55       weak_factory_(this) {
  56   DCHECK(OnPrefThread());
  57   InitReportingPref(local_state_pref_service, reporting_pref_name);
  58 }
  59
  60 DomainReliabilityMonitor::~DomainReliabilityMonitor() {
  61   if (moved_to_network_thread_)
  62     DCHECK(OnNetworkThread());
  63   else
  64     DCHECK(OnPrefThread());
  65
  66   ClearContexts();
  67 }
  68
  69 void DomainReliabilityMonitor::MoveToNetworkThread() {
  70   DCHECK(OnPrefThread());
  71   DCHECK(!moved_to_network_thread_);
  72
  73   reporting_pref_.MoveToThread(network_task_runner_);
  74   moved_to_network_thread_ = true;
  75 }
  76
  77 void DomainReliabilityMonitor::DestroyReportingPref() {
  78   DCHECK(OnPrefThread());
  79
  80   reporting_pref_.Destroy();
  81 }
  82
  83 void DomainReliabilityMonitor::InitURLRequestContext(
  84     net::URLRequestContext* url_request_context) {
  85   DCHECK(OnNetworkThread());
  86   DCHECK(moved_to_network_thread_);
  87
  88   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter =
  89       new net::TrivialURLRequestContextGetter(url_request_context,
  90                                               network_task_runner_);
  91   InitURLRequestContext(url_request_context_getter);
  92 }
  93
  94 void DomainReliabilityMonitor::InitURLRequestContext(
  95     scoped_refptr<net::URLRequestContextGetter> url_request_context_getter) {
  96   DCHECK(OnNetworkThread());
  97   DCHECK(moved_to_network_thread_);
  98
  99   // Make sure the URLRequestContext actually lives on what was declared to be
 100   // the network thread.
 101   DCHECK(url_request_context_getter->GetNetworkTaskRunner()->
 102          RunsTasksOnCurrentThread());
 103
 104   uploader_ = DomainReliabilityUploader::Create(url_request_context_getter);
 105   // Make sure the uploader is sending or discarding uploads according to pref.
 106   OnReportingPrefChanged();
 107 }
 108
 109 void DomainReliabilityMonitor::AddBakedInConfigs() {
 110   DCHECK(OnNetworkThread());
 111
 112   base::Time now = base::Time::Now();
 113   for (size_t i = 0; kBakedInJsonConfigs[i]; ++i) {
 114     std::string json(kBakedInJsonConfigs[i]);
 115     scoped_ptr<const DomainReliabilityConfig> config =
 116         DomainReliabilityConfig::FromJSON(json);
 117     if (config && config->IsExpired(now)) {
 118       LOG(WARNING) << "Baked-in Domain Reliability config for "
 119                    << config->domain << " is expired.";
 120       continue;
 121     }
 122     AddContext(config.Pass());
 123   }
 124 }
 125
 126 void DomainReliabilityMonitor::OnBeforeRedirect(net::URLRequest* request) {
 127   DCHECK(OnNetworkThread());
 128
 129   // Record the redirect itself in addition to the final request.
 130   OnRequestLegComplete(RequestInfo(*request));
 131 }
 132
 133 void DomainReliabilityMonitor::OnCompleted(net::URLRequest* request,
 134                                            bool started) {
 135   DCHECK(OnNetworkThread());
 136
 137   if (!started)
 138     return;
 139   RequestInfo request_info(*request);
 140   if (request_info.AccessedNetwork()) {
 141     OnRequestLegComplete(request_info);
 142     // A request was just using the network, so now is a good time to run any
 143     // pending and eligible uploads.
 144     dispatcher_.RunEligibleTasks();
 145   }
 146 }
 147
 148 void DomainReliabilityMonitor::ClearBrowsingData(
 149    DomainReliabilityClearMode mode) {
 150   DCHECK(OnNetworkThread());
 151
 152   switch (mode) {
 153     case CLEAR_BEACONS: {
 154       ContextMap::const_iterator it;
 155       for (it = contexts_.begin(); it != contexts_.end(); ++it)
 156         it->second->ClearBeacons();
 157       break;
 158     };
 159     case CLEAR_CONTEXTS:
 160       ClearContexts();
 161       break;
 162     case MAX_CLEAR_MODE:
 163       NOTREACHED();
 164   }
 165 }
 166
 167 scoped_ptr<base::Value> DomainReliabilityMonitor::GetWebUIData() const {
 168   DCHECK(OnNetworkThread());
 169
 170   base::ListValue* contexts_value = new base::ListValue();
 171   for (ContextMap::const_iterator it = contexts_.begin();
 172        it != contexts_.end();
 173        ++it) {
 174     contexts_value->Append(it->second->GetWebUIData().release());
 175   }
 176
 177   base::DictionaryValue* data_value = new base::DictionaryValue();
 178   data_value->Set("contexts", contexts_value);
 179
 180   return scoped_ptr<base::Value>(data_value);
 181 }
 182
 183 DomainReliabilityContext* DomainReliabilityMonitor::AddContextForTesting(
 184     scoped_ptr<const DomainReliabilityConfig> config) {
 185   DCHECK(OnNetworkThread());
 186
 187   return AddContext(config.Pass());
 188 }
 189
 190 DomainReliabilityMonitor::RequestInfo::RequestInfo() {}
 191
 192 DomainReliabilityMonitor::RequestInfo::RequestInfo(
 193     const net::URLRequest& request)
 194     : url(request.url()),
 195       status(request.status()),
 196       response_info(request.response_info()),
 197       load_flags(request.load_flags()),
 198       is_upload(DomainReliabilityUploader::URLRequestIsUpload(request)) {
 199   request.GetLoadTimingInfo(&load_timing_info);
 200 }
 201
 202 DomainReliabilityMonitor::RequestInfo::~RequestInfo() {}
 203
 204 bool DomainReliabilityMonitor::RequestInfo::AccessedNetwork() const {
 205   return status.status() != net::URLRequestStatus::CANCELED &&
 206      response_info.network_accessed;
 207 }
 208
 209 DomainReliabilityContext* DomainReliabilityMonitor::AddContext(
 210     scoped_ptr<const DomainReliabilityConfig> config) {
 211   DCHECK(OnNetworkThread());
 212   DCHECK(config);
 213   DCHECK(config->IsValid());
 214
 215   // Grab a copy of the domain before transferring ownership of |config|.
 216   std::string domain = config->domain;
 217
 218   DomainReliabilityContext* context =
 219       new DomainReliabilityContext(time_.get(),
 220                                    scheduler_params_,
 221                                    upload_reporter_string_,
 222                                    &dispatcher_,
 223                                    uploader_.get(),
 224                                    config.Pass());
 225
 226   std::pair<ContextMap::iterator, bool> map_it =
 227       contexts_.insert(make_pair(domain, context));
 228   // Make sure the domain wasn't already in the map.
 229   DCHECK(map_it.second);
 230
 231   return map_it.first->second;
 232 }
 233
 234 void DomainReliabilityMonitor::ClearContexts() {
 235   STLDeleteContainerPairSecondPointers(
 236       contexts_.begin(), contexts_.end());
 237   contexts_.clear();
 238 }
 239
 240 void DomainReliabilityMonitor::OnRequestLegComplete(
 241     const RequestInfo& request) {
 242   int response_code;
 243   if (request.response_info.headers.get())
 244     response_code = request.response_info.headers->response_code();
 245   else
 246     response_code = -1;
 247   std::string beacon_status;
 248
 249   int error_code = net::OK;
 250   if (request.status.status() == net::URLRequestStatus::FAILED)
 251     error_code = request.status.error();
 252
 253   DomainReliabilityContext* context = GetContextForHost(request.url.host());
 254
 255   // Ignore requests where:
 256   // 1. There is no context for the request host.
 257   // 2. The request did not access the network.
 258   // 3. The request is not supposed to send cookies (to avoid associating the
 259   //    request with any potentially unique data in the config).
 260   // 4. The request was itself a Domain Reliability upload (to avoid loops).
 261   // 5. There is no defined beacon status for the error or HTTP response code
 262   //    (to avoid leaking network-local errors).
 263   if (!context ||
 264       !request.AccessedNetwork() ||
 265       (request.load_flags & net::LOAD_DO_NOT_SEND_COOKIES) ||
 266       request.is_upload ||
 267       !GetDomainReliabilityBeaconStatus(
 268           error_code, response_code, &beacon_status)) {
 269     return;
 270   }
 271
 272   DomainReliabilityBeacon beacon;
 273   beacon.status = beacon_status;
 274   beacon.chrome_error = error_code;
 275   if (!request.response_info.was_fetched_via_proxy)
 276     beacon.server_ip = request.response_info.socket_address.host();
 277   else
 278     beacon.server_ip.clear();
 279   beacon.protocol = GetDomainReliabilityProtocol(
 280       request.response_info.connection_info,
 281       request.response_info.ssl_info.is_valid());
 282   beacon.http_response_code = response_code;
 283   beacon.start_time = request.load_timing_info.request_start;
 284   beacon.elapsed = time_->NowTicks() - beacon.start_time;
 285   beacon.domain = request.url.host();
 286   context->OnBeacon(request.url, beacon);
 287 }
 288
 289 void DomainReliabilityMonitor::InitReportingPref(
 290     PrefService* local_state_pref_service,
 291     const char* reporting_pref_name) {
 292   reporting_pref_.Init(
 293       reporting_pref_name,
 294       local_state_pref_service,
 295       base::Bind(&DomainReliabilityMonitor::OnReportingPrefChanged,
 296                  base::Unretained(this)));
 297 }
 298
 299 void DomainReliabilityMonitor::OnReportingPrefChanged() {
 300   DCHECK(OnNetworkThread());
 301
 302   // When metrics reporting is disabled, discard Domain Reliability uploads.
 303   if (uploader_)
 304     uploader_->set_discard_uploads(!*reporting_pref_);
 305 }
 306
 307 // TODO(ttuttle): Keep a separate wildcard_contexts_ map to avoid having to
 308 // prepend '*.' to domains.
 309 DomainReliabilityContext* DomainReliabilityMonitor::GetContextForHost(
 310     const std::string& host) const {
 311   DCHECK(OnNetworkThread());
 312
 313   ContextMap::const_iterator context_it;
 314
 315   context_it = contexts_.find(host);
 316   if (context_it != contexts_.end())
 317     return context_it->second;
 318
 319   std::string host_with_asterisk = "*." + host;
 320   context_it = contexts_.find(host_with_asterisk);
 321   if (context_it != contexts_.end())
 322     return context_it->second;
 323
 324   size_t dot_pos = host.find('.');
 325   if (dot_pos == std::string::npos)
 326     return NULL;
 327
 328   // TODO(ttuttle): Make sure parent is not in PSL before using.
 329
 330   std::string parent_with_asterisk = "*." + host.substr(dot_pos + 1);
 331   context_it = contexts_.find(parent_with_asterisk);
 332   if (context_it != contexts_.end())
 333     return context_it->second;
 334
 335   return NULL;
 336 }
 337
 338 base::WeakPtr<DomainReliabilityMonitor>
 339 DomainReliabilityMonitor::MakeWeakPtr() {
 340   return weak_factory_.GetWeakPtr();
 341 }
 342
 343 }  // namespace domain_reliability