chrome/browser/net/chrome_network_delegate.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 "chrome/browser/net/chrome_network_delegate.h"
   6
   7 #include <stdlib.h>
   8
   9 #include <vector>
  10
  11 #include "base/base_paths.h"
  12 #include "base/command_line.h"
  13 #include "base/debug/alias.h"
  14 #include "base/debug/dump_without_crashing.h"
  15 #include "base/debug/stack_trace.h"
  16 #include "base/logging.h"
  17 #include "base/metrics/histogram.h"
  18 #include "base/metrics/sparse_histogram.h"
  19 #include "base/metrics/user_metrics.h"
  20 #include "base/path_service.h"
  21 #include "base/prefs/pref_member.h"
  22 #include "base/prefs/pref_service.h"
  23 #include "base/profiler/scoped_tracker.h"
  24 #include "base/strings/string_number_conversions.h"
  25 #include "base/strings/string_util.h"
  26 #include "base/time/time.h"
  27 #include "chrome/browser/browser_process.h"
  28 #include "chrome/browser/content_settings/cookie_settings_factory.h"
  29 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
  30 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
  31 #include "chrome/browser/net/chrome_extensions_network_delegate.h"
  32 #include "chrome/browser/net/connect_interceptor.h"
  33 #include "chrome/browser/net/request_source_bandwidth_histograms.h"
  34 #include "chrome/browser/net/safe_search_util.h"
  35 #include "chrome/browser/profiles/profile_manager.h"
  36 #include "chrome/browser/task_manager/task_manager.h"
  37 #include "chrome/common/pref_names.h"
  38 #include "components/content_settings/core/browser/cookie_settings.h"
  39 #include "components/domain_reliability/monitor.h"
  40 #include "content/public/browser/browser_thread.h"
  41 #include "content/public/browser/render_frame_host.h"
  42 #include "content/public/browser/render_view_host.h"
  43 #include "content/public/browser/resource_request_info.h"
  44 #include "content/public/common/content_switches.h"
  45 #include "content/public/common/process_type.h"
  46 #include "net/base/host_port_pair.h"
  47 #include "net/base/load_flags.h"
  48 #include "net/base/net_errors.h"
  49 #include "net/cookies/canonical_cookie.h"
  50 #include "net/cookies/cookie_options.h"
  51 #include "net/http/http_request_headers.h"
  52 #include "net/http/http_response_headers.h"
  53 #include "net/http/http_status_code.h"
  54 #include "net/log/net_log.h"
  55 #include "net/url_request/url_request.h"
  56
  57 #if defined(OS_ANDROID)
  58 #include "chrome/browser/io_thread.h"
  59 #include "chrome/browser/precache/precache_manager_factory.h"
  60 #include "components/precache/content/precache_manager.h"
  61 #endif
  62
  63 #if defined(OS_CHROMEOS)
  64 #include "base/sys_info.h"
  65 #include "chrome/common/chrome_switches.h"
  66 #endif
  67
  68 #if defined(ENABLE_CONFIGURATION_POLICY)
  69 #include "components/policy/core/browser/url_blacklist_manager.h"
  70 #endif
  71
  72 #if defined(ENABLE_EXTENSIONS)
  73 #include "extensions/common/constants.h"
  74 #endif
  75
  76 using content::BrowserThread;
  77 using content::RenderViewHost;
  78 using content::ResourceRequestInfo;
  79 using content::ResourceType;
  80
  81 // By default we don't allow access to all file:// urls on ChromeOS and
  82 // Android.
  83 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  84 bool ChromeNetworkDelegate::g_allow_file_access_ = false;
  85 #else
  86 bool ChromeNetworkDelegate::g_allow_file_access_ = true;
  87 #endif
  88
  89 namespace {
  90
  91 const char kDNTHeader[] = "DNT";
  92
  93 // Gets called when the extensions finish work on the URL. If the extensions
  94 // did not do a redirect (so |new_url| is empty) then we enforce the
  95 // SafeSearch parameters. Otherwise we will get called again after the
  96 // redirect and we enforce SafeSearch then.
  97 void ForceGoogleSafeSearchCallbackWrapper(
  98     const net::CompletionCallback& callback,
  99     net::URLRequest* request,
 100     GURL* new_url,
 101     int rv) {
 102   if (rv == net::OK && new_url->is_empty())
 103     safe_search_util::ForceGoogleSafeSearch(request, new_url);
 104   callback.Run(rv);
 105 }
 106
 107 #if defined(OS_ANDROID)
 108 void RecordPrecacheStatsOnUIThread(const GURL& url,
 109                                    const base::Time& fetch_time, int64 size,
 110                                    bool was_cached, void* profile_id) {
 111   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 112
 113   Profile* profile = reinterpret_cast<Profile*>(profile_id);
 114   if (!g_browser_process->profile_manager()->IsValidProfile(profile)) {
 115     return;
 116   }
 117
 118   precache::PrecacheManager* precache_manager =
 119       precache::PrecacheManagerFactory::GetForBrowserContext(profile);
 120   if (!precache_manager || !precache_manager->IsPrecachingAllowed()) {
 121     // |precache_manager| could be NULL if the profile is off the record.
 122     return;
 123   }
 124
 125   precache_manager->RecordStatsForFetch(url, fetch_time, size, was_cached);
 126 }
 127 #endif  // defined(OS_ANDROID)
 128
 129 void ReportInvalidReferrerSendOnUI() {
 130   base::RecordAction(
 131       base::UserMetricsAction("Net.URLRequest_StartJob_InvalidReferrer"));
 132 }
 133
 134 void ReportInvalidReferrerSend(const GURL& target_url,
 135                                const GURL& referrer_url) {
 136   LOG(ERROR) << "Cancelling request to " << target_url
 137              << " with invalid referrer " << referrer_url;
 138   // Record information to help debug http://crbug.com/422871
 139   if (!target_url.SchemeIsHTTPOrHTTPS())
 140     return;
 141   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 142                           base::Bind(&ReportInvalidReferrerSendOnUI));
 143   base::debug::DumpWithoutCrashing();
 144   NOTREACHED();
 145 }
 146
 147 // Record network errors that HTTP requests complete with, including OK and
 148 // ABORTED.
 149 void RecordNetworkErrorHistograms(const net::URLRequest* request) {
 150   if (request->url().SchemeIs("http")) {
 151     UMA_HISTOGRAM_SPARSE_SLOWLY("Net.HttpRequestCompletionErrorCodes",
 152                                 std::abs(request->status().error()));
 153
 154     if (request->load_flags() & net::LOAD_MAIN_FRAME) {
 155       UMA_HISTOGRAM_SPARSE_SLOWLY(
 156           "Net.HttpRequestCompletionErrorCodes.MainFrame",
 157           std::abs(request->status().error()));
 158     }
 159   }
 160 }
 161
 162 // Returns whether |request| is likely to be eligible for delta-encoding.
 163 // This is only a rough approximation right now, based on MIME type.
 164 bool CanRequestBeDeltaEncoded(const net::URLRequest* request) {
 165   struct {
 166     const char *prefix;
 167     const char *suffix;
 168   } kEligibleMasks[] = {
 169     // All text/ types are eligible, even if not displayable.
 170     { "text/", NULL },
 171     // JSON (application/json and application/*+json) is eligible.
 172     { "application/", "json" },
 173     // Javascript is eligible.
 174     { "application/", "javascript" },
 175     // XML (application/xml and application/*+xml) is eligible.
 176     { "application/", "xml" },
 177   };
 178
 179   std::string mime_type;
 180   request->GetMimeType(&mime_type);
 181
 182   for (size_t i = 0; i < arraysize(kEligibleMasks); i++) {
 183     const char *prefix = kEligibleMasks[i].prefix;
 184     const char *suffix = kEligibleMasks[i].suffix;
 185     if (prefix &&
 186         !base::StartsWith(mime_type, prefix, base::CompareCase::SENSITIVE))
 187       continue;
 188     if (suffix &&
 189         !base::EndsWith(mime_type, suffix, base::CompareCase::SENSITIVE))
 190       continue;
 191     return true;
 192   }
 193   return false;
 194 }
 195
 196 // Returns whether |request| was issued by a renderer process, as opposed to
 197 // the browser process or a plugin process.
 198 bool IsRendererInitiatedRequest(const net::URLRequest* request) {
 199   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
 200   return info && info->GetProcessType() == content::PROCESS_TYPE_RENDERER;
 201 }
 202
 203 // Uploads UMA histograms for delta encoding eligibility. This method can only
 204 // be safely called after the network stack has called both OnStarted and
 205 // OnCompleted, since it needs the received response content length and the
 206 // response headers.
 207 void RecordCacheStateStats(const net::URLRequest* request) {
 208   net::HttpRequestHeaders request_headers;
 209   if (!request->GetFullRequestHeaders(&request_headers)) {
 210     // GetFullRequestHeaders is guaranteed to succeed if OnResponseStarted() has
 211     // been called on |request|, so if GetFullRequestHeaders() fails,
 212     // RecordCacheStateStats must have been called before
 213     // OnResponseStarted().
 214     return;
 215   }
 216
 217   if (!IsRendererInitiatedRequest(request)) {
 218     // Ignore browser-initiated requests. These are internal requests like safe
 219     // browsing and sync, and so on. Some of these could be eligible for
 220     // delta-encoding, but to be conservative this function ignores all of them.
 221     return;
 222   }
 223
 224   const int kCacheAffectingFlags = net::LOAD_BYPASS_CACHE |
 225                                    net::LOAD_DISABLE_CACHE |
 226                                    net::LOAD_PREFERRING_CACHE;
 227
 228   if (request->load_flags() & kCacheAffectingFlags) {
 229     // Ignore requests with cache-affecting flags, which would otherwise mess up
 230     // these stats.
 231     return;
 232   }
 233
 234   enum {
 235     CACHE_STATE_FROM_CACHE,
 236     CACHE_STATE_STILL_VALID,
 237     CACHE_STATE_NO_LONGER_VALID,
 238     CACHE_STATE_NO_ENTRY,
 239     CACHE_STATE_MAX,
 240   } state = CACHE_STATE_NO_ENTRY;
 241   bool had_cache_headers =
 242       request_headers.HasHeader(net::HttpRequestHeaders::kIfModifiedSince) ||
 243       request_headers.HasHeader(net::HttpRequestHeaders::kIfNoneMatch) ||
 244       request_headers.HasHeader(net::HttpRequestHeaders::kIfRange);
 245   if (request->was_cached() && !had_cache_headers) {
 246     // Entry was served directly from cache.
 247     state = CACHE_STATE_FROM_CACHE;
 248   } else if (request->was_cached() && had_cache_headers) {
 249     // Expired entry was present in cache, and server responded with NOT
 250     // MODIFIED, indicating the expired entry is still valid.
 251     state = CACHE_STATE_STILL_VALID;
 252   } else if (!request->was_cached() && had_cache_headers) {
 253     // Expired entry was present in cache, and server responded with something
 254     // other than NOT MODIFIED, indicating the entry is no longer valid.
 255     state = CACHE_STATE_NO_LONGER_VALID;
 256   } else if (!request->was_cached() && !had_cache_headers) {
 257     // Neither |was_cached| nor |had_cache_headers|, so there's no local cache
 258     // entry for this content at all.
 259     state = CACHE_STATE_NO_ENTRY;
 260   }
 261
 262   UMA_HISTOGRAM_ENUMERATION("Net.CacheState.AllRequests", state,
 263                             CACHE_STATE_MAX);
 264   if (CanRequestBeDeltaEncoded(request)) {
 265     UMA_HISTOGRAM_ENUMERATION("Net.CacheState.EncodeableRequests", state,
 266                               CACHE_STATE_MAX);
 267   }
 268
 269   int64 size = request->received_response_content_length();
 270   if (size >= 0 && state == CACHE_STATE_NO_LONGER_VALID) {
 271     UMA_HISTOGRAM_COUNTS("Net.CacheState.AllBytes", size);
 272     if (CanRequestBeDeltaEncoded(request)) {
 273       UMA_HISTOGRAM_COUNTS("Net.CacheState.EncodeableBytes", size);
 274     }
 275   }
 276 }
 277
 278 }  // namespace
 279
 280 ChromeNetworkDelegate::ChromeNetworkDelegate(
 281     extensions::EventRouterForwarder* event_router,
 282     BooleanPrefMember* enable_referrers)
 283     : profile_(NULL),
 284       enable_referrers_(enable_referrers),
 285       enable_do_not_track_(NULL),
 286       force_google_safe_search_(NULL),
 287       force_youtube_safety_mode_(NULL),
 288 #if defined(ENABLE_CONFIGURATION_POLICY)
 289       url_blacklist_manager_(NULL),
 290 #endif
 291       domain_reliability_monitor_(NULL),
 292       experimental_web_platform_features_enabled_(
 293           base::CommandLine::ForCurrentProcess()->HasSwitch(
 294               switches::kEnableExperimentalWebPlatformFeatures)) {
 295   DCHECK(enable_referrers);
 296   extensions_delegate_.reset(
 297       ChromeExtensionsNetworkDelegate::Create(event_router));
 298 }
 299
 300 ChromeNetworkDelegate::~ChromeNetworkDelegate() {}
 301
 302 void ChromeNetworkDelegate::set_extension_info_map(
 303     extensions::InfoMap* extension_info_map) {
 304   extensions_delegate_->set_extension_info_map(extension_info_map);
 305 }
 306
 307 void ChromeNetworkDelegate::set_profile(void* profile) {
 308   profile_ = profile;
 309   extensions_delegate_->set_profile(profile);
 310 }
 311
 312 void ChromeNetworkDelegate::set_cookie_settings(
 313     content_settings::CookieSettings* cookie_settings) {
 314   cookie_settings_ = cookie_settings;
 315 }
 316
 317 void ChromeNetworkDelegate::set_predictor(
 318     chrome_browser_net::Predictor* predictor) {
 319   connect_interceptor_.reset(
 320       new chrome_browser_net::ConnectInterceptor(predictor));
 321 }
 322
 323 // static
 324 void ChromeNetworkDelegate::InitializePrefsOnUIThread(
 325     BooleanPrefMember* enable_referrers,
 326     BooleanPrefMember* enable_do_not_track,
 327     BooleanPrefMember* force_google_safe_search,
 328     BooleanPrefMember* force_youtube_safety_mode,
 329     PrefService* pref_service) {
 330   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 331   enable_referrers->Init(prefs::kEnableReferrers, pref_service);
 332   enable_referrers->MoveToThread(
 333       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 334   if (enable_do_not_track) {
 335     enable_do_not_track->Init(prefs::kEnableDoNotTrack, pref_service);
 336     enable_do_not_track->MoveToThread(
 337         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 338   }
 339   if (force_google_safe_search) {
 340     force_google_safe_search->Init(prefs::kForceGoogleSafeSearch, pref_service);
 341     force_google_safe_search->MoveToThread(
 342         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 343   }
 344   if (force_youtube_safety_mode) {
 345     force_youtube_safety_mode->Init(prefs::kForceYouTubeSafetyMode,
 346                                     pref_service);
 347     force_youtube_safety_mode->MoveToThread(
 348         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 349   }
 350 }
 351
 352 // static
 353 void ChromeNetworkDelegate::AllowAccessToAllFiles() {
 354   g_allow_file_access_ = true;
 355 }
 356
 357 int ChromeNetworkDelegate::OnBeforeURLRequest(
 358     net::URLRequest* request,
 359     const net::CompletionCallback& callback,
 360     GURL* new_url) {
 361   // TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
 362   tracked_objects::ScopedTracker tracking_profile1(
 363       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 364           "456327 URLRequest::ChromeNetworkDelegate::OnBeforeURLRequest"));
 365
 366 #if defined(ENABLE_CONFIGURATION_POLICY)
 367   // TODO(joaodasilva): This prevents extensions from seeing URLs that are
 368   // blocked. However, an extension might redirect the request to another URL,
 369   // which is not blocked.
 370
 371   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
 372   int error = net::ERR_BLOCKED_BY_ADMINISTRATOR;
 373   if (info && content::IsResourceTypeFrame(info->GetResourceType()) &&
 374       url_blacklist_manager_ &&
 375       url_blacklist_manager_->ShouldBlockRequestForFrame(
 376           request->url(), &error)) {
 377     // URL access blocked by policy.
 378     request->net_log().AddEvent(
 379         net::NetLog::TYPE_CHROME_POLICY_ABORTED_REQUEST,
 380         net::NetLog::StringCallback("url",
 381                                     &request->url().possibly_invalid_spec()));
 382     return error;
 383   }
 384 #endif
 385
 386   // TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
 387   tracked_objects::ScopedTracker tracking_profile2(
 388       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 389           "456327 URLRequest::ChromeNetworkDelegate::OnBeforeURLRequest 2"));
 390
 391   extensions_delegate_->ForwardStartRequestStatus(request);
 392
 393   if (!enable_referrers_->GetValue())
 394     request->SetReferrer(std::string());
 395   if (enable_do_not_track_ && enable_do_not_track_->GetValue())
 396     request->SetExtraRequestHeaderByName(kDNTHeader, "1", true /* override */);
 397
 398   // TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
 399   tracked_objects::ScopedTracker tracking_profile3(
 400       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 401           "456327 URLRequest::ChromeNetworkDelegate::OnBeforeURLRequest 3"));
 402
 403   bool force_safe_search =
 404       (force_google_safe_search_ && force_google_safe_search_->GetValue());
 405
 406   net::CompletionCallback wrapped_callback = callback;
 407   if (force_safe_search) {
 408     wrapped_callback = base::Bind(&ForceGoogleSafeSearchCallbackWrapper,
 409                                   callback,
 410                                   base::Unretained(request),
 411                                   base::Unretained(new_url));
 412   }
 413
 414   int rv = extensions_delegate_->OnBeforeURLRequest(
 415       request, wrapped_callback, new_url);
 416
 417   // TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
 418   tracked_objects::ScopedTracker tracking_profile4(
 419       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 420           "456327 URLRequest::ChromeNetworkDelegate::OnBeforeURLRequest 4"));
 421
 422   if (force_safe_search && rv == net::OK && new_url->is_empty())
 423     safe_search_util::ForceGoogleSafeSearch(request, new_url);
 424
 425   // TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
 426   tracked_objects::ScopedTracker tracking_profile5(
 427       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 428           "456327 URLRequest::ChromeNetworkDelegate::OnBeforeURLRequest 5"));
 429
 430   if (connect_interceptor_)
 431     connect_interceptor_->WitnessURLRequest(request);
 432
 433   return rv;
 434 }
 435
 436 int ChromeNetworkDelegate::OnBeforeSendHeaders(
 437     net::URLRequest* request,
 438     const net::CompletionCallback& callback,
 439     net::HttpRequestHeaders* headers) {
 440   if (force_youtube_safety_mode_ && force_youtube_safety_mode_->GetValue())
 441     safe_search_util::ForceYouTubeSafetyMode(request, headers);
 442
 443   return extensions_delegate_->OnBeforeSendHeaders(request, callback, headers);
 444 }
 445
 446 void ChromeNetworkDelegate::OnSendHeaders(
 447     net::URLRequest* request,
 448     const net::HttpRequestHeaders& headers) {
 449   extensions_delegate_->OnSendHeaders(request, headers);
 450 }
 451
 452 int ChromeNetworkDelegate::OnHeadersReceived(
 453     net::URLRequest* request,
 454     const net::CompletionCallback& callback,
 455     const net::HttpResponseHeaders* original_response_headers,
 456     scoped_refptr<net::HttpResponseHeaders>* override_response_headers,
 457     GURL* allowed_unsafe_redirect_url) {
 458   return extensions_delegate_->OnHeadersReceived(
 459       request,
 460       callback,
 461       original_response_headers,
 462       override_response_headers,
 463       allowed_unsafe_redirect_url);
 464 }
 465
 466 void ChromeNetworkDelegate::OnBeforeRedirect(net::URLRequest* request,
 467                                              const GURL& new_location) {
 468   if (domain_reliability_monitor_)
 469     domain_reliability_monitor_->OnBeforeRedirect(request);
 470   extensions_delegate_->OnBeforeRedirect(request, new_location);
 471 }
 472
 473
 474 void ChromeNetworkDelegate::OnResponseStarted(net::URLRequest* request) {
 475   extensions_delegate_->OnResponseStarted(request);
 476 }
 477
 478 void ChromeNetworkDelegate::OnRawBytesRead(const net::URLRequest& request,
 479                                            int bytes_read) {
 480 #if defined(ENABLE_TASK_MANAGER)
 481   // This is not completely accurate, but as a first approximation ignore
 482   // requests that are served from the cache. See bug 330931 for more info.
 483   if (!request.was_cached())
 484     TaskManager::GetInstance()->model()->NotifyBytesRead(request, bytes_read);
 485 #endif  // defined(ENABLE_TASK_MANAGER)
 486 }
 487
 488 void ChromeNetworkDelegate::OnCompleted(net::URLRequest* request,
 489                                         bool started) {
 490   RecordNetworkErrorHistograms(request);
 491   if (started) {
 492     // Only call in for requests that were started, to obey the precondition
 493     // that RecordCacheStateStats can only be called on requests for which
 494     // OnResponseStarted was called.
 495     RecordCacheStateStats(request);
 496   }
 497
 498   if (request->status().status() == net::URLRequestStatus::SUCCESS) {
 499 #if defined(OS_ANDROID)
 500     // For better accuracy, we use the actual bytes read instead of the length
 501     // specified with the Content-Length header, which may be inaccurate,
 502     // or missing, as is the case with chunked encoding.
 503     int64 received_content_length = request->received_response_content_length();
 504
 505     // Record precache metrics when a fetch is completed successfully.
 506     BrowserThread::PostTask(
 507         BrowserThread::UI, FROM_HERE,
 508         base::Bind(&RecordPrecacheStatsOnUIThread, request->url(),
 509                    base::Time::Now(), received_content_length,
 510                    request->was_cached(), profile_));
 511 #endif  // defined(OS_ANDROID)
 512     extensions_delegate_->OnCompleted(request, started);
 513   } else if (request->status().status() == net::URLRequestStatus::FAILED ||
 514              request->status().status() == net::URLRequestStatus::CANCELED) {
 515     extensions_delegate_->OnCompleted(request, started);
 516   } else {
 517     NOTREACHED();
 518   }
 519   if (domain_reliability_monitor_)
 520     domain_reliability_monitor_->OnCompleted(request, started);
 521   RecordRequestSourceBandwidth(request, started);
 522   extensions_delegate_->ForwardProxyErrors(request);
 523   extensions_delegate_->ForwardDoneRequestStatus(request);
 524 }
 525
 526 void ChromeNetworkDelegate::OnURLRequestDestroyed(net::URLRequest* request) {
 527   extensions_delegate_->OnURLRequestDestroyed(request);
 528 }
 529
 530 void ChromeNetworkDelegate::OnPACScriptError(int line_number,
 531                                              const base::string16& error) {
 532   extensions_delegate_->OnPACScriptError(line_number, error);
 533 }
 534
 535 net::NetworkDelegate::AuthRequiredResponse
 536 ChromeNetworkDelegate::OnAuthRequired(
 537     net::URLRequest* request,
 538     const net::AuthChallengeInfo& auth_info,
 539     const AuthCallback& callback,
 540     net::AuthCredentials* credentials) {
 541   return extensions_delegate_->OnAuthRequired(
 542       request, auth_info, callback, credentials);
 543 }
 544
 545 bool ChromeNetworkDelegate::OnCanGetCookies(
 546     const net::URLRequest& request,
 547     const net::CookieList& cookie_list) {
 548   // NULL during tests, or when we're running in the system context.
 549   if (!cookie_settings_.get())
 550     return true;
 551
 552   bool allow = cookie_settings_->IsReadingCookieAllowed(
 553       request.url(), request.first_party_for_cookies());
 554
 555   int render_process_id = -1;
 556   int render_frame_id = -1;
 557   if (content::ResourceRequestInfo::GetRenderFrameForRequest(
 558           &request, &render_process_id, &render_frame_id)) {
 559     BrowserThread::PostTask(
 560         BrowserThread::UI, FROM_HERE,
 561         base::Bind(&TabSpecificContentSettings::CookiesRead,
 562                    render_process_id, render_frame_id,
 563                    request.url(), request.first_party_for_cookies(),
 564                    cookie_list, !allow));
 565   }
 566
 567   return allow;
 568 }
 569
 570 bool ChromeNetworkDelegate::OnCanSetCookie(const net::URLRequest& request,
 571                                            const std::string& cookie_line,
 572                                            net::CookieOptions* options) {
 573   // NULL during tests, or when we're running in the system context.
 574   if (!cookie_settings_.get())
 575     return true;
 576
 577   bool allow = cookie_settings_->IsSettingCookieAllowed(
 578       request.url(), request.first_party_for_cookies());
 579
 580   int render_process_id = -1;
 581   int render_frame_id = -1;
 582   if (content::ResourceRequestInfo::GetRenderFrameForRequest(
 583           &request, &render_process_id, &render_frame_id)) {
 584     BrowserThread::PostTask(
 585         BrowserThread::UI, FROM_HERE,
 586         base::Bind(&TabSpecificContentSettings::CookieChanged,
 587                    render_process_id, render_frame_id,
 588                    request.url(), request.first_party_for_cookies(),
 589                    cookie_line, *options, !allow));
 590   }
 591
 592   return allow;
 593 }
 594
 595 bool ChromeNetworkDelegate::OnCanAccessFile(const net::URLRequest& request,
 596                                             const base::FilePath& path) const {
 597   if (g_allow_file_access_)
 598     return true;
 599
 600 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 601   return true;
 602 #else
 603 #if defined(OS_CHROMEOS)
 604   // If we're running Chrome for ChromeOS on Linux, we want to allow file
 605   // access.
 606   if (!base::SysInfo::IsRunningOnChromeOS() ||
 607       base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestType)) {
 608     return true;
 609   }
 610
 611   // Use a whitelist to only allow access to files residing in the list of
 612   // directories below.
 613   static const char* const kLocalAccessWhiteList[] = {
 614       "/home/chronos/user/Downloads",
 615       "/home/chronos/user/log",
 616       "/home/chronos/user/WebRTC Logs",
 617       "/media",
 618       "/opt/oem",
 619       "/usr/share/chromeos-assets",
 620       "/tmp",
 621       "/var/log",
 622   };
 623
 624   // The actual location of "/home/chronos/user/Xyz" is the Xyz directory under
 625   // the profile path ("/home/chronos/user' is a hard link to current primary
 626   // logged in profile.) For the support of multi-profile sessions, we are
 627   // switching to use explicit "$PROFILE_PATH/Xyz" path and here whitelist such
 628   // access.
 629   if (!profile_path_.empty()) {
 630     const base::FilePath downloads = profile_path_.AppendASCII("Downloads");
 631     if (downloads == path.StripTrailingSeparators() || downloads.IsParent(path))
 632       return true;
 633     const base::FilePath webrtc_logs = profile_path_.AppendASCII("WebRTC Logs");
 634     if (webrtc_logs == path.StripTrailingSeparators() ||
 635         webrtc_logs.IsParent(path)) {
 636       return true;
 637     }
 638   }
 639 #elif defined(OS_ANDROID)
 640   // Access to files in external storage is allowed.
 641   base::FilePath external_storage_path;
 642   PathService::Get(base::DIR_ANDROID_EXTERNAL_STORAGE, &external_storage_path);
 643   if (external_storage_path.IsParent(path))
 644     return true;
 645
 646   // Whitelist of other allowed directories.
 647   static const char* const kLocalAccessWhiteList[] = {
 648       "/sdcard",
 649       "/mnt/sdcard",
 650   };
 651 #endif
 652
 653   for (size_t i = 0; i < arraysize(kLocalAccessWhiteList); ++i) {
 654     const base::FilePath white_listed_path(kLocalAccessWhiteList[i]);
 655     // base::FilePath::operator== should probably handle trailing separators.
 656     if (white_listed_path == path.StripTrailingSeparators() ||
 657         white_listed_path.IsParent(path)) {
 658       return true;
 659     }
 660   }
 661
 662   DVLOG(1) << "File access denied - " << path.value().c_str();
 663   return false;
 664 #endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 665 }
 666
 667 bool ChromeNetworkDelegate::OnCanEnablePrivacyMode(
 668     const GURL& url,
 669     const GURL& first_party_for_cookies) const {
 670   // NULL during tests, or when we're running in the system context.
 671   if (!cookie_settings_.get())
 672     return false;
 673
 674   bool reading_cookie_allowed = cookie_settings_->IsReadingCookieAllowed(
 675       url, first_party_for_cookies);
 676   bool setting_cookie_allowed = cookie_settings_->IsSettingCookieAllowed(
 677       url, first_party_for_cookies);
 678   bool privacy_mode = !(reading_cookie_allowed && setting_cookie_allowed);
 679   return privacy_mode;
 680 }
 681
 682 bool ChromeNetworkDelegate::OnFirstPartyOnlyCookieExperimentEnabled() const {
 683   return experimental_web_platform_features_enabled_;
 684 }
 685
 686 bool ChromeNetworkDelegate::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
 687     const net::URLRequest& request,
 688     const GURL& target_url,
 689     const GURL& referrer_url) const {
 690   ReportInvalidReferrerSend(target_url, referrer_url);
 691   return true;
 692 }