content/child/web_url_loader_impl.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 "content/child/web_url_loader_impl.h"
   6
   7 #include <algorithm>
   8 #include <deque>
   9 #include <string>
  10
  11 #include "base/bind.h"
  12 #include "base/command_line.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/single_thread_task_runner.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/time/time.h"
  18 #include "components/mime_util/mime_util.h"
  19 #include "content/child/child_thread_impl.h"
  20 #include "content/child/ftp_directory_listing_response_delegate.h"
  21 #include "content/child/multipart_response_delegate.h"
  22 #include "content/child/request_extra_data.h"
  23 #include "content/child/request_info.h"
  24 #include "content/child/resource_dispatcher.h"
  25 #include "content/child/sync_load_response.h"
  26 #include "content/child/web_data_consumer_handle_impl.h"
  27 #include "content/child/web_url_request_util.h"
  28 #include "content/child/weburlresponse_extradata_impl.h"
  29 #include "content/common/resource_messages.h"
  30 #include "content/common/resource_request_body.h"
  31 #include "content/common/service_worker/service_worker_types.h"
  32 #include "content/public/child/request_peer.h"
  33 #include "content/public/common/content_switches.h"
  34 #include "net/base/data_url.h"
  35 #include "net/base/filename_util.h"
  36 #include "net/base/net_errors.h"
  37 #include "net/http/http_response_headers.h"
  38 #include "net/http/http_util.h"
  39 #include "net/url_request/redirect_info.h"
  40 #include "net/url_request/url_request_data_job.h"
  41 #include "third_party/WebKit/public/platform/WebHTTPLoadInfo.h"
  42 #include "third_party/WebKit/public/platform/WebURL.h"
  43 #include "third_party/WebKit/public/platform/WebURLError.h"
  44 #include "third_party/WebKit/public/platform/WebURLLoadTiming.h"
  45 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  46 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  47 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  48 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
  49 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
  50
  51 using base::Time;
  52 using base::TimeTicks;
  53 using blink::WebData;
  54 using blink::WebHTTPBody;
  55 using blink::WebHTTPHeaderVisitor;
  56 using blink::WebHTTPLoadInfo;
  57 using blink::WebReferrerPolicy;
  58 using blink::WebSecurityPolicy;
  59 using blink::WebString;
  60 using blink::WebURL;
  61 using blink::WebURLError;
  62 using blink::WebURLLoadTiming;
  63 using blink::WebURLLoader;
  64 using blink::WebURLLoaderClient;
  65 using blink::WebURLRequest;
  66 using blink::WebURLResponse;
  67
  68 namespace content {
  69
  70 // Utilities ------------------------------------------------------------------
  71
  72 namespace {
  73
  74 const size_t kBodyStreamPipeCapacity = 4 * 1024;
  75
  76 typedef ResourceDevToolsInfo::HeadersVector HeadersVector;
  77
  78 // Converts timing data from |load_timing| to the format used by WebKit.
  79 void PopulateURLLoadTiming(const net::LoadTimingInfo& load_timing,
  80                            WebURLLoadTiming* url_timing) {
  81   DCHECK(!load_timing.request_start.is_null());
  82
  83   const TimeTicks kNullTicks;
  84   url_timing->initialize();
  85   url_timing->setRequestTime(
  86       (load_timing.request_start - kNullTicks).InSecondsF());
  87   url_timing->setProxyStart(
  88       (load_timing.proxy_resolve_start - kNullTicks).InSecondsF());
  89   url_timing->setProxyEnd(
  90       (load_timing.proxy_resolve_end - kNullTicks).InSecondsF());
  91   url_timing->setDNSStart(
  92       (load_timing.connect_timing.dns_start - kNullTicks).InSecondsF());
  93   url_timing->setDNSEnd(
  94       (load_timing.connect_timing.dns_end - kNullTicks).InSecondsF());
  95   url_timing->setConnectStart(
  96       (load_timing.connect_timing.connect_start - kNullTicks).InSecondsF());
  97   url_timing->setConnectEnd(
  98       (load_timing.connect_timing.connect_end - kNullTicks).InSecondsF());
  99   url_timing->setSSLStart(
 100       (load_timing.connect_timing.ssl_start - kNullTicks).InSecondsF());
 101   url_timing->setSSLEnd(
 102       (load_timing.connect_timing.ssl_end - kNullTicks).InSecondsF());
 103   url_timing->setSendStart(
 104       (load_timing.send_start - kNullTicks).InSecondsF());
 105   url_timing->setSendEnd(
 106       (load_timing.send_end - kNullTicks).InSecondsF());
 107   url_timing->setReceiveHeadersEnd(
 108       (load_timing.receive_headers_end - kNullTicks).InSecondsF());
 109 }
 110
 111 net::RequestPriority ConvertWebKitPriorityToNetPriority(
 112     const WebURLRequest::Priority& priority) {
 113   switch (priority) {
 114     case WebURLRequest::PriorityVeryHigh:
 115       return net::HIGHEST;
 116
 117     case WebURLRequest::PriorityHigh:
 118       return net::MEDIUM;
 119
 120     case WebURLRequest::PriorityMedium:
 121       return net::LOW;
 122
 123     case WebURLRequest::PriorityLow:
 124       return net::LOWEST;
 125
 126     case WebURLRequest::PriorityVeryLow:
 127       return net::IDLE;
 128
 129     case WebURLRequest::PriorityUnresolved:
 130     default:
 131       NOTREACHED();
 132       return net::LOW;
 133   }
 134 }
 135
 136 // Extracts info from a data scheme URL into |info| and |data|. Returns net::OK
 137 // if successful. Returns a net error code otherwise. Exported only for testing.
 138 int GetInfoFromDataURL(const GURL& url,
 139                        ResourceResponseInfo* info,
 140                        std::string* data) {
 141   // Assure same time for all time fields of data: URLs.
 142   Time now = Time::Now();
 143   info->load_timing.request_start = TimeTicks::Now();
 144   info->load_timing.request_start_time = now;
 145   info->request_time = now;
 146   info->response_time = now;
 147
 148   std::string mime_type;
 149   std::string charset;
 150   scoped_refptr<net::HttpResponseHeaders> headers(
 151       new net::HttpResponseHeaders(std::string()));
 152   int result = net::URLRequestDataJob::BuildResponse(
 153       url, &mime_type, &charset, data, headers.get());
 154   if (result != net::OK)
 155     return result;
 156
 157   info->headers = headers;
 158   info->mime_type.swap(mime_type);
 159   info->charset.swap(charset);
 160   info->security_info.clear();
 161   info->content_length = data->length();
 162   info->encoded_data_length = 0;
 163
 164   return net::OK;
 165 }
 166
 167 #define STATIC_ASSERT_MATCHING_ENUMS(content_name, blink_name)       \
 168   static_assert(                                                     \
 169       static_cast<int>(content_name) == static_cast<int>(blink_name), \
 170       "mismatching enums: " #content_name)
 171
 172 STATIC_ASSERT_MATCHING_ENUMS(FETCH_REQUEST_MODE_SAME_ORIGIN,
 173                              WebURLRequest::FetchRequestModeSameOrigin);
 174 STATIC_ASSERT_MATCHING_ENUMS(FETCH_REQUEST_MODE_NO_CORS,
 175                              WebURLRequest::FetchRequestModeNoCORS);
 176 STATIC_ASSERT_MATCHING_ENUMS(FETCH_REQUEST_MODE_CORS,
 177                              WebURLRequest::FetchRequestModeCORS);
 178 STATIC_ASSERT_MATCHING_ENUMS(
 179     FETCH_REQUEST_MODE_CORS_WITH_FORCED_PREFLIGHT,
 180     WebURLRequest::FetchRequestModeCORSWithForcedPreflight);
 181
 182 FetchRequestMode GetFetchRequestMode(const WebURLRequest& request) {
 183   return static_cast<FetchRequestMode>(request.fetchRequestMode());
 184 }
 185
 186 STATIC_ASSERT_MATCHING_ENUMS(FETCH_CREDENTIALS_MODE_OMIT,
 187                              WebURLRequest::FetchCredentialsModeOmit);
 188 STATIC_ASSERT_MATCHING_ENUMS(FETCH_CREDENTIALS_MODE_SAME_ORIGIN,
 189                              WebURLRequest::FetchCredentialsModeSameOrigin);
 190 STATIC_ASSERT_MATCHING_ENUMS(FETCH_CREDENTIALS_MODE_INCLUDE,
 191                              WebURLRequest::FetchCredentialsModeInclude);
 192
 193 FetchCredentialsMode GetFetchCredentialsMode(const WebURLRequest& request) {
 194   return static_cast<FetchCredentialsMode>(request.fetchCredentialsMode());
 195 }
 196
 197 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_FRAME_TYPE_AUXILIARY,
 198                              WebURLRequest::FrameTypeAuxiliary);
 199 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_FRAME_TYPE_NESTED,
 200                              WebURLRequest::FrameTypeNested);
 201 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_FRAME_TYPE_NONE,
 202                              WebURLRequest::FrameTypeNone);
 203 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_FRAME_TYPE_TOP_LEVEL,
 204                              WebURLRequest::FrameTypeTopLevel);
 205
 206 RequestContextFrameType GetRequestContextFrameType(
 207     const WebURLRequest& request) {
 208   return static_cast<RequestContextFrameType>(request.frameType());
 209 }
 210
 211 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_UNSPECIFIED,
 212                              WebURLRequest::RequestContextUnspecified);
 213 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_AUDIO,
 214                              WebURLRequest::RequestContextAudio);
 215 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_BEACON,
 216                              WebURLRequest::RequestContextBeacon);
 217 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_CSP_REPORT,
 218                              WebURLRequest::RequestContextCSPReport);
 219 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_DOWNLOAD,
 220                              WebURLRequest::RequestContextDownload);
 221 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_EMBED,
 222                              WebURLRequest::RequestContextEmbed);
 223 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_EVENT_SOURCE,
 224                              WebURLRequest::RequestContextEventSource);
 225 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_FAVICON,
 226                              WebURLRequest::RequestContextFavicon);
 227 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_FETCH,
 228                              WebURLRequest::RequestContextFetch);
 229 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_FONT,
 230                              WebURLRequest::RequestContextFont);
 231 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_FORM,
 232                              WebURLRequest::RequestContextForm);
 233 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_FRAME,
 234                              WebURLRequest::RequestContextFrame);
 235 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_HYPERLINK,
 236                              WebURLRequest::RequestContextHyperlink);
 237 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_IFRAME,
 238                              WebURLRequest::RequestContextIframe);
 239 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_IMAGE,
 240                              WebURLRequest::RequestContextImage);
 241 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_IMAGE_SET,
 242                              WebURLRequest::RequestContextImageSet);
 243 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_IMPORT,
 244                              WebURLRequest::RequestContextImport);
 245 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_INTERNAL,
 246                              WebURLRequest::RequestContextInternal);
 247 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_LOCATION,
 248                              WebURLRequest::RequestContextLocation);
 249 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_MANIFEST,
 250                              WebURLRequest::RequestContextManifest);
 251 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_OBJECT,
 252                              WebURLRequest::RequestContextObject);
 253 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_PING,
 254                              WebURLRequest::RequestContextPing);
 255 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_PLUGIN,
 256                              WebURLRequest::RequestContextPlugin);
 257 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_PREFETCH,
 258                              WebURLRequest::RequestContextPrefetch);
 259 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_SCRIPT,
 260                              WebURLRequest::RequestContextScript);
 261 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_SERVICE_WORKER,
 262                              WebURLRequest::RequestContextServiceWorker);
 263 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_SHARED_WORKER,
 264                              WebURLRequest::RequestContextSharedWorker);
 265 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_SUBRESOURCE,
 266                              WebURLRequest::RequestContextSubresource);
 267 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_STYLE,
 268                              WebURLRequest::RequestContextStyle);
 269 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_TRACK,
 270                              WebURLRequest::RequestContextTrack);
 271 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_VIDEO,
 272                              WebURLRequest::RequestContextVideo);
 273 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_WORKER,
 274                              WebURLRequest::RequestContextWorker);
 275 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_XML_HTTP_REQUEST,
 276                              WebURLRequest::RequestContextXMLHttpRequest);
 277 STATIC_ASSERT_MATCHING_ENUMS(REQUEST_CONTEXT_TYPE_XSLT,
 278                              WebURLRequest::RequestContextXSLT);
 279
 280 RequestContextType GetRequestContextType(const WebURLRequest& request) {
 281   return static_cast<RequestContextType>(request.requestContext());
 282 }
 283
 284 }  // namespace
 285
 286 // WebURLLoaderImpl::Context --------------------------------------------------
 287
 288 // This inner class exists since the WebURLLoader may be deleted while inside a
 289 // call to WebURLLoaderClient.  Refcounting is to keep the context from being
 290 // deleted if it may have work to do after calling into the client.
 291 class WebURLLoaderImpl::Context : public base::RefCounted<Context>,
 292                                   public RequestPeer {
 293  public:
 294   Context(WebURLLoaderImpl* loader,
 295           ResourceDispatcher* resource_dispatcher,
 296           scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 297
 298   WebURLLoaderClient* client() const { return client_; }
 299   void set_client(WebURLLoaderClient* client) { client_ = client; }
 300
 301   void Cancel();
 302   void SetDefersLoading(bool value);
 303   void DidChangePriority(WebURLRequest::Priority new_priority,
 304                          int intra_priority_value);
 305   bool AttachThreadedDataReceiver(
 306       blink::WebThreadedDataReceiver* threaded_data_receiver);
 307   void Start(const WebURLRequest& request,
 308              SyncLoadResponse* sync_load_response);
 309
 310   // RequestPeer methods:
 311   void OnUploadProgress(uint64 position, uint64 size) override;
 312   bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
 313                           const ResourceResponseInfo& info) override;
 314   void OnReceivedResponse(const ResourceResponseInfo& info) override;
 315   void OnDownloadedData(int len, int encoded_data_length) override;
 316   void OnReceivedData(const char* data,
 317                       int data_length,
 318                       int encoded_data_length) override;
 319   void OnReceivedCachedMetadata(const char* data, int len) override;
 320   void OnCompletedRequest(int error_code,
 321                           bool was_ignored_by_handler,
 322                           bool stale_copy_in_cache,
 323                           const std::string& security_info,
 324                           const base::TimeTicks& completion_time,
 325                           int64 total_transfer_size) override;
 326
 327  private:
 328   friend class base::RefCounted<Context>;
 329   ~Context() override;
 330
 331   // We can optimize the handling of data URLs in most cases.
 332   bool CanHandleDataURLRequestLocally() const;
 333   void HandleDataURL();
 334   MojoResult WriteDataOnBodyStream(const char* data, size_t size);
 335   void OnHandleGotWritable(MojoResult);
 336
 337   WebURLLoaderImpl* loader_;
 338   WebURLRequest request_;
 339   WebURLLoaderClient* client_;
 340   ResourceDispatcher* resource_dispatcher_;
 341   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 342   WebReferrerPolicy referrer_policy_;
 343   scoped_ptr<FtpDirectoryListingResponseDelegate> ftp_listing_delegate_;
 344   scoped_ptr<MultipartResponseDelegate> multipart_delegate_;
 345   scoped_ptr<StreamOverrideParameters> stream_override_;
 346   mojo::ScopedDataPipeProducerHandle body_stream_writer_;
 347   mojo::common::HandleWatcher body_stream_writer_watcher_;
 348   // TODO(yhirano): Delete this buffer after implementing the back-pressure
 349   // mechanism.
 350   std::deque<char> body_stream_buffer_;
 351   bool got_all_stream_body_data_;
 352   enum DeferState {NOT_DEFERRING, SHOULD_DEFER, DEFERRED_DATA};
 353   DeferState defers_loading_;
 354   int request_id_;
 355 };
 356
 357 WebURLLoaderImpl::Context::Context(
 358     WebURLLoaderImpl* loader,
 359     ResourceDispatcher* resource_dispatcher,
 360     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
 361     : loader_(loader),
 362       client_(NULL),
 363       resource_dispatcher_(resource_dispatcher),
 364       task_runner_(task_runner),
 365       referrer_policy_(blink::WebReferrerPolicyDefault),
 366       got_all_stream_body_data_(false),
 367       defers_loading_(NOT_DEFERRING),
 368       request_id_(-1) {
 369 }
 370
 371 void WebURLLoaderImpl::Context::Cancel() {
 372   if (resource_dispatcher_ && // NULL in unittest.
 373       request_id_ != -1) {
 374     resource_dispatcher_->Cancel(request_id_);
 375     request_id_ = -1;
 376   }
 377
 378   // Ensure that we do not notify the multipart delegate anymore as it has
 379   // its own pointer to the client.
 380   if (multipart_delegate_)
 381     multipart_delegate_->Cancel();
 382   // Ditto for the ftp delegate.
 383   if (ftp_listing_delegate_)
 384     ftp_listing_delegate_->Cancel();
 385
 386   // Do not make any further calls to the client.
 387   client_ = NULL;
 388   loader_ = NULL;
 389 }
 390
 391 void WebURLLoaderImpl::Context::SetDefersLoading(bool value) {
 392   if (request_id_ != -1)
 393     resource_dispatcher_->SetDefersLoading(request_id_, value);
 394   if (value && defers_loading_ == NOT_DEFERRING) {
 395     defers_loading_ = SHOULD_DEFER;
 396   } else if (!value && defers_loading_ != NOT_DEFERRING) {
 397     if (defers_loading_ == DEFERRED_DATA) {
 398       task_runner_->PostTask(FROM_HERE,
 399                              base::Bind(&Context::HandleDataURL, this));
 400     }
 401     defers_loading_ = NOT_DEFERRING;
 402   }
 403 }
 404
 405 void WebURLLoaderImpl::Context::DidChangePriority(
 406     WebURLRequest::Priority new_priority, int intra_priority_value) {
 407   if (request_id_ != -1) {
 408     resource_dispatcher_->DidChangePriority(
 409         request_id_,
 410         ConvertWebKitPriorityToNetPriority(new_priority),
 411         intra_priority_value);
 412   }
 413 }
 414
 415 bool WebURLLoaderImpl::Context::AttachThreadedDataReceiver(
 416     blink::WebThreadedDataReceiver* threaded_data_receiver) {
 417   if (request_id_ != -1) {
 418     return resource_dispatcher_->AttachThreadedDataReceiver(
 419         request_id_, threaded_data_receiver);
 420   }
 421
 422   return false;
 423 }
 424
 425 void WebURLLoaderImpl::Context::Start(const WebURLRequest& request,
 426                                       SyncLoadResponse* sync_load_response) {
 427   DCHECK(request_id_ == -1);
 428   request_ = request;  // Save the request.
 429   if (request.extraData()) {
 430     RequestExtraData* extra_data =
 431         static_cast<RequestExtraData*>(request.extraData());
 432     stream_override_ = extra_data->TakeStreamOverrideOwnership();
 433   }
 434
 435   GURL url = request.url();
 436
 437   // PlzNavigate: during navigation, the renderer should request a stream which
 438   // contains the body of the response. The request has already been made by the
 439   // browser.
 440   if (stream_override_.get()) {
 441     CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 442         switches::kEnableBrowserSideNavigation));
 443     DCHECK(!sync_load_response);
 444     DCHECK_NE(WebURLRequest::FrameTypeNone, request.frameType());
 445     DCHECK_EQ("GET", request.httpMethod().latin1());
 446     url = stream_override_->stream_url;
 447   }
 448
 449   if (CanHandleDataURLRequestLocally()) {
 450     if (sync_load_response) {
 451       // This is a sync load. Do the work now.
 452       sync_load_response->url = url;
 453       sync_load_response->error_code =
 454           GetInfoFromDataURL(sync_load_response->url, sync_load_response,
 455                              &sync_load_response->data);
 456     } else {
 457       task_runner_->PostTask(FROM_HERE,
 458                              base::Bind(&Context::HandleDataURL, this));
 459     }
 460     return;
 461   }
 462
 463   // PlzNavigate: outside of tests, the only navigation requests going through
 464   // the WebURLLoader are the ones created by CommitNavigation. Several browser
 465   // tests load HTML directly through a data url which will be handled by the
 466   // block above.
 467   DCHECK_IMPLIES(base::CommandLine::ForCurrentProcess()->HasSwitch(
 468                      switches::kEnableBrowserSideNavigation),
 469                  stream_override_.get() ||
 470                      request.frameType() == WebURLRequest::FrameTypeNone);
 471
 472   GURL referrer_url(
 473       request.httpHeaderField(WebString::fromUTF8("Referer")).latin1());
 474   const std::string& method = request.httpMethod().latin1();
 475
 476   // TODO(brettw) this should take parameter encoding into account when
 477   // creating the GURLs.
 478
 479   // TODO(horo): Check credentials flag is unset when credentials mode is omit.
 480   //             Check credentials flag is set when credentials mode is include.
 481
 482   RequestInfo request_info;
 483   request_info.method = method;
 484   request_info.url = url;
 485   request_info.first_party_for_cookies = request.firstPartyForCookies();
 486   referrer_policy_ = request.referrerPolicy();
 487   request_info.referrer = Referrer(referrer_url, referrer_policy_);
 488   request_info.headers = GetWebURLRequestHeaders(request);
 489   request_info.load_flags = GetLoadFlagsForWebURLRequest(request);
 490   request_info.enable_load_timing = true;
 491   request_info.enable_upload_progress = request.reportUploadProgress();
 492   if (request.requestContext() == WebURLRequest::RequestContextXMLHttpRequest &&
 493       (url.has_username() || url.has_password())) {
 494     request_info.do_not_prompt_for_login = true;
 495   }
 496   // requestor_pid only needs to be non-zero if the request originates outside
 497   // the render process, so we can use requestorProcessID even for requests
 498   // from in-process plugins.
 499   request_info.requestor_pid = request.requestorProcessID();
 500   request_info.request_type = WebURLRequestToResourceType(request);
 501   request_info.priority =
 502       ConvertWebKitPriorityToNetPriority(request.priority());
 503   request_info.appcache_host_id = request.appCacheHostID();
 504   request_info.routing_id = request.requestorID();
 505   request_info.download_to_file = request.downloadToFile();
 506   request_info.has_user_gesture = request.hasUserGesture();
 507   request_info.skip_service_worker = request.skipServiceWorker();
 508   request_info.should_reset_appcache = request.shouldResetAppCache();
 509   request_info.fetch_request_mode = GetFetchRequestMode(request);
 510   request_info.fetch_credentials_mode = GetFetchCredentialsMode(request);
 511   request_info.fetch_request_context_type = GetRequestContextType(request);
 512   request_info.fetch_frame_type = GetRequestContextFrameType(request);
 513   request_info.extra_data = request.extraData();
 514
 515   scoped_refptr<ResourceRequestBody> request_body =
 516       GetRequestBodyForWebURLRequest(request).get();
 517
 518   if (sync_load_response) {
 519     resource_dispatcher_->StartSync(
 520         request_info, request_body.get(), sync_load_response);
 521     return;
 522   }
 523
 524   request_id_ = resource_dispatcher_->StartAsync(
 525       request_info, request_body.get(), this);
 526 }
 527
 528 void WebURLLoaderImpl::Context::OnUploadProgress(uint64 position, uint64 size) {
 529   if (client_)
 530     client_->didSendData(loader_, position, size);
 531 }
 532
 533 bool WebURLLoaderImpl::Context::OnReceivedRedirect(
 534     const net::RedirectInfo& redirect_info,
 535     const ResourceResponseInfo& info) {
 536   if (!client_)
 537     return false;
 538
 539   WebURLResponse response;
 540   response.initialize();
 541   PopulateURLResponse(request_.url(), info, &response);
 542
 543   // TODO(darin): We lack sufficient information to construct the actual
 544   // request that resulted from the redirect.
 545   WebURLRequest new_request(redirect_info.new_url);
 546   new_request.setFirstPartyForCookies(
 547       redirect_info.new_first_party_for_cookies);
 548   new_request.setDownloadToFile(request_.downloadToFile());
 549   new_request.setRequestContext(request_.requestContext());
 550   new_request.setFrameType(request_.frameType());
 551   new_request.setSkipServiceWorker(request_.skipServiceWorker());
 552   new_request.setShouldResetAppCache(request_.shouldResetAppCache());
 553   new_request.setFetchRequestMode(request_.fetchRequestMode());
 554   new_request.setFetchCredentialsMode(request_.fetchCredentialsMode());
 555
 556   new_request.setHTTPReferrer(WebString::fromUTF8(redirect_info.new_referrer),
 557                               referrer_policy_);
 558
 559   std::string old_method = request_.httpMethod().utf8();
 560   new_request.setHTTPMethod(WebString::fromUTF8(redirect_info.new_method));
 561   if (redirect_info.new_method == old_method)
 562     new_request.setHTTPBody(request_.httpBody());
 563
 564   // Protect from deletion during call to willSendRequest.
 565   scoped_refptr<Context> protect(this);
 566
 567   client_->willSendRequest(loader_, new_request, response);
 568   request_ = new_request;
 569
 570   // Only follow the redirect if WebKit left the URL unmodified.
 571   if (redirect_info.new_url == GURL(new_request.url())) {
 572     // First-party cookie logic moved from DocumentLoader in Blink to
 573     // net::URLRequest in the browser. Assert that Blink didn't try to change it
 574     // to something else.
 575     DCHECK_EQ(redirect_info.new_first_party_for_cookies.spec(),
 576               request_.firstPartyForCookies().string().utf8());
 577     return true;
 578   }
 579
 580   // We assume that WebKit only changes the URL to suppress a redirect, and we
 581   // assume that it does so by setting it to be invalid.
 582   DCHECK(!new_request.url().isValid());
 583   return false;
 584 }
 585
 586 void WebURLLoaderImpl::Context::OnReceivedResponse(
 587     const ResourceResponseInfo& initial_info) {
 588   if (!client_)
 589     return;
 590
 591   ResourceResponseInfo info = initial_info;
 592
 593   // PlzNavigate: during navigations, the ResourceResponse has already been
 594   // received on the browser side, and has been passed down to the renderer.
 595   if (stream_override_.get()) {
 596     CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 597         switches::kEnableBrowserSideNavigation));
 598     info = stream_override_->response;
 599   }
 600
 601   WebURLResponse response;
 602   response.initialize();
 603   PopulateURLResponse(request_.url(), info, &response);
 604
 605   bool show_raw_listing = (GURL(request_.url()).query() == "raw");
 606
 607   if (info.mime_type == "text/vnd.chromium.ftp-dir") {
 608     if (show_raw_listing) {
 609       // Set the MIME type to plain text to prevent any active content.
 610       response.setMIMEType("text/plain");
 611     } else {
 612       // We're going to produce a parsed listing in HTML.
 613       response.setMIMEType("text/html");
 614     }
 615   }
 616
 617   // Prevent |this| from being destroyed if the client destroys the loader,
 618   // ether in didReceiveResponse, or when the multipart/ftp delegate calls into
 619   // it.
 620   scoped_refptr<Context> protect(this);
 621
 622   if (request_.useStreamOnResponse()) {
 623     MojoCreateDataPipeOptions options;
 624     options.struct_size = sizeof(MojoCreateDataPipeOptions);
 625     options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
 626     options.element_num_bytes = 1;
 627     options.capacity_num_bytes = kBodyStreamPipeCapacity;
 628
 629     mojo::ScopedDataPipeConsumerHandle consumer;
 630     MojoResult result = mojo::CreateDataPipe(&options,
 631                                              &body_stream_writer_,
 632                                              &consumer);
 633     if (result != MOJO_RESULT_OK) {
 634       // TODO(yhirano): Handle the error.
 635       return;
 636     }
 637     client_->didReceiveResponse(
 638         loader_, response, new WebDataConsumerHandleImpl(consumer.Pass()));
 639   } else {
 640     client_->didReceiveResponse(loader_, response);
 641   }
 642
 643   // We may have been cancelled after didReceiveResponse, which would leave us
 644   // without a client and therefore without much need to do further handling.
 645   if (!client_)
 646     return;
 647
 648   DCHECK(!ftp_listing_delegate_.get());
 649   DCHECK(!multipart_delegate_.get());
 650   if (info.headers.get() && info.mime_type == "multipart/x-mixed-replace") {
 651     std::string content_type;
 652     info.headers->EnumerateHeader(NULL, "content-type", &content_type);
 653
 654     std::string mime_type;
 655     std::string charset;
 656     bool had_charset = false;
 657     std::string boundary;
 658     net::HttpUtil::ParseContentType(content_type, &mime_type, &charset,
 659                                     &had_charset, &boundary);
 660     base::TrimString(boundary, " \"", &boundary);
 661
 662     // If there's no boundary, just handle the request normally.  In the gecko
 663     // code, nsMultiMixedConv::OnStartRequest throws an exception.
 664     if (!boundary.empty()) {
 665       multipart_delegate_.reset(
 666           new MultipartResponseDelegate(client_, loader_, response, boundary));
 667     }
 668   } else if (info.mime_type == "text/vnd.chromium.ftp-dir" &&
 669              !show_raw_listing) {
 670     ftp_listing_delegate_.reset(
 671         new FtpDirectoryListingResponseDelegate(client_, loader_, response));
 672   }
 673 }
 674
 675 void WebURLLoaderImpl::Context::OnDownloadedData(int len,
 676                                                  int encoded_data_length) {
 677   if (client_)
 678     client_->didDownloadData(loader_, len, encoded_data_length);
 679 }
 680
 681 void WebURLLoaderImpl::Context::OnReceivedData(const char* data,
 682                                                int data_length,
 683                                                int encoded_data_length) {
 684   if (!client_)
 685     return;
 686
 687   if (request_.useStreamOnResponse()) {
 688     // We don't support ftp_listening_delegate_ and multipart_delegate_ for now.
 689     // TODO(yhirano): Support ftp listening and multipart.
 690     MojoResult rv = WriteDataOnBodyStream(data, data_length);
 691     if (rv != MOJO_RESULT_OK && client_) {
 692       client_->didFail(
 693           loader_, CreateWebURLError(request_.url(), false, net::ERR_FAILED));
 694     }
 695   } else if (ftp_listing_delegate_) {
 696     // The FTP listing delegate will make the appropriate calls to
 697     // client_->didReceiveData and client_->didReceiveResponse.  Since the
 698     // delegate may want to do work after sending data to the delegate, keep
 699     // |this| and the delegate alive until it's finished handling the data.
 700     scoped_refptr<Context> protect(this);
 701     ftp_listing_delegate_->OnReceivedData(data, data_length);
 702   } else if (multipart_delegate_) {
 703     // The multipart delegate will make the appropriate calls to
 704     // client_->didReceiveData and client_->didReceiveResponse.  Since the
 705     // delegate may want to do work after sending data to the delegate, keep
 706     // |this| and the delegate alive until it's finished handling the data.
 707     scoped_refptr<Context> protect(this);
 708     multipart_delegate_->OnReceivedData(data, data_length, encoded_data_length);
 709   } else {
 710     client_->didReceiveData(loader_, data, data_length, encoded_data_length);
 711   }
 712 }
 713
 714 void WebURLLoaderImpl::Context::OnReceivedCachedMetadata(
 715     const char* data, int len) {
 716   if (client_)
 717     client_->didReceiveCachedMetadata(loader_, data, len);
 718 }
 719
 720 void WebURLLoaderImpl::Context::OnCompletedRequest(
 721     int error_code,
 722     bool was_ignored_by_handler,
 723     bool stale_copy_in_cache,
 724     const std::string& security_info,
 725     const base::TimeTicks& completion_time,
 726     int64 total_transfer_size) {
 727   // The WebURLLoaderImpl may be deleted in any of the calls to the client or
 728   // the delegates below (As they also may call in to the client).  Keep |this|
 729   // alive in that case, to avoid a crash.  If that happens, the request will be
 730   // cancelled and |client_| will be set to NULL.
 731   scoped_refptr<Context> protect(this);
 732
 733   if (ftp_listing_delegate_) {
 734     ftp_listing_delegate_->OnCompletedRequest();
 735     ftp_listing_delegate_.reset(NULL);
 736   } else if (multipart_delegate_) {
 737     multipart_delegate_->OnCompletedRequest();
 738     multipart_delegate_.reset(NULL);
 739   }
 740
 741   if (client_) {
 742     if (error_code != net::OK) {
 743       client_->didFail(
 744           loader_,
 745           CreateWebURLError(request_.url(), stale_copy_in_cache, error_code));
 746     } else {
 747       if (request_.useStreamOnResponse()) {
 748         got_all_stream_body_data_ = true;
 749         if (body_stream_buffer_.empty()) {
 750           // Close the handle to notify the end of data.
 751           body_stream_writer_.reset();
 752           client_->didFinishLoading(
 753               loader_, (completion_time - TimeTicks()).InSecondsF(),
 754               total_transfer_size);
 755         }
 756       } else {
 757         client_->didFinishLoading(
 758             loader_, (completion_time - TimeTicks()).InSecondsF(),
 759             total_transfer_size);
 760       }
 761     }
 762   }
 763 }
 764
 765 WebURLLoaderImpl::Context::~Context() {
 766   if (request_id_ >= 0) {
 767     resource_dispatcher_->RemovePendingRequest(request_id_);
 768   }
 769 }
 770
 771 bool WebURLLoaderImpl::Context::CanHandleDataURLRequestLocally() const {
 772   GURL url = request_.url();
 773   if (!url.SchemeIs(url::kDataScheme))
 774     return false;
 775
 776   // The fast paths for data URL, Start() and HandleDataURL(), don't support
 777   // the downloadToFile option.
 778   if (request_.downloadToFile())
 779     return false;
 780
 781   // Data url requests from object tags may need to be intercepted as streams
 782   // and so need to be sent to the browser.
 783   if (request_.requestContext() == WebURLRequest::RequestContextObject)
 784     return false;
 785
 786   // Optimize for the case where we can handle a data URL locally.  We must
 787   // skip this for data URLs targetted at frames since those could trigger a
 788   // download.
 789   //
 790   // NOTE: We special case MIME types we can render both for performance
 791   // reasons as well as to support unit tests.
 792
 793 #if defined(OS_ANDROID)
 794   // For compatibility reasons on Android we need to expose top-level data://
 795   // to the browser.
 796   if (request_.frameType() == WebURLRequest::FrameTypeTopLevel)
 797     return false;
 798 #endif
 799
 800   if (request_.frameType() != WebURLRequest::FrameTypeTopLevel &&
 801       request_.frameType() != WebURLRequest::FrameTypeNested)
 802     return true;
 803
 804   std::string mime_type, unused_charset;
 805   if (net::DataURL::Parse(request_.url(), &mime_type, &unused_charset, NULL) &&
 806       mime_util::IsSupportedMimeType(mime_type))
 807     return true;
 808
 809   return false;
 810 }
 811
 812 void WebURLLoaderImpl::Context::HandleDataURL() {
 813   DCHECK_NE(defers_loading_, DEFERRED_DATA);
 814   if (defers_loading_ == SHOULD_DEFER) {
 815       defers_loading_ = DEFERRED_DATA;
 816       return;
 817   }
 818
 819   ResourceResponseInfo info;
 820   std::string data;
 821
 822   int error_code = GetInfoFromDataURL(request_.url(), &info, &data);
 823
 824   if (error_code == net::OK) {
 825     OnReceivedResponse(info);
 826     if (!data.empty())
 827       OnReceivedData(data.data(), data.size(), 0);
 828   }
 829
 830   OnCompletedRequest(error_code, false, false, info.security_info,
 831                      base::TimeTicks::Now(), 0);
 832 }
 833
 834 MojoResult WebURLLoaderImpl::Context::WriteDataOnBodyStream(const char* data,
 835                                                             size_t size) {
 836   if (body_stream_buffer_.empty() && size == 0) {
 837     // Nothing to do.
 838     return MOJO_RESULT_OK;
 839   }
 840
 841   if (!body_stream_writer_.is_valid()) {
 842     // The handle is already cleared.
 843     return MOJO_RESULT_OK;
 844   }
 845
 846   char* buffer = nullptr;
 847   uint32_t num_bytes_writable = 0;
 848   MojoResult rv = mojo::BeginWriteDataRaw(body_stream_writer_.get(),
 849                                           reinterpret_cast<void**>(&buffer),
 850                                           &num_bytes_writable,
 851                                           MOJO_WRITE_DATA_FLAG_NONE);
 852   if (rv == MOJO_RESULT_SHOULD_WAIT) {
 853     body_stream_buffer_.insert(body_stream_buffer_.end(), data, data + size);
 854     body_stream_writer_watcher_.Start(
 855         body_stream_writer_.get(),
 856         MOJO_HANDLE_SIGNAL_WRITABLE,
 857         MOJO_DEADLINE_INDEFINITE,
 858         base::Bind(&WebURLLoaderImpl::Context::OnHandleGotWritable,
 859                    base::Unretained(this)));
 860     return MOJO_RESULT_OK;
 861   }
 862
 863   if (rv != MOJO_RESULT_OK)
 864     return rv;
 865
 866   uint32_t num_bytes_to_write = 0;
 867   if (num_bytes_writable < body_stream_buffer_.size()) {
 868     auto begin = body_stream_buffer_.begin();
 869     auto end = body_stream_buffer_.begin() + num_bytes_writable;
 870
 871     std::copy(begin, end, buffer);
 872     num_bytes_to_write = num_bytes_writable;
 873     body_stream_buffer_.erase(begin, end);
 874     body_stream_buffer_.insert(body_stream_buffer_.end(), data, data + size);
 875   } else {
 876     std::copy(body_stream_buffer_.begin(), body_stream_buffer_.end(), buffer);
 877     num_bytes_writable -= body_stream_buffer_.size();
 878     num_bytes_to_write += body_stream_buffer_.size();
 879     buffer += body_stream_buffer_.size();
 880     body_stream_buffer_.clear();
 881
 882     size_t num_newbytes_to_write =
 883         std::min(size, static_cast<size_t>(num_bytes_writable));
 884     std::copy(data, data + num_newbytes_to_write, buffer);
 885     num_bytes_to_write += num_newbytes_to_write;
 886     body_stream_buffer_.insert(body_stream_buffer_.end(),
 887                                data + num_newbytes_to_write,
 888                                data + size);
 889   }
 890
 891   rv = mojo::EndWriteDataRaw(body_stream_writer_.get(), num_bytes_to_write);
 892   if (rv == MOJO_RESULT_OK && !body_stream_buffer_.empty()) {
 893     body_stream_writer_watcher_.Start(
 894         body_stream_writer_.get(),
 895         MOJO_HANDLE_SIGNAL_WRITABLE,
 896         MOJO_DEADLINE_INDEFINITE,
 897         base::Bind(&WebURLLoaderImpl::Context::OnHandleGotWritable,
 898                    base::Unretained(this)));
 899   }
 900   return rv;
 901 }
 902
 903 void WebURLLoaderImpl::Context::OnHandleGotWritable(MojoResult result) {
 904   if (result != MOJO_RESULT_OK) {
 905     if (client_) {
 906       client_->didFail(
 907           loader_, CreateWebURLError(request_.url(), false, net::ERR_FAILED));
 908       // |this| can be deleted here.
 909     }
 910     return;
 911   }
 912
 913   if (body_stream_buffer_.empty())
 914     return;
 915
 916   MojoResult rv = WriteDataOnBodyStream(nullptr, 0);
 917   if (rv == MOJO_RESULT_OK) {
 918     if (got_all_stream_body_data_ && body_stream_buffer_.empty()) {
 919       // Close the handle to notify the end of data.
 920       body_stream_writer_.reset();
 921       if (client_) {
 922         // TODO(yhirano): Pass appropriate arguments.
 923         client_->didFinishLoading(loader_, 0, 0);
 924         // |this| can be deleted here.
 925       }
 926     }
 927   } else {
 928     if (client_) {
 929       client_->didFail(
 930           loader_, CreateWebURLError(request_.url(), false, net::ERR_FAILED));
 931       // |this| can be deleted here.
 932     }
 933   }
 934 }
 935
 936 // WebURLLoaderImpl -----------------------------------------------------------
 937
 938 WebURLLoaderImpl::WebURLLoaderImpl(
 939     ResourceDispatcher* resource_dispatcher,
 940     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
 941     : context_(new Context(this, resource_dispatcher, task_runner)) {
 942 }
 943
 944 WebURLLoaderImpl::~WebURLLoaderImpl() {
 945   cancel();
 946 }
 947
 948 void WebURLLoaderImpl::PopulateURLResponse(const GURL& url,
 949                                            const ResourceResponseInfo& info,
 950                                            WebURLResponse* response) {
 951   response->setURL(url);
 952   response->setResponseTime(info.response_time.ToInternalValue());
 953   response->setMIMEType(WebString::fromUTF8(info.mime_type));
 954   response->setTextEncodingName(WebString::fromUTF8(info.charset));
 955   response->setExpectedContentLength(info.content_length);
 956   response->setSecurityInfo(info.security_info);
 957   response->setAppCacheID(info.appcache_id);
 958   response->setAppCacheManifestURL(info.appcache_manifest_url);
 959   response->setWasCached(!info.load_timing.request_start_time.is_null() &&
 960       info.response_time < info.load_timing.request_start_time);
 961   response->setRemoteIPAddress(
 962       WebString::fromUTF8(info.socket_address.host()));
 963   response->setRemotePort(info.socket_address.port());
 964   response->setConnectionID(info.load_timing.socket_log_id);
 965   response->setConnectionReused(info.load_timing.socket_reused);
 966   response->setDownloadFilePath(info.download_file_path.AsUTF16Unsafe());
 967   response->setWasFetchedViaSPDY(info.was_fetched_via_spdy);
 968   response->setWasFetchedViaServiceWorker(info.was_fetched_via_service_worker);
 969   response->setWasFallbackRequiredByServiceWorker(
 970       info.was_fallback_required_by_service_worker);
 971   response->setServiceWorkerResponseType(info.response_type_via_service_worker);
 972   response->setOriginalURLViaServiceWorker(
 973       info.original_url_via_service_worker);
 974
 975   WebURLResponseExtraDataImpl* extra_data =
 976       new WebURLResponseExtraDataImpl(info.npn_negotiated_protocol);
 977   response->setExtraData(extra_data);
 978   extra_data->set_was_fetched_via_spdy(info.was_fetched_via_spdy);
 979   extra_data->set_was_npn_negotiated(info.was_npn_negotiated);
 980   extra_data->set_was_alternate_protocol_available(
 981       info.was_alternate_protocol_available);
 982   extra_data->set_connection_info(info.connection_info);
 983   extra_data->set_was_fetched_via_proxy(info.was_fetched_via_proxy);
 984   extra_data->set_proxy_server(info.proxy_server);
 985
 986   // If there's no received headers end time, don't set load timing.  This is
 987   // the case for non-HTTP requests, requests that don't go over the wire, and
 988   // certain error cases.
 989   if (!info.load_timing.receive_headers_end.is_null()) {
 990     WebURLLoadTiming timing;
 991     PopulateURLLoadTiming(info.load_timing, &timing);
 992     const TimeTicks kNullTicks;
 993     timing.setServiceWorkerFetchStart(
 994         (info.service_worker_fetch_start - kNullTicks).InSecondsF());
 995     timing.setServiceWorkerFetchReady(
 996         (info.service_worker_fetch_ready - kNullTicks).InSecondsF());
 997     timing.setServiceWorkerFetchEnd(
 998         (info.service_worker_fetch_end - kNullTicks).InSecondsF());
 999     response->setLoadTiming(timing);
1000   }
1001
1002   if (info.devtools_info.get()) {
1003     WebHTTPLoadInfo load_info;
1004
1005     load_info.setHTTPStatusCode(info.devtools_info->http_status_code);
1006     load_info.setHTTPStatusText(WebString::fromLatin1(
1007         info.devtools_info->http_status_text));
1008     load_info.setEncodedDataLength(info.encoded_data_length);
1009
1010     load_info.setRequestHeadersText(WebString::fromLatin1(
1011         info.devtools_info->request_headers_text));
1012     load_info.setResponseHeadersText(WebString::fromLatin1(
1013         info.devtools_info->response_headers_text));
1014     const HeadersVector& request_headers = info.devtools_info->request_headers;
1015     for (HeadersVector::const_iterator it = request_headers.begin();
1016          it != request_headers.end(); ++it) {
1017       load_info.addRequestHeader(WebString::fromLatin1(it->first),
1018           WebString::fromLatin1(it->second));
1019     }
1020     const HeadersVector& response_headers =
1021         info.devtools_info->response_headers;
1022     for (HeadersVector::const_iterator it = response_headers.begin();
1023          it != response_headers.end(); ++it) {
1024       load_info.addResponseHeader(WebString::fromLatin1(it->first),
1025           WebString::fromLatin1(it->second));
1026     }
1027     load_info.setNPNNegotiatedProtocol(WebString::fromLatin1(
1028         info.npn_negotiated_protocol));
1029     response->setHTTPLoadInfo(load_info);
1030   }
1031
1032   const net::HttpResponseHeaders* headers = info.headers.get();
1033   if (!headers)
1034     return;
1035
1036   WebURLResponse::HTTPVersion version = WebURLResponse::Unknown;
1037   if (headers->GetHttpVersion() == net::HttpVersion(0, 9))
1038     version = WebURLResponse::HTTP_0_9;
1039   else if (headers->GetHttpVersion() == net::HttpVersion(1, 0))
1040     version = WebURLResponse::HTTP_1_0;
1041   else if (headers->GetHttpVersion() == net::HttpVersion(1, 1))
1042     version = WebURLResponse::HTTP_1_1;
1043   response->setHTTPVersion(version);
1044   response->setHTTPStatusCode(headers->response_code());
1045   response->setHTTPStatusText(WebString::fromLatin1(headers->GetStatusText()));
1046
1047   // TODO(darin): We should leverage HttpResponseHeaders for this, and this
1048   // should be using the same code as ResourceDispatcherHost.
1049   // TODO(jungshik): Figure out the actual value of the referrer charset and
1050   // pass it to GetSuggestedFilename.
1051   std::string value;
1052   headers->EnumerateHeader(NULL, "content-disposition", &value);
1053   response->setSuggestedFileName(
1054       net::GetSuggestedFilename(url,
1055                                 value,
1056                                 std::string(),  // referrer_charset
1057                                 std::string(),  // suggested_name
1058                                 std::string(),  // mime_type
1059                                 std::string()));  // default_name
1060
1061   Time time_val;
1062   if (headers->GetLastModifiedValue(&time_val))
1063     response->setLastModifiedDate(time_val.ToDoubleT());
1064
1065   // Build up the header map.
1066   void* iter = NULL;
1067   std::string name;
1068   while (headers->EnumerateHeaderLines(&iter, &name, &value)) {
1069     response->addHTTPHeaderField(WebString::fromLatin1(name),
1070                                  WebString::fromLatin1(value));
1071   }
1072 }
1073
1074 void WebURLLoaderImpl::loadSynchronously(const WebURLRequest& request,
1075                                          WebURLResponse& response,
1076                                          WebURLError& error,
1077                                          WebData& data) {
1078   SyncLoadResponse sync_load_response;
1079   context_->Start(request, &sync_load_response);
1080
1081   const GURL& final_url = sync_load_response.url;
1082
1083   // TODO(tc): For file loads, we may want to include a more descriptive
1084   // status code or status text.
1085   int error_code = sync_load_response.error_code;
1086   if (error_code != net::OK) {
1087     response.setURL(final_url);
1088     error.domain = WebString::fromUTF8(net::kErrorDomain);
1089     error.reason = error_code;
1090     error.unreachableURL = final_url;
1091     return;
1092   }
1093
1094   PopulateURLResponse(final_url, sync_load_response, &response);
1095
1096   data.assign(sync_load_response.data.data(),
1097               sync_load_response.data.size());
1098 }
1099
1100 void WebURLLoaderImpl::loadAsynchronously(const WebURLRequest& request,
1101                                           WebURLLoaderClient* client) {
1102   DCHECK(!context_->client());
1103
1104   context_->set_client(client);
1105   context_->Start(request, NULL);
1106 }
1107
1108 void WebURLLoaderImpl::cancel() {
1109   context_->Cancel();
1110 }
1111
1112 void WebURLLoaderImpl::setDefersLoading(bool value) {
1113   context_->SetDefersLoading(value);
1114 }
1115
1116 void WebURLLoaderImpl::didChangePriority(WebURLRequest::Priority new_priority,
1117                                          int intra_priority_value) {
1118   context_->DidChangePriority(new_priority, intra_priority_value);
1119 }
1120
1121 bool WebURLLoaderImpl::attachThreadedDataReceiver(
1122     blink::WebThreadedDataReceiver* threaded_data_receiver) {
1123   return context_->AttachThreadedDataReceiver(threaded_data_receiver);
1124 }
1125
1126 }  // namespace content