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 // An implementation of WebURLLoader in terms of ResourceLoaderBridge.
   6
   7 #include "content/child/web_url_loader_impl.h"
   8
   9 #include "base/bind.h"
  10 #include "base/files/file_path.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/time/time.h"
  15 #include "content/child/ftp_directory_listing_response_delegate.h"
  16 #include "content/child/multipart_response_delegate.h"
  17 #include "content/child/request_extra_data.h"
  18 #include "content/child/request_info.h"
  19 #include "content/child/resource_dispatcher.h"
  20 #include "content/child/sync_load_response.h"
  21 #include "content/child/web_url_request_util.h"
  22 #include "content/child/weburlresponse_extradata_impl.h"
  23 #include "content/common/resource_request_body.h"
  24 #include "content/public/child/request_peer.h"
  25 #include "net/base/data_url.h"
  26 #include "net/base/filename_util.h"
  27 #include "net/base/load_flags.h"
  28 #include "net/base/mime_util.h"
  29 #include "net/base/net_errors.h"
  30 #include "net/http/http_response_headers.h"
  31 #include "net/http/http_util.h"
  32 #include "net/url_request/redirect_info.h"
  33 #include "third_party/WebKit/public/platform/WebHTTPHeaderVisitor.h"
  34 #include "third_party/WebKit/public/platform/WebHTTPLoadInfo.h"
  35 #include "third_party/WebKit/public/platform/WebURL.h"
  36 #include "third_party/WebKit/public/platform/WebURLError.h"
  37 #include "third_party/WebKit/public/platform/WebURLLoadTiming.h"
  38 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  39 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  40 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  41 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
  42 #include "webkit/child/resource_loader_bridge.h"
  43
  44 using base::Time;
  45 using base::TimeTicks;
  46 using blink::WebData;
  47 using blink::WebHTTPBody;
  48 using blink::WebHTTPHeaderVisitor;
  49 using blink::WebHTTPLoadInfo;
  50 using blink::WebReferrerPolicy;
  51 using blink::WebSecurityPolicy;
  52 using blink::WebString;
  53 using blink::WebURL;
  54 using blink::WebURLError;
  55 using blink::WebURLLoadTiming;
  56 using blink::WebURLLoader;
  57 using blink::WebURLLoaderClient;
  58 using blink::WebURLRequest;
  59 using blink::WebURLResponse;
  60 using webkit_glue::ResourceLoaderBridge;
  61
  62 namespace content {
  63
  64 // Utilities ------------------------------------------------------------------
  65
  66 namespace {
  67
  68 const char kThrottledErrorDescription[] =
  69     "Request throttled. Visit http://dev.chromium.org/throttling for more "
  70     "information.";
  71
  72 class HeaderFlattener : public WebHTTPHeaderVisitor {
  73  public:
  74   HeaderFlattener() : has_accept_header_(false) {}
  75
  76   virtual void visitHeader(const WebString& name, const WebString& value) {
  77     // Headers are latin1.
  78     const std::string& name_latin1 = name.latin1();
  79     const std::string& value_latin1 = value.latin1();
  80
  81     // Skip over referrer headers found in the header map because we already
  82     // pulled it out as a separate parameter.
  83     if (LowerCaseEqualsASCII(name_latin1, "referer"))
  84       return;
  85
  86     if (LowerCaseEqualsASCII(name_latin1, "accept"))
  87       has_accept_header_ = true;
  88
  89     if (!buffer_.empty())
  90       buffer_.append("\r\n");
  91     buffer_.append(name_latin1 + ": " + value_latin1);
  92   }
  93
  94   const std::string& GetBuffer() {
  95     // In some cases, WebKit doesn't add an Accept header, but not having the
  96     // header confuses some web servers.  See bug 808613.
  97     if (!has_accept_header_) {
  98       if (!buffer_.empty())
  99         buffer_.append("\r\n");
 100       buffer_.append("Accept: */*");
 101       has_accept_header_ = true;
 102     }
 103     return buffer_;
 104   }
 105
 106  private:
 107   std::string buffer_;
 108   bool has_accept_header_;
 109 };
 110
 111 // Extracts the information from a data: url.
 112 bool GetInfoFromDataURL(const GURL& url,
 113                         ResourceResponseInfo* info,
 114                         std::string* data,
 115                         int* error_code) {
 116   std::string mime_type;
 117   std::string charset;
 118   if (net::DataURL::Parse(url, &mime_type, &charset, data)) {
 119     *error_code = net::OK;
 120     // Assure same time for all time fields of data: URLs.
 121     Time now = Time::Now();
 122     info->load_timing.request_start = TimeTicks::Now();
 123     info->load_timing.request_start_time = now;
 124     info->request_time = now;
 125     info->response_time = now;
 126     info->headers = NULL;
 127     info->mime_type.swap(mime_type);
 128     info->charset.swap(charset);
 129     info->security_info.clear();
 130     info->content_length = data->length();
 131     info->encoded_data_length = 0;
 132
 133     return true;
 134   }
 135
 136   *error_code = net::ERR_INVALID_URL;
 137   return false;
 138 }
 139
 140 typedef ResourceDevToolsInfo::HeadersVector HeadersVector;
 141
 142 // Converts timing data from |load_timing| to the format used by WebKit.
 143 void PopulateURLLoadTiming(const net::LoadTimingInfo& load_timing,
 144                            WebURLLoadTiming* url_timing) {
 145   DCHECK(!load_timing.request_start.is_null());
 146
 147   const TimeTicks kNullTicks;
 148   url_timing->initialize();
 149   url_timing->setRequestTime(
 150       (load_timing.request_start - kNullTicks).InSecondsF());
 151   url_timing->setProxyStart(
 152       (load_timing.proxy_resolve_start - kNullTicks).InSecondsF());
 153   url_timing->setProxyEnd(
 154       (load_timing.proxy_resolve_end - kNullTicks).InSecondsF());
 155   url_timing->setDNSStart(
 156       (load_timing.connect_timing.dns_start - kNullTicks).InSecondsF());
 157   url_timing->setDNSEnd(
 158       (load_timing.connect_timing.dns_end - kNullTicks).InSecondsF());
 159   url_timing->setConnectStart(
 160       (load_timing.connect_timing.connect_start - kNullTicks).InSecondsF());
 161   url_timing->setConnectEnd(
 162       (load_timing.connect_timing.connect_end - kNullTicks).InSecondsF());
 163   url_timing->setSSLStart(
 164       (load_timing.connect_timing.ssl_start - kNullTicks).InSecondsF());
 165   url_timing->setSSLEnd(
 166       (load_timing.connect_timing.ssl_end - kNullTicks).InSecondsF());
 167   url_timing->setSendStart(
 168       (load_timing.send_start - kNullTicks).InSecondsF());
 169   url_timing->setSendEnd(
 170       (load_timing.send_end - kNullTicks).InSecondsF());
 171   url_timing->setReceiveHeadersEnd(
 172       (load_timing.receive_headers_end - kNullTicks).InSecondsF());
 173 }
 174
 175 net::RequestPriority ConvertWebKitPriorityToNetPriority(
 176     const WebURLRequest::Priority& priority) {
 177   switch (priority) {
 178     case WebURLRequest::PriorityVeryHigh:
 179       return net::HIGHEST;
 180
 181     case WebURLRequest::PriorityHigh:
 182       return net::MEDIUM;
 183
 184     case WebURLRequest::PriorityMedium:
 185       return net::LOW;
 186
 187     case WebURLRequest::PriorityLow:
 188       return net::LOWEST;
 189
 190     case WebURLRequest::PriorityVeryLow:
 191       return net::IDLE;
 192
 193     case WebURLRequest::PriorityUnresolved:
 194     default:
 195       NOTREACHED();
 196       return net::LOW;
 197   }
 198 }
 199
 200 }  // namespace
 201
 202 // WebURLLoaderImpl::Context --------------------------------------------------
 203
 204 // This inner class exists since the WebURLLoader may be deleted while inside a
 205 // call to WebURLLoaderClient.  Refcounting is to keep the context from being
 206 // deleted if it may have work to do after calling into the client.
 207 class WebURLLoaderImpl::Context : public base::RefCounted<Context>,
 208                                   public RequestPeer {
 209  public:
 210   Context(WebURLLoaderImpl* loader, ResourceDispatcher* resource_dispatcher);
 211
 212   WebURLLoaderClient* client() const { return client_; }
 213   void set_client(WebURLLoaderClient* client) { client_ = client; }
 214
 215   void Cancel();
 216   void SetDefersLoading(bool value);
 217   void DidChangePriority(WebURLRequest::Priority new_priority,
 218                          int intra_priority_value);
 219   bool AttachThreadedDataReceiver(
 220       blink::WebThreadedDataReceiver* threaded_data_receiver);
 221   void Start(const WebURLRequest& request,
 222              SyncLoadResponse* sync_load_response);
 223
 224   // RequestPeer methods:
 225   virtual void OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
 226   virtual bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
 227                                   const ResourceResponseInfo& info) OVERRIDE;
 228   virtual void OnReceivedResponse(const ResourceResponseInfo& info) OVERRIDE;
 229   virtual void OnDownloadedData(int len, int encoded_data_length) OVERRIDE;
 230   virtual void OnReceivedData(const char* data,
 231                               int data_length,
 232                               int encoded_data_length) OVERRIDE;
 233   virtual void OnReceivedCachedMetadata(const char* data, int len) OVERRIDE;
 234   virtual void OnCompletedRequest(
 235       int error_code,
 236       bool was_ignored_by_handler,
 237       bool stale_copy_in_cache,
 238       const std::string& security_info,
 239       const base::TimeTicks& completion_time,
 240       int64 total_transfer_size) OVERRIDE;
 241
 242  private:
 243   friend class base::RefCounted<Context>;
 244   virtual ~Context() {}
 245
 246   // We can optimize the handling of data URLs in most cases.
 247   bool CanHandleDataURL(const GURL& url) const;
 248   void HandleDataURL();
 249
 250   WebURLLoaderImpl* loader_;
 251   WebURLRequest request_;
 252   WebURLLoaderClient* client_;
 253   ResourceDispatcher* resource_dispatcher_;
 254   WebReferrerPolicy referrer_policy_;
 255   scoped_ptr<ResourceLoaderBridge> bridge_;
 256   scoped_ptr<FtpDirectoryListingResponseDelegate> ftp_listing_delegate_;
 257   scoped_ptr<MultipartResponseDelegate> multipart_delegate_;
 258   scoped_ptr<ResourceLoaderBridge> completed_bridge_;
 259 };
 260
 261 WebURLLoaderImpl::Context::Context(WebURLLoaderImpl* loader,
 262                                    ResourceDispatcher* resource_dispatcher)
 263     : loader_(loader),
 264       client_(NULL),
 265       resource_dispatcher_(resource_dispatcher),
 266       referrer_policy_(blink::WebReferrerPolicyDefault) {
 267 }
 268
 269 void WebURLLoaderImpl::Context::Cancel() {
 270   if (bridge_) {
 271     bridge_->Cancel();
 272     bridge_.reset();
 273   }
 274
 275   // Ensure that we do not notify the multipart delegate anymore as it has
 276   // its own pointer to the client.
 277   if (multipart_delegate_)
 278     multipart_delegate_->Cancel();
 279   // Ditto for the ftp delegate.
 280   if (ftp_listing_delegate_)
 281     ftp_listing_delegate_->Cancel();
 282
 283   // Do not make any further calls to the client.
 284   client_ = NULL;
 285   loader_ = NULL;
 286 }
 287
 288 void WebURLLoaderImpl::Context::SetDefersLoading(bool value) {
 289   if (bridge_)
 290     bridge_->SetDefersLoading(value);
 291 }
 292
 293 void WebURLLoaderImpl::Context::DidChangePriority(
 294     WebURLRequest::Priority new_priority, int intra_priority_value) {
 295   if (bridge_)
 296     bridge_->DidChangePriority(
 297         ConvertWebKitPriorityToNetPriority(new_priority), intra_priority_value);
 298 }
 299
 300 bool WebURLLoaderImpl::Context::AttachThreadedDataReceiver(
 301     blink::WebThreadedDataReceiver* threaded_data_receiver) {
 302   if (bridge_)
 303     return bridge_->AttachThreadedDataReceiver(threaded_data_receiver);
 304
 305   return false;
 306 }
 307
 308 void WebURLLoaderImpl::Context::Start(const WebURLRequest& request,
 309                                       SyncLoadResponse* sync_load_response) {
 310   DCHECK(!bridge_.get());
 311
 312   request_ = request;  // Save the request.
 313
 314   GURL url = request.url();
 315   if (url.SchemeIs("data") && CanHandleDataURL(url)) {
 316     if (sync_load_response) {
 317       // This is a sync load. Do the work now.
 318       sync_load_response->url = url;
 319       std::string data;
 320       GetInfoFromDataURL(sync_load_response->url, sync_load_response,
 321                          &sync_load_response->data,
 322                          &sync_load_response->error_code);
 323     } else {
 324       base::MessageLoop::current()->PostTask(
 325           FROM_HERE, base::Bind(&Context::HandleDataURL, this));
 326     }
 327     return;
 328   }
 329
 330   GURL referrer_url(
 331       request.httpHeaderField(WebString::fromUTF8("Referer")).latin1());
 332   const std::string& method = request.httpMethod().latin1();
 333
 334   int load_flags = net::LOAD_NORMAL;
 335   switch (request.cachePolicy()) {
 336     case WebURLRequest::ReloadIgnoringCacheData:
 337       // Required by LayoutTests/http/tests/misc/refresh-headers.php
 338       load_flags |= net::LOAD_VALIDATE_CACHE;
 339       break;
 340     case WebURLRequest::ReloadBypassingCache:
 341       load_flags |= net::LOAD_BYPASS_CACHE;
 342       break;
 343     case WebURLRequest::ReturnCacheDataElseLoad:
 344       load_flags |= net::LOAD_PREFERRING_CACHE;
 345       break;
 346     case WebURLRequest::ReturnCacheDataDontLoad:
 347       load_flags |= net::LOAD_ONLY_FROM_CACHE;
 348       break;
 349     case WebURLRequest::UseProtocolCachePolicy:
 350       break;
 351     default:
 352       NOTREACHED();
 353   }
 354
 355   if (request.reportUploadProgress())
 356     load_flags |= net::LOAD_ENABLE_UPLOAD_PROGRESS;
 357   if (request.reportRawHeaders())
 358     load_flags |= net::LOAD_REPORT_RAW_HEADERS;
 359
 360   if (!request.allowStoredCredentials()) {
 361     load_flags |= net::LOAD_DO_NOT_SAVE_COOKIES;
 362     load_flags |= net::LOAD_DO_NOT_SEND_COOKIES;
 363   }
 364
 365   if (!request.allowStoredCredentials())
 366     load_flags |= net::LOAD_DO_NOT_SEND_AUTH_DATA;
 367
 368   if (request.requestContext() == WebURLRequest::RequestContextXMLHttpRequest &&
 369       (url.has_username() || url.has_password())) {
 370     load_flags |= net::LOAD_DO_NOT_PROMPT_FOR_LOGIN;
 371   }
 372
 373   HeaderFlattener flattener;
 374   request.visitHTTPHeaderFields(&flattener);
 375
 376   // TODO(brettw) this should take parameter encoding into account when
 377   // creating the GURLs.
 378
 379   RequestInfo request_info;
 380   request_info.method = method;
 381   request_info.url = url;
 382   request_info.first_party_for_cookies = request.firstPartyForCookies();
 383   request_info.referrer = referrer_url;
 384   request_info.headers = flattener.GetBuffer();
 385   request_info.load_flags = load_flags;
 386   request_info.enable_load_timing = true;
 387   // requestor_pid only needs to be non-zero if the request originates outside
 388   // the render process, so we can use requestorProcessID even for requests
 389   // from in-process plugins.
 390   request_info.requestor_pid = request.requestorProcessID();
 391   request_info.request_type = WebURLRequestToResourceType(request);
 392   request_info.priority =
 393       ConvertWebKitPriorityToNetPriority(request.priority());
 394   request_info.appcache_host_id = request.appCacheHostID();
 395   request_info.routing_id = request.requestorID();
 396   request_info.download_to_file = request.downloadToFile();
 397   request_info.has_user_gesture = request.hasUserGesture();
 398   request_info.extra_data = request.extraData();
 399   referrer_policy_ = request.referrerPolicy();
 400   request_info.referrer_policy = request.referrerPolicy();
 401   bridge_.reset(resource_dispatcher_->CreateBridge(request_info));
 402
 403   if (!request.httpBody().isNull()) {
 404     // GET and HEAD requests shouldn't have http bodies.
 405     DCHECK(method != "GET" && method != "HEAD");
 406     const WebHTTPBody& httpBody = request.httpBody();
 407     size_t i = 0;
 408     WebHTTPBody::Element element;
 409     scoped_refptr<ResourceRequestBody> request_body = new ResourceRequestBody;
 410     while (httpBody.elementAt(i++, element)) {
 411       switch (element.type) {
 412         case WebHTTPBody::Element::TypeData:
 413           if (!element.data.isEmpty()) {
 414             // WebKit sometimes gives up empty data to append. These aren't
 415             // necessary so we just optimize those out here.
 416             request_body->AppendBytes(
 417                 element.data.data(), static_cast<int>(element.data.size()));
 418           }
 419           break;
 420         case WebHTTPBody::Element::TypeFile:
 421           if (element.fileLength == -1) {
 422             request_body->AppendFileRange(
 423                 base::FilePath::FromUTF16Unsafe(element.filePath),
 424                 0, kuint64max, base::Time());
 425           } else {
 426             request_body->AppendFileRange(
 427                 base::FilePath::FromUTF16Unsafe(element.filePath),
 428                 static_cast<uint64>(element.fileStart),
 429                 static_cast<uint64>(element.fileLength),
 430                 base::Time::FromDoubleT(element.modificationTime));
 431           }
 432           break;
 433         case WebHTTPBody::Element::TypeFileSystemURL: {
 434           GURL file_system_url = element.fileSystemURL;
 435           DCHECK(file_system_url.SchemeIsFileSystem());
 436           request_body->AppendFileSystemFileRange(
 437               file_system_url,
 438               static_cast<uint64>(element.fileStart),
 439               static_cast<uint64>(element.fileLength),
 440               base::Time::FromDoubleT(element.modificationTime));
 441           break;
 442         }
 443         case WebHTTPBody::Element::TypeBlob:
 444           request_body->AppendBlob(element.blobUUID.utf8());
 445           break;
 446         default:
 447           NOTREACHED();
 448       }
 449     }
 450     request_body->set_identifier(request.httpBody().identifier());
 451     bridge_->SetRequestBody(request_body.get());
 452   }
 453
 454   if (sync_load_response) {
 455     bridge_->SyncLoad(sync_load_response);
 456     return;
 457   }
 458
 459   // TODO(mmenke):  This case probably never happens, anyways.  Probably should
 460   // not handle this case at all.  If it's worth handling, this code currently
 461   // results in the request just hanging, which should be fixed.
 462   if (!bridge_->Start(this))
 463     bridge_.reset();
 464 }
 465
 466 void WebURLLoaderImpl::Context::OnUploadProgress(uint64 position, uint64 size) {
 467   if (client_)
 468     client_->didSendData(loader_, position, size);
 469 }
 470
 471 bool WebURLLoaderImpl::Context::OnReceivedRedirect(
 472     const net::RedirectInfo& redirect_info,
 473     const ResourceResponseInfo& info) {
 474   if (!client_)
 475     return false;
 476
 477   WebURLResponse response;
 478   response.initialize();
 479   PopulateURLResponse(request_.url(), info, &response);
 480
 481   // TODO(darin): We lack sufficient information to construct the actual
 482   // request that resulted from the redirect.
 483   WebURLRequest new_request(redirect_info.new_url);
 484   new_request.setFirstPartyForCookies(
 485       redirect_info.new_first_party_for_cookies);
 486   new_request.setDownloadToFile(request_.downloadToFile());
 487
 488   new_request.setHTTPReferrer(WebString::fromUTF8(redirect_info.new_referrer),
 489                               referrer_policy_);
 490
 491   std::string old_method = request_.httpMethod().utf8();
 492   new_request.setHTTPMethod(WebString::fromUTF8(redirect_info.new_method));
 493   if (redirect_info.new_method == old_method)
 494     new_request.setHTTPBody(request_.httpBody());
 495
 496   // Protect from deletion during call to willSendRequest.
 497   scoped_refptr<Context> protect(this);
 498
 499   client_->willSendRequest(loader_, new_request, response);
 500   request_ = new_request;
 501
 502   // Only follow the redirect if WebKit left the URL unmodified.
 503   if (redirect_info.new_url == GURL(new_request.url())) {
 504     // First-party cookie logic moved from DocumentLoader in Blink to
 505     // net::URLRequest in the browser. Assert that Blink didn't try to change it
 506     // to something else.
 507     DCHECK_EQ(redirect_info.new_first_party_for_cookies.spec(),
 508               request_.firstPartyForCookies().string().utf8());
 509     return true;
 510   }
 511
 512   // We assume that WebKit only changes the URL to suppress a redirect, and we
 513   // assume that it does so by setting it to be invalid.
 514   DCHECK(!new_request.url().isValid());
 515   return false;
 516 }
 517
 518 void WebURLLoaderImpl::Context::OnReceivedResponse(
 519     const ResourceResponseInfo& info) {
 520   if (!client_)
 521     return;
 522
 523   WebURLResponse response;
 524   response.initialize();
 525   // Updates the request url if the response was fetched by a ServiceWorker,
 526   // and it was not generated inside the ServiceWorker.
 527   if (info.was_fetched_via_service_worker &&
 528       !info.original_url_via_service_worker.is_empty()) {
 529     request_.setURL(info.original_url_via_service_worker);
 530   }
 531   PopulateURLResponse(request_.url(), info, &response);
 532
 533   bool show_raw_listing = (GURL(request_.url()).query() == "raw");
 534
 535   if (info.mime_type == "text/vnd.chromium.ftp-dir") {
 536     if (show_raw_listing) {
 537       // Set the MIME type to plain text to prevent any active content.
 538       response.setMIMEType("text/plain");
 539     } else {
 540       // We're going to produce a parsed listing in HTML.
 541       response.setMIMEType("text/html");
 542     }
 543   }
 544
 545   // Prevent |this| from being destroyed if the client destroys the loader,
 546   // ether in didReceiveResponse, or when the multipart/ftp delegate calls into
 547   // it.
 548   scoped_refptr<Context> protect(this);
 549   client_->didReceiveResponse(loader_, response);
 550
 551   // We may have been cancelled after didReceiveResponse, which would leave us
 552   // without a client and therefore without much need to do further handling.
 553   if (!client_)
 554     return;
 555
 556   DCHECK(!ftp_listing_delegate_.get());
 557   DCHECK(!multipart_delegate_.get());
 558   if (info.headers.get() && info.mime_type == "multipart/x-mixed-replace") {
 559     std::string content_type;
 560     info.headers->EnumerateHeader(NULL, "content-type", &content_type);
 561
 562     std::string mime_type;
 563     std::string charset;
 564     bool had_charset = false;
 565     std::string boundary;
 566     net::HttpUtil::ParseContentType(content_type, &mime_type, &charset,
 567                                     &had_charset, &boundary);
 568     base::TrimString(boundary, " \"", &boundary);
 569
 570     // If there's no boundary, just handle the request normally.  In the gecko
 571     // code, nsMultiMixedConv::OnStartRequest throws an exception.
 572     if (!boundary.empty()) {
 573       multipart_delegate_.reset(
 574           new MultipartResponseDelegate(client_, loader_, response, boundary));
 575     }
 576   } else if (info.mime_type == "text/vnd.chromium.ftp-dir" &&
 577              !show_raw_listing) {
 578     ftp_listing_delegate_.reset(
 579         new FtpDirectoryListingResponseDelegate(client_, loader_, response));
 580   }
 581 }
 582
 583 void WebURLLoaderImpl::Context::OnDownloadedData(int len,
 584                                                  int encoded_data_length) {
 585   if (client_)
 586     client_->didDownloadData(loader_, len, encoded_data_length);
 587 }
 588
 589 void WebURLLoaderImpl::Context::OnReceivedData(const char* data,
 590                                                int data_length,
 591                                                int encoded_data_length) {
 592   if (!client_)
 593     return;
 594
 595   if (ftp_listing_delegate_) {
 596     // The FTP listing delegate will make the appropriate calls to
 597     // client_->didReceiveData and client_->didReceiveResponse.  Since the
 598     // delegate may want to do work after sending data to the delegate, keep
 599     // |this| and the delegate alive until it's finished handling the data.
 600     scoped_refptr<Context> protect(this);
 601     ftp_listing_delegate_->OnReceivedData(data, data_length);
 602   } else if (multipart_delegate_) {
 603     // The multipart delegate will make the appropriate calls to
 604     // client_->didReceiveData and client_->didReceiveResponse.  Since the
 605     // delegate may want to do work after sending data to the delegate, keep
 606     // |this| and the delegate alive until it's finished handling the data.
 607     scoped_refptr<Context> protect(this);
 608     multipart_delegate_->OnReceivedData(data, data_length, encoded_data_length);
 609   } else {
 610     client_->didReceiveData(loader_, data, data_length, encoded_data_length);
 611   }
 612 }
 613
 614 void WebURLLoaderImpl::Context::OnReceivedCachedMetadata(
 615     const char* data, int len) {
 616   if (client_)
 617     client_->didReceiveCachedMetadata(loader_, data, len);
 618 }
 619
 620 void WebURLLoaderImpl::Context::OnCompletedRequest(
 621     int error_code,
 622     bool was_ignored_by_handler,
 623     bool stale_copy_in_cache,
 624     const std::string& security_info,
 625     const base::TimeTicks& completion_time,
 626     int64 total_transfer_size) {
 627   // The WebURLLoaderImpl may be deleted in any of the calls to the client or
 628   // the delegates below (As they also may call in to the client).  Keep |this|
 629   // alive in that case, to avoid a crash.  If that happens, the request will be
 630   // cancelled and |client_| will be set to NULL.
 631   scoped_refptr<Context> protect(this);
 632
 633   if (ftp_listing_delegate_) {
 634     ftp_listing_delegate_->OnCompletedRequest();
 635     ftp_listing_delegate_.reset(NULL);
 636   } else if (multipart_delegate_) {
 637     multipart_delegate_->OnCompletedRequest();
 638     multipart_delegate_.reset(NULL);
 639   }
 640
 641   // Prevent any further IPC to the browser now that we're complete, but
 642   // don't delete it to keep any downloaded temp files alive.
 643   DCHECK(!completed_bridge_.get());
 644   completed_bridge_.swap(bridge_);
 645
 646   if (client_) {
 647     if (error_code != net::OK) {
 648       client_->didFail(loader_, CreateError(request_.url(),
 649                                             stale_copy_in_cache,
 650                                             error_code));
 651     } else {
 652       client_->didFinishLoading(
 653           loader_, (completion_time - TimeTicks()).InSecondsF(),
 654           total_transfer_size);
 655     }
 656   }
 657 }
 658
 659 bool WebURLLoaderImpl::Context::CanHandleDataURL(const GURL& url) const {
 660   DCHECK(url.SchemeIs("data"));
 661
 662   // Optimize for the case where we can handle a data URL locally.  We must
 663   // skip this for data URLs targetted at frames since those could trigger a
 664   // download.
 665   //
 666   // NOTE: We special case MIME types we can render both for performance
 667   // reasons as well as to support unit tests, which do not have an underlying
 668   // ResourceLoaderBridge implementation.
 669
 670 #if defined(OS_ANDROID)
 671   // For compatibility reasons on Android we need to expose top-level data://
 672   // to the browser.
 673   if (request_.frameType() == WebURLRequest::FrameTypeTopLevel)
 674     return false;
 675 #endif
 676
 677   if (request_.frameType() != WebURLRequest::FrameTypeTopLevel &&
 678       request_.frameType() != WebURLRequest::FrameTypeNested)
 679     return true;
 680
 681   std::string mime_type, unused_charset;
 682   if (net::DataURL::Parse(url, &mime_type, &unused_charset, NULL) &&
 683       net::IsSupportedMimeType(mime_type))
 684     return true;
 685
 686   return false;
 687 }
 688
 689 void WebURLLoaderImpl::Context::HandleDataURL() {
 690   ResourceResponseInfo info;
 691   int error_code;
 692   std::string data;
 693
 694   if (GetInfoFromDataURL(request_.url(), &info, &data, &error_code)) {
 695     OnReceivedResponse(info);
 696     if (!data.empty())
 697       OnReceivedData(data.data(), data.size(), 0);
 698   }
 699
 700   OnCompletedRequest(error_code, false, false, info.security_info,
 701                      base::TimeTicks::Now(), 0);
 702 }
 703
 704 // WebURLLoaderImpl -----------------------------------------------------------
 705
 706 WebURLLoaderImpl::WebURLLoaderImpl(ResourceDispatcher* resource_dispatcher)
 707     : context_(new Context(this, resource_dispatcher)) {
 708 }
 709
 710 WebURLLoaderImpl::~WebURLLoaderImpl() {
 711   cancel();
 712 }
 713
 714 WebURLError WebURLLoaderImpl::CreateError(const WebURL& unreachable_url,
 715                                           bool stale_copy_in_cache,
 716                                           int reason) {
 717   WebURLError error;
 718   error.domain = WebString::fromUTF8(net::kErrorDomain);
 719   error.reason = reason;
 720   error.unreachableURL = unreachable_url;
 721   error.staleCopyInCache = stale_copy_in_cache;
 722   if (reason == net::ERR_ABORTED) {
 723     error.isCancellation = true;
 724   } else if (reason == net::ERR_TEMPORARILY_THROTTLED) {
 725     error.localizedDescription = WebString::fromUTF8(
 726         kThrottledErrorDescription);
 727   } else {
 728     error.localizedDescription = WebString::fromUTF8(
 729         net::ErrorToString(reason));
 730   }
 731   return error;
 732 }
 733
 734 void WebURLLoaderImpl::PopulateURLResponse(const GURL& url,
 735                                            const ResourceResponseInfo& info,
 736                                            WebURLResponse* response) {
 737   response->setURL(url);
 738   response->setResponseTime(info.response_time.ToDoubleT());
 739   response->setMIMEType(WebString::fromUTF8(info.mime_type));
 740   response->setTextEncodingName(WebString::fromUTF8(info.charset));
 741   response->setExpectedContentLength(info.content_length);
 742   response->setSecurityInfo(info.security_info);
 743   response->setAppCacheID(info.appcache_id);
 744   response->setAppCacheManifestURL(info.appcache_manifest_url);
 745   response->setWasCached(!info.load_timing.request_start_time.is_null() &&
 746       info.response_time < info.load_timing.request_start_time);
 747   response->setRemoteIPAddress(
 748       WebString::fromUTF8(info.socket_address.host()));
 749   response->setRemotePort(info.socket_address.port());
 750   response->setConnectionID(info.load_timing.socket_log_id);
 751   response->setConnectionReused(info.load_timing.socket_reused);
 752   response->setDownloadFilePath(info.download_file_path.AsUTF16Unsafe());
 753   response->setWasFetchedViaServiceWorker(info.was_fetched_via_service_worker);
 754   WebURLResponseExtraDataImpl* extra_data =
 755       new WebURLResponseExtraDataImpl(info.npn_negotiated_protocol);
 756   response->setExtraData(extra_data);
 757   extra_data->set_was_fetched_via_spdy(info.was_fetched_via_spdy);
 758   extra_data->set_was_npn_negotiated(info.was_npn_negotiated);
 759   extra_data->set_was_alternate_protocol_available(
 760       info.was_alternate_protocol_available);
 761   extra_data->set_connection_info(info.connection_info);
 762   extra_data->set_was_fetched_via_proxy(info.was_fetched_via_proxy);
 763
 764   // If there's no received headers end time, don't set load timing.  This is
 765   // the case for non-HTTP requests, requests that don't go over the wire, and
 766   // certain error cases.
 767   if (!info.load_timing.receive_headers_end.is_null()) {
 768     WebURLLoadTiming timing;
 769     PopulateURLLoadTiming(info.load_timing, &timing);
 770     response->setLoadTiming(timing);
 771   }
 772
 773   if (info.devtools_info.get()) {
 774     WebHTTPLoadInfo load_info;
 775
 776     load_info.setHTTPStatusCode(info.devtools_info->http_status_code);
 777     load_info.setHTTPStatusText(WebString::fromLatin1(
 778         info.devtools_info->http_status_text));
 779     load_info.setEncodedDataLength(info.encoded_data_length);
 780
 781     load_info.setRequestHeadersText(WebString::fromLatin1(
 782         info.devtools_info->request_headers_text));
 783     load_info.setResponseHeadersText(WebString::fromLatin1(
 784         info.devtools_info->response_headers_text));
 785     const HeadersVector& request_headers = info.devtools_info->request_headers;
 786     for (HeadersVector::const_iterator it = request_headers.begin();
 787          it != request_headers.end(); ++it) {
 788       load_info.addRequestHeader(WebString::fromLatin1(it->first),
 789           WebString::fromLatin1(it->second));
 790     }
 791     const HeadersVector& response_headers =
 792         info.devtools_info->response_headers;
 793     for (HeadersVector::const_iterator it = response_headers.begin();
 794          it != response_headers.end(); ++it) {
 795       load_info.addResponseHeader(WebString::fromLatin1(it->first),
 796           WebString::fromLatin1(it->second));
 797     }
 798     response->setHTTPLoadInfo(load_info);
 799   }
 800
 801   const net::HttpResponseHeaders* headers = info.headers.get();
 802   if (!headers)
 803     return;
 804
 805   WebURLResponse::HTTPVersion version = WebURLResponse::Unknown;
 806   if (headers->GetHttpVersion() == net::HttpVersion(0, 9))
 807     version = WebURLResponse::HTTP_0_9;
 808   else if (headers->GetHttpVersion() == net::HttpVersion(1, 0))
 809     version = WebURLResponse::HTTP_1_0;
 810   else if (headers->GetHttpVersion() == net::HttpVersion(1, 1))
 811     version = WebURLResponse::HTTP_1_1;
 812   response->setHTTPVersion(version);
 813   response->setHTTPStatusCode(headers->response_code());
 814   response->setHTTPStatusText(WebString::fromLatin1(headers->GetStatusText()));
 815
 816   // TODO(darin): We should leverage HttpResponseHeaders for this, and this
 817   // should be using the same code as ResourceDispatcherHost.
 818   // TODO(jungshik): Figure out the actual value of the referrer charset and
 819   // pass it to GetSuggestedFilename.
 820   std::string value;
 821   headers->EnumerateHeader(NULL, "content-disposition", &value);
 822   response->setSuggestedFileName(
 823       net::GetSuggestedFilename(url,
 824                                 value,
 825                                 std::string(),  // referrer_charset
 826                                 std::string(),  // suggested_name
 827                                 std::string(),  // mime_type
 828                                 std::string()));  // default_name
 829
 830   Time time_val;
 831   if (headers->GetLastModifiedValue(&time_val))
 832     response->setLastModifiedDate(time_val.ToDoubleT());
 833
 834   // Build up the header map.
 835   void* iter = NULL;
 836   std::string name;
 837   while (headers->EnumerateHeaderLines(&iter, &name, &value)) {
 838     response->addHTTPHeaderField(WebString::fromLatin1(name),
 839                                  WebString::fromLatin1(value));
 840   }
 841 }
 842
 843 void WebURLLoaderImpl::loadSynchronously(const WebURLRequest& request,
 844                                          WebURLResponse& response,
 845                                          WebURLError& error,
 846                                          WebData& data) {
 847   SyncLoadResponse sync_load_response;
 848   context_->Start(request, &sync_load_response);
 849
 850   const GURL& final_url = sync_load_response.url;
 851
 852   // TODO(tc): For file loads, we may want to include a more descriptive
 853   // status code or status text.
 854   int error_code = sync_load_response.error_code;
 855   if (error_code != net::OK) {
 856     response.setURL(final_url);
 857     error.domain = WebString::fromUTF8(net::kErrorDomain);
 858     error.reason = error_code;
 859     error.unreachableURL = final_url;
 860     return;
 861   }
 862
 863   PopulateURLResponse(final_url, sync_load_response, &response);
 864
 865   data.assign(sync_load_response.data.data(),
 866               sync_load_response.data.size());
 867 }
 868
 869 void WebURLLoaderImpl::loadAsynchronously(const WebURLRequest& request,
 870                                           WebURLLoaderClient* client) {
 871   DCHECK(!context_->client());
 872
 873   context_->set_client(client);
 874   context_->Start(request, NULL);
 875 }
 876
 877 void WebURLLoaderImpl::cancel() {
 878   context_->Cancel();
 879 }
 880
 881 void WebURLLoaderImpl::setDefersLoading(bool value) {
 882   context_->SetDefersLoading(value);
 883 }
 884
 885 void WebURLLoaderImpl::didChangePriority(WebURLRequest::Priority new_priority,
 886                                          int intra_priority_value) {
 887   context_->DidChangePriority(new_priority, intra_priority_value);
 888 }
 889
 890 bool WebURLLoaderImpl::attachThreadedDataReceiver(
 891     blink::WebThreadedDataReceiver* threaded_data_receiver) {
 892   return context_->AttachThreadedDataReceiver(threaded_data_receiver);
 893 }
 894
 895 }  // namespace content