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