android_webview/browser/renderer_host/aw_resource_dispatcher_host_delegate.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "android_webview/browser/renderer_host/aw_resource_dispatcher_host_delegate.h"
   6
   7 #include <string>
   8
   9 #include "android_webview/browser/aw_contents_io_thread_client.h"
  10 #include "android_webview/browser/aw_login_delegate.h"
  11 #include "android_webview/browser/aw_resource_context.h"
  12 #include "android_webview/common/url_constants.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/scoped_vector.h"
  15 #include "components/auto_login_parser/auto_login_parser.h"
  16 #include "components/navigation_interception/intercept_navigation_delegate.h"
  17 #include "content/public/browser/browser_thread.h"
  18 #include "content/public/browser/resource_controller.h"
  19 #include "content/public/browser/resource_dispatcher_host.h"
  20 #include "content/public/browser/resource_dispatcher_host_login_delegate.h"
  21 #include "content/public/browser/resource_request_info.h"
  22 #include "content/public/browser/resource_throttle.h"
  23 #include "net/base/load_flags.h"
  24 #include "net/base/net_errors.h"
  25 #include "net/http/http_response_headers.h"
  26 #include "net/url_request/url_request.h"
  27 #include "url/url_constants.h"
  28
  29 using android_webview::AwContentsIoThreadClient;
  30 using content::BrowserThread;
  31 using content::ResourceType;
  32 using navigation_interception::InterceptNavigationDelegate;
  33
  34 namespace {
  35
  36 base::LazyInstance<android_webview::AwResourceDispatcherHostDelegate>
  37     g_webview_resource_dispatcher_host_delegate = LAZY_INSTANCE_INITIALIZER;
  38
  39 void SetCacheControlFlag(
  40     net::URLRequest* request, int flag) {
  41   const int all_cache_control_flags = net::LOAD_BYPASS_CACHE |
  42       net::LOAD_VALIDATE_CACHE |
  43       net::LOAD_PREFERRING_CACHE |
  44       net::LOAD_ONLY_FROM_CACHE;
  45   DCHECK_EQ((flag & all_cache_control_flags), flag);
  46   int load_flags = request->load_flags();
  47   load_flags &= ~all_cache_control_flags;
  48   load_flags |= flag;
  49   request->SetLoadFlags(load_flags);
  50 }
  51
  52 }  // namespace
  53
  54 namespace android_webview {
  55
  56 // Calls through the IoThreadClient to check the embedders settings to determine
  57 // if the request should be cancelled. There may not always be an IoThreadClient
  58 // available for the |render_process_id|, |render_frame_id| pair (in the case of
  59 // newly created pop up windows, for example) and in that case the request and
  60 // the client callbacks will be deferred the request until a client is ready.
  61 class IoThreadClientThrottle : public content::ResourceThrottle {
  62  public:
  63   IoThreadClientThrottle(int render_process_id,
  64                          int render_frame_id,
  65                          net::URLRequest* request);
  66   virtual ~IoThreadClientThrottle();
  67
  68   // From content::ResourceThrottle
  69   virtual void WillStartRequest(bool* defer) override;
  70   virtual void WillRedirectRequest(const GURL& new_url, bool* defer) override;
  71   virtual const char* GetNameForLogging() const override;
  72
  73   void OnIoThreadClientReady(int new_render_process_id,
  74                              int new_render_frame_id);
  75   bool MaybeBlockRequest();
  76   bool ShouldBlockRequest();
  77   int render_process_id() const { return render_process_id_; }
  78   int render_frame_id() const { return render_frame_id_; }
  79
  80  private:
  81   int render_process_id_;
  82   int render_frame_id_;
  83   net::URLRequest* request_;
  84 };
  85
  86 IoThreadClientThrottle::IoThreadClientThrottle(int render_process_id,
  87                                                int render_frame_id,
  88                                                net::URLRequest* request)
  89     : render_process_id_(render_process_id),
  90       render_frame_id_(render_frame_id),
  91       request_(request) { }
  92
  93 IoThreadClientThrottle::~IoThreadClientThrottle() {
  94   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  95   g_webview_resource_dispatcher_host_delegate.Get().
  96       RemovePendingThrottleOnIoThread(this);
  97 }
  98
  99 const char* IoThreadClientThrottle::GetNameForLogging() const {
 100   return "IoThreadClientThrottle";
 101 }
 102
 103 void IoThreadClientThrottle::WillStartRequest(bool* defer) {
 104   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 105   if (render_frame_id_ < 1)
 106     return;
 107   DCHECK(render_process_id_);
 108   *defer = false;
 109
 110   // Defer all requests of a pop up that is still not associated with Java
 111   // client so that the client will get a chance to override requests.
 112   scoped_ptr<AwContentsIoThreadClient> io_client =
 113       AwContentsIoThreadClient::FromID(render_process_id_, render_frame_id_);
 114   if (io_client && io_client->PendingAssociation()) {
 115     *defer = true;
 116     AwResourceDispatcherHostDelegate::AddPendingThrottle(
 117         render_process_id_, render_frame_id_, this);
 118   } else {
 119     MaybeBlockRequest();
 120   }
 121 }
 122
 123 void IoThreadClientThrottle::WillRedirectRequest(const GURL& new_url,
 124                                                  bool* defer) {
 125   WillStartRequest(defer);
 126 }
 127
 128 void IoThreadClientThrottle::OnIoThreadClientReady(int new_render_process_id,
 129                                                    int new_render_frame_id) {
 130   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 131
 132   if (!MaybeBlockRequest()) {
 133     controller()->Resume();
 134   }
 135 }
 136
 137 bool IoThreadClientThrottle::MaybeBlockRequest() {
 138   if (ShouldBlockRequest()) {
 139     controller()->CancelWithError(net::ERR_ACCESS_DENIED);
 140     return true;
 141   }
 142   return false;
 143 }
 144
 145 bool IoThreadClientThrottle::ShouldBlockRequest() {
 146   scoped_ptr<AwContentsIoThreadClient> io_client =
 147       AwContentsIoThreadClient::FromID(render_process_id_, render_frame_id_);
 148   if (!io_client)
 149     return false;
 150
 151   // Part of implementation of WebSettings.allowContentAccess.
 152   if (request_->url().SchemeIs(android_webview::kContentScheme) &&
 153       io_client->ShouldBlockContentUrls()) {
 154     return true;
 155   }
 156
 157   // Part of implementation of WebSettings.allowFileAccess.
 158   if (request_->url().SchemeIsFile() &&
 159       io_client->ShouldBlockFileUrls()) {
 160     const GURL& url = request_->url();
 161     if (!url.has_path() ||
 162         // Application's assets and resources are always available.
 163         (url.path().find(android_webview::kAndroidResourcePath) != 0 &&
 164          url.path().find(android_webview::kAndroidAssetPath) != 0)) {
 165       return true;
 166     }
 167   }
 168
 169   if (io_client->ShouldBlockNetworkLoads()) {
 170     if (request_->url().SchemeIs(url::kFtpScheme)) {
 171       return true;
 172     }
 173     SetCacheControlFlag(request_, net::LOAD_ONLY_FROM_CACHE);
 174   } else {
 175     AwContentsIoThreadClient::CacheMode cache_mode = io_client->GetCacheMode();
 176     switch(cache_mode) {
 177       case AwContentsIoThreadClient::LOAD_CACHE_ELSE_NETWORK:
 178         SetCacheControlFlag(request_, net::LOAD_PREFERRING_CACHE);
 179         break;
 180       case AwContentsIoThreadClient::LOAD_NO_CACHE:
 181         SetCacheControlFlag(request_, net::LOAD_BYPASS_CACHE);
 182         break;
 183       case AwContentsIoThreadClient::LOAD_CACHE_ONLY:
 184         SetCacheControlFlag(request_, net::LOAD_ONLY_FROM_CACHE);
 185         break;
 186       default:
 187         break;
 188     }
 189   }
 190   return false;
 191 }
 192
 193 // static
 194 void AwResourceDispatcherHostDelegate::ResourceDispatcherHostCreated() {
 195   content::ResourceDispatcherHost::Get()->SetDelegate(
 196       &g_webview_resource_dispatcher_host_delegate.Get());
 197 }
 198
 199 AwResourceDispatcherHostDelegate::AwResourceDispatcherHostDelegate()
 200     : content::ResourceDispatcherHostDelegate() {
 201 }
 202
 203 AwResourceDispatcherHostDelegate::~AwResourceDispatcherHostDelegate() {
 204 }
 205
 206 void AwResourceDispatcherHostDelegate::RequestBeginning(
 207     net::URLRequest* request,
 208     content::ResourceContext* resource_context,
 209     content::AppCacheService* appcache_service,
 210     ResourceType resource_type,
 211     ScopedVector<content::ResourceThrottle>* throttles) {
 212
 213   AddExtraHeadersIfNeeded(request, resource_context);
 214
 215   const content::ResourceRequestInfo* request_info =
 216       content::ResourceRequestInfo::ForRequest(request);
 217
 218   // We always push the throttles here. Checking the existence of io_client
 219   // is racy when a popup window is created. That is because RequestBeginning
 220   // is called whether or not requests are blocked via BlockRequestForRoute()
 221   // however io_client may or may not be ready at the time depending on whether
 222   // webcontents is created.
 223   throttles->push_back(new IoThreadClientThrottle(
 224       request_info->GetChildID(), request_info->GetRenderFrameID(), request));
 225
 226   // We allow intercepting only navigations within main frames. This
 227   // is used to post onPageStarted. We handle shouldOverrideUrlLoading
 228   // via a sync IPC.
 229   if (resource_type == content::RESOURCE_TYPE_MAIN_FRAME)
 230     throttles->push_back(InterceptNavigationDelegate::CreateThrottleFor(
 231         request));
 232 }
 233
 234 void AwResourceDispatcherHostDelegate::OnRequestRedirected(
 235     const GURL& redirect_url,
 236     net::URLRequest* request,
 237     content::ResourceContext* resource_context,
 238     content::ResourceResponse* response) {
 239   AddExtraHeadersIfNeeded(request, resource_context);
 240 }
 241
 242
 243 void AwResourceDispatcherHostDelegate::DownloadStarting(
 244     net::URLRequest* request,
 245     content::ResourceContext* resource_context,
 246     int child_id,
 247     int route_id,
 248     int request_id,
 249     bool is_content_initiated,
 250     bool must_download,
 251     ScopedVector<content::ResourceThrottle>* throttles) {
 252   GURL url(request->url());
 253   std::string user_agent;
 254   std::string content_disposition;
 255   std::string mime_type;
 256   int64 content_length = request->GetExpectedContentSize();
 257
 258   request->extra_request_headers().GetHeader(
 259       net::HttpRequestHeaders::kUserAgent, &user_agent);
 260
 261
 262   net::HttpResponseHeaders* response_headers = request->response_headers();
 263   if (response_headers) {
 264     response_headers->GetNormalizedHeader("content-disposition",
 265         &content_disposition);
 266     response_headers->GetMimeType(&mime_type);
 267   }
 268
 269   request->Cancel();
 270
 271   const content::ResourceRequestInfo* request_info =
 272       content::ResourceRequestInfo::ForRequest(request);
 273
 274   scoped_ptr<AwContentsIoThreadClient> io_client =
 275       AwContentsIoThreadClient::FromID(
 276           child_id, request_info->GetRenderFrameID());
 277
 278   // POST request cannot be repeated in general, so prevent client from
 279   // retrying the same request, even if it is with a GET.
 280   if ("GET" == request->method() && io_client) {
 281     io_client->NewDownload(url,
 282                            user_agent,
 283                            content_disposition,
 284                            mime_type,
 285                            content_length);
 286   }
 287 }
 288
 289 content::ResourceDispatcherHostLoginDelegate*
 290     AwResourceDispatcherHostDelegate::CreateLoginDelegate(
 291         net::AuthChallengeInfo* auth_info,
 292         net::URLRequest* request) {
 293   return new AwLoginDelegate(auth_info, request);
 294 }
 295
 296 bool AwResourceDispatcherHostDelegate::HandleExternalProtocol(const GURL& url,
 297                                                               int child_id,
 298                                                               int route_id) {
 299   // The AwURLRequestJobFactory implementation should ensure this method never
 300   // gets called.
 301   NOTREACHED();
 302   return false;
 303 }
 304
 305 void AwResourceDispatcherHostDelegate::OnResponseStarted(
 306     net::URLRequest* request,
 307     content::ResourceContext* resource_context,
 308     content::ResourceResponse* response,
 309     IPC::Sender* sender) {
 310   const content::ResourceRequestInfo* request_info =
 311       content::ResourceRequestInfo::ForRequest(request);
 312   if (!request_info) {
 313     DLOG(FATAL) << "Started request without associated info: " <<
 314         request->url();
 315     return;
 316   }
 317
 318   if (request_info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME) {
 319     // Check for x-auto-login header.
 320     auto_login_parser::HeaderData header_data;
 321     if (auto_login_parser::ParserHeaderInResponse(
 322             request, auto_login_parser::ALLOW_ANY_REALM, &header_data)) {
 323       scoped_ptr<AwContentsIoThreadClient> io_client =
 324           AwContentsIoThreadClient::FromID(request_info->GetChildID(),
 325                                            request_info->GetRenderFrameID());
 326       if (io_client) {
 327         io_client->NewLoginRequest(
 328             header_data.realm, header_data.account, header_data.args);
 329       }
 330     }
 331   }
 332 }
 333
 334 void AwResourceDispatcherHostDelegate::RemovePendingThrottleOnIoThread(
 335     IoThreadClientThrottle* throttle) {
 336   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 337   PendingThrottleMap::iterator it = pending_throttles_.find(
 338       FrameRouteIDPair(throttle->render_process_id(),
 339                        throttle->render_frame_id()));
 340   if (it != pending_throttles_.end()) {
 341     pending_throttles_.erase(it);
 342   }
 343 }
 344
 345 // static
 346 void AwResourceDispatcherHostDelegate::OnIoThreadClientReady(
 347     int new_render_process_id,
 348     int new_render_frame_id) {
 349   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
 350       base::Bind(
 351           &AwResourceDispatcherHostDelegate::OnIoThreadClientReadyInternal,
 352           base::Unretained(
 353               g_webview_resource_dispatcher_host_delegate.Pointer()),
 354           new_render_process_id, new_render_frame_id));
 355 }
 356
 357 // static
 358 void AwResourceDispatcherHostDelegate::AddPendingThrottle(
 359     int render_process_id,
 360     int render_frame_id,
 361     IoThreadClientThrottle* pending_throttle) {
 362   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
 363       base::Bind(
 364           &AwResourceDispatcherHostDelegate::AddPendingThrottleOnIoThread,
 365           base::Unretained(
 366               g_webview_resource_dispatcher_host_delegate.Pointer()),
 367           render_process_id, render_frame_id, pending_throttle));
 368 }
 369
 370 void AwResourceDispatcherHostDelegate::AddPendingThrottleOnIoThread(
 371     int render_process_id,
 372     int render_frame_id_id,
 373     IoThreadClientThrottle* pending_throttle) {
 374   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 375   pending_throttles_.insert(
 376       std::pair<FrameRouteIDPair, IoThreadClientThrottle*>(
 377           FrameRouteIDPair(render_process_id, render_frame_id_id),
 378           pending_throttle));
 379 }
 380
 381 void AwResourceDispatcherHostDelegate::OnIoThreadClientReadyInternal(
 382     int new_render_process_id,
 383     int new_render_frame_id) {
 384   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 385   PendingThrottleMap::iterator it = pending_throttles_.find(
 386       FrameRouteIDPair(new_render_process_id, new_render_frame_id));
 387
 388   if (it != pending_throttles_.end()) {
 389     IoThreadClientThrottle* throttle = it->second;
 390     throttle->OnIoThreadClientReady(new_render_process_id, new_render_frame_id);
 391     pending_throttles_.erase(it);
 392   }
 393 }
 394
 395 void AwResourceDispatcherHostDelegate::AddExtraHeadersIfNeeded(
 396     net::URLRequest* request,
 397     content::ResourceContext* resource_context) {
 398   const content::ResourceRequestInfo* request_info =
 399       content::ResourceRequestInfo::ForRequest(request);
 400   if (!request_info)
 401     return;
 402   if (request_info->GetResourceType() != content::RESOURCE_TYPE_MAIN_FRAME)
 403     return;
 404
 405   const ui::PageTransition transition = request_info->GetPageTransition();
 406   const bool is_load_url =
 407       transition & ui::PAGE_TRANSITION_FROM_API;
 408   const bool is_go_back_forward =
 409       transition & ui::PAGE_TRANSITION_FORWARD_BACK;
 410   const bool is_reload = ui::PageTransitionCoreTypeIs(
 411       transition, ui::PAGE_TRANSITION_RELOAD);
 412   if (is_load_url || is_go_back_forward || is_reload) {
 413     AwResourceContext* awrc = static_cast<AwResourceContext*>(resource_context);
 414     std::string extra_headers = awrc->GetExtraHeaders(request->url());
 415     if (!extra_headers.empty()) {
 416       net::HttpRequestHeaders headers;
 417       headers.AddHeadersFromString(extra_headers);
 418       for (net::HttpRequestHeaders::Iterator it(headers); it.GetNext(); ) {
 419         request->SetExtraRequestHeaderByName(it.name(), it.value(), false);
 420       }
 421     }
 422   }
 423 }
 424
 425 }  // namespace android_webview