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      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 #ifndef CONTENT_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_
      6 #define CONTENT_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_
      7 
      8 #include "content/browser/loader/layered_resource_handler.h"
      9 #include "net/url_request/url_request_status.h"
     10 
     11 namespace net {
     12 class URLRequest;
     13 }
     14 
     15 namespace content {
     16 
     17 // Ensures that cross-site responses are delayed until the onunload handler of
     18 // the previous page is allowed to run.  This handler wraps an
     19 // AsyncEventHandler, and it sits inside SafeBrowsing and Buffered event
     20 // handlers.  This is important, so that it can intercept OnResponseStarted
     21 // after we determine that a response is safe and not a download.
     22 class CrossSiteResourceHandler : public LayeredResourceHandler {
     23  public:
     24   CrossSiteResourceHandler(scoped_ptr<ResourceHandler> next_handler,
     25                            int render_process_host_id,
     26                            int render_view_id,
     27                            net::URLRequest* request);
     28   virtual ~CrossSiteResourceHandler();
     29 
     30   // ResourceHandler implementation:
     31   virtual bool OnRequestRedirected(int request_id,
     32                                    const GURL& new_url,
     33                                    ResourceResponse* response,
     34                                    bool* defer) OVERRIDE;
     35   virtual bool OnResponseStarted(int request_id,
     36                                  ResourceResponse* response,
     37                                  bool* defer) OVERRIDE;
     38   virtual bool OnReadCompleted(int request_id,
     39                                int bytes_read,
     40                                bool* defer) OVERRIDE;
     41   virtual bool OnResponseCompleted(int request_id,
     42                                    const net::URLRequestStatus& status,
     43                                    const std::string& security_info) OVERRIDE;
     44 
     45   // We can now send the response to the new renderer, which will cause
     46   // WebContentsImpl to swap in the new renderer and destroy the old one.
     47   void ResumeResponse();
     48 
     49  private:
     50   // Prepare to render the cross-site response in a new RenderViewHost, by
     51   // telling the old RenderViewHost to run its onunload handler.
     52   void StartCrossSiteTransition(
     53       int request_id,
     54       ResourceResponse* response);
     55 
     56   void ResumeIfDeferred();
     57 
     58   int render_process_host_id_;
     59   int render_view_id_;
     60   net::URLRequest* request_;
     61   bool has_started_response_;
     62   bool in_cross_site_transition_;
     63   int request_id_;
     64   bool completed_during_transition_;
     65   bool did_defer_;
     66   net::URLRequestStatus completed_status_;
     67   std::string completed_security_info_;
     68   ResourceResponse* response_;
     69 
     70   DISALLOW_COPY_AND_ASSIGN(CrossSiteResourceHandler);
     71 };
     72 
     73 }  // namespace content
     74 
     75 #endif  // CONTENT_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_
     76