text: // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CHROME_BROWSER_RENDERER_HOST_CROSS_SITE_RESOURCE_HANDLER_H_
  #define CHROME_BROWSER_RENDERER_HOST_CROSS_SITE_RESOURCE_HANDLER_H_
  
  #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
  #include "chrome/browser/renderer_host/resource_handler.h"
  
  // Ensures that cross-site responses are delayed until the onunload handler of
  // the previous page is allowed to run.  This handler wraps an
  // AsyncEventHandler, and it sits inside SafeBrowsing and Buffered event
  // handlers.  This is important, so that it can intercept OnResponseStarted
  // after we determine that a response is safe and not a download.
  class CrossSiteResourceHandler : public ResourceHandler {
   public:
    CrossSiteResourceHandler(ResourceHandler* handler,
                             int render_process_host_id,
                             int render_view_id,
                             ResourceDispatcherHost* resource_dispatcher_host);
  
    // ResourceHandler implementation:
    bool OnRequestRedirected(int request_id, const GURL& new_url);
    bool OnResponseStarted(int request_id,
                           ResourceResponse* response);
    bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
                    int min_size);
    bool OnReadCompleted(int request_id, int* bytes_read);
    bool OnResponseCompleted(int request_id,
                             const URLRequestStatus& status,
                             const std::string& security_info);
  
    // We can now send the response to the new renderer, which will cause
    // TabContents to swap in the new renderer and destroy the old one.
    void ResumeResponse();
  
   private:
    // Prepare to render the cross-site response in a new RenderViewHost, by
    // telling the old RenderViewHost to run its onunload handler.
    void StartCrossSiteTransition(
        int request_id,
        ResourceResponse* response,
        ResourceDispatcherHost::GlobalRequestID global_id);
  
    scoped_refptr<ResourceHandler> next_handler_;
    int render_process_host_id_;
    int render_view_id_;
    bool has_started_response_;
    bool in_cross_site_transition_;
    int request_id_;
    bool completed_during_transition_;
    URLRequestStatus completed_status_;
    std::string completed_security_info_;
    ResourceResponse* response_;
    ResourceDispatcherHost* rdh_;
  
    DISALLOW_COPY_AND_ASSIGN(CrossSiteResourceHandler);
  };
  
  #endif  // CHROME_BROWSER_RENDERER_HOST_CROSS_SITE_RESOURCE_HANDLER_H_
  