content/browser/loader/navigation_url_loader_delegate.h

   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 #ifndef CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_DELEGATE_H_
   6 #define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_DELEGATE_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/common/content_export.h"
  12
  13 namespace net {
  14 struct RedirectInfo;
  15 }
  16
  17 namespace content {
  18
  19 class StreamHandle;
  20 struct ResourceResponse;
  21
  22 // PlzNavigate: The delegate interface to NavigationURLLoader.
  23 class CONTENT_EXPORT NavigationURLLoaderDelegate {
  24  public:
  25   // Called when the request is redirected. Call FollowRedirect to continue
  26   // processing the request.
  27   virtual void OnRequestRedirected(
  28       const net::RedirectInfo& redirect_info,
  29       const scoped_refptr<ResourceResponse>& response) = 0;
  30
  31   // Called when the request receives its response. No further calls will be
  32   // made to the delegate. The response body is returned as a stream in
  33   // |body_stream|.
  34   virtual void OnResponseStarted(
  35       const scoped_refptr<ResourceResponse>& response,
  36       scoped_ptr<StreamHandle> body_stream) = 0;
  37
  38   // Called if the request fails before receving a response. |net_error| is a
  39   // network error code for the failure. |has_stale_copy_in_cache| is true if
  40   // there is a stale copy of the unreachable page in cache.
  41   virtual void OnRequestFailed(bool has_stale_copy_in_cache, int net_error) = 0;
  42
  43   // Called after the network request has begun on the IO thread at time
  44   // |timestamp|. This is just a thread hop but is used to compare timing
  45   // against the pre-PlzNavigate codepath which didn't start the network request
  46   // until after the renderer was initialized.
  47   virtual void OnRequestStarted(base::TimeTicks timestamp) = 0;
  48
  49  protected:
  50   NavigationURLLoaderDelegate() {}
  51   virtual ~NavigationURLLoaderDelegate() {}
  52
  53  private:
  54   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderDelegate);
  55 };
  56
  57 }  // namespace content
  58
  59 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_DELEGATE_H_