content/browser/appcache/appcache_executable_handler.h

   1 // Copyright (c) 2013 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_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_
   6 #define CONTENT_BROWSER_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/common/content_export.h"
  11 #include "url/gurl.h"
  12
  13 namespace net {
  14 class IOBuffer;
  15 class URLRequest;
  16 }
  17
  18 namespace content {
  19
  20 // An interface that must be provided by the embedder to support this feature.
  21 class CONTENT_EXPORT AppCacheExecutableHandler {
  22  public:
  23   // A handler can respond in one of 4 ways, if each of the GURL fields
  24   // in 'Response' are empty and use_network is false, an error response is
  25   // synthesized.
  26   struct Response {
  27     GURL cached_resource_url;
  28     GURL redirect_url;
  29     bool use_network;
  30     // TODO: blob + headers would be a good one to provide as well, as it would
  31     // make templating possible.
  32   };
  33   typedef base::Callback<void(const Response&)> ResponseCallback;
  34
  35   // Deletion of the handler cancels all pending callbacks.
  36   virtual ~AppCacheExecutableHandler() {}
  37
  38   virtual void HandleRequest(net::URLRequest* req,
  39                              ResponseCallback callback) = 0;
  40 };
  41
  42 // A factory to produce instances.
  43 class CONTENT_EXPORT AppCacheExecutableHandlerFactory {
  44  public:
  45   virtual scoped_ptr<AppCacheExecutableHandler> CreateHandler(
  46       const GURL& handler_url, net::IOBuffer* handler_source) = 0;
  47
  48  protected:
  49   virtual ~AppCacheExecutableHandlerFactory() {}
  50 };
  51
  52 }  // namespace content
  53
  54 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_