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      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 WEBKIT_BROWSER_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_
      6 #define WEBKIT_BROWSER_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "url/gurl.h"
     11 #include "webkit/browser/webkit_storage_browser_export.h"
     12 
     13 namespace net {
     14 class IOBuffer;
     15 class URLRequest;
     16 }
     17 
     18 namespace appcache {
     19 
     20 // An interface that must be provided by the embedder to support this feature.
     21 class WEBKIT_STORAGE_BROWSER_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 WEBKIT_STORAGE_BROWSER_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 appcache
     53 
     54 #endif  // WEBKIT_BROWSER_APPCACHE_APPCACHE_EXECUTABLE_HANDLER_H_
     55