ios/web/webui/url_fetcher_block_adapter.h

   1 // Copyright 2015 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 IOS_WEB_WEBUI_URL_FETCHER_BLOCK_ADAPTER_H_
   6 #define IOS_WEB_WEBUI_URL_FETCHER_BLOCK_ADAPTER_H_
   7
   8 #import <Foundation/Foundation.h>
   9
  10 #include "base/mac/scoped_block.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "net/url_request/url_fetcher_delegate.h"
  13 #include "url/gurl.h"
  14
  15 namespace net {
  16 class URLFetcher;
  17 class URLRequestContextGetter;
  18 }  // namespace net
  19
  20 namespace web {
  21
  22 // Class for use of URLFetcher from Objective-C with a completion handler block.
  23 class URLFetcherBlockAdapter;
  24 // Block type for URLFetcherBlockAdapter callbacks.
  25 typedef void (^URLFetcherBlockAdapterCompletion)(NSData*,
  26                                                  URLFetcherBlockAdapter*);
  27
  28 // Class to manage retrieval of WebUI resources.
  29 class URLFetcherBlockAdapter : public net::URLFetcherDelegate {
  30  public:
  31   // Creates URLFetcherBlockAdapter for resource at |url| with
  32   // |request_context|.
  33   // |completion_handler| is called with results of the fetch.
  34   URLFetcherBlockAdapter(
  35       const GURL& url,
  36       net::URLRequestContextGetter* request_context,
  37       web::URLFetcherBlockAdapterCompletion completion_handler);
  38   ~URLFetcherBlockAdapter() override;
  39   // Starts the fetch.
  40   virtual void Start();
  41
  42  protected:
  43   // net::URLFetcherDelegate implementation.
  44   void OnURLFetchComplete(const net::URLFetcher* source) override;
  45
  46  private:
  47   // The URL to fetch.
  48   const GURL url_;
  49   // The request context.
  50   net::URLRequestContextGetter* request_context_;
  51   // Callback for resource load.
  52   base::mac::ScopedBlock<web::URLFetcherBlockAdapterCompletion>
  53       completion_handler_;
  54   // URLFetcher for retrieving data from net stack.
  55   scoped_ptr<net::URLFetcher> fetcher_;
  56 };
  57
  58 }  // namespace web
  59
  60 #endif  // IOS_WEB_WEBUI_URL_FETCHER_BLOCK_ADAPTER_H_