mojo/shell/loader.h

   1 // Copyright 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 MOJO_SHELL_LOADER_H_
   6 #define MOJO_SHELL_LOADER_H_
   7
   8 #include "base/files/file_path.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "base/threading/thread.h"
  12 #include "mojo/shell/url_request_context_getter.h"
  13 #include "net/url_request/url_fetcher.h"
  14 #include "net/url_request/url_fetcher_delegate.h"
  15 #include "url/gurl.h"
  16
  17 namespace net {
  18 class NetworkDelegate;
  19 }
  20
  21 namespace mojo {
  22 namespace shell {
  23
  24 class Loader {
  25  public:
  26   class Delegate {
  27    public:
  28     // |mime_type| is NULL if a mime type was not specified.
  29     virtual void DidCompleteLoad(const GURL& app_url,
  30                                  const base::FilePath& app_path,
  31                                  const std::string* mime_type) = 0;
  32
  33    protected:
  34     virtual ~Delegate();
  35   };
  36
  37   class Job : public net::URLFetcherDelegate {
  38    public:
  39     // You can cancel a job by deleting it.
  40     virtual ~Job();
  41
  42    private:
  43     friend class Loader;
  44
  45     // You can create a job using Loader::Load.
  46     Job(const GURL& app_url, Delegate* delegate);
  47     virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
  48
  49     scoped_ptr<net::URLFetcher> fetcher_;
  50     Delegate* delegate_;
  51
  52     DISALLOW_COPY_AND_ASSIGN(Job);
  53   };
  54
  55   Loader(base::SingleThreadTaskRunner* network_runner,
  56          base::SingleThreadTaskRunner* file_runner,
  57          base::MessageLoopProxy* cache_runner,
  58          scoped_ptr<net::NetworkDelegate> network_delegate,
  59          base::FilePath base_path);
  60   ~Loader();
  61
  62   scoped_ptr<Job> Load(const GURL& app_url, Delegate* delegate);
  63
  64  private:
  65   scoped_refptr<base::SingleThreadTaskRunner> file_runner_;
  66   scoped_refptr<URLRequestContextGetter> url_request_context_getter_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(Loader);
  69 };
  70
  71 }  // namespace shell
  72 }  // namespace mojo
  73
  74 #endif  // MOJO_SHELL_LOADER_H_