chrome_appcache_service.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 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_CHROME_APPCACHE_SERVICE_H_
6#define CONTENT_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_
7
8#include "base/compiler_specific.h"
9#include "base/memory/ref_counted.h"
10#include "base/sequenced_task_runner_helpers.h"
11#include "content/common/content_export.h"
12#include "content/public/browser/browser_thread.h"
13#include "webkit/appcache/appcache_policy.h"
14#include "webkit/appcache/appcache_service.h"
15#include "webkit/quota/special_storage_policy.h"
16
17class FilePath;
18
19namespace net {
20class URLRequestContextGetter;
21}
22
23namespace content {
24class ResourceContext;
25
26struct ChromeAppCacheServiceDeleter;
27
28// An AppCacheService subclass used by the chrome. There is an instance
29// associated with each BrowserContext. This derivation adds refcounting
30// semantics since a browser context has multiple URLRequestContexts which refer
31// to the same object, and those URLRequestContexts are refcounted independently
32// of the owning browser context.
33//
34// All methods, except the ctor, are expected to be called on
35// the IO thread (unless specifically called out in doc comments).
36//
37// TODO(dpranke): Fix dependencies on AppCacheService so that we don't have
38// to worry about clients calling AppCacheService methods.
39class CONTENT_EXPORT ChromeAppCacheService
40    : public base::RefCountedThreadSafe<ChromeAppCacheService,
41                                        ChromeAppCacheServiceDeleter>,
42      NON_EXPORTED_BASE(public appcache::AppCacheService),
43      NON_EXPORTED_BASE(public appcache::AppCachePolicy) {
44 public:
45  explicit ChromeAppCacheService(quota::QuotaManagerProxy* proxy);
46
47  void InitializeOnIOThread(
48      const FilePath& cache_path,  // may be empty to use in-memory structures
49      ResourceContext* resource_context,
50      net::URLRequestContextGetter* request_context_getter,
51      scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy);
52
53  // AppCachePolicy overrides
54  virtual bool CanLoadAppCache(const GURL& manifest_url,
55                               const GURL& first_party) OVERRIDE;
56  virtual bool CanCreateAppCache(const GURL& manifest_url,
57                                 const GURL& first_party) OVERRIDE;
58
59 protected:
60  virtual ~ChromeAppCacheService();
61
62 private:
63  friend class base::DeleteHelper<ChromeAppCacheService>;
64  friend class base::RefCountedThreadSafe<ChromeAppCacheService,
65                                          ChromeAppCacheServiceDeleter>;
66  friend struct ChromeAppCacheServiceDeleter;
67
68  void DeleteOnCorrectThread() const;
69
70  ResourceContext* resource_context_;
71  FilePath cache_path_;
72
73  DISALLOW_COPY_AND_ASSIGN(ChromeAppCacheService);
74};
75
76struct ChromeAppCacheServiceDeleter {
77  static void Destruct(const ChromeAppCacheService* service) {
78    service->DeleteOnCorrectThread();
79  }
80};
81
82}  // namespace content
83
84#endif  // CONTENT_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_
85