chrome_appcache_service.h revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
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 "webkit/appcache/appcache_policy.h"
13#include "webkit/appcache/appcache_service.h"
14#include "webkit/quota/special_storage_policy.h"
15
16namespace base {
17class FilePath;
18}
19
20namespace net {
21class URLRequestContextGetter;
22}
23
24namespace content {
25class ResourceContext;
26
27struct ChromeAppCacheServiceDeleter;
28
29// An AppCacheService subclass used by the chrome. There is an instance
30// associated with each BrowserContext. This derivation adds refcounting
31// semantics since a browser context has multiple URLRequestContexts which refer
32// to the same object, and those URLRequestContexts are refcounted independently
33// of the owning browser context.
34//
35// All methods, except the ctor, are expected to be called on
36// the IO thread (unless specifically called out in doc comments).
37//
38// TODO(dpranke): Fix dependencies on AppCacheService so that we don't have
39// to worry about clients calling AppCacheService methods.
40class CONTENT_EXPORT ChromeAppCacheService
41    : public base::RefCountedThreadSafe<ChromeAppCacheService,
42                                        ChromeAppCacheServiceDeleter>,
43      NON_EXPORTED_BASE(public appcache::AppCacheService),
44      NON_EXPORTED_BASE(public appcache::AppCachePolicy) {
45 public:
46  explicit ChromeAppCacheService(quota::QuotaManagerProxy* proxy);
47
48  void InitializeOnIOThread(
49      const base::FilePath& cache_path,  // May be empty to use in-memory structs.
50      ResourceContext* resource_context,
51      net::URLRequestContextGetter* request_context_getter,
52      scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy);
53
54  // AppCachePolicy overrides
55  virtual bool CanLoadAppCache(const GURL& manifest_url,
56                               const GURL& first_party) OVERRIDE;
57  virtual bool CanCreateAppCache(const GURL& manifest_url,
58                                 const GURL& first_party) OVERRIDE;
59
60 protected:
61  virtual ~ChromeAppCacheService();
62
63 private:
64  friend class base::DeleteHelper<ChromeAppCacheService>;
65  friend class base::RefCountedThreadSafe<ChromeAppCacheService,
66                                          ChromeAppCacheServiceDeleter>;
67  friend struct ChromeAppCacheServiceDeleter;
68
69  void DeleteOnCorrectThread() const;
70
71  ResourceContext* resource_context_;
72  base::FilePath cache_path_;
73
74  DISALLOW_COPY_AND_ASSIGN(ChromeAppCacheService);
75};
76
77struct ChromeAppCacheServiceDeleter {
78  static void Destruct(const ChromeAppCacheService* service) {
79    service->DeleteOnCorrectThread();
80  }
81};
82
83}  // namespace content
84
85#endif  // CONTENT_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_
86