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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WEBKIT_APPCACHE_APPCACHE_SERVICE_H_
#define WEBKIT_APPCACHE_APPCACHE_SERVICE_H_
#include <map>
#include <set>
#include "base/gtest_prod_util.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "net/base/completion_callback.h"
#include "net/base/net_errors.h"
#include "webkit/appcache/appcache_interfaces.h"
#include "webkit/appcache/appcache_storage.h"
#include "webkit/storage/webkit_storage_export.h"
namespace net {
class URLRequestContext;
} // namespace net
namespace base {
class FilePath;
class MessageLoopProxy;
}
namespace quota {
class QuotaManagerProxy;
class SpecialStoragePolicy;
}
namespace appcache {
class AppCacheBackendImpl;
class AppCacheQuotaClient;
class AppCachePolicy;
// Refcounted container to avoid copying the collection in callbacks.
struct WEBKIT_STORAGE_EXPORT AppCacheInfoCollection
: public base::RefCountedThreadSafe<AppCacheInfoCollection> {
AppCacheInfoCollection();
std::map<GURL, AppCacheInfoVector> infos_by_origin;
private:
friend class base::RefCountedThreadSafe<AppCacheInfoCollection>;
virtual ~AppCacheInfoCollection();
};
// Class that manages the application cache service. Sends notifications
// to many frontends. One instance per user-profile. Each instance has
// exclusive access to its cache_directory on disk.
class WEBKIT_STORAGE_EXPORT AppCacheService {
public:
// If not using quota management, the proxy may be NULL.
explicit AppCacheService(quota::QuotaManagerProxy* quota_manager_proxy);
virtual ~AppCacheService();
void Initialize(const base::FilePath& cache_directory,
base::MessageLoopProxy* db_thread,
base::MessageLoopProxy* cache_thread);
// Purges any memory not needed.
void PurgeMemory() {
if (storage_.get())
storage_->PurgeMemory();
}
// Determines if a request for 'url' can be satisfied while offline.
// This method always completes asynchronously.
void CanHandleMainResourceOffline(const GURL& url,
const GURL& first_party,
const net::CompletionCallback& callback);
// Populates 'collection' with info about all of the appcaches stored
// within the service, 'callback' is invoked upon completion. The service
// acquires a reference to the 'collection' until until completion.
// This method always completes asynchronously.
void GetAllAppCacheInfo(AppCacheInfoCollection* collection,
const net::CompletionCallback& callback);
// Deletes the group identified by 'manifest_url', 'callback' is
// invoked upon completion. Upon completion, the cache group and
// any resources within the group are no longer loadable and all
// subresource loads for pages associated with a deleted group
// will fail. This method always completes asynchronously.
void DeleteAppCacheGroup(const GURL& manifest_url,
const net::CompletionCallback& callback);
// Deletes all appcaches for the origin, 'callback' is invoked upon
// completion. This method always completes asynchronously.
// (virtual for unit testing)
virtual void DeleteAppCachesForOrigin(
const GURL& origin, const net::CompletionCallback& callback);
// Checks the integrity of 'response_id' by reading the headers and data.
// If it cannot be read, the cache group for 'manifest_url' is deleted.
void CheckAppCacheResponse(const GURL& manifest_url, int64 cache_id,
int64 response_id);
// Context for use during cache updates, should only be accessed
// on the IO thread. We do NOT add a reference to the request context,
// it is the callers responsibility to ensure that the pointer
// remains valid while set.
net::URLRequestContext* request_context() const { return request_context_; }
void set_request_context(net::URLRequestContext* context) {
request_context_ = context;
}
// The appcache policy, may be null, in which case access is always allowed.
// The service does NOT assume ownership of the policy, it is the callers
// responsibility to ensure that the pointer remains valid while set.
AppCachePolicy* appcache_policy() const { return appcache_policy_; }
void set_appcache_policy(AppCachePolicy* policy) {
appcache_policy_ = policy;
}
quota::SpecialStoragePolicy* special_storage_policy() const {
return special_storage_policy_.get();
}
void set_special_storage_policy(quota::SpecialStoragePolicy* policy);
quota::QuotaManagerProxy* quota_manager_proxy() const {
return quota_manager_proxy_.get();
}
AppCacheQuotaClient* quota_client() const {
return quota_client_;
}
// Each child process in chrome uses a distinct backend instance.
// See chrome/browser/AppCacheDispatcherHost.
void RegisterBackend(AppCacheBackendImpl* backend_impl);
void UnregisterBackend(AppCacheBackendImpl* backend_impl);
AppCacheBackendImpl* GetBackend(int id) const {
BackendMap::const_iterator it = backends_.find(id);
return (it != backends_.end()) ? it->second : NULL;
}
AppCacheStorage* storage() const { return storage_.get(); }
// Disables the exit-time deletion of session-only data.
void set_force_keep_session_state() { force_keep_session_state_ = true; }
bool force_keep_session_state() const { return force_keep_session_state_; }
protected:
friend class AppCacheStorageImplTest;
friend class AppCacheServiceTest;
class AsyncHelper;
class CanHandleOfflineHelper;
class DeleteHelper;
class DeleteOriginHelper;
class GetInfoHelper;
class CheckResponseHelper;
typedef std::set<AsyncHelper*> PendingAsyncHelpers;
typedef std::map<int, AppCacheBackendImpl*> BackendMap;
AppCachePolicy* appcache_policy_;
AppCacheQuotaClient* quota_client_;
scoped_ptr<AppCacheStorage> storage_;
scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
PendingAsyncHelpers pending_helpers_;
BackendMap backends_; // One 'backend' per child process.
// Context for use during cache updates.
net::URLRequestContext* request_context_;
// If true, nothing (not even session-only data) should be deleted on exit.
bool force_keep_session_state_;
DISALLOW_COPY_AND_ASSIGN(AppCacheService);
};
} // namespace appcache
#endif // WEBKIT_APPCACHE_APPCACHE_SERVICE_H_
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