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// Copyright (c) 2009 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.
#include "webkit/appcache/appcache_service.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/stl_util-inl.h"
#include "webkit/appcache/appcache_backend_impl.h"
#include "webkit/appcache/appcache_entry.h"
#include "webkit/appcache/appcache_storage_impl.h"
#include "webkit/quota/special_storage_policy.h"
namespace appcache {
AppCacheInfoCollection::AppCacheInfoCollection() {}
AppCacheInfoCollection::~AppCacheInfoCollection() {}
// AsyncHelper -------
class AppCacheService::AsyncHelper
: public AppCacheStorage::Delegate {
public:
AsyncHelper(
AppCacheService* service, net::CompletionCallback* callback)
: service_(service), callback_(callback) {
service_->pending_helpers_.insert(this);
}
virtual ~AsyncHelper() {
if (service_)
service_->pending_helpers_.erase(this);
}
virtual void Start() = 0;
virtual void Cancel();
protected:
void CallCallback(int rv) {
if (callback_) {
// Defer to guarentee async completion.
MessageLoop::current()->PostTask(
FROM_HERE,
NewRunnableFunction(&DeferredCallCallback, callback_, rv));
}
callback_ = NULL;
}
static void DeferredCallCallback(net::CompletionCallback* callback, int rv) {
callback->Run(rv);
}
AppCacheService* service_;
net::CompletionCallback* callback_;
};
void AppCacheService::AsyncHelper::Cancel() {
CallCallback(net::ERR_ABORTED);
service_->storage()->CancelDelegateCallbacks(this);
service_ = NULL;
}
// CanHandleOfflineHelper -------
class AppCacheService::CanHandleOfflineHelper : AsyncHelper {
public:
CanHandleOfflineHelper(
AppCacheService* service, const GURL& url,
net::CompletionCallback* callback)
: AsyncHelper(service, callback), url_(url) {
}
virtual void Start() {
service_->storage()->FindResponseForMainRequest(url_, this);
}
private:
// AppCacheStorage::Delegate override
virtual void OnMainResponseFound(
const GURL& url, const AppCacheEntry& entry,
const GURL& fallback_url, const AppCacheEntry& fallback_entry,
int64 cache_id, const GURL& mainfest_url,
bool was_blocked_by_policy);
GURL url_;
DISALLOW_COPY_AND_ASSIGN(CanHandleOfflineHelper);
};
void AppCacheService::CanHandleOfflineHelper::OnMainResponseFound(
const GURL& url, const AppCacheEntry& entry,
const GURL& fallback_url, const AppCacheEntry& fallback_entry,
int64 cache_id, const GURL& mainfest_url,
bool was_blocked_by_policy) {
bool can = !was_blocked_by_policy &&
(entry.has_response_id() || fallback_entry.has_response_id());
CallCallback(can ? net::OK : net::ERR_FAILED);
delete this;
}
// DeleteHelper -------
class AppCacheService::DeleteHelper : public AsyncHelper {
public:
DeleteHelper(
AppCacheService* service, const GURL& manifest_url,
net::CompletionCallback* callback)
: AsyncHelper(service, callback), manifest_url_(manifest_url) {
}
virtual void Start() {
service_->storage()->LoadOrCreateGroup(manifest_url_, this);
}
private:
// AppCacheStorage::Delegate methods
virtual void OnGroupLoaded(
appcache::AppCacheGroup* group, const GURL& manifest_url);
virtual void OnGroupMadeObsolete(
appcache::AppCacheGroup* group, bool success);
GURL manifest_url_;
DISALLOW_COPY_AND_ASSIGN(DeleteHelper);
};
void AppCacheService::DeleteHelper::OnGroupLoaded(
appcache::AppCacheGroup* group, const GURL& manifest_url) {
if (group) {
group->set_being_deleted(true);
group->CancelUpdate();
service_->storage()->MakeGroupObsolete(group, this);
} else {
CallCallback(net::ERR_FAILED);
delete this;
}
}
void AppCacheService::DeleteHelper::OnGroupMadeObsolete(
appcache::AppCacheGroup* group, bool success) {
CallCallback(success ? net::OK : net::ERR_FAILED);
delete this;
}
// GetInfoHelper -------
class AppCacheService::GetInfoHelper : AsyncHelper {
public:
GetInfoHelper(
AppCacheService* service, AppCacheInfoCollection* collection,
net::CompletionCallback* callback)
: AsyncHelper(service, callback), collection_(collection) {
}
virtual void Start() {
service_->storage()->GetAllInfo(this);
}
private:
// AppCacheStorage::Delegate override
virtual void OnAllInfo(AppCacheInfoCollection* collection);
scoped_refptr<AppCacheInfoCollection> collection_;
DISALLOW_COPY_AND_ASSIGN(GetInfoHelper);
};
void AppCacheService::GetInfoHelper::OnAllInfo(
AppCacheInfoCollection* collection) {
if (collection)
collection->infos_by_origin.swap(collection_->infos_by_origin);
CallCallback(collection ? net::OK : net::ERR_FAILED);
delete this;
}
// AppCacheService -------
AppCacheService::AppCacheService()
: appcache_policy_(NULL), request_context_(NULL) {
}
AppCacheService::~AppCacheService() {
DCHECK(backends_.empty());
std::for_each(pending_helpers_.begin(),
pending_helpers_.end(),
std::mem_fun(&AsyncHelper::Cancel));
STLDeleteElements(&pending_helpers_);
}
void AppCacheService::Initialize(const FilePath& cache_directory,
base::MessageLoopProxy* cache_thread) {
DCHECK(!storage_.get());
AppCacheStorageImpl* storage = new AppCacheStorageImpl(this);
storage->Initialize(cache_directory, cache_thread);
storage_.reset(storage);
}
void AppCacheService::CanHandleMainResourceOffline(
const GURL& url,
net::CompletionCallback* callback) {
CanHandleOfflineHelper* helper =
new CanHandleOfflineHelper(this, url, callback);
helper->Start();
}
void AppCacheService::GetAllAppCacheInfo(AppCacheInfoCollection* collection,
net::CompletionCallback* callback) {
DCHECK(collection);
GetInfoHelper* helper = new GetInfoHelper(this, collection, callback);
helper->Start();
}
void AppCacheService::DeleteAppCacheGroup(const GURL& manifest_url,
net::CompletionCallback* callback) {
DeleteHelper* helper = new DeleteHelper(this, manifest_url, callback);
helper->Start();
}
void AppCacheService::set_special_storage_policy(
quota::SpecialStoragePolicy* policy) {
special_storage_policy_ = policy;
}
void AppCacheService::RegisterBackend(
AppCacheBackendImpl* backend_impl) {
DCHECK(backends_.find(backend_impl->process_id()) == backends_.end());
backends_.insert(
BackendMap::value_type(backend_impl->process_id(), backend_impl));
}
void AppCacheService::UnregisterBackend(
AppCacheBackendImpl* backend_impl) {
backends_.erase(backend_impl->process_id());
}
} // namespace appcache
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