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// Copyright (c) 2011 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/fileapi/file_system_usage_tracker.h"
#include <algorithm>
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop_proxy.h"
#include "base/task.h"
#include "googleurl/src/gurl.h"
#include "webkit/fileapi/file_system_path_manager.h"
#include "webkit/fileapi/file_system_usage_cache.h"
#include "webkit/fileapi/sandbox_mount_point_provider.h"
namespace fileapi {
class FileSystemUsageTracker::GetUsageTask
: public base::RefCountedThreadSafe<GetUsageTask> {
public:
GetUsageTask(
FileSystemUsageTracker* tracker,
scoped_refptr<base::MessageLoopProxy> file_message_loop,
std::string fs_identifier,
const FilePath& origin_base_path)
: tracker_(tracker),
file_message_loop_(file_message_loop),
original_message_loop_(
base::MessageLoopProxy::CreateForCurrentThread()),
fs_identifier_(fs_identifier),
fs_usage_(0),
origin_base_path_(origin_base_path) {
}
virtual ~GetUsageTask() {}
void Start() {
DCHECK(tracker_);
tracker_->RegisterUsageTask(this);
file_message_loop_->PostTask(
FROM_HERE, NewRunnableMethod(this, &GetUsageTask::RunOnFileThread));
}
void Cancel() {
DCHECK(original_message_loop_->BelongsToCurrentThread());
tracker_ = NULL;
}
private:
void RunOnFileThread() {
DCHECK(file_message_loop_->BelongsToCurrentThread());
if (!file_util::DirectoryExists(origin_base_path_))
fs_usage_ = 0;
else {
FilePath usage_file_path = origin_base_path_.AppendASCII(
FileSystemUsageCache::kUsageFileName);
fs_usage_ = FileSystemUsageCache::GetUsage(usage_file_path);
if (fs_usage_ < 0) {
FilePath content_file_path = origin_base_path_;
if (FileSystemUsageCache::Exists(usage_file_path))
FileSystemUsageCache::Delete(usage_file_path);
fs_usage_ = file_util::ComputeDirectorySize(content_file_path);
// fs_usage_ will include the size of .usage.
// The result of ComputeDirectorySize does not include it.
fs_usage_ += FileSystemUsageCache::kUsageFileSize;
FileSystemUsageCache::UpdateUsage(usage_file_path, fs_usage_);
}
}
original_message_loop_->PostTask(
FROM_HERE, NewRunnableMethod(this, &GetUsageTask::Completed));
}
void Completed() {
DCHECK(original_message_loop_->BelongsToCurrentThread());
if (tracker_) {
tracker_->UnregisterUsageTask(this);
tracker_->DidGetOriginUsage(fs_identifier_, fs_usage_);
}
}
FileSystemUsageTracker* tracker_;
scoped_refptr<base::MessageLoopProxy> file_message_loop_;
scoped_refptr<base::MessageLoopProxy> original_message_loop_;
std::string fs_identifier_;
int64 fs_usage_;
FilePath origin_base_path_;
};
FileSystemUsageTracker::FileSystemUsageTracker(
scoped_refptr<base::MessageLoopProxy> file_message_loop,
const FilePath& profile_path,
bool is_incognito)
: file_message_loop_(file_message_loop),
base_path_(profile_path.Append(
SandboxMountPointProvider::kFileSystemDirectory)),
is_incognito_(is_incognito) {
DCHECK(file_message_loop);
}
FileSystemUsageTracker::~FileSystemUsageTracker() {
std::for_each(running_usage_tasks_.begin(),
running_usage_tasks_.end(),
std::mem_fun(&GetUsageTask::Cancel));
}
void FileSystemUsageTracker::GetOriginUsage(
const GURL& origin_url,
fileapi::FileSystemType type,
GetUsageCallback* callback_ptr) {
DCHECK(callback_ptr);
scoped_ptr<GetUsageCallback> callback(callback_ptr);
if (is_incognito_) {
// We don't support FileSystem in incognito mode yet.
callback->Run(0);
return;
}
std::string origin_identifier =
SandboxMountPointProvider::GetOriginIdentifierFromURL(origin_url);
std::string type_string =
FileSystemPathManager::GetFileSystemTypeString(type);
std::string fs_identifier = origin_identifier + ":" + type_string;
if (pending_usage_callbacks_.find(fs_identifier) !=
pending_usage_callbacks_.end()) {
// Another get usage task is running. Add the callback to
// the pending queue and return.
pending_usage_callbacks_[fs_identifier].push_back(callback.release());
return;
}
// Get the filesystem base path (i.e. "FileSystem/<origin>/<type>",
// without unique part).
FilePath origin_base_path =
SandboxMountPointProvider::GetFileSystemBaseDirectoryForOriginAndType(
base_path_, origin_identifier, type);
if (origin_base_path.empty()) {
// The directory does not exist.
callback->Run(0);
return;
}
pending_usage_callbacks_[fs_identifier].push_back(callback.release());
scoped_refptr<GetUsageTask> task(
new GetUsageTask(this, file_message_loop_, fs_identifier,
origin_base_path));
task->Start();
}
void FileSystemUsageTracker::RegisterUsageTask(GetUsageTask* task) {
running_usage_tasks_.push_back(task);
}
void FileSystemUsageTracker::UnregisterUsageTask(GetUsageTask* task) {
DCHECK(running_usage_tasks_.front() == task);
running_usage_tasks_.pop_front();
}
void FileSystemUsageTracker::DidGetOriginUsage(
const std::string& fs_identifier, int64 usage) {
PendingUsageCallbackMap::iterator cb_list_iter =
pending_usage_callbacks_.find(fs_identifier);
DCHECK(cb_list_iter != pending_usage_callbacks_.end());
PendingCallbackList cb_list = cb_list_iter->second;
for (PendingCallbackList::iterator cb_iter = cb_list.begin();
cb_iter != cb_list.end();
++cb_iter) {
scoped_ptr<GetUsageCallback> callback(*cb_iter);
callback->Run(usage);
}
pending_usage_callbacks_.erase(cb_list_iter);
}
} // namespace fileapi
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