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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/sandboxed_file_system_operation.h"
#include "net/url_request/url_request_context.h"
#include "webkit/fileapi/file_system_callback_dispatcher.h"
#include "webkit/fileapi/file_system_path_manager.h"
#include "webkit/fileapi/file_system_quota_manager.h"
#include "webkit/fileapi/sandboxed_file_system_context.h"
namespace fileapi {
SandboxedFileSystemOperation::SandboxedFileSystemOperation(
FileSystemCallbackDispatcher* dispatcher,
scoped_refptr<base::MessageLoopProxy> proxy,
scoped_refptr<SandboxedFileSystemContext> file_system_context)
: FileSystemOperation(dispatcher, proxy),
file_system_context_(file_system_context),
callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
DCHECK(file_system_context_);
}
SandboxedFileSystemOperation::~SandboxedFileSystemOperation() {}
void SandboxedFileSystemOperation::OpenFileSystem(
const GURL& origin_url, fileapi::FileSystemType type, bool create) {
#ifndef NDEBUG
DCHECK(kOperationNone == pending_operation_);
pending_operation_ = static_cast<FileSystemOperation::OperationType>(
kOperationOpenFileSystem);
#endif
file_system_context_->path_manager()->GetFileSystemRootPath(
origin_url, type, create,
callback_factory_.NewCallback(
&SandboxedFileSystemOperation::DidGetRootPath));
}
void SandboxedFileSystemOperation::CreateFile(
const FilePath& path, bool exclusive) {
if (!VerifyFileSystemPathForWrite(path, true /* create */, 0)) {
delete this;
return;
}
FileSystemOperation::CreateFile(path, exclusive);
}
void SandboxedFileSystemOperation::CreateDirectory(
const FilePath& path, bool exclusive, bool recursive) {
if (!VerifyFileSystemPathForWrite(path, true /* create */, 0)) {
delete this;
return;
}
FileSystemOperation::CreateDirectory(path, exclusive, recursive);
}
void SandboxedFileSystemOperation::Copy(
const FilePath& src_path, const FilePath& dest_path) {
if (!VerifyFileSystemPathForRead(src_path) ||
!VerifyFileSystemPathForWrite(dest_path, true /* create */,
FileSystemQuotaManager::kUnknownSize)) {
delete this;
return;
}
FileSystemOperation::Copy(src_path, dest_path);
}
void SandboxedFileSystemOperation::Move(
const FilePath& src_path, const FilePath& dest_path) {
if (!VerifyFileSystemPathForRead(src_path) ||
!VerifyFileSystemPathForWrite(dest_path, true /* create */,
FileSystemQuotaManager::kUnknownSize)) {
delete this;
return;
}
FileSystemOperation::Move(src_path, dest_path);
}
void SandboxedFileSystemOperation::DirectoryExists(const FilePath& path) {
if (!VerifyFileSystemPathForRead(path)) {
delete this;
return;
}
FileSystemOperation::DirectoryExists(path);
}
void SandboxedFileSystemOperation::FileExists(const FilePath& path) {
if (!VerifyFileSystemPathForRead(path)) {
delete this;
return;
}
FileSystemOperation::FileExists(path);
}
void SandboxedFileSystemOperation::GetMetadata(const FilePath& path) {
if (!VerifyFileSystemPathForRead(path)) {
delete this;
return;
}
FileSystemOperation::GetMetadata(path);
}
void SandboxedFileSystemOperation::ReadDirectory(const FilePath& path) {
if (!VerifyFileSystemPathForRead(path)) {
delete this;
return;
}
FileSystemOperation::ReadDirectory(path);
}
void SandboxedFileSystemOperation::Remove(
const FilePath& path, bool recursive) {
if (!VerifyFileSystemPathForWrite(path, false /* create */, 0)) {
delete this;
return;
}
FileSystemOperation::Remove(path, recursive);
}
void SandboxedFileSystemOperation::Write(
scoped_refptr<net::URLRequestContext> url_request_context,
const FilePath& path, const GURL& blob_url, int64 offset) {
if (!VerifyFileSystemPathForWrite(path, true /* create */,
FileSystemQuotaManager::kUnknownSize)) {
delete this;
return;
}
FileSystemOperation::Write(url_request_context, path, blob_url, offset);
}
void SandboxedFileSystemOperation::Truncate(
const FilePath& path, int64 length) {
if (!VerifyFileSystemPathForWrite(path, false /* create */, 0)) {
delete this;
return;
}
FileSystemOperation::Truncate(path, length);
}
void SandboxedFileSystemOperation::TouchFile(
const FilePath& path,
const base::Time& last_access_time,
const base::Time& last_modified_time) {
if (!VerifyFileSystemPathForWrite(path, true /* create */, 0)) {
delete this;
return;
}
FileSystemOperation::TouchFile(path, last_access_time, last_modified_time);
}
void SandboxedFileSystemOperation::DidGetRootPath(
bool success, const FilePath& path, const std::string& name) {
DCHECK(success || path.empty());
dispatcher()->DidOpenFileSystem(name, path);
delete this;
}
bool SandboxedFileSystemOperation::VerifyFileSystemPathForRead(
const FilePath& path) {
// We may want do more checks, but for now it just checks if the given
// |path| is under the valid FileSystem root path for this host context.
if (!file_system_context_->path_manager()->CrackFileSystemPath(
path, NULL, NULL, NULL)) {
dispatcher()->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
return false;
}
return true;
}
bool SandboxedFileSystemOperation::VerifyFileSystemPathForWrite(
const FilePath& path, bool create, int64 growth) {
GURL origin_url;
FilePath virtual_path;
if (!file_system_context_->path_manager()->CrackFileSystemPath(
path, &origin_url, NULL, &virtual_path)) {
dispatcher()->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
return false;
}
// Any write access is disallowed on the root path.
if (virtual_path.value().length() == 0 ||
virtual_path.DirName().value() == virtual_path.value()) {
dispatcher()->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
return false;
}
if (create && file_system_context_->path_manager()->IsRestrictedFileName(
path.BaseName())) {
dispatcher()->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
return false;
}
// TODO(kinuko): For operations with kUnknownSize we'll eventually
// need to resolve what amount of size it's going to write.
if (!file_system_context_->quota_manager()->CheckOriginQuota(
origin_url, growth)) {
dispatcher()->DidFail(base::PLATFORM_FILE_ERROR_NO_SPACE);
return false;
}
return true;
}
} // namespace fileapi
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