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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.
#include "chrome/browser/chromeos/file_manager/open_util.h"
#include <set>
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/chromeos/drive/file_system_util.h"
#include "chrome/browser/chromeos/file_manager/app_id.h"
#include "chrome/browser/chromeos/file_manager/file_tasks.h"
#include "chrome/browser/chromeos/file_manager/fileapi_util.h"
#include "chrome/browser/chromeos/file_manager/path_util.h"
#include "chrome/browser/chromeos/file_manager/url_util.h"
#include "chrome/browser/extensions/api/file_handlers/directory_util.h"
#include "chrome/browser/extensions/api/file_handlers/mime_util.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/user_metrics.h"
#include "extensions/browser/entry_info.h"
#include "storage/browser/fileapi/file_system_backend.h"
#include "storage/browser/fileapi/file_system_context.h"
#include "storage/browser/fileapi/file_system_operation_runner.h"
#include "storage/browser/fileapi/file_system_url.h"
using content::BrowserThread;
using storage::FileSystemURL;
namespace file_manager {
namespace util {
namespace {
bool shell_operations_allowed = true;
// Executes the |task| for the file specified by |url|.
void ExecuteFileTaskForUrl(Profile* profile,
const file_tasks::TaskDescriptor& task,
const GURL& url) {
if (!shell_operations_allowed)
return;
storage::FileSystemContext* file_system_context =
GetFileSystemContextForExtensionId(profile, kFileManagerAppId);
file_tasks::ExecuteFileTask(
profile,
GetFileManagerMainPageUrl(), // Executing task on behalf of Files.app.
task, std::vector<FileSystemURL>(1, file_system_context->CrackURL(url)),
file_tasks::FileTaskFinishedCallback());
}
// Opens the file manager for the specified |url|. Used to implement
// internal handlers of special action IDs:
//
// "open" - Open the file manager for the given folder.
// "select" - Open the file manager for the given file. The folder containing
// the file will be opened with the file selected.
void OpenFileManagerWithInternalActionId(Profile* profile,
const GURL& url,
const std::string& action_id) {
DCHECK(action_id == "open" || action_id == "select");
if (!shell_operations_allowed)
return;
content::RecordAction(base::UserMetricsAction("ShowFileBrowserFullTab"));
file_tasks::TaskDescriptor task(kFileManagerAppId,
file_tasks::TASK_TYPE_FILE_BROWSER_HANDLER,
action_id);
ExecuteFileTaskForUrl(profile, task, url);
}
// Opens the file with fetched MIME type and calls the callback.
void OpenFileWithMimeType(Profile* profile,
const base::FilePath& path,
const GURL& url,
const platform_util::OpenOperationCallback& callback,
const std::string& mime_type) {
std::vector<extensions::EntryInfo> entries;
entries.push_back(extensions::EntryInfo(path, mime_type, false));
std::vector<GURL> file_urls;
file_urls.push_back(url);
std::vector<file_tasks::FullTaskDescriptor> tasks;
file_tasks::FindAllTypesOfTasks(
profile, drive::util::GetDriveAppRegistryByProfile(profile), entries,
file_urls, &tasks);
// Select a default handler. If a default handler is not available, select
// a non-generic file handler.
const file_tasks::FullTaskDescriptor* chosen_task = nullptr;
for (const auto& task : tasks) {
if (!task.is_generic_file_handler()) {
chosen_task = &task;
if (task.is_default())
break;
}
}
if (chosen_task != nullptr) {
if (shell_operations_allowed)
ExecuteFileTaskForUrl(profile, chosen_task->task_descriptor(), url);
callback.Run(platform_util::OPEN_SUCCEEDED);
} else {
callback.Run(platform_util::OPEN_FAILED_NO_HANLDER_FOR_FILE_TYPE);
}
}
// Opens the file specified by |url| by finding and executing a file task for
// the file. Calls |callback| with the result.
void OpenFile(Profile* profile,
const base::FilePath& path,
const GURL& url,
const platform_util::OpenOperationCallback& callback) {
extensions::app_file_handler_util::GetMimeTypeForLocalPath(
profile, path,
base::Bind(&OpenFileWithMimeType, profile, path, url, callback));
}
void OpenItemWithMetadata(Profile* profile,
const base::FilePath& file_path,
const GURL& url,
platform_util::OpenItemType expected_type,
const platform_util::OpenOperationCallback& callback,
base::File::Error error,
const base::File::Info& file_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (error != base::File::FILE_OK) {
callback.Run(error == base::File::FILE_ERROR_NOT_FOUND
? platform_util::OPEN_FAILED_PATH_NOT_FOUND
: platform_util::OPEN_FAILED_FILE_ERROR);
return;
}
// Note that there exists a TOCTOU race between the time the metadata for
// |file_path| was determined and when it is opened based on the metadata.
if (expected_type == platform_util::OPEN_FOLDER && file_info.is_directory) {
OpenFileManagerWithInternalActionId(profile, url, "open");
callback.Run(platform_util::OPEN_SUCCEEDED);
return;
}
if (expected_type == platform_util::OPEN_FILE && !file_info.is_directory) {
OpenFile(profile, file_path, url, callback);
return;
}
callback.Run(platform_util::OPEN_FAILED_INVALID_TYPE);
}
} // namespace
void OpenItem(Profile* profile,
const base::FilePath& file_path,
platform_util::OpenItemType expected_type,
const platform_util::OpenOperationCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// This is unfortunately necessary as file browser handlers operate on URLs.
GURL url;
if (!ConvertAbsoluteFilePathToFileSystemUrl(profile, file_path,
kFileManagerAppId, &url)) {
callback.Run(platform_util::OPEN_FAILED_PATH_NOT_FOUND);
return;
}
GetMetadataForPath(
GetFileSystemContextForExtensionId(profile, kFileManagerAppId), file_path,
storage::FileSystemOperation::GET_METADATA_FIELD_IS_DIRECTORY,
base::Bind(&OpenItemWithMetadata, profile, file_path, url, expected_type,
callback));
}
void ShowItemInFolder(Profile* profile,
const base::FilePath& file_path,
const platform_util::OpenOperationCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
GURL url;
if (!ConvertAbsoluteFilePathToFileSystemUrl(profile, file_path,
kFileManagerAppId, &url)) {
callback.Run(platform_util::OPEN_FAILED_PATH_NOT_FOUND);
return;
}
// This action changes the selection so we do not reuse existing tabs.
OpenFileManagerWithInternalActionId(profile, url, "select");
callback.Run(platform_util::OPEN_SUCCEEDED);
}
void DisableShellOperationsForTesting() {
shell_operations_allowed = false;
}
} // namespace util
} // namespace file_manager
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