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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/extensions/file_manager/file_handler_util.h"
#include "base/bind.h"
#include "base/file_util.h"
#include "base/i18n/case_conversion.h"
#include "base/json/json_writer.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/chromeos/drive/file_system_util.h"
#include "chrome/browser/chromeos/drive/file_task_executor.h"
#include "chrome/browser/chromeos/extensions/file_manager/file_browser_handler.h"
#include "chrome/browser/chromeos/extensions/file_manager/file_manager_util.h"
#include "chrome/browser/extensions/event_router.h"
#include "chrome/browser/extensions/extension_host.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/browser/extensions/extension_tab_util.h"
#include "chrome/browser/extensions/lazy_background_task_queue.h"
#include "chrome/browser/extensions/platform_app_launcher.h"
#include "chrome/browser/prefs/scoped_user_pref_update.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/host_desktop.h"
#include "chrome/common/extensions/background_info.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_security_policy.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/web_contents.h"
#include "net/base/escape.h"
#include "webkit/browser/chromeos/fileapi/cros_mount_point_provider.h"
#include "webkit/browser/fileapi/file_system_context.h"
#include "webkit/browser/fileapi/file_system_url.h"
#include "webkit/browser/fileapi/isolated_context.h"
#include "webkit/common/fileapi/file_system_util.h"
using content::BrowserContext;
using content::BrowserThread;
using content::ChildProcessSecurityPolicy;
using content::SiteInstance;
using content::WebContents;
using extensions::Extension;
using fileapi::FileSystemURL;
namespace file_handler_util {
const char kTaskFile[] = "file";
const char kTaskDrive[] = "drive";
const char kTaskApp[] = "app";
namespace {
// Legacy Drive task extension prefix, used by CrackTaskID.
const char kDriveTaskExtensionPrefix[] = "drive-app:";
const size_t kDriveTaskExtensionPrefixLength =
arraysize(kDriveTaskExtensionPrefix) - 1;
const int kReadWriteFilePermissions = base::PLATFORM_FILE_OPEN |
base::PLATFORM_FILE_CREATE |
base::PLATFORM_FILE_OPEN_ALWAYS |
base::PLATFORM_FILE_CREATE_ALWAYS |
base::PLATFORM_FILE_OPEN_TRUNCATED |
base::PLATFORM_FILE_READ |
base::PLATFORM_FILE_WRITE |
base::PLATFORM_FILE_EXCLUSIVE_READ |
base::PLATFORM_FILE_EXCLUSIVE_WRITE |
base::PLATFORM_FILE_ASYNC |
base::PLATFORM_FILE_WRITE_ATTRIBUTES;
const int kReadOnlyFilePermissions = base::PLATFORM_FILE_OPEN |
base::PLATFORM_FILE_READ |
base::PLATFORM_FILE_EXCLUSIVE_READ |
base::PLATFORM_FILE_ASYNC;
// Returns process id of the process the extension is running in.
int ExtractProcessFromExtensionId(Profile* profile,
const std::string& extension_id) {
GURL extension_url =
Extension::GetBaseURLFromExtensionId(extension_id);
ExtensionProcessManager* manager =
extensions::ExtensionSystem::Get(profile)->process_manager();
SiteInstance* site_instance = manager->GetSiteInstanceForURL(extension_url);
if (!site_instance || !site_instance->HasProcess())
return -1;
content::RenderProcessHost* process = site_instance->GetProcess();
return process->GetID();
}
const FileBrowserHandler* FindFileBrowserHandler(const Extension* extension,
const std::string& action_id) {
FileBrowserHandler::List* handler_list =
FileBrowserHandler::GetHandlers(extension);
for (FileBrowserHandler::List::const_iterator action_iter =
handler_list->begin();
action_iter != handler_list->end();
++action_iter) {
if (action_iter->get()->id() == action_id)
return action_iter->get();
}
return NULL;
}
unsigned int GetAccessPermissionsForFileBrowserHandler(
const Extension* extension,
const std::string& action_id) {
const FileBrowserHandler* action =
FindFileBrowserHandler(extension, action_id);
if (!action)
return 0;
unsigned int result = 0;
if (action->CanRead())
result |= kReadOnlyFilePermissions;
if (action->CanWrite())
result |= kReadWriteFilePermissions;
// TODO(tbarzic): We don't handle Create yet.
return result;
}
std::string EscapedUtf8ToLower(const std::string& str) {
string16 utf16 = UTF8ToUTF16(
net::UnescapeURLComponent(str, net::UnescapeRule::NORMAL));
return net::EscapeUrlEncodedData(
UTF16ToUTF8(base::i18n::ToLower(utf16)),
false /* do not replace space with plus */);
}
bool GetFileBrowserHandlers(Profile* profile,
const GURL& selected_file_url,
FileBrowserHandlerList* results) {
ExtensionService* service =
extensions::ExtensionSystem::Get(profile)->extension_service();
if (!service)
return false; // In unit-tests, we may not have an ExtensionService.
// We need case-insensitive matching, and pattern in the handler is already
// in lower case.
const GURL lowercase_url(EscapedUtf8ToLower(selected_file_url.spec()));
for (ExtensionSet::const_iterator iter = service->extensions()->begin();
iter != service->extensions()->end();
++iter) {
const Extension* extension = *iter;
if (profile->IsOffTheRecord() &&
!service->IsIncognitoEnabled(extension->id()))
continue;
FileBrowserHandler::List* handler_list =
FileBrowserHandler::GetHandlers(extension);
if (!handler_list)
continue;
for (FileBrowserHandler::List::const_iterator action_iter =
handler_list->begin();
action_iter != handler_list->end();
++action_iter) {
const FileBrowserHandler* action = action_iter->get();
if (!action->MatchesURL(lowercase_url))
continue;
results->push_back(action_iter->get());
}
}
return true;
}
} // namespace
bool IsFallbackTask(const FileBrowserHandler* task) {
return (task->extension_id() == kFileBrowserDomain ||
task->extension_id() ==
extension_misc::kQuickOfficeComponentExtensionId ||
task->extension_id() == extension_misc::kQuickOfficeDevExtensionId ||
task->extension_id() == extension_misc::kQuickOfficeExtensionId);
}
void UpdateDefaultTask(Profile* profile,
const std::string& task_id,
const std::set<std::string>& suffixes,
const std::set<std::string>& mime_types) {
if (!profile || !profile->GetPrefs())
return;
if (!mime_types.empty()) {
DictionaryPrefUpdate mime_type_pref(profile->GetPrefs(),
prefs::kDefaultTasksByMimeType);
for (std::set<std::string>::const_iterator iter = mime_types.begin();
iter != mime_types.end(); ++iter) {
base::StringValue* value = new base::StringValue(task_id);
mime_type_pref->SetWithoutPathExpansion(*iter, value);
}
}
if (!suffixes.empty()) {
DictionaryPrefUpdate mime_type_pref(profile->GetPrefs(),
prefs::kDefaultTasksBySuffix);
for (std::set<std::string>::const_iterator iter = suffixes.begin();
iter != suffixes.end(); ++iter) {
base::StringValue* value = new base::StringValue(task_id);
// Suffixes are case insensitive.
std::string lower_suffix = StringToLowerASCII(*iter);
mime_type_pref->SetWithoutPathExpansion(lower_suffix, value);
}
}
}
std::string GetDefaultTaskIdFromPrefs(Profile* profile,
const std::string& mime_type,
const std::string& suffix) {
VLOG(1) << "Looking for default for MIME type: " << mime_type
<< " and suffix: " << suffix;
std::string task_id;
if (!mime_type.empty()) {
const DictionaryValue* mime_task_prefs =
profile->GetPrefs()->GetDictionary(prefs::kDefaultTasksByMimeType);
DCHECK(mime_task_prefs);
LOG_IF(ERROR, !mime_task_prefs) << "Unable to open MIME type prefs";
if (mime_task_prefs &&
mime_task_prefs->GetStringWithoutPathExpansion(mime_type, &task_id)) {
VLOG(1) << "Found MIME default handler: " << task_id;
return task_id;
}
}
const DictionaryValue* suffix_task_prefs =
profile->GetPrefs()->GetDictionary(prefs::kDefaultTasksBySuffix);
DCHECK(suffix_task_prefs);
LOG_IF(ERROR, !suffix_task_prefs) << "Unable to open suffix prefs";
std::string lower_suffix = StringToLowerASCII(suffix);
if (suffix_task_prefs)
suffix_task_prefs->GetStringWithoutPathExpansion(lower_suffix, &task_id);
VLOG_IF(1, !task_id.empty()) << "Found suffix default handler: " << task_id;
return task_id;
}
int GetReadWritePermissions() {
return kReadWriteFilePermissions;
}
int GetReadOnlyPermissions() {
return kReadOnlyFilePermissions;
}
std::string MakeTaskID(const std::string& extension_id,
const std::string& task_type,
const std::string& action_id) {
DCHECK(task_type == kTaskFile ||
task_type == kTaskDrive ||
task_type == kTaskApp);
return base::StringPrintf("%s|%s|%s",
extension_id.c_str(),
task_type.c_str(),
action_id.c_str());
}
// Breaks down task_id that is used between getFileTasks() and executeTask() on
// its building blocks. task_id field the following structure:
// <extension-id>|<task-type>|<task-action-id>
bool CrackTaskID(const std::string& task_id,
std::string* extension_id,
std::string* task_type,
std::string* action_id) {
std::vector<std::string> result;
int count = Tokenize(task_id, std::string("|"), &result);
// Parse historic task_id parameters that only contain two parts. Drive tasks
// are identified by a prefix "drive-app:" on the extension ID.
if (count == 2) {
if (StartsWithASCII(result[0], kDriveTaskExtensionPrefix, true)) {
if (task_type)
*task_type = kTaskDrive;
if (extension_id)
*extension_id = result[0].substr(kDriveTaskExtensionPrefixLength);
} else {
if (task_type)
*task_type = kTaskFile;
if (extension_id)
*extension_id = result[0];
}
if (action_id)
*action_id = result[1];
return true;
}
if (count != 3)
return false;
if (extension_id)
*extension_id = result[0];
if (task_type) {
*task_type = result[1];
DCHECK(*task_type == kTaskFile ||
*task_type == kTaskDrive ||
*task_type == kTaskApp);
}
if (action_id)
*action_id = result[2];
return true;
}
// Find a specific handler in the handler list.
FileBrowserHandlerList::iterator FindHandler(
FileBrowserHandlerList* handler_list,
const std::string& extension_id,
const std::string& id) {
FileBrowserHandlerList::iterator iter = handler_list->begin();
while (iter != handler_list->end() &&
!((*iter)->extension_id() == extension_id &&
(*iter)->id() == id)) {
++iter;
}
return iter;
}
// Given the list of selected files, returns array of file action tasks
// that are shared between them.
void FindDefaultTasks(Profile* profile,
const std::vector<base::FilePath>& files_list,
const FileBrowserHandlerList& common_tasks,
FileBrowserHandlerList* default_tasks) {
DCHECK(default_tasks);
default_tasks->clear();
std::set<std::string> default_ids;
for (std::vector<base::FilePath>::const_iterator it = files_list.begin();
it != files_list.end(); ++it) {
std::string task_id = file_handler_util::GetDefaultTaskIdFromPrefs(
profile, "", it->Extension());
if (!task_id.empty())
default_ids.insert(task_id);
}
const FileBrowserHandler* fallback_task = NULL;
// Convert the default task IDs collected above to one of the handler pointers
// from common_tasks.
for (FileBrowserHandlerList::const_iterator task_iter = common_tasks.begin();
task_iter != common_tasks.end(); ++task_iter) {
std::string task_id = MakeTaskID((*task_iter)->extension_id(), kTaskFile,
(*task_iter)->id());
std::set<std::string>::iterator default_iter = default_ids.find(task_id);
if (default_iter != default_ids.end()) {
default_tasks->push_back(*task_iter);
continue;
}
// Remember the first fallback task.
if (!fallback_task && IsFallbackTask(*task_iter))
fallback_task = *task_iter;
}
// If there are no default tasks found, use fallback as default.
if (fallback_task && default_tasks->empty())
default_tasks->push_back(fallback_task);
}
// Given the list of selected files, returns array of context menu tasks
// that are shared
bool FindCommonTasks(Profile* profile,
const std::vector<GURL>& files_list,
FileBrowserHandlerList* common_tasks) {
DCHECK(common_tasks);
common_tasks->clear();
FileBrowserHandlerList common_task_list;
std::set<std::string> default_task_ids;
for (std::vector<GURL>::const_iterator it = files_list.begin();
it != files_list.end(); ++it) {
FileBrowserHandlerList file_actions;
if (!GetFileBrowserHandlers(profile, *it, &file_actions))
return false;
// If there is nothing to do for one file, the intersection of tasks for all
// files will be empty at the end, and so will the default tasks.
if (file_actions.empty())
return true;
// For the very first file, just copy all the elements.
if (it == files_list.begin()) {
common_task_list = file_actions;
} else {
// For all additional files, find intersection between the accumulated and
// file specific set.
FileBrowserHandlerList intersection;
std::set_intersection(common_task_list.begin(), common_task_list.end(),
file_actions.begin(), file_actions.end(),
std::back_inserter(intersection));
common_task_list = intersection;
if (common_task_list.empty())
return true;
}
}
FileBrowserHandlerList::iterator watch_iter = FindHandler(
&common_task_list, kFileBrowserDomain, kFileBrowserWatchTaskId);
FileBrowserHandlerList::iterator gallery_iter = FindHandler(
&common_task_list, kFileBrowserDomain, kFileBrowserGalleryTaskId);
if (watch_iter != common_task_list.end() &&
gallery_iter != common_task_list.end()) {
// Both "watch" and "gallery" actions are applicable which means that the
// selection is all videos. Showing them both is confusing, so we only keep
// the one that makes more sense ("watch" for single selection, "gallery"
// for multiple selection).
if (files_list.size() == 1)
common_task_list.erase(gallery_iter);
else
common_task_list.erase(watch_iter);
}
common_tasks->swap(common_task_list);
return true;
}
bool GetTaskForURLAndPath(Profile* profile,
const GURL& url,
const base::FilePath& file_path,
const FileBrowserHandler** handler) {
std::vector<GURL> file_urls;
file_urls.push_back(url);
FileBrowserHandlerList default_tasks;
FileBrowserHandlerList common_tasks;
if (!FindCommonTasks(profile, file_urls, &common_tasks))
return false;
if (common_tasks.empty())
return false;
std::vector<base::FilePath> file_paths;
file_paths.push_back(file_path);
FindDefaultTasks(profile, file_paths, common_tasks, &default_tasks);
// If there's none, or more than one, then we don't have a canonical default.
if (!default_tasks.empty()) {
// There should not be multiple default tasks for a single URL.
DCHECK_EQ(1u, default_tasks.size());
*handler = *default_tasks.begin();
return true;
}
// If there are no default tasks, use first task in the list (file manager
// does the same in this situation).
// TODO(tbarzic): This is so not optimal behaviour.
*handler = *common_tasks.begin();
return true;
}
class ExtensionTaskExecutor : public FileTaskExecutor {
public:
// FileTaskExecutor overrides.
virtual bool ExecuteAndNotify(const std::vector<FileSystemURL>& file_urls,
const FileTaskFinishedCallback& done) OVERRIDE;
private:
// FileTaskExecutor is the only class allowed to create one.
friend class FileTaskExecutor;
ExtensionTaskExecutor(Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
int32 tab_id,
const std::string& extension_id,
const std::string& action_id);
virtual ~ExtensionTaskExecutor();
struct FileDefinition {
FileDefinition();
~FileDefinition();
base::FilePath virtual_path;
base::FilePath absolute_path;
bool is_directory;
};
typedef std::vector<FileDefinition> FileDefinitionList;
class ExecuteTasksFileSystemCallbackDispatcher;
void ExecuteDoneOnUIThread(bool success);
void ExecuteFileActionsOnUIThread(const std::string& file_system_name,
const GURL& file_system_root,
const FileDefinitionList& file_list,
int handler_pid);
void SetupPermissionsAndDispatchEvent(const std::string& file_system_name,
const GURL& file_system_root,
const FileDefinitionList& file_list,
int handler_pid_in,
extensions::ExtensionHost* host);
// Registers file permissions from |handler_host_permissions_| with
// ChildProcessSecurityPolicy for process with id |handler_pid|.
void SetupHandlerHostFileAccessPermissions(
const FileDefinitionList& file_list,
const Extension* extension,
int handler_pid);
int32 tab_id_;
const std::string action_id_;
FileTaskFinishedCallback done_;
};
class AppTaskExecutor : public FileTaskExecutor {
public:
// FileTaskExecutor overrides.
virtual bool ExecuteAndNotify(const std::vector<FileSystemURL>& file_urls,
const FileTaskFinishedCallback& done) OVERRIDE;
private:
// FileTaskExecutor is the only class allowed to create one.
friend class FileTaskExecutor;
AppTaskExecutor(Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
const std::string& extension_id,
const std::string& action_id);
virtual ~AppTaskExecutor();
const std::string extension_id_;
const std::string action_id_;
};
// static
FileTaskExecutor* FileTaskExecutor::Create(Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
int32 tab_id,
const std::string& extension_id,
const std::string& task_type,
const std::string& action_id) {
if (task_type == kTaskFile)
return new ExtensionTaskExecutor(profile,
source_url,
file_browser_id,
tab_id,
extension_id,
action_id);
if (task_type == kTaskDrive)
return new drive::FileTaskExecutor(profile,
extension_id, // really app_id
action_id);
if (task_type == kTaskApp)
return new AppTaskExecutor(profile,
source_url,
file_browser_id,
extension_id,
action_id);
NOTREACHED();
return NULL;
}
FileTaskExecutor::FileTaskExecutor(Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
const std::string& extension_id)
: profile_(profile),
source_url_(source_url),
file_browser_id_(file_browser_id),
extension_id_(extension_id) {
}
FileTaskExecutor::~FileTaskExecutor() {
}
bool FileTaskExecutor::Execute(const std::vector<FileSystemURL>& file_urls) {
return ExecuteAndNotify(file_urls, FileTaskFinishedCallback());
}
bool FileTaskExecutor::FileBrowserHasAccessPermissionForFiles(
const std::vector<FileSystemURL>& files) {
// Check if the file browser extension has permissions for the files in its
// file system context.
GURL site = extensions::ExtensionSystem::Get(profile())->extension_service()->
GetSiteForExtensionId(file_browser_id_);
fileapi::ExternalFileSystemMountPointProvider* external_provider =
BrowserContext::GetStoragePartitionForSite(profile(), site)->
GetFileSystemContext()->external_provider();
if (!external_provider)
return false;
for (size_t i = 0; i < files.size(); ++i) {
// Make sure this url really being used by the right caller extension.
if (source_url_.GetOrigin() != files[i].origin())
return false;
if (!chromeos::CrosMountPointProvider::CanHandleURL(files[i]) ||
!external_provider->IsAccessAllowed(files[i])) {
return false;
}
}
return true;
}
// TODO(kaznacheev): Remove this method and inline its implementation at the
// only place where it is used (FileTaskExecutor::OnAppAuthorized)
Browser* FileTaskExecutor::GetBrowser() const {
return chrome::FindOrCreateTabbedBrowser(
profile_ ? profile_ : ProfileManager::GetDefaultProfileOrOffTheRecord(),
chrome::HOST_DESKTOP_TYPE_ASH);
}
const Extension* FileTaskExecutor::GetExtension() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
ExtensionService* service =
extensions::ExtensionSystem::Get(profile())->extension_service();
return service ? service->GetExtensionById(extension_id_, false) :
NULL;
}
ExtensionTaskExecutor::FileDefinition::FileDefinition() : is_directory(false) {
}
ExtensionTaskExecutor::FileDefinition::~FileDefinition() {
}
class ExtensionTaskExecutor::ExecuteTasksFileSystemCallbackDispatcher {
public:
static fileapi::FileSystemContext::OpenFileSystemCallback CreateCallback(
ExtensionTaskExecutor* executor,
scoped_refptr<fileapi::FileSystemContext> file_system_context_handler,
scoped_refptr<const Extension> handler_extension,
int handler_pid,
const std::string& action_id,
const std::vector<FileSystemURL>& file_urls) {
return base::Bind(
&ExecuteTasksFileSystemCallbackDispatcher::DidOpenFileSystem,
base::Owned(new ExecuteTasksFileSystemCallbackDispatcher(
executor, file_system_context_handler, handler_extension,
handler_pid, action_id, file_urls)));
}
void DidOpenFileSystem(base::PlatformFileError result,
const std::string& file_system_name,
const GURL& file_system_root) {
if (result != base::PLATFORM_FILE_OK) {
DidFail(result);
return;
}
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
ExtensionTaskExecutor::FileDefinitionList file_list;
for (std::vector<FileSystemURL>::iterator iter = urls_.begin();
iter != urls_.end();
++iter) {
// Set up file permission access.
ExtensionTaskExecutor::FileDefinition file;
if (!SetupFileAccessPermissions(*iter, &file))
continue;
file_list.push_back(file);
}
if (file_list.empty()) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(
&ExtensionTaskExecutor::ExecuteDoneOnUIThread,
executor_,
false));
return;
}
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(
&ExtensionTaskExecutor::ExecuteFileActionsOnUIThread,
executor_,
file_system_name,
file_system_root,
file_list,
handler_pid_));
}
void DidFail(base::PlatformFileError error_code) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(
&ExtensionTaskExecutor::ExecuteDoneOnUIThread,
executor_,
false));
}
private:
ExecuteTasksFileSystemCallbackDispatcher(
ExtensionTaskExecutor* executor,
scoped_refptr<fileapi::FileSystemContext> file_system_context_handler,
const scoped_refptr<const Extension>& handler_extension,
int handler_pid,
const std::string& action_id,
const std::vector<FileSystemURL>& file_urls)
: executor_(executor),
file_system_context_handler_(file_system_context_handler),
handler_extension_(handler_extension),
handler_pid_(handler_pid),
action_id_(action_id),
urls_(file_urls) {
DCHECK(executor_);
}
// Checks legitimacy of file url and grants file RO access permissions from
// handler (target) extension and its renderer process.
bool SetupFileAccessPermissions(const FileSystemURL& url,
FileDefinition* file) {
if (!handler_extension_.get())
return false;
if (handler_pid_ == 0)
return false;
fileapi::ExternalFileSystemMountPointProvider* external_provider_handler =
file_system_context_handler_->external_provider();
// Check if this file system entry exists first.
base::PlatformFileInfo file_info;
base::FilePath local_path = url.path();
base::FilePath virtual_path = url.virtual_path();
bool is_drive_file = url.type() == fileapi::kFileSystemTypeDrive;
DCHECK(!is_drive_file || drive::util::IsUnderDriveMountPoint(local_path));
// If the file is under gdata mount point, there is no actual file to be
// found on the url.path().
if (!is_drive_file) {
if (!file_util::PathExists(local_path) ||
file_util::IsLink(local_path) ||
!file_util::GetFileInfo(local_path, &file_info)) {
return false;
}
}
// Grant access to this particular file to target extension. This will
// ensure that the target extension can access only this FS entry and
// prevent from traversing FS hierarchy upward.
external_provider_handler->GrantFileAccessToExtension(
handler_extension_->id(), virtual_path);
// Output values.
file->virtual_path = virtual_path;
file->is_directory = file_info.is_directory;
file->absolute_path = local_path;
return true;
}
scoped_refptr<ExtensionTaskExecutor> executor_;
scoped_refptr<fileapi::FileSystemContext> file_system_context_handler_;
scoped_refptr<const Extension> handler_extension_;
int handler_pid_;
std::string action_id_;
std::vector<FileSystemURL> urls_;
DISALLOW_COPY_AND_ASSIGN(ExecuteTasksFileSystemCallbackDispatcher);
};
ExtensionTaskExecutor::ExtensionTaskExecutor(
Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
int tab_id,
const std::string& extension_id,
const std::string& action_id)
: FileTaskExecutor(profile, source_url, file_browser_id, extension_id),
tab_id_(tab_id),
action_id_(action_id) {
}
ExtensionTaskExecutor::~ExtensionTaskExecutor() {}
bool ExtensionTaskExecutor::ExecuteAndNotify(
const std::vector<FileSystemURL>& file_urls,
const FileTaskFinishedCallback& done) {
if (!FileBrowserHasAccessPermissionForFiles(file_urls))
return false;
// Find the target extension.
scoped_refptr<const Extension> extension = GetExtension();
if (!extension.get())
return false;
// Forbid calling undeclared handlers.
if (!FindFileBrowserHandler(extension, action_id_))
return false;
int extension_pid = ExtractProcessFromExtensionId(profile(), extension->id());
if (extension_pid <= 0) {
if (!extensions::BackgroundInfo::HasLazyBackgroundPage(extension))
return false;
}
done_ = done;
// Get file system context for the extension to which onExecute event will be
// send. The file access permissions will be granted to the extension in the
// file system context for the files in |file_urls|.
GURL site = extensions::ExtensionSystem::Get(profile())->extension_service()->
GetSiteForExtensionId(extension->id());
scoped_refptr<fileapi::FileSystemContext> file_system_context_handler =
BrowserContext::GetStoragePartitionForSite(profile(), site)->
GetFileSystemContext();
GURL origin_url =
Extension::GetBaseURLFromExtensionId(extension->id()).GetOrigin();
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(&fileapi::FileSystemContext::OpenFileSystem,
file_system_context_handler,
origin_url, fileapi::kFileSystemTypeExternal,
fileapi::OPEN_FILE_SYSTEM_FAIL_IF_NONEXISTENT,
ExecuteTasksFileSystemCallbackDispatcher::CreateCallback(
this,
file_system_context_handler,
extension,
extension_pid,
action_id_,
file_urls)));
return true;
}
void ExtensionTaskExecutor::ExecuteDoneOnUIThread(bool success) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!done_.is_null())
done_.Run(success);
done_.Reset();
}
void ExtensionTaskExecutor::ExecuteFileActionsOnUIThread(
const std::string& file_system_name,
const GURL& file_system_root,
const FileDefinitionList& file_list,
int handler_pid) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
const Extension* extension = GetExtension();
if (!extension) {
ExecuteDoneOnUIThread(false);
return;
}
if (handler_pid > 0) {
SetupPermissionsAndDispatchEvent(file_system_name, file_system_root,
file_list, handler_pid, NULL);
} else {
// We have to wake the handler background page before we proceed.
extensions::LazyBackgroundTaskQueue* queue =
extensions::ExtensionSystem::Get(profile())->
lazy_background_task_queue();
if (!queue->ShouldEnqueueTask(profile(), extension)) {
ExecuteDoneOnUIThread(false);
return;
}
queue->AddPendingTask(
profile(), extension_id(),
base::Bind(&ExtensionTaskExecutor::SetupPermissionsAndDispatchEvent,
this, file_system_name, file_system_root, file_list,
handler_pid));
}
}
void ExtensionTaskExecutor::SetupPermissionsAndDispatchEvent(
const std::string& file_system_name,
const GURL& file_system_root,
const FileDefinitionList& file_list,
int handler_pid_in,
extensions::ExtensionHost* host) {
int handler_pid = host ? host->render_process_host()->GetID() :
handler_pid_in;
if (handler_pid <= 0) {
ExecuteDoneOnUIThread(false);
return;
}
extensions::EventRouter* event_router =
extensions::ExtensionSystem::Get(profile())->event_router();
if (!event_router) {
ExecuteDoneOnUIThread(false);
return;
}
const Extension* extension = GetExtension();
if (!extension) {
ExecuteDoneOnUIThread(false);
return;
}
SetupHandlerHostFileAccessPermissions(file_list, extension, handler_pid);
scoped_ptr<ListValue> event_args(new ListValue());
event_args->Append(new base::StringValue(action_id_));
DictionaryValue* details = new DictionaryValue();
event_args->Append(details);
// Get file definitions. These will be replaced with Entry instances by
// dispatchEvent() method from event_binding.js.
ListValue* files_urls = new ListValue();
details->Set("entries", files_urls);
for (FileDefinitionList::const_iterator iter = file_list.begin();
iter != file_list.end();
++iter) {
DictionaryValue* file_def = new DictionaryValue();
files_urls->Append(file_def);
file_def->SetString("fileSystemName", file_system_name);
file_def->SetString("fileSystemRoot", file_system_root.spec());
base::FilePath root(FILE_PATH_LITERAL("/"));
base::FilePath full_path = root.Append(iter->virtual_path);
file_def->SetString("fileFullPath", full_path.value());
file_def->SetBoolean("fileIsDirectory", iter->is_directory);
}
details->SetInteger("tab_id", tab_id_);
scoped_ptr<extensions::Event> event(new extensions::Event(
"fileBrowserHandler.onExecute", event_args.Pass()));
event->restrict_to_profile = profile();
event_router->DispatchEventToExtension(extension_id(), event.Pass());
ExecuteDoneOnUIThread(true);
}
void ExtensionTaskExecutor::SetupHandlerHostFileAccessPermissions(
const FileDefinitionList& file_list,
const Extension* extension,
int handler_pid) {
for (FileDefinitionList::const_iterator iter = file_list.begin();
iter != file_list.end();
++iter) {
content::ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile(
handler_pid,
iter->absolute_path,
GetAccessPermissionsForFileBrowserHandler(extension, action_id_));
}
}
AppTaskExecutor::AppTaskExecutor(
Profile* profile,
const GURL& source_url,
const std::string& file_browser_id,
const std::string& extension_id,
const std::string& action_id)
: FileTaskExecutor(profile, source_url, file_browser_id, extension_id),
action_id_(action_id) {
}
AppTaskExecutor::~AppTaskExecutor() {}
bool AppTaskExecutor::ExecuteAndNotify(
const std::vector<FileSystemURL>& file_urls,
const FileTaskFinishedCallback& done) {
if (!FileBrowserHasAccessPermissionForFiles(file_urls))
return false;
for (size_t i = 0; i != file_urls.size(); ++i) {
extensions::LaunchPlatformAppWithFileHandler(profile(), GetExtension(),
action_id_, file_urls[i].path());
}
if (!done.is_null())
done.Run(true);
return true;
}
} // namespace file_handler_util
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