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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 <map>
#include <memory>
#include <vector>
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "build/build_config.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/file_chooser_params.h"
#include "net/base/directory_lister.h"
#include "ui/shell_dialogs/select_file_dialog.h"
class Profile;
namespace content {
struct FileChooserFileInfo;
class RenderViewHost;
class WebContents;
namespace ui {
struct SelectedFileInfo;
// This class handles file-selection requests coming from renderer processes.
// It implements both the initialisation and listener functions for
// file-selection dialogs.
// Since FileSelectHelper has-a NotificationRegistrar, it needs to live on and
// be destroyed on the UI thread. References to FileSelectHelper may be passed
// on to other threads.
class FileSelectHelper : public base::RefCountedThreadSafe<
public ui::SelectFileDialog::Listener,
public content::WebContentsObserver,
public content::NotificationObserver {
// Show the file chooser dialog.
static void RunFileChooser(content::RenderFrameHost* render_frame_host,
const content::FileChooserParams& params);
// Enumerates all the files in directory.
static void EnumerateDirectory(content::WebContents* tab,
int request_id,
const base::FilePath& path);
friend class base::RefCountedThreadSafe<FileSelectHelper>;
friend class base::DeleteHelper<FileSelectHelper>;
friend struct content::BrowserThread::DeleteOnThread<
FRIEND_TEST_ALL_PREFIXES(FileSelectHelperTest, IsAcceptTypeValid);
FRIEND_TEST_ALL_PREFIXES(FileSelectHelperTest, ZipPackage);
FRIEND_TEST_ALL_PREFIXES(FileSelectHelperTest, GetSanitizedFileName);
FRIEND_TEST_ALL_PREFIXES(FileSelectHelperTest, LastSelectedDirectory);
explicit FileSelectHelper(Profile* profile);
~FileSelectHelper() override;
// Utility class which can listen for directory lister events and relay
// them to the main object with the correct tracking id.
class DirectoryListerDispatchDelegate
: public net::DirectoryLister::DirectoryListerDelegate {
DirectoryListerDispatchDelegate(FileSelectHelper* parent, int id)
: parent_(parent),
id_(id) {}
~DirectoryListerDispatchDelegate() override {}
void OnListFile(
const net::DirectoryLister::DirectoryListerData& data) override;
void OnListDone(int error) override;
// This FileSelectHelper owns this object.
FileSelectHelper* parent_;
int id_;
void RunFileChooser(content::RenderFrameHost* render_frame_host,
std::unique_ptr<content::FileChooserParams> params);
void GetFileTypesInThreadPool(
std::unique_ptr<content::FileChooserParams> params);
void GetSanitizedFilenameOnUIThread(
std::unique_ptr<content::FileChooserParams> params);
void CheckDownloadRequestWithSafeBrowsing(
const base::FilePath& default_path,
std::unique_ptr<content::FileChooserParams> params);
void ProceedWithSafeBrowsingVerdict(
const base::FilePath& default_path,
std::unique_ptr<content::FileChooserParams> params,
bool allowed_by_safe_browsing);
void RunFileChooserOnUIThread(
const base::FilePath& default_path,
std::unique_ptr<content::FileChooserParams> params);
// Cleans up and releases this instance. This must be called after the last
// callback is received from the file chooser dialog.
void RunFileChooserEnd();
// SelectFileDialog::Listener overrides.
void FileSelected(const base::FilePath& path,
int index,
void* params) override;
void FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file,
int index,
void* params) override;
void MultiFilesSelected(const std::vector<base::FilePath>& files,
void* params) override;
void MultiFilesSelectedWithExtraInfo(
const std::vector<ui::SelectedFileInfo>& files,
void* params) override;
void FileSelectionCanceled(void* params) override;
// content::NotificationObserver overrides.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// content::WebContentsObserver overrides.
void RenderFrameHostChanged(content::RenderFrameHost* old_host,
content::RenderFrameHost* new_host) override;
void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
void WebContentsDestroyed() override;
void EnumerateDirectory(int request_id,
content::RenderViewHost* render_view_host,
const base::FilePath& path);
// Kicks off a new directory enumeration.
void StartNewEnumeration(const base::FilePath& path,
int request_id,
content::RenderViewHost* render_view_host);
// Callbacks from directory enumeration.
virtual void OnListFile(
int id,
const net::DirectoryLister::DirectoryListerData& data);
virtual void OnListDone(int id, int error);
// Cleans up and releases this instance. This must be called after the last
// callback is received from the enumeration code.
void EnumerateDirectoryEnd();
#if defined(OS_MACOSX)
// Must be called from a MayBlock() task. Each selected file that is a package
// will be zipped, and the zip will be passed to the render view host in place
// of the package.
void ProcessSelectedFilesMac(const std::vector<ui::SelectedFileInfo>& files);
// Saves the paths of |zipped_files| for later deletion. Passes |files| to the
// render view host.
void ProcessSelectedFilesMacOnUIThread(
const std::vector<ui::SelectedFileInfo>& files,
const std::vector<base::FilePath>& zipped_files);
// Zips the package at |path| into a temporary destination. Returns the
// temporary destination, if the zip was successful. Otherwise returns an
// empty path.
static base::FilePath ZipPackage(const base::FilePath& path);
#endif // defined(OS_MACOSX)
// Utility method that passes |files| to the RenderFrameHost, and ends the
// file chooser.
void NotifyRenderFrameHostAndEnd(
const std::vector<ui::SelectedFileInfo>& files);
// Sends the result to the render process, and call |RunFileChooserEnd|.
void NotifyRenderFrameHostAndEndAfterConversion(
const std::vector<content::FileChooserFileInfo>& list);
// Schedules the deletion of the files in |temporary_files_| and clears the
// vector.
void DeleteTemporaryFiles();
// Cleans up when the initiator of the file chooser is no longer valid.
void CleanUp();
// Calls RunFileChooserEnd() if the webcontents was destroyed. Returns true
// if the file chooser operation shouldn't proceed.
bool AbortIfWebContentsDestroyed();
// Helper method to get allowed extensions for select file dialog from
// the specified accept types as defined in the spec:
// |accept_types| contains only valid lowercased MIME types or file extensions
// beginning with a period (.).
static std::unique_ptr<ui::SelectFileDialog::FileTypeInfo>
GetFileTypesFromAcceptType(const std::vector<base::string16>& accept_types);
// Check the accept type is valid. It is expected to be all lower case with
// no whitespace.
static bool IsAcceptTypeValid(const std::string& accept_type);
// Get a sanitized filename suitable for use as a default filename. The
// suggested filename coming over the IPC may contain invalid characters or
// may result in a filename that's reserved on the current platform.
// If |suggested_path| is empty, the return value is also empty.
// If |suggested_path| is non-empty, but can't be safely converted to UTF-8,
// or is entirely lost during the sanitization process (e.g. because it
// consists entirely of invalid characters), it's replaced with a default
// filename.
// Otherwise, returns |suggested_path| with any invalid characters will be
// replaced with a suitable replacement character.
static base::FilePath GetSanitizedFileName(
const base::FilePath& suggested_path);
// Profile used to set/retrieve the last used directory.
Profile* profile_;
// The RenderFrameHost and WebContents for the page showing a file dialog
// (may only be one such dialog).
content::RenderFrameHost* render_frame_host_;
content::WebContents* web_contents_;
// Dialog box used for choosing files to upload from file form fields.
scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
std::unique_ptr<ui::SelectFileDialog::FileTypeInfo> select_file_types_;
// The type of file dialog last shown.
ui::SelectFileDialog::Type dialog_type_;
// The mode of file dialog last shown.
content::FileChooserParams::Mode dialog_mode_;
// Maintain a list of active directory enumerations. These could come from
// the file select dialog or from drag-and-drop of directories, so there could
// be more than one going on at a time.
struct ActiveDirectoryEnumeration;
std::map<int, ActiveDirectoryEnumeration*> directory_enumerations_;
// Registrar for notifications regarding our RenderViewHost.
content::NotificationRegistrar notification_registrar_;
// Temporary files only used on OSX. This class is responsible for deleting
// these files when they are no longer needed.
std::vector<base::FilePath> temporary_files_;