Beispiel #1
0
 def __init__(self, message, icon=QtWidgets.QMessageBox.NoIcon):
     super(Alert, self).__init__(None)
     self.setWindowTitle("OnionShare")
     self.setWindowIcon(QtGui.QIcon(helpers.get_resource_path("images/logo.png")))
     self.setText(message)
     self.setIcon(icon)
     self.exec_()
Beispiel #2
0
def main():
    """
    The main() function implements all of the logic that the GUI version of onionshare uses.
    """
    strings.load_strings(helpers)
    print(strings._('version_string').format(helpers.get_version()))

    # start the Qt app
    global qtapp
    qtapp = Application()

    # parse arguments
    parser = argparse.ArgumentParser()
    parser.add_argument('--local-only', action='store_true', dest='local_only', help=strings._("help_local_only"))
    parser.add_argument('--stay-open', action='store_true', dest='stay_open', help=strings._("help_stay_open"))
    parser.add_argument('--debug', action='store_true', dest='debug', help=strings._("help_debug"))
    parser.add_argument('--transparent', action='store_true', dest='transparent_torification', help=strings._("help_transparent_torification"))
    parser.add_argument('--filenames', metavar='filenames', nargs='+', help=strings._('help_filename'))
    args = parser.parse_args()

    filenames = args.filenames
    if filenames:
        for i in range(len(filenames)):
            filenames[i] = os.path.abspath(filenames[i])

    local_only = bool(args.local_only)
    stay_open = bool(args.stay_open)
    debug = bool(args.debug)
    transparent_torification = bool(args.transparent_torification)

    # create the onionshare icon
    global window_icon
    window_icon = QtGui.QIcon(helpers.get_resource_path('images/logo.png'))

    # validation
    if filenames:
        valid = True
        for filename in filenames:
            if not os.path.exists(filename):
                Alert(strings._("not_a_file", True).format(filename))
                valid = False
        if not valid:
            sys.exit()

    # start the onionshare app
    web.set_stay_open(stay_open)
    web.set_transparent_torification(transparent_torification)
    app = onionshare.OnionShare(debug, local_only, stay_open, transparent_torification)

    # clean up when app quits
    def shutdown():
        app.cleanup()
    qtapp.aboutToQuit.connect(shutdown)

    # launch the gui
    gui = OnionShareGui(qtapp, app)
    gui.send_files(filenames)

    # all done
    sys.exit(qtapp.exec_())
Beispiel #3
0
def main():
    """
    The main() function implements all of the logic that the GUI version of onionshare uses.
    """
    strings.load_strings()
    print(strings._('version_string').format(helpers.get_version()))

    # start the Qt app
    global qtapp
    qtapp = Application()

    # parse arguments
    parser = argparse.ArgumentParser()
    parser.add_argument('--local-only', action='store_true', dest='local_only', help=strings._("help_local_only"))
    parser.add_argument('--stay-open', action='store_true', dest='stay_open', help=strings._("help_stay_open"))
    parser.add_argument('--debug', action='store_true', dest='debug', help=strings._("help_debug"))
    parser.add_argument('--transparent', action='store_true', dest='transparent_torification', help=strings._("help_transparent_torification"))
    parser.add_argument('--filenames', metavar='filenames', nargs='+', help=strings._('help_filename'))
    args = parser.parse_args()

    filenames = args.filenames
    if filenames:
        for i in range(len(filenames)):
            filenames[i] = os.path.abspath(filenames[i])

    local_only = bool(args.local_only)
    stay_open = bool(args.stay_open)
    debug = bool(args.debug)
    transparent_torification = bool(args.transparent_torification)

    # create the onionshare icon
    global window_icon
    window_icon = QtGui.QIcon(helpers.get_resource_path('images/logo.png'))

    # validation
    if filenames:
        valid = True
        for filename in filenames:
            if not os.path.exists(filename):
                alert(strings._("not_a_file", True).format(filename))
                valid = False
        if not valid:
            sys.exit()

    # start the onionshare app
    web.set_stay_open(stay_open)
    web.set_transparent_torification(transparent_torification)
    app = onionshare.OnionShare(debug, local_only, stay_open, transparent_torification)

    # clean up when app quits
    def shutdown():
        app.cleanup()
    qtapp.aboutToQuit.connect(shutdown)

    # launch the gui
    gui = OnionShareGui(qtapp, app)
    gui.send_files(filenames)

    # all done
    sys.exit(qtapp.exec_())
Beispiel #4
0
    def __init__(self, qtapp, app, web, file_selection):
        super(ServerStatus, self).__init__()
        self.status = self.STATUS_STOPPED

        self.qtapp = qtapp
        self.app = app
        self.web = web
        self.file_selection = file_selection

        # server layout
        self.status_image_stopped = QtGui.QImage(
            helpers.get_resource_path('images/server_stopped.png'))
        self.status_image_working = QtGui.QImage(
            helpers.get_resource_path('images/server_working.png'))
        self.status_image_started = QtGui.QImage(
            helpers.get_resource_path('images/server_started.png'))
        self.status_image_label = QtWidgets.QLabel()
        self.status_image_label.setFixedWidth(30)
        self.server_button = QtWidgets.QPushButton()
        self.server_button.clicked.connect(self.server_button_clicked)
        server_layout = QtWidgets.QHBoxLayout()
        server_layout.addWidget(self.status_image_label)
        server_layout.addWidget(self.server_button)

        # url layout
        url_font = QtGui.QFont()
        self.url_label = QtWidgets.QLabel()
        self.url_label.setFont(url_font)
        self.url_label.setWordWrap(False)
        self.url_label.setAlignment(QtCore.Qt.AlignCenter)
        self.copy_url_button = QtWidgets.QPushButton(
            strings._('gui_copy_url', True))
        self.copy_url_button.clicked.connect(self.copy_url)
        self.copy_hidservauth_button = QtWidgets.QPushButton(
            strings._('gui_copy_hidservauth', True))
        self.copy_hidservauth_button.clicked.connect(self.copy_hidservauth)
        url_layout = QtWidgets.QHBoxLayout()
        url_layout.addWidget(self.url_label)
        url_layout.addWidget(self.copy_url_button)
        url_layout.addWidget(self.copy_hidservauth_button)

        # add the widgets
        self.addLayout(server_layout)
        self.addLayout(url_layout)

        self.update()
Beispiel #5
0
 def __init__(self, message, icon=QtWidgets.QMessageBox.NoIcon):
     super(Alert, self).__init__(None)
     self.setWindowTitle("OnionShare")
     self.setWindowIcon(
         QtGui.QIcon(helpers.get_resource_path('images/logo.png')))
     self.setText(message)
     self.setIcon(icon)
     self.exec_()
Beispiel #6
0
            def __init__(self, parent, image=False):
                self.parent = parent
                super(DropHereLabel, self).__init__(parent=parent)
                self.setAcceptDrops(True)
                self.setAlignment(QtCore.Qt.AlignCenter)

                if image:
                    self.setPixmap(QtGui.QPixmap.fromImage(QtGui.QImage(helpers.get_resource_path('images/drop_files.png'))))
                else:
                    self.setText(strings._('gui_drag_and_drop', True))
                    self.setStyleSheet('color: #999999;')

                self.hide()
Beispiel #7
0
    def __init__(self, qtapp, app, web, file_selection):
        super(ServerStatus, self).__init__()
        self.status = self.STATUS_STOPPED

        self.qtapp = qtapp
        self.app = app
        self.web = web
        self.file_selection = file_selection

        # server layout
        self.status_image_stopped = QtGui.QImage(helpers.get_resource_path("images/server_stopped.png"))
        self.status_image_working = QtGui.QImage(helpers.get_resource_path("images/server_working.png"))
        self.status_image_started = QtGui.QImage(helpers.get_resource_path("images/server_started.png"))
        self.status_image_label = QtWidgets.QLabel()
        self.status_image_label.setFixedWidth(30)
        self.server_button = QtWidgets.QPushButton()
        self.server_button.clicked.connect(self.server_button_clicked)
        server_layout = QtWidgets.QHBoxLayout()
        server_layout.addWidget(self.status_image_label)
        server_layout.addWidget(self.server_button)

        # url layout
        url_font = QtGui.QFont()
        self.url_label = QtWidgets.QLabel()
        self.url_label.setFont(url_font)
        self.url_label.setWordWrap(False)
        self.url_label.setAlignment(QtCore.Qt.AlignCenter)
        self.copy_url_button = QtWidgets.QPushButton(strings._("gui_copy_url", True))
        self.copy_url_button.clicked.connect(self.copy_url)
        url_layout = QtWidgets.QHBoxLayout()
        url_layout.addWidget(self.url_label)
        url_layout.addWidget(self.copy_url_button)

        # add the widgets
        self.addLayout(server_layout)
        self.addLayout(url_layout)

        self.update()
Beispiel #8
0
    def __init__(self, qtapp):
        super(SettingsDialog, self).__init__()
        self.qtapp = qtapp

        self.setModal(True)
        self.setWindowTitle(strings._('gui_settings_window_title', True))
        self.setWindowIcon(
            QtGui.QIcon(helpers.get_resource_path('images/logo.png')))

        system = platform.system()

        # Sharing options

        # Close after first download
        self.close_after_first_download_checkbox = QtWidgets.QCheckBox()
        self.close_after_first_download_checkbox.setCheckState(
            QtCore.Qt.Checked)
        self.close_after_first_download_checkbox.setText(
            strings._("gui_settings_close_after_first_download_option", True))

        # Sharing options layout
        sharing_group_layout = QtWidgets.QVBoxLayout()
        sharing_group_layout.addWidget(
            self.close_after_first_download_checkbox)
        sharing_group = QtWidgets.QGroupBox(
            strings._("gui_settings_sharing_label", True))
        sharing_group.setLayout(sharing_group_layout)

        # Stealth options

        # Stealth
        stealth_details = QtWidgets.QLabel(
            strings._("gui_settings_stealth_option_details", True))
        stealth_details.setWordWrap(True)
        self.stealth_checkbox = QtWidgets.QCheckBox()
        self.stealth_checkbox.setCheckState(QtCore.Qt.Unchecked)
        self.stealth_checkbox.setText(
            strings._("gui_settings_stealth_option", True))

        # Stealth options layout
        stealth_group_layout = QtWidgets.QVBoxLayout()
        stealth_group_layout.addWidget(stealth_details)
        stealth_group_layout.addWidget(self.stealth_checkbox)
        stealth_group = QtWidgets.QGroupBox(
            strings._("gui_settings_stealth_label", True))
        stealth_group.setLayout(stealth_group_layout)

        # Automatic updates options

        # Autoupdate
        self.autoupdate_checkbox = QtWidgets.QCheckBox()
        self.autoupdate_checkbox.setCheckState(QtCore.Qt.Unchecked)
        self.autoupdate_checkbox.setText(
            strings._("gui_settings_autoupdate_option", True))

        # Last update time
        self.autoupdate_timestamp = QtWidgets.QLabel()

        # Check for updates button
        self.check_for_updates_button = QtWidgets.QPushButton(
            strings._('gui_settings_autoupdate_check_button', True))
        self.check_for_updates_button.clicked.connect(self.check_for_updates)

        # Autoupdate options layout
        autoupdate_group_layout = QtWidgets.QVBoxLayout()
        autoupdate_group_layout.addWidget(self.autoupdate_checkbox)
        autoupdate_group_layout.addWidget(self.autoupdate_timestamp)
        autoupdate_group_layout.addWidget(self.check_for_updates_button)
        autoupdate_group = QtWidgets.QGroupBox(
            strings._("gui_settings_autoupdate_label", True))
        autoupdate_group.setLayout(autoupdate_group_layout)

        # Autoupdate is only available for Windows and Mac (Linux updates using package manager)
        if system != 'Windows' and system != 'Darwin':
            autoupdate_group.hide()

        # Connection type: either automatic, control port, or socket file

        # Bundled Tor
        self.connection_type_bundled_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_connection_type_bundled_option', True))
        self.connection_type_bundled_radio.toggled.connect(
            self.connection_type_bundled_toggled)

        # Bundled Tor doesn't work on dev mode in Windows or Mac
        if (system == 'Windows' or system == 'Darwin') and getattr(
                sys, 'onionshare_dev_mode', False):
            self.connection_type_bundled_radio.setEnabled(False)

        # Automatic
        self.connection_type_automatic_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_connection_type_automatic_option', True))
        self.connection_type_automatic_radio.toggled.connect(
            self.connection_type_automatic_toggled)

        # Control port
        self.connection_type_control_port_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_connection_type_control_port_option',
                      True))
        self.connection_type_control_port_radio.toggled.connect(
            self.connection_type_control_port_toggled)

        connection_type_control_port_extras_label = QtWidgets.QLabel(
            strings._('gui_settings_control_port_label', True))
        self.connection_type_control_port_extras_address = QtWidgets.QLineEdit(
        )
        self.connection_type_control_port_extras_port = QtWidgets.QLineEdit()
        connection_type_control_port_extras_layout = QtWidgets.QHBoxLayout()
        connection_type_control_port_extras_layout.addWidget(
            connection_type_control_port_extras_label)
        connection_type_control_port_extras_layout.addWidget(
            self.connection_type_control_port_extras_address)
        connection_type_control_port_extras_layout.addWidget(
            self.connection_type_control_port_extras_port)

        self.connection_type_control_port_extras = QtWidgets.QWidget()
        self.connection_type_control_port_extras.setLayout(
            connection_type_control_port_extras_layout)
        self.connection_type_control_port_extras.hide()

        # Socket file
        self.connection_type_socket_file_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_connection_type_socket_file_option', True))
        self.connection_type_socket_file_radio.toggled.connect(
            self.connection_type_socket_file_toggled)

        connection_type_socket_file_extras_label = QtWidgets.QLabel(
            strings._('gui_settings_socket_file_label', True))
        self.connection_type_socket_file_extras_path = QtWidgets.QLineEdit()
        connection_type_socket_file_extras_layout = QtWidgets.QHBoxLayout()
        connection_type_socket_file_extras_layout.addWidget(
            connection_type_socket_file_extras_label)
        connection_type_socket_file_extras_layout.addWidget(
            self.connection_type_socket_file_extras_path)

        self.connection_type_socket_file_extras = QtWidgets.QWidget()
        self.connection_type_socket_file_extras.setLayout(
            connection_type_socket_file_extras_layout)
        self.connection_type_socket_file_extras.hide()

        # Tor SOCKS address and port
        gui_settings_socks_label = QtWidgets.QLabel(
            strings._('gui_settings_socks_label', True))
        self.connection_type_socks_address = QtWidgets.QLineEdit()
        self.connection_type_socks_port = QtWidgets.QLineEdit()
        connection_type_socks_layout = QtWidgets.QHBoxLayout()
        connection_type_socks_layout.addWidget(gui_settings_socks_label)
        connection_type_socks_layout.addWidget(
            self.connection_type_socks_address)
        connection_type_socks_layout.addWidget(self.connection_type_socks_port)

        self.connection_type_socks = QtWidgets.QWidget()
        self.connection_type_socks.setLayout(connection_type_socks_layout)
        self.connection_type_socks.hide()

        # Authentication options

        # No authentication
        self.authenticate_no_auth_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_authenticate_no_auth_option', True))
        self.authenticate_no_auth_radio.toggled.connect(
            self.authenticate_no_auth_toggled)

        # Password
        self.authenticate_password_radio = QtWidgets.QRadioButton(
            strings._('gui_settings_authenticate_password_option', True))
        self.authenticate_password_radio.toggled.connect(
            self.authenticate_password_toggled)

        authenticate_password_extras_label = QtWidgets.QLabel(
            strings._('gui_settings_password_label', True))
        self.authenticate_password_extras_password = QtWidgets.QLineEdit('')
        authenticate_password_extras_layout = QtWidgets.QHBoxLayout()
        authenticate_password_extras_layout.addWidget(
            authenticate_password_extras_label)
        authenticate_password_extras_layout.addWidget(
            self.authenticate_password_extras_password)

        self.authenticate_password_extras = QtWidgets.QWidget()
        self.authenticate_password_extras.setLayout(
            authenticate_password_extras_layout)
        self.authenticate_password_extras.hide()

        # Authentication options layout
        authenticate_group_layout = QtWidgets.QVBoxLayout()
        authenticate_group_layout.addWidget(self.authenticate_no_auth_radio)
        authenticate_group_layout.addWidget(self.authenticate_password_radio)
        authenticate_group_layout.addWidget(self.authenticate_password_extras)
        self.authenticate_group = QtWidgets.QGroupBox(
            strings._("gui_settings_authenticate_label", True))
        self.authenticate_group.setLayout(authenticate_group_layout)

        # Test tor settings button
        self.connection_type_test_button = QtWidgets.QPushButton(
            strings._('gui_settings_connection_type_test_button', True))
        self.connection_type_test_button.clicked.connect(self.test_tor_clicked)

        # Connection type layout
        connection_type_group_layout = QtWidgets.QVBoxLayout()
        connection_type_group_layout.addWidget(
            self.connection_type_bundled_radio)
        connection_type_group_layout.addWidget(
            self.connection_type_automatic_radio)
        connection_type_group_layout.addWidget(
            self.connection_type_control_port_radio)
        connection_type_group_layout.addWidget(
            self.connection_type_socket_file_radio)
        connection_type_group_layout.addWidget(
            self.connection_type_control_port_extras)
        connection_type_group_layout.addWidget(
            self.connection_type_socket_file_extras)
        connection_type_group_layout.addWidget(self.connection_type_socks)
        connection_type_group_layout.addWidget(self.authenticate_group)
        connection_type_group_layout.addWidget(
            self.connection_type_test_button)
        connection_type_group = QtWidgets.QGroupBox(
            strings._("gui_settings_connection_type_label", True))
        connection_type_group.setLayout(connection_type_group_layout)

        # Buttons
        self.save_button = QtWidgets.QPushButton(
            strings._('gui_settings_button_save', True))
        self.save_button.clicked.connect(self.save_clicked)
        self.cancel_button = QtWidgets.QPushButton(
            strings._('gui_settings_button_cancel', True))
        self.cancel_button.clicked.connect(self.cancel_clicked)
        buttons_layout = QtWidgets.QHBoxLayout()
        buttons_layout.addWidget(self.save_button)
        buttons_layout.addWidget(self.cancel_button)

        # Tor network connection status
        self.tor_status = QtWidgets.QLabel()
        self.tor_status.setStyleSheet(
            'background-color: #ffffff; color: #000000; padding: 10px')
        self.tor_status.hide()

        # Layout
        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(sharing_group)
        layout.addWidget(stealth_group)
        layout.addWidget(autoupdate_group)
        layout.addWidget(connection_type_group)
        layout.addStretch()
        layout.addLayout(buttons_layout)
        layout.addWidget(self.tor_status)
        self.setLayout(layout)
        self.cancel_button.setFocus()

        # Load settings, and fill them in
        settings = Settings()
        settings.load()

        close_after_first_download = settings.get('close_after_first_download')
        if close_after_first_download:
            self.close_after_first_download_checkbox.setCheckState(
                QtCore.Qt.Checked)
        else:
            self.close_after_first_download_checkbox.setCheckState(
                QtCore.Qt.Unchecked)

        use_stealth = settings.get('use_stealth')
        if use_stealth:
            self.stealth_checkbox.setCheckState(QtCore.Qt.Checked)
        else:
            self.stealth_checkbox.setCheckState(QtCore.Qt.Unchecked)

        use_autoupdate = settings.get('use_autoupdate')
        if use_autoupdate:
            self.autoupdate_checkbox.setCheckState(QtCore.Qt.Checked)
        else:
            self.autoupdate_checkbox.setCheckState(QtCore.Qt.Unchecked)

        autoupdate_timestamp = settings.get('autoupdate_timestamp')
        self._update_autoupdate_timestamp(autoupdate_timestamp)

        connection_type = settings.get('connection_type')
        if connection_type == 'bundled':
            if self.connection_type_bundled_radio.isEnabled():
                self.connection_type_bundled_radio.setChecked(True)
            else:
                # If bundled tor is disabled, fallback to automatic
                self.connection_type_automatic_radio.setChecked(True)
        elif connection_type == 'automatic':
            self.connection_type_automatic_radio.setChecked(True)
        elif connection_type == 'control_port':
            self.connection_type_control_port_radio.setChecked(True)
        elif connection_type == 'socket_file':
            self.connection_type_socket_file_radio.setChecked(True)
        self.connection_type_control_port_extras_address.setText(
            settings.get('control_port_address'))
        self.connection_type_control_port_extras_port.setText(
            str(settings.get('control_port_port')))
        self.connection_type_socket_file_extras_path.setText(
            settings.get('socket_file_path'))
        self.connection_type_socks_address.setText(
            settings.get('socks_address'))
        self.connection_type_socks_port.setText(str(
            settings.get('socks_port')))
        auth_type = settings.get('auth_type')
        if auth_type == 'no_auth':
            self.authenticate_no_auth_radio.setChecked(True)
        elif auth_type == 'password':
            self.authenticate_password_radio.setChecked(True)
        self.authenticate_password_extras_password.setText(
            settings.get('auth_password'))

        # Show the dialog
        self.exec_()
Beispiel #9
0
    def __init__(self, qtapp, app, filenames):
        super(OnionShareGui, self).__init__()
        self.qtapp = qtapp
        self.app = app

        self.setWindowTitle('OnionShare')
        self.setWindowIcon(
            QtGui.QIcon(helpers.get_resource_path('images/logo.png')))

        # Menu bar
        self.setMenuBar(Menu(self.qtapp))

        # Check for updates in a new thread, if enabled
        system = platform.system()
        if system == 'Windows' or system == 'Darwin':
            settings = Settings()
            settings.load()
            if settings.get('use_autoupdate'):

                def update_available(update_url, installed_version,
                                     latest_version):
                    Alert(
                        strings._("update_available",
                                  True).format(update_url, installed_version,
                                               latest_version))

                t = UpdateThread()
                t.update_available.connect(update_available)
                t.start()

        # File selection
        self.file_selection = FileSelection()
        if filenames:
            for filename in filenames:
                self.file_selection.file_list.add_file(filename)

        # Server status
        self.server_status = ServerStatus(self.qtapp, self.app, web,
                                          self.file_selection)
        self.server_status.server_started.connect(
            self.file_selection.server_started)
        self.server_status.server_started.connect(self.start_server)
        self.server_status.server_stopped.connect(
            self.file_selection.server_stopped)
        self.server_status.server_stopped.connect(self.stop_server)
        self.start_server_finished.connect(self.clear_message)
        self.start_server_finished.connect(
            self.server_status.start_server_finished)
        self.stop_server_finished.connect(
            self.server_status.stop_server_finished)
        self.file_selection.file_list.files_updated.connect(
            self.server_status.update)
        self.server_status.url_copied.connect(self.copy_url)
        self.server_status.hidservauth_copied.connect(self.copy_hidservauth)
        self.starting_server_step2.connect(self.start_server_step2)
        self.starting_server_step3.connect(self.start_server_step3)
        self.starting_server_error.connect(self.start_server_error)

        # Filesize warning
        self.filesize_warning = QtWidgets.QLabel()
        self.filesize_warning.setStyleSheet(
            'padding: 10px 0; font-weight: bold; color: #333333;')
        self.filesize_warning.hide()

        # Downloads
        self.downloads = Downloads()
        self.downloads_container = QtWidgets.QScrollArea()
        self.downloads_container.setWidget(self.downloads)
        self.downloads_container.setWidgetResizable(True)
        self.downloads_container.setMaximumHeight(200)
        self.vbar = self.downloads_container.verticalScrollBar()
        self.downloads_container.hide()  # downloads start out hidden
        self.new_download = False

        # Status bar
        self.status_bar = QtWidgets.QStatusBar()
        self.status_bar.setSizeGripEnabled(False)
        version_label = QtWidgets.QLabel('v{0:s}'.format(
            helpers.get_version()))
        version_label.setStyleSheet('color: #666666; padding: 0 10px;')
        self.status_bar.addPermanentWidget(version_label)
        self.setStatusBar(self.status_bar)

        # Status bar, zip progress bar
        self._zip_progress_bar = None

        # Main layout
        self.layout = QtWidgets.QVBoxLayout()
        self.layout.addLayout(self.file_selection)
        self.layout.addLayout(self.server_status)
        self.layout.addWidget(self.filesize_warning)
        self.layout.addWidget(self.downloads_container)
        central_widget = QtWidgets.QWidget()
        central_widget.setLayout(self.layout)
        self.setCentralWidget(central_widget)
        self.show()

        # check for requests frequently
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.check_for_requests)
        self.timer.start(500)