/mandos/release

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bzr branch http://bzr.recompile.se/loggerhead/mandos/release
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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from __future__ import division, absolute_import, with_statement
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import sys
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import signal
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import urwid.curses_display
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import urwid
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from dbus.mainloop.glib import DBusGMainLoop
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import gobject
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import dbus
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import UserList
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# Some useful constants
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domain = 'se.bsnet.fukt'
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server_interface = domain + '.Mandos'
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client_interface = domain + '.Mandos.Client'
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version = "1.0.14"
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# Always run in monochrome mode
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urwid.curses_display.curses.has_colors = lambda : False
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# Urwid doesn't support blinking, but we want it.  Since we have no
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# use for underline on its own, we make underline also always blink.
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urwid.curses_display.curses.A_UNDERLINE |= (
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    urwid.curses_display.curses.A_BLINK)
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class MandosClientPropertyCache(object):
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    """This wraps a Mandos Client D-Bus proxy object, caches the
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    properties and calls a hook function when any of them are
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    changed.
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    """
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    def __init__(self, proxy_object=None, properties=None, *args,
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                 **kwargs):
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        self.proxy = proxy_object # Mandos Client proxy object
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        if properties is None:
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            self.properties = dict()
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        else:
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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            self.properties = properties
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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        self.proxy.connect_to_signal("PropertyChanged",
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                                     self.property_changed,
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                                     client_interface,
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                                     byte_arrays=True)
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        if properties is None:
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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            self.properties.update(self.proxy.GetAll(client_interface,
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                                                     dbus_interface =
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                                                     dbus.PROPERTIES_IFACE))
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* mandos-monitor: New prototype version of interactive server
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        super(MandosClientPropertyCache, self).__init__(
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            proxy_object=proxy_object,
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            properties=properties, *args, **kwargs)
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    def property_changed(self, property=None, value=None):
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        """This is called whenever we get a PropertyChanged signal
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        It updates the changed property in the "properties" dict.
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        """
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        # Update properties dict with new value
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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        self.properties[property] = value
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* mandos-monitor: New prototype version of interactive server
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class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
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    """A Mandos Client which is visible on the screen.
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    """
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    def __init__(self, server_proxy_object=None, update_hook=None,
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                 delete_hook=None, *args, **kwargs):
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        # Called on update
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        self.update_hook = update_hook
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        # Called on delete
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        self.delete_hook = delete_hook
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        # Mandos Server proxy object
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        self.server_proxy_object = server_proxy_object
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        # The widget shown normally
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        self._text_widget = urwid.Text("")
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        # The widget shown when we have focus
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        self._focus_text_widget = urwid.Text("")
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        super(MandosClientWidget, self).__init__(
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            update_hook=update_hook, delete_hook=delete_hook,
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            *args, **kwargs)
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        self.update()
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        self.opened = False
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    def selectable(self):
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        """Make this a "selectable" widget.
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        This overrides the method from urwid.FlowWidget."""
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        return True
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    def rows(self, (maxcol,), focus=False):
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        """How many rows this widget will occupy might depend on
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        whether we have focus or not.
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        This overrides the method from urwid.FlowWidget"""
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        return self.current_widget(focus).rows((maxcol,), focus=focus)
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    def current_widget(self, focus=False):
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        if focus or self.opened:
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            return self._focus_widget
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        return self._widget
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    def update(self):
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        "Called when what is visible on the screen should be updated."
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        # How to add standout mode to a style
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        with_standout = { u"normal": u"standout",
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                          u"bold": u"bold-standout",
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                          u"underline-blink":
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                              u"underline-blink-standout",
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                          u"bold-underline-blink":
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                              u"bold-underline-blink-standout",
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                          }
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        # Rebuild focus and non-focus widgets using current properties
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        self._text = (u'name="%(name)s", enabled=%(enabled)s'
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                      % self.properties)
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        if not urwid.supports_unicode():
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            self._text = self._text.encode("ascii", "replace")
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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        textlist = [(u"normal", u"BLARGH: "), (u"bold", self._text)]
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* mandos-monitor: New prototype version of interactive server
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        self._text_widget.set_text(textlist)
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        self._focus_text_widget.set_text([(with_standout[text[0]],
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                                           text[1])
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                                          if isinstance(text, tuple)
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                                          else text
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                                          for text in textlist])
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        self._widget = self._text_widget
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        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
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                                            "standout")
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        # Run update hook, if any
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        if self.update_hook is not None:
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            self.update_hook()
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    def delete(self):
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        if self.delete_hook is not None:
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            self.delete_hook(self)
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    def render(self, (maxcol,), focus=False):
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        """Render differently if we have focus.
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        This overrides the method from urwid.FlowWidget"""
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        return self.current_widget(focus).render((maxcol,),
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                                                 focus=focus)
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    def keypress(self, (maxcol,), key):
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        """Handle keys.
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        This overrides the method from urwid.FlowWidget"""
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        if key == u"e" or key == u"+":
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            self.proxy.Enable()
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        elif key == u"d" or key == u"-":
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            self.proxy.Disable()
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        elif key == u"r" or key == u"_":
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            self.server_proxy_object.RemoveClient(self.proxy
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                                                  .object_path)
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        elif key == u"s":
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            self.proxy.StartChecker()
237.2.170 by Teddy Hogeborn
* mandos-monitor (MandosClientWidget): Change "StopChecker" key to "S"
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        elif key == u"S":
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* mandos-monitor: New prototype version of interactive server
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            self.proxy.StopChecker()
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* mandos-monitor (MandosClientWidget): Change "StopChecker" key to "S"
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        elif key == u"C":
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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            self.proxy.CheckedOK()
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        # xxx
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#         elif key == u"p" or key == "=":
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#             self.proxy.pause()
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#         elif key == u"u" or key == ":":
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#             self.proxy.unpause()
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#         elif key == u"RET":
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#             self.open()
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        else:
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            return key
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    def property_changed(self, property=None, value=None,
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                         *args, **kwargs):
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        """Call self.update() if old value is not new value.
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        This overrides the method from MandosClientPropertyCache"""
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        property_name = unicode(property)
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        old_value = self.properties.get(property_name)
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        super(MandosClientWidget, self).property_changed(
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            property=property, value=value, *args, **kwargs)
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        if self.properties.get(property_name) != old_value:
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            self.update()
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237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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class ConstrainedListBox(urwid.ListBox):
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    """Like a normal urwid.ListBox, but will consume all "up" or
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    "down" key presses, thus not allowing any containing widgets to
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    use them as an excuse to shift focus away from this widget.
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    """
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    def keypress(self, (maxcol, maxrow), key):
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        ret = super(ConstrainedListBox, self).keypress((maxcol, maxrow), key)
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        if ret in (u"up", u"down"):
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            return
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        return ret
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237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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class UserInterface(object):
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    """This is the entire user interface - the whole screen
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    with boxes, lists of client widgets, etc.
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    """
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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    def __init__(self, max_log_length=1000):
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        DBusGMainLoop(set_as_default=True)
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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        self.screen = urwid.curses_display.Screen()
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        self.screen.register_palette((
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                (u"normal",
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                 u"default", u"default", None),
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                (u"bold",
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                 u"default", u"default", u"bold"),
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                (u"underline-blink",
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                 u"default", u"default", u"underline"),
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                (u"standout",
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                 u"default", u"default", u"standout"),
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                (u"bold-underline-blink",
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                 u"default", u"default", (u"bold", u"underline")),
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                (u"bold-standout",
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                 u"default", u"default", (u"bold", u"standout")),
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                (u"underline-blink-standout",
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                 u"default", u"default", (u"underline", u"standout")),
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                (u"bold-underline-blink-standout",
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                 u"default", u"default", (u"bold", u"underline",
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                                          u"standout")),
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                ))
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237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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        if urwid.supports_unicode():
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            #self.divider = u"─" # \u2500
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            self.divider = u"━" # \u2501
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        else:
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            #self.divider = u"-" # \u002d
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            self.divider = u"_" # \u005f
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237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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        self.screen.start()
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        self.size = self.screen.get_cols_rows()
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        self.clients = urwid.SimpleListWalker([])
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        self.clients_dict = {}
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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        # We will add Text widgets to this list
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        self.log = []
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        self.max_log_length = max_log_length
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        # We keep a reference to the log widget so we can remove it
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        # from the ListWalker without it getting destroyed
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        self.logbox = ConstrainedListBox(self.log)
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        # This keeps track of whether self.uilist currently has
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        # self.logbox in it or not
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        self.log_visible = True
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        self.log_wrap = u"any"
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        self.rebuild()
237.2.170 by Teddy Hogeborn
* mandos-monitor (MandosClientWidget): Change "StopChecker" key to "S"
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        self.log_message((u"bold",
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                          u"Mandos Monitor version " + version))
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        self.log_message((u"bold",
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                          u"q: Quit  ?: Help"))
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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        self.busname = domain + '.Mandos'
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        self.main_loop = gobject.MainLoop()
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        self.bus = dbus.SystemBus()
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        mandos_dbus_objc = self.bus.get_object(
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            self.busname, u"/", follow_name_owner_changes=True)
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        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
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                                          dbus_interface
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                                          = server_interface)
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        try:
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            mandos_clients = (self.mandos_serv
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                              .GetAllClientsWithProperties())
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        except dbus.exceptions.DBusException:
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            mandos_clients = dbus.Dictionary()
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        (self.mandos_serv
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         .connect_to_signal("ClientRemoved",
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                            self.find_and_remove_client,
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                            dbus_interface=server_interface,
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                            byte_arrays=True))
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        (self.mandos_serv
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         .connect_to_signal("ClientAdded",
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                            self.add_new_client,
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                            dbus_interface=server_interface,
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                            byte_arrays=True))
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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        for path, client in mandos_clients.iteritems():
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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            client_proxy_object = self.bus.get_object(self.busname,
284
                                                      path)
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            self.add_client(MandosClientWidget(server_proxy_object
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                                               =self.mandos_serv,
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                                               proxy_object
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                                               =client_proxy_object,
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                                               properties=client,
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                                               update_hook
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                                               =self.refresh,
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                                               delete_hook
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                                               =self.remove_client),
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                            path=path)
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237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
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    def rebuild(self):
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        """This rebuilds the User Interface.
298
        Call this when the widget layout needs to change"""
299
        self.uilist = []
300
        #self.uilist.append(urwid.ListBox(self.clients))
301
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.clients),
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                                       #header=urwid.Divider(),
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                                       header=None,
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                                       footer=urwid.Divider(div_char=self.divider)))
305
        if self.log_visible:
306
            self.uilist.append(self.logbox)
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            pass
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        self.topwidget = urwid.Pile(self.uilist)
309
    
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    def log_message(self, markup):
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        """Add a log message to the log buffer."""
312
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
313
        if (self.max_log_length
314
            and len(self.log) > self.max_log_length):
315
            del self.log[0:len(self.log)-self.max_log_length-1]
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317
    def toggle_log_display(self):
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        """Toggle visibility of the log buffer."""
319
        self.log_visible = not self.log_visible
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        self.rebuild()
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        self.log_message(u"Log visibility changed to: "
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                         + unicode(self.log_visible))
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324
    def change_log_display(self):
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        """Change type of log display.
326
        Currently, this toggles wrapping of text lines."""
327
        if self.log_wrap == u"clip":
328
            self.log_wrap = u"any"
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        else:
330
            self.log_wrap = u"clip"
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        for textwidget in self.log:
332
            textwidget.set_wrap_mode(self.log_wrap)
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        self.log_message(u"Wrap mode: " + self.log_wrap)
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237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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    def find_and_remove_client(self, path, name):
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        """Find an client from its object path and remove it.
337
        
338
        This is connected to the ClientRemoved signal from the
339
        Mandos server object."""
340
        try:
341
            client = self.clients_dict[path]
342
        except KeyError:
343
            # not found?
344
            return
345
        self.remove_client(client, path)
346
    
347
    def add_new_client(self, path, properties):
348
        client_proxy_object = self.bus.get_object(self.busname, path)
349
        self.add_client(MandosClientWidget(server_proxy_object
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                                           =self.mandos_serv,
351
                                           proxy_object
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                                           =client_proxy_object,
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                                           properties=properties,
354
                                           update_hook
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                                           =self.refresh,
356
                                           delete_hook
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                                           =self.remove_client),
358
                        path=path)
359
    
360
    def add_client(self, client, path=None):
361
        self.clients.append(client)
362
        if path is None:
363
            path = client.proxy.object_path
364
        self.clients_dict[path] = client
365
        self.clients.sort(None, lambda c: c.properties[u"name"])
366
        self.refresh()
367
    
368
    def remove_client(self, client, path=None):
369
        self.clients.remove(client)
370
        if path is None:
371
            path = client.proxy.object_path
372
        del self.clients_dict[path]
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
373
        if not self.clients_dict:
374
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
375
            # is completely emptied, we need to recreate it.
376
            self.clients = urwid.SimpleListWalker([])
377
            self.rebuild()
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
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        self.refresh()
379
    
380
    def refresh(self):
381
        """Redraw the screen"""
382
        canvas = self.topwidget.render(self.size, focus=True)
383
        self.screen.draw_screen(self.size, canvas)
384
    
385
    def run(self):
386
        """Start the main loop and exit when it's done."""
387
        self.refresh()
388
        self._input_callback_tag = (gobject.io_add_watch
389
                                    (sys.stdin.fileno(),
390
                                     gobject.IO_IN,
391
                                     self.process_input))
392
        self.main_loop.run()
393
        # Main loop has finished, we should close everything now
394
        gobject.source_remove(self._input_callback_tag)
395
        self.screen.stop()
396
    
397
    def stop(self):
398
        self.main_loop.quit()
399
    
400
    def process_input(self, source, condition):
401
        keys = self.screen.get_input()
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
402
        translations = { u"ctrl n": u"down",      # Emacs
403
                         u"ctrl p": u"up",        # Emacs
404
                         u"ctrl v": u"page down", # Emacs
405
                         u"meta v": u"page up",   # Emacs
406
                         u" ": u"page down",      # less
407
                         u"f": u"page down",      # less
408
                         u"b": u"page up",        # less
409
                         u"j": u"down",           # vi
410
                         u"k": u"up",             # vi
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
411
                         }
412
        for key in keys:
413
            try:
414
                key = translations[key]
415
            except KeyError:    # :-)
416
                pass
417
            
418
            if key == u"q" or key == u"Q":
419
                self.stop()
420
                break
421
            elif key == u"window resize":
422
                self.size = self.screen.get_cols_rows()
423
                self.refresh()
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
424
            elif key == u"\f":  # Ctrl-L
425
                self.refresh()
426
            elif key == u"l" or key == u"D":
427
                self.toggle_log_display()
428
                self.refresh()
429
            elif key == u"w" or key == u"i":
430
                self.change_log_display()
431
                self.refresh()
432
            elif key == u"?" or key == u"f1":
237.2.170 by Teddy Hogeborn
* mandos-monitor (MandosClientWidget): Change "StopChecker" key to "S"
433
                if not self.log_visible:
434
                    self.log_visible = True
435
                    self.rebuild()
436
                self.log_message((u"bold",
437
                                  u"  ".join((u"q: Quit",
438
                                              u"?: Help",
439
                                              u"l: Log window toggle",
440
                                              u"TAB: Switch window",
441
                                              u"w: Wrap (log)"))))
442
                self.log_message((u"bold",
443
                                  u"  ".join((u"Clients:",
444
                                              u"e: Enable",
445
                                              u"d: Disable",
446
                                              u"r: Remove",
447
                                              u"s: Start new checker",
448
                                              u"S: Stop checker",
449
                                              u"C: Checker OK"))))
237.2.168 by Teddy Hogeborn
* mandos-monitor (MandosClientPropertyCache): Remove conversion of
450
                self.refresh()
451
            elif key == u"tab":
452
                if self.topwidget.get_focus() is self.logbox:
453
                    self.topwidget.set_focus(0)
454
                else:
455
                    self.topwidget.set_focus(self.logbox)
456
                self.refresh()
237.2.170 by Teddy Hogeborn
* mandos-monitor (MandosClientWidget): Change "StopChecker" key to "S"
457
            #elif (key == u"end" or key == u"meta >" or key == u"G"
458
            #      or key == u">"):
459
            #    pass            # xxx end-of-buffer
460
            #elif (key == u"home" or key == u"meta <" or key == u"g"
461
            #      or key == u"<"):
462
            #    pass            # xxx beginning-of-buffer
463
            #elif key == u"ctrl e" or key == u"$":
464
            #    pass            # xxx move-end-of-line
465
            #elif key == u"ctrl a" or key == u"^":
466
            #    pass            # xxx move-beginning-of-line
467
            #elif key == u"ctrl b" or key == u"meta (" or key == u"h":
468
            #    pass            # xxx left
469
            #elif key == u"ctrl f" or key == u"meta )" or key == u"l":
470
            #    pass            # xxx right
471
            #elif key == u"a":
472
            #    pass            # scroll up log
473
            #elif key == u"z":
474
            #    pass            # scroll down log
237.2.167 by Teddy Hogeborn
* mandos-monitor: New prototype version of interactive server
475
            elif self.topwidget.selectable():
476
                self.topwidget.keypress(self.size, key)
477
                self.refresh()
478
        return True
479
480
ui = UserInterface()
481
try:
482
    ui.run()
483
except:
484
    ui.screen.stop()
485
    raise