589 lines
20 KiB
Python
589 lines
20 KiB
Python
import avahi
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import sys, os
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sys.path.insert(0, os.path.abspath("../../"))
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from sugar import util
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import dbus, dbus.service
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import random
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import logging
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import gobject
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def compose_service_name(name, activity_id):
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if type(name) == type(""):
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name = unicode(name)
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if not name:
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raise ValueError("name must be a valid string.")
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if not activity_id:
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return name
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if type(name) != type(u""):
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raise ValueError("name must be in unicode.")
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composed = "%s [%s]" % (name, activity_id)
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return composed
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def decompose_service_name(name):
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"""Break a service name into the name and activity ID, if we can."""
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if type(name) != type(u""):
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raise ValueError("name must be a valid unicode string.")
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name_len = len(name)
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if name_len < util.ACTIVITY_ID_LEN + 5:
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return (None, name)
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# check for activity id end marker
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if name[name_len - 1] != "]":
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return (None, name)
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start = name_len - 1 - util.ACTIVITY_ID_LEN
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end = name_len - 1
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# check for activity id start marker
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if name[start - 1] != "[" or name[start - 2] != " ":
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return (None, name)
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activity_id = name[start:end]
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if not util.validate_activity_id(activity_id):
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return (None, name)
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return (activity_id, name[:start - 2])
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def _one_dict_differs(dict1, dict2):
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diff_keys = []
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for key, value in dict1.items():
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if not dict2.has_key(key) or dict2[key] != value:
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diff_keys.append(key)
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return diff_keys
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def _dicts_differ(dict1, dict2):
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diff_keys = []
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diff1 = _one_dict_differs(dict1, dict2)
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diff2 = _one_dict_differs(dict2, dict1)
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for key in diff2:
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if key not in diff1:
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diff_keys.append(key)
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diff_keys += diff1
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return diff_keys
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def _convert_properties_to_dbus_byte_array(props):
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# Ensure properties are converted to ByteArray types
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# because python sometimes can't figure that out
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info = dbus.Array([], signature="aay")
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for k, v in props.items():
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info.append(dbus.types.ByteArray("%s=%s" % (k, v)))
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return info
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_ACTIVITY_ID_TAG = "ActivityID"
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SERVICE_DBUS_INTERFACE = "org.laptop.Presence.Service"
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SERVICE_DBUS_OBJECT_PATH = "/org/laptop/Presence/Services/"
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class ServiceDBusHelper(dbus.service.Object):
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"""Handle dbus requests and signals for Service objects"""
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def __init__(self, parent, bus_name, object_path):
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self._parent = parent
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self._bus_name = bus_name
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self._object_path = object_path
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dbus.service.Object.__init__(self, bus_name, self._object_path)
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@dbus.service.signal(SERVICE_DBUS_INTERFACE,
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signature="as")
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def PublishedValueChanged(self, keylist):
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pass
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@dbus.service.method(SERVICE_DBUS_INTERFACE,
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in_signature="", out_signature="a{sv}")
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def getProperties(self):
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"""Return service properties."""
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pary = {}
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pary['name'] = self._parent.get_name()
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pary['type'] = self._parent.get_type()
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pary['domain'] = self._parent.get_domain()
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actid = self._parent.get_activity_id()
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if actid:
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pary['activityId'] = actid
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port = self._parent.get_port()
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if port:
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pary['port'] = self._parent.get_port()
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addr = self._parent.get_address()
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if addr:
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pary['address'] = addr
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source_addr = self._parent.get_source_address()
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if source_addr:
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pary['sourceAddress'] = source_addr
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return pary
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@dbus.service.method(SERVICE_DBUS_INTERFACE,
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in_signature="s")
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def getPublishedValue(self, key):
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"""Return the value belonging to the requested key from the
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service's TXT records."""
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val = self._parent.get_one_property(key)
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if not val:
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raise KeyError("Value was not found.")
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return val
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@dbus.service.method(SERVICE_DBUS_INTERFACE,
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in_signature="", out_signature="a{sv}")
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def getPublishedValues(self):
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pary = {}
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props = self._parent.get_properties()
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for key, value in props.items():
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pary[key] = str(value)
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return dbus.Dictionary(pary)
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@dbus.service.method(SERVICE_DBUS_INTERFACE,
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sender_keyword="sender")
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def setPublishedValue(self, key, value, sender):
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self._parent.set_property(key, value, sender)
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@dbus.service.method(SERVICE_DBUS_INTERFACE,
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in_signature="a{sv}", sender_keyword="sender")
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def setPublishedValues(self, values, sender):
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if not self._parent.is_local():
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raise ValueError("Service was not not registered by requesting process!")
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self._parent.set_properties(values, sender)
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class Service(gobject.GObject):
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"""Encapsulates information about a specific ZeroConf/mDNS
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service as advertised on the network."""
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__gsignals__ = {
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'property-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self, bus_name, object_id, name, stype, domain=u"local",
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address=None, port=-1, properties=None, source_address=None,
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local_publisher=None):
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gobject.GObject.__init__(self)
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if not bus_name:
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raise ValueError("DBus bus name must be valid")
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if not object_id or type(object_id) != type(1):
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raise ValueError("object id must be a valid number")
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# Validate immutable options
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if name and type(name) != type(u""):
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raise ValueError("name must be unicode.")
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if not name or not len(name):
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raise ValueError("must specify a valid service name.")
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if stype and type(stype) != type(u""):
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raise ValueError("service type must be in unicode.")
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if not stype or not len(stype):
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raise ValueError("must specify a valid service type.")
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if not stype.endswith("._tcp") and not stype.endswith("._udp"):
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raise ValueError("must specify a TCP or UDP service type.")
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if type(domain) != type(u""):
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raise ValueError("domain must be in unicode.")
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if domain and domain != "local":
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raise ValueError("must use the 'local' domain (for now).")
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# ID of the D-Bus connection that published this service, if any.
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# We only let the local publisher modify the service.
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self._local_publisher = local_publisher
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self._avahi_entry_group = None
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(actid, real_name) = decompose_service_name(name)
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self._name = real_name
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self._full_name = name
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self._stype = stype
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self._domain = domain
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self._port = -1
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self.set_port(port)
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self._properties = {}
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self._dbus_helper = None
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self._internal_set_properties(properties)
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# Source address is the unicast source IP
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self._source_address = None
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if source_address is not None:
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self.set_source_address(source_address)
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# Address is the published address, could be multicast or unicast
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self._address = None
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if self._properties.has_key('address'):
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self.set_address(self._properties['address'])
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elif address is not None:
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self.set_address(address)
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self._properties['address'] = address
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# Ensure that an ActivityID tag, if given, matches
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# what we expect from the service type
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if self._properties.has_key(_ACTIVITY_ID_TAG):
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prop_actid = self._properties[_ACTIVITY_ID_TAG]
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if (prop_actid and not actid) or (prop_actid != actid):
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raise ValueError("ActivityID property specified, but the " \
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"service names's activity ID didn't match it: %s," \
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" %s" % (prop_actid, actid))
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self._activity_id = actid
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if actid and not self._properties.has_key(_ACTIVITY_ID_TAG):
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self._properties[_ACTIVITY_ID_TAG] = actid
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self._owner = None
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# register ourselves with dbus
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self._object_id = object_id
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self._object_path = SERVICE_DBUS_OBJECT_PATH + str(self._object_id)
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self._dbus_helper = ServiceDBusHelper(self, bus_name, self._object_path)
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def object_path(self):
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return dbus.ObjectPath(self._object_path)
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def get_owner(self):
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return self._owner
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def set_owner(self, owner):
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if self._owner is not None:
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raise RuntimeError("Can only set a service's owner once")
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self._owner = owner
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def is_local(self):
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if self._local_publisher is not None:
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return True
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return False
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def get_name(self):
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"""Return the service's name, usually that of the
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buddy who provides it."""
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return self._name
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def get_full_name(self):
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return self._full_name
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def get_one_property(self, key):
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"""Return one property of the service, or None
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if the property was not found. Cannot distinguish
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between lack of a property, and a property value that
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actually is None."""
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if key in self._properties.keys():
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return self._properties[key]
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return None
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def get_properties(self):
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"""Return a python dictionary of all the service's
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properties."""
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return self._properties
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def __emit_properties_changed_signal(self, keys):
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if self._dbus_helper:
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self._dbus_helper.PublishedValueChanged(keys)
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self.emit('property-changed', keys)
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def set_property(self, key, value, sender=None):
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"""Set one service property"""
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if not self._local_publisher:
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raise ValueError("Service was not not registered by requesting process!")
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if sender is not None and self._local_publisher != sender:
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raise ValueError("Service was not not registered by requesting process!")
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if type(key) != type(u""):
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raise ValueError("Key must be a unicode string.")
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if type(value) != type(u"") and type(value) != type(True):
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raise ValueError("Key must be a unicode string or a boolean.")
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# Ignore setting the key to it's current value
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if self._properties.has_key(key):
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if self._properties[key] == value:
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return
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# Blank value means remove key
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remove = False
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if type(value) == type(u"") and len(value) == 0:
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remove = True
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if type(value) == type(False) and value == False:
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remove = True
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if remove:
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# If the key wasn't present, return without error
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if self._properties.has_key(key):
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del self._properties[key]
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else:
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# Otherwise set it
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if type(value) == type(True):
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value = ""
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self._properties[key] = value
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# if the service is locally published already, update the TXT records
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if self._local_publisher and self._avahi_entry_group:
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self.__internal_update_avahi_properties()
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self.__emit_properties_changed_signal([key])
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def set_properties(self, properties, sender=None, from_network=False):
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"""Set all service properties in one call"""
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if sender is not None and self._local_publisher != sender:
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raise ValueError("Service was not not registered by requesting process!")
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self._internal_set_properties(properties, from_network)
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def _internal_set_properties(self, properties, from_network=False):
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"""Set the service's properties from either an Avahi
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TXT record (a list of lists of integers), or a
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python dictionary."""
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if type(properties) != type({}):
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raise ValueError("Properties must be a dictionary.")
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# Make sure the properties are actually different
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diff_keys = _dicts_differ(self._properties, properties)
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if len(diff_keys) == 0:
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return
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self._properties = {}
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# Set key/value pairs on internal property list
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for key, value in properties.items():
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if len(key) == 0:
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continue
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tmp_key = key
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tmp_val = value
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if type(tmp_key) != type(u""):
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tmp_key = unicode(tmp_key)
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if type(tmp_val) != type(u""):
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tmp_val = unicode(tmp_val)
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self._properties[tmp_key] = tmp_val
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# if the service is locally published already, update the TXT records
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if self._local_publisher and self._avahi_entry_group and not from_network:
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self.__internal_update_avahi_properties()
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self.__emit_properties_changed_signal(diff_keys)
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def __internal_update_avahi_properties(self):
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info = _convert_properties_to_dbus_byte_array(self._properties)
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self._avahi_entry_group.UpdateServiceTxt(avahi.IF_UNSPEC,
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avahi.PROTO_UNSPEC, 0,
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dbus.String(self._full_name), dbus.String(self._stype),
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dbus.String(self._domain), info)
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def get_type(self):
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"""Return the service's service type."""
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return self._stype
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def get_activity_id(self):
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"""Return the activity ID this service is associated with, if any."""
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return self._activity_id
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def get_port(self):
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return self._port
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def set_port(self, port):
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if type(port) != type(1) or (port <= 1024 and port > 65536):
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raise ValueError("must specify a valid port number between 1024 and 65536.")
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self._port = port
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def get_source_address(self):
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return self._source_address
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def set_source_address(self, address):
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if not address or type(address) != type(u""):
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raise ValueError("address must be unicode")
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self._source_address = address
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def get_address(self):
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return self._address
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def set_address(self, address):
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if not address or type(address) != type(u""):
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raise ValueError("address must be a unicode string")
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self._address = address
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self._properties['address'] = address
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def get_domain(self):
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"""Return the ZeroConf/mDNS domain the service was found in."""
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return self._domain
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def register(self, system_bus, avahi_service):
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if self._avahi_entry_group is not None:
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raise RuntimeError("Service already registered!")
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obj = system_bus.get_object(avahi.DBUS_NAME, avahi_service.EntryGroupNew())
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self._avahi_entry_group = dbus.Interface(obj, avahi.DBUS_INTERFACE_ENTRY_GROUP)
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info = _convert_properties_to_dbus_byte_array(self._properties)
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logging.debug("Will register service with name='%s', stype='%s'," \
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" domain='%s', address='%s', port=%d, info='%s'" % (self._full_name,
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self._stype, self._domain, self._address, self._port, info))
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try:
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self._avahi_entry_group.AddService(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, 0,
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dbus.String(self._full_name), dbus.String(self._stype),
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dbus.String(self._domain), dbus.String(""), # let Avahi figure the 'host' out
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dbus.UInt16(self._port), info)
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except dbus.DBusException, exc:
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# Local name collision and stuff
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pass
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self._avahi_entry_group.connect_to_signal('StateChanged', self.__entry_group_changed_cb)
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self._avahi_entry_group.Commit()
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def __entry_group_changed_cb(self, state, error):
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pass
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# logging.debug("** %s.%s Entry group changed: state %s, error %s" % (self._full_name, self._stype, state, error))
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def unregister(self, sender):
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# Refuse to unregister if we can't get the dbus connection this request
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# came from for some reason
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if not sender:
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raise RuntimeError("Service registration request must have a sender.")
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if not self._local_publisher:
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raise ValueError("Service was not a local service provided by this laptop!")
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if sender is not None and self._local_publisher != sender:
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raise ValueError("Service was not registered by requesting process!")
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if not self._avahi_entry_group:
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raise ValueError("Service was not registered by requesting process!")
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self._avahi_entry_group.Free()
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del self._avahi_entry_group
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self._avahi_entry_group = None
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#################################################################
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# Tests
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#################################################################
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import unittest
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__objid_seq = 0
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def _next_objid():
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global __objid_seq
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__objid_seq = __objid_seq + 1
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return __objid_seq
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class ServiceTestCase(unittest.TestCase):
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_DEF_NAME = u"foobar"
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_DEF_STYPE = u"_foo._bar._tcp"
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_DEF_DOMAIN = u"local"
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_DEF_ADDRESS = u"1.1.1.1"
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_DEF_PORT = 1234
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_DEF_PROPS = {'foobar': 'baz'}
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_STR_TEST_ARGS = [None, 0, [], {}]
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def __init__(self, name):
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self._bus = dbus.SessionBus()
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self._bus_name = dbus.service.BusName('org.laptop.Presence', bus=self._bus)
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unittest.TestCase.__init__(self, name)
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def __del__(self):
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del self._bus_name
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del self._bus
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def _test_init_fail(self, name, stype, domain, address, port, properties, fail_msg):
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"""Test something we expect to fail."""
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try:
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objid = _next_objid()
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service = Service(self._bus_name, objid, name, stype, domain, address,
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port, properties)
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except ValueError, exc:
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pass
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else:
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self.fail("expected a ValueError for %s." % fail_msg)
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def testName(self):
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for item in self._STR_TEST_ARGS:
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self._test_init_fail(item, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
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self._DEF_PORT, self._DEF_PROPS, "invalid name")
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def testType(self):
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for item in self._STR_TEST_ARGS:
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self._test_init_fail(self._DEF_NAME, item, self._DEF_DOMAIN, self._DEF_ADDRESS,
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self._DEF_PORT, self._DEF_PROPS, "invalid service type")
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self._test_init_fail(self._DEF_NAME, u"_bork._foobar", self._DEF_DOMAIN, self._DEF_ADDRESS,
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self._DEF_PORT, self._DEF_PROPS, "invalid service type")
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def testDomain(self):
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for item in self._STR_TEST_ARGS:
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self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, item, self._DEF_ADDRESS,
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self._DEF_PORT, self._DEF_PROPS, "invalid domain")
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# Only accept local for now
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self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, u"foobar", self._DEF_ADDRESS,
|
|
self._DEF_PORT, self._DEF_PROPS, "invalid domain")
|
|
# Make sure "" works
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, self._DEF_NAME, self._DEF_STYPE, u"",
|
|
self._DEF_ADDRESS, self._DEF_PORT, self._DEF_PROPS)
|
|
assert service, "Empty domain was not accepted!"
|
|
|
|
def testAddress(self):
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, [],
|
|
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, {},
|
|
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, 1234,
|
|
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
|
|
|
def testPort(self):
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
|
[], self._DEF_PROPS, "invalid port")
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
|
{}, self._DEF_PROPS, "invalid port")
|
|
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
|
"adf", self._DEF_PROPS, "invalid port")
|
|
|
|
def testGoodInit(self):
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN,
|
|
self._DEF_ADDRESS, self._DEF_PORT, self._DEF_PROPS)
|
|
assert service.get_name() == self._DEF_NAME, "service name wasn't correct after init."
|
|
assert service.get_type() == self._DEF_STYPE, "service type wasn't correct after init."
|
|
assert service.get_domain() == "local", "service domain wasn't correct after init."
|
|
assert service.get_address() == self._DEF_ADDRESS, "service address wasn't correct after init."
|
|
assert service.get_port() == self._DEF_PORT, "service port wasn't correct after init."
|
|
assert service.object_path() == SERVICE_DBUS_OBJECT_PATH + str(objid)
|
|
value = service.get_one_property('foobar')
|
|
assert value and value == 'baz', "service property wasn't correct after init."
|
|
|
|
def testAvahiProperties(self):
|
|
props = [[111, 114, 103, 46, 102, 114, 101, 101, 100, 101, 115, 107, 116, 111, 112, 46, 65, 118, 97, 104, 105, 46, 99, 111, 111, 107, 105, 101, 61, 50, 54, 48, 49, 53, 52, 51, 57, 53, 50]]
|
|
key = "org.freedesktop.Avahi.cookie"
|
|
expected_value = "2601543952"
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN,
|
|
self._DEF_ADDRESS, self._DEF_PORT, props)
|
|
value = service.get_one_property(key)
|
|
assert value and value == expected_value, "service properties weren't correct after init."
|
|
value = service.get_one_property('bork')
|
|
assert not value, "service properties weren't correct after init."
|
|
|
|
def testBoolProperty(self):
|
|
props = [[111, 114, 103, 46, 102, 114, 101, 101, 100, 101, 115, 107, 116, 111, 112, 46, 65, 118, 97, 104, 105, 46, 99, 111, 111, 107, 105, 101]]
|
|
key = "org.freedesktop.Avahi.cookie"
|
|
expected_value = True
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
|
self._DEF_PORT, props)
|
|
value = service.get_one_property(key)
|
|
assert value is not None and value == expected_value, "service properties weren't correct after init."
|
|
|
|
def testActivityService(self):
|
|
# Valid group service type, non-multicast address
|
|
actid = "4569a71b80805aa96a847f7ac1c407327b3ec2b4"
|
|
name = compose_service_name("Tommy", actid)
|
|
|
|
# Valid activity service name, None address
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, name, self._DEF_STYPE, self._DEF_DOMAIN, None,
|
|
self._DEF_PORT, self._DEF_PROPS)
|
|
assert service.get_address() == None, "address was not None as expected!"
|
|
assert service.get_activity_id() == actid, "activity id was different than expected!"
|
|
|
|
# Valid activity service name and multicast address, ensure it works
|
|
mc_addr = u"224.0.0.34"
|
|
objid = _next_objid()
|
|
service = Service(self._bus_name, objid, name, self._DEF_STYPE, self._DEF_DOMAIN, mc_addr,
|
|
self._DEF_PORT, self._DEF_PROPS)
|
|
assert service.get_address() == mc_addr, "address was not expected address!"
|
|
|
|
def addToSuite(suite):
|
|
suite.addTest(ServiceTestCase("testName"))
|
|
suite.addTest(ServiceTestCase("testType"))
|
|
suite.addTest(ServiceTestCase("testDomain"))
|
|
suite.addTest(ServiceTestCase("testAddress"))
|
|
suite.addTest(ServiceTestCase("testPort"))
|
|
suite.addTest(ServiceTestCase("testGoodInit"))
|
|
suite.addTest(ServiceTestCase("testAvahiProperties"))
|
|
suite.addTest(ServiceTestCase("testBoolProperty"))
|
|
suite.addTest(ServiceTestCase("testActivityService"))
|
|
addToSuite = staticmethod(addToSuite)
|
|
|
|
|
|
def main():
|
|
suite = unittest.TestSuite()
|
|
ServiceTestCase.addToSuite(suite)
|
|
runner = unittest.TextTestRunner()
|
|
runner.run(suite)
|
|
|
|
if __name__ == "__main__":
|
|
main()
|