def mount_device_async_gotdata(self, fd, cargo=None):
try:
log.debug('to object async got data getting tree')
tree = ElementTree(file=fd).getroot()
except Exception as e:
log.error("Bad device XML %s" % e.message)
self.callback(self.cargo, None)
return
DeviceBuilder(self.device, self.location, tree).cleanup()
if brisa.__skip_service_xml__:
self.callback(self.cargo, self.device)
else:
log.debug("Fetching device services")
log.debug("embedded devices: %s" % str(self.device.devices))
embedded_services = []
for d in list(self.device.devices.values()):
embedded_services.extend(list(d.services.items()))
log.debug("Embedded devices services are %s" % str(embedded_services))
self.pending_services = len(self.device.services) + \
len(embedded_services)
for service_name, service_object in \
list(self.device.services.items()):
service_object._build_async(self.service_has_been_built)
for s_name, s_obj in embedded_services:
s_obj._build_async(self.service_has_been_built)
def response(self, http_response, cargo):
""" Callback for receiving the HTTP response on a successful HTTP call.
@param http_response: response object
@param cargo: callback parameters passed at construction
@type http_response: HTTPResponse
@rtype: boolean
"""
log.debug("response")
compressed_headers = {}
for k, v in dict(http_response.getheaders()).items():
if not v:
v = ""
compressed_headers[k.lower()] = v.strip()
if 'sid' in compressed_headers:
sid = compressed_headers['sid']
timeout = 300
if 'timeout' in compressed_headers:
stimeout = compressed_headers['timeout']
if stimeout[0:7] == "Second-":
try:
timeout = int(stimeout[7:])
except ValueError:
log.error("value convert of timeout failed using default 300 seconds")
self.service.event_sid = sid
self.service.event_timeout = timeout
if self.callback and sid:
self.callback(self.cargo, sid, timeout)
return True
def run(self):
""" Implementation of the call procedure.
"""
if self.delay:
# This runs in a thread. We can sleep here instead using time
safe_sleep(self.delay)
log.debug('sleeping for %d' % self.delay)
if self.is_cancelled():
self.cleanup()
return
try:
log.debug('calling function')
# Performing the call
self.result = self.function(*self.args, **self.kwargs)
log.debug('got result %s' % self.result)
if self.success_callback:
log.debug('forwarding to success_callback')
self.success_callback(self.result, self.success_callback_cargo)
self.set_completed()
except Exception, e:
log.error('exception happened (%s), forwarding...' % str(e))
# Storing exception for handling
self.result = e
if self.error_callback:
self.error_callback(self.error_callback_cargo, e)
self.set_completed()
def application(self, environ, start_response):
""" WSGI application callback. May not be called directly by the
user.
"""
path = wsgiref.util.shift_path_info(environ)
if path in self._tree:
# Path directly available
return self._tree[path].application(environ, start_response)
else:
# End point or needs redirect. In case get_render is overriden,
# then a request should be handled by returned get_render()
# object.
req = Request(environ)
resp = Response(200, start_response)
render = self.get_render(req.uri, req.params)
if not render:
log.error('Could not find resource at %s' % req.uri)
return simple_response(404, start_response)
resp.body = render.render(req.uri, req, resp)
if not resp.body and not req.headers:
log.error('Body and headers were empty.')
return simple_response(404, start_response)
else:
resp._respond()
return resp.body
return simple_response(404, start_response)
def soap_Browse(self, *args, **kwargs):
""" Implements the Browse action for the ContentDirectory.
@param args: list of arguments for the Browse UPnP\
function
@param kwargs: dict of arguments for the Browse UPnP\
function
@type args: list
@type kwargs: dict
@return: the results of the browsing
@rtype: dict
"""
log.debug('Action on ContentDirectory: Browse%s', args)
# Formats the parameters for the real soap browse
args = (kwargs['ObjectID'], kwargs['BrowseFlag'], kwargs['Filter'],
kwargs['StartingIndex'], kwargs['RequestedCount'],
kwargs['SortCriteria'])
l = {}
l['query'] = 'Browse(ObjectID=%s, BrowseFlags=%s, Filter=%s, ' \
'StartingIndex=%s RequestedCount=%s SortCriteria=%s)' % \
tuple(map(repr, args))
try:
ret = self._soap_Browse(*args)
except Exception as e:
log.error('Action Browse on ContentDirectory: %s', e.message)
l['response'] = ret
return ret
def run(self):
""" Implementation of the call procedure.
"""
if self.delay:
# This runs in a thread. We can sleep here instead using time
safe_sleep(self.delay)
log.debug('sleeping for %d' % self.delay)
if self.is_cancelled():
self.cleanup()
return
try:
log.debug('calling function')
# Performing the call
self.result = self.function(*self.args, **self.kwargs)
log.debug('got result %s' % self.result)
if self.success_callback:
log.debug('forwarding to success_callback')
self.success_callback(self.result, self.success_callback_cargo)
self.set_completed()
except Exception as e:
log.error('exception happened (%s), forwarding...'
% str(e))
# Storing exception for handling
self.result = e
if self.error_callback:
self.error_callback(self.error_callback_cargo, e)
self.set_completed()
def soap_Browse(self, *args, **kwargs):
""" Implements the Browse action for the ContentDirectory.
@param args: list of arguments for the Browse UPnP\
function
@param kwargs: dict of arguments for the Browse UPnP\
function
@type args: list
@type kwargs: dict
@return: the results of the browsing
@rtype: dict
"""
log.debug('Action on ContentDirectory: Browse%s', args)
# Formats the parameters for the real soap browse
args = (kwargs['ObjectID'], kwargs['BrowseFlag'], kwargs['Filter'],
kwargs['StartingIndex'], kwargs['RequestedCount'],
kwargs['SortCriteria'])
l = {}
l['query'] = 'Browse(ObjectID=%s, BrowseFlags=%s, Filter=%s, ' \
'StartingIndex=%s RequestedCount=%s SortCriteria=%s)' % \
tuple(map(repr, args))
try:
ret = self._soap_Browse(*args)
except Exception, e:
log.error('Action Browse on ContentDirectory: %s', e.message)
def response(self, http_response, cargo):
""" Callback for receiving the HTTP response on a successful HTTP call.
@param http_response: response object
@param cargo: callback parameters passed at construction
@type http_response: HTTPResponse
@rtype: boolean
"""
log.debug("response")
compressed_headers = {}
for k, v in dict(http_response.getheaders()).items():
if not v:
v = ""
compressed_headers[k.lower()] = v.strip()
if 'sid' in compressed_headers:
sid = compressed_headers['sid']
timeout = 300
if 'timeout' in compressed_headers:
stimeout = compressed_headers['timeout']
if stimeout[0:7] == "Second-":
try:
timeout = int(stimeout[7:])
except ValueError:
log.error(
"value convert of timeout failed using default 300 seconds"
)
self.service.event_sid = sid
self.service.event_timeout = timeout
if self.callback and sid:
self.callback(self.cargo, sid, timeout)
return True
def application(self, environ, start_response):
""" WSGI application callback. May not be called directly by the
user.
"""
path = wsgiref.util.shift_path_info(environ)
if path in self._tree:
# Path directly available
return self._tree[path].application(environ, start_response)
else:
# End point or needs redirect. In case get_render is overriden,
# then a request should be handled by returned get_render()
# object.
req = Request(environ)
resp = Response(200, start_response)
render = self.get_render(req.uri, req.params)
if not render:
log.error('Could not find resource at %s' % req.uri)
return simple_response(404, start_response)
resp.body = render.render(req.uri, req, resp)
if not resp.body and not req.headers:
log.error('Body and headers were empty.')
return simple_response(404, start_response)
else:
resp._respond()
return resp.body
return simple_response(404, start_response)
def _soap_Browse(self, *args):
""" Real implementation of the soap browse.
@param args: list of arguments
@type args: list
@return: the results of browsing
@rtype: dict
"""
(object_id, browse_flag, filter, starting_index, requested_count,
sort_criteria) = args
try:
starting_index = int(starting_index)
requested_count = int(requested_count)
last_index = None
plugin = self.plugin_manager.root_plugin
if browse_flag == 'BrowseDirectChildren' and \
requested_count != 0:
last_index = requested_count + starting_index
if ':' in object_id:
namespace = object_id.split(':')[0]
plugin = self.plugin_manager.plugins_instances[namespace]
if not plugin:
log.error('Could not get plugin associated with this'\
'browse action on id %s' % object_id)
elements = plugin.browse(object_id, browse_flag, filter,
starting_index, requested_count,
sort_criteria)
elements.sort(cmp=compare_objects)
didl = Element()
total = 0
if plugin.has_browse_filter:
for item in elements:
didl.add_item(item)
total = total + 1
else:
for item in elements[starting_index: last_index]:
didl.add_item(item)
total = total + 1
didl_xml = didl.to_string()
soap_result = {'Result': didl_xml,
'TotalMatches': len(elements),
'NumberReturned': total,
'UpdateID': self.updateID}
except Exception as e:
soap_result = {'Result': '',
'TotalMatches': 0,
'NumberReturned': 0,
'UpdateID': self.updateID}
log.error('ContentDirectory.Browse internal problem: %s', e)
return soap_result
def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit first parent.
except OSError, e:
log.error("fork #1 failed: (%d) %s\n", e.errno, e.strerror)
sys.exit(1)
def mount_device_async_gotdata(self, fd, cargo=None):
try:
log.debug('to object async got data getting tree')
tree = ElementTree(file=fd).getroot()
except Exception, e:
log.error("Bad device XML %s" % e.message)
self.callback(self.cargo, None)
return
def mount_device_async_gotdata(self, fd, cargo=None):
try:
log.debug('to object async got data getting tree')
tree = ElementTree(file=fd).getroot()
except Exception, e:
log.error("Bad device XML %s" % e.message)
self.callback(self.cargo, None)
return
def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit first parent.
except OSError, e:
log.error("fork #1 failed: (%d) %s\n", e.errno, e.strerror)
sys.exit(1)
def stop(self):
self.player.set_state(gst.STATE_NULL)
if self.player.set_state(gst.STATE_READY) == gst.STATE_CHANGE_FAILURE:
log.error("error stopping")
return
self.player_state = 0
self.av_uri = self.__av_uri
def play(self):
if self.av_uri is not None:
if (self.player.set_state(gst.STATE_PLAYING) ==
gst.STATE_CHANGE_FAILURE):
log.error("error trying to play %s.", self.av_uri)
self.player_state = 1
else:
log.info("av_uri is None, unable to play.")
def play(self):
if self.av_uri is not None:
if (self.player.set_state(
gst.STATE_PLAYING) == gst.STATE_CHANGE_FAILURE):
log.error("error trying to play %s.", self.av_uri)
self.player_state = 1
else:
log.info("av_uri is None, unable to play.")
def stop(self):
self.player.set_state(gst.STATE_NULL)
if self.player.set_state(gst.STATE_READY) == gst.STATE_CHANGE_FAILURE:
log.error("error stopping")
return
self.player_state = 0
self.av_uri = self.__av_uri
def _load_plugins(self):
""" Loads all plugins selected using _load_plugin() method.
"""
try:
plugins = self.plugins_instances.values()
for plugin in plugins:
self._load_plugin(plugin)
except Exception, e:
log.error("Error loading plugin %s: %s", plugin.name, e)
def play(self):
if self.av_uri is not None:
if self.player.set_state(gst.STATE_PLAYING) == \
gst.STATE_CHANGE_FAILURE:
log.error("gst_renderer error while trying to play")
return
self.player_state = 1
else:
log.info("av_uri is None, unable to play.")
def _load_plugins(self):
""" Loads all plugins selected using _load_plugin() method.
"""
try:
plugins = self.plugins_instances.values()
for plugin in plugins:
self._load_plugin(plugin)
except Exception, e:
log.error("Error loading plugin %s: %s", plugin.name, e)
def _datagram_received(self, data, address):
""" Callback for the UDPListener when messages arrive.
@param data: raw data received
@param host: host where data came from
@param port: port where data came from
@type data: string
@type host: string
@type port: integer
"""
(host, port) = address
try:
cmd, headers = parse_http_response(data)
body = data[data.find("<"):data.rfind(">")+1]
except Exception as err:
log.error('Error while receiving datagram packet: %s', str(err))
return
# Render notify message
if not (cmd[0] == 'NOTIFY' and cmd[1] == '*' and cmd[2] == 'HTTP/1.0' and \
'content-type' in headers and \
headers['content-type'] == 'text/xml; charset="utf-8"' and \
'nt' in headers and headers['nt'] == 'upnp:event' and \
'nts' in headers and headers['nts'] == 'upnp:propchange' and \
'host' in headers and 'usn' in headers and \
'svcid' in headers and 'seq' in headers and \
'lvl' in headers and 'bootid.upnp.org' in headers and \
'content-length' in headers):
log.warning('Invalid message')
return
addr = headers['host'].split(':')[0]
port = int(headers['host'].split(':')[1])
udn = headers['usn'].split('::')[0]
service_type = headers['usn'].split('::')[1]
svcid = headers['svcid']
seq = int(headers['seq'])
lvl = headers['lvl']
content_length = int(headers['content-length'])
bootid = int(headers['bootid.upnp.org'])
if addr != UPnPDefaults.MULTICAST_EVENT_ADDR or \
port != UPnPDefaults.MULTICAST_EVENT_PORT:
log.warning('Invalid address %s:%d' % (addr, port))
return
changed_vars = read_notify_message_body(body)
self.control_point._on_event('', changed_vars)
for id, dev in list(self.control_point._known_devices.items()):
service = self._find_service(dev, udn, service_type, svcid)
if service != None:
service._on_event(changed_vars)
log.debug('Multicast event. Event changed vars: %s', changed_vars)
def play(self):
if self.av_uri is not None:
if self.player.set_state(gst.STATE_PLAYING) == \
gst.STATE_CHANGE_FAILURE:
log.error("gst_renderer error while trying to play")
return
self.player_state = 1
else:
log.info("av_uri is None, unable to play.")
def _instantiate_plugins(self):
""" Instantiates all plugin classes into the plugin manager.
"""
plugins = self.plugins_classes.values()
for plugin in plugins:
if plugin.usage:
try:
self.plugins_instances[plugin.name] = plugin()
except Exception, e:
log.error("Error while instantiating %s: %s" % (plugin.name, str(e)))
def application(self, environ, start_response):
""" WSGI application callback. May not be called directly by the
user.
"""
# if environ['HTTP_USER_AGENT'] != 'TeraStation-IMHTTP/1.8.225':
# print "@ Resource.application @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
# print environ
# print start_response
path = wsgiref.util.shift_path_info(environ)
# print path
# print self._tree
# circuits
# print environ['wsgi.input'].getvalue()
# cherrypy
# print environ['wsgi.input'].read()
if path in self._tree:
# print "PATH"
# print self._tree[path]
# print self._tree[path].application
# Path directly available
return self._tree[path].application(environ, start_response)
else:
# End point or needs redirect. In case get_render is overriden,
# then a request should be handled by returned get_render()
# object.
# print "NO PATH"
req = Request(environ)
resp = Response(200, start_response)
# print "resp: " + str(resp)
render = self.get_render(req.uri, req.params)
# print "RENDER: " + str(render)
if not render:
log.error('Could not find resource at %s' % req.uri)
return simple_response(404, start_response)
# print "~~~~~ before >>>>>>>>>>>>>>>>>>>>"
resp.body = render.render(req.uri, req, resp)
# print "~~~~~ after >>>>>>>>>>>>>>>>>>>>>"
# print "resp.body: " + str(resp.body)
if not resp.body and not req.headers:
log.error('Body and headers were empty.')
return simple_response(404, start_response)
else:
resp._respond()
# print "resp.body2: " + str(resp.body)
return resp.body
return simple_response(404, start_response)
def _instantiate_plugins(self):
""" Instantiates all plugin classes into the plugin manager.
"""
plugins = self.plugins_classes.values()
for plugin in plugins:
if plugin.usage:
try:
self.plugins_instances[plugin.name] = plugin()
except Exception, e:
log.error("Error while instantiating %s: %s" % \
(plugin.name, str(e)))
def start(self):
""" Starts the device.
"""
log.info('Starting device %s' % self.friendly_name)
log.info('Starting device\'s services')
for k, v in self.services.items():
try:
log.info('Starting service %s' % k)
v.start()
except Exception, e:
log.error('Error starting service %s: %s' % (k, e))
def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_EOS:
self.player.set_state(gst.STATE_NULL)
self.player_state = 0
self.player.set_state(gst.STATE_READY)
elif t == gst.MESSAGE_ERROR:
self.player.set_state(gst.STATE_NULL)
log.error(str(message))
self.player_state = 0
self.player.set_state(gst.STATE_READY)
def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_EOS:
self.player.set_state(gst.STATE_NULL)
self.player_state = 0
self.player.set_state(gst.STATE_READY)
elif t == gst.MESSAGE_ERROR:
self.player.set_state(gst.STATE_NULL)
log.error(str(message))
self.player_state = 0
self.player.set_state(gst.STATE_READY)
def _validate_renew_request(self, request, compressed_headers):
if 'callback' in compressed_headers or 'nt' in compressed_headers:
log.error('Missing callback or nt')
return 400, None
subs = self._find_subscriber(compressed_headers['sid'])
if not subs:
log.error('Subscriber does not exist')
return 412, None
#TODO: Put the verification of error 5xx
# No errors
return 200, subs
def _build_error(self, request, response_obj, status):
log.error('Building error response')
response = soap.build_soap_error(status)
response_obj.status = 500
if self.encoding is not None:
mime_type = 'text/xml; charset="%s"' % self.encoding
else:
mime_type = "text/xml"
response_obj.headers["Content-type"] = mime_type
response_obj.headers["Content-length"] = str(len(response))
response_obj.headers["EXT"] = ''
response_obj.body = response
return response
def _find_and_import_plugins(self, plugins_folder, plugins_modules_path):
for root, dirs, files in os.walk(plugins_folder):
if root != plugins_folder:
break
for dir in dirs:
if not dir.startswith("."):
try:
module_path = '%s.%s' % (plugins_modules_path, dir)
__import__(module_path)
except Exception, e:
msg = 'Error while importing %s plugin. The module '\
'path used to load was: %s. Error: %s' % \
(dir, module_path, e)
log.error(msg)
def _validate_subscribe_request(self, request, compressed_headers):
log.debug('Validating subscribe request')
#TODO: verify if the callback url is a valid one
if not 'callback' in compressed_headers:
log.error('There is not a callback at the request')
return 412
if (not 'nt' in compressed_headers) or \
(compressed_headers['nt'] != "upnp:event"):
return 412
#TODO: Put the verification of error 5xx
# No errors
return 200
def _main_trigger_timers(self):
""" Triggers the timers that are ready.
"""
for callback in self._timers.values():
if callback.timeout_abs - callback.threshold < time.time():
log.debug('Callback ready: %s' % str(callback))
if self.is_running():
try:
callback()
except KeyboardInterrupt, k:
# Ctrl-C would be ignored
return False
except:
log.error('Error while processing timer %s' %
str(callback))
def _main_trigger_timers(self):
""" Triggers the timers that are ready.
"""
for callback in self._timers.values():
if callback.timeout_abs - callback.threshold < time.time():
log.debug('Callback ready: %s' % str(callback))
if self.is_running():
try:
callback()
except KeyboardInterrupt, k:
# Ctrl-C would be ignored
return False
except:
log.error('Error while processing timer %s' %
str(callback))
def _find_and_import_plugins(self, plugins_folder, plugins_modules_path):
for root, dirs, files in os.walk(plugins_folder):
if root != plugins_folder:
break
for dir in dirs:
if not dir.startswith("."):
try:
module_path = '%s.%s' % (plugins_modules_path, dir)
__import__(module_path)
except Exception, e:
msg = 'Error while importing %s plugin. The module '\
'path used to load was: %s. Error: %s' % \
(dir, module_path, e)
log.error(msg)
def start(self):
""" Starts the device.
"""
log.info('Starting device %s' % self.friendly_name)
log.info('Starting device\'s services')
for k, v in self.services.items():
try:
if self._force_event_reload:
v._set_force_event_reload(self._force_event_reload)
else:
if self._event_reload_time:
v._set_event_reload_time(self._event_reload_time)
log.info('Starting service %s' % k)
v.start()
except Exception, e:
log.error('Error starting service %s: %s' % (k, str(e)))
def start(self):
""" Starts the device.
"""
log.info('Starting device %s' % self.friendly_name)
log.info('Starting device\'s services')
for k, v in self.services.items():
try:
if self._force_event_reload:
v._set_force_event_reload(self._force_event_reload)
else:
if self._event_reload_time:
v._set_event_reload_time(self._event_reload_time)
log.info('Starting service %s' % k)
v.start()
except Exception, e:
log.error('Error starting service %s: %s' % (k, e))
def __init__(self, subscriber, variables, event_delay, cargo):
""" Constructor for the EventMessage class.
@param subscriber: subscriber that will receive the message
@param variables: variables of the event
@param event_delay: delay to wait before sending the event
@param cargo: callback parameters
@type subscriber: Subscriber
@type variables: dict
@type event_delay: float
"""
log.debug("event message")
if not variables:
log.error("There are no variables to send")
return
self.cargo = cargo
headers = {}
headers["HOST"] = subscriber.delivery_url
headers["CONTENT-TYPE"] = 'text/xml'
headers["NT"] = 'upnp:event'
headers["NTS"] = 'upnp:propchange'
headers["SID"] = "uuid:" + str(subscriber.subscription_id)
headers["SEQ"] = str(subscriber.event_key)
subscriber.event_key_increment()
event_body = self._build_message_body(variables)
headers["CONTENT-LENGTH"] = str(len(event_body))
log.debug("Running http call")
run_async_call(http_call,
success_callback=self.response,
error_callback=self.error,
delay=event_delay,
method='NOTIFY',
url=subscriber.delivery_url,
body=event_body,
headers=headers)
def update(self, value):
""" Updates the state variable value. The new value must
has the same type as specified at data type.
@param value: new value.
@type value: data_type
"""
# log.debug("Updating state variable")
if self._value == value:
log.debug("Don't update")
return
self._value = value
if self.send_events:
for callback in self._callbacks:
try:
callback(self.name, self._value)
except Exception, e:
log.error('Error at callback %s' % str(callback))
raise e
class MulticastEventController:
msg_already_started = 'tried to start() MulticastEventController when already started'
msg_already_stopped = 'tried to stop() MulticastEventController when already stopped'
def __init__(self, parent_udn, service, event_reload_time, force_event_reload):
self.service = service
self.parent_udn = parent_udn
self.udp_transport = UDPTransport()
self.listen_udp = UDPListener(UPnPDefaults.MULTICAST_EVENT_ADDR,
UPnPDefaults.MULTICAST_EVENT_PORT,
data_callback=self._datagram_received,
shared_socket=self.udp_transport.socket)
self.eventing_variables = {}
self.event_key = 0
self.event_reload_time = event_reload_time
self.force_event_reload = force_event_reload
if not self.force_event_reload:
self.l_call = LoopingCall(self.send_variables)
reactor.add_after_stop_func(self.stop)
self._is_running = False
def _datagram_received(self, data, (host, port)):
""" Callback for the UDPListener when messages arrive.
@param data: raw data received
@param host: host where data came from
@param port: port where data came from
@type data: string
@type host: string
@type port: integer
"""
log.debug("device.MEC._datagram_received host: %s, port: %s\ndata: %s", host, port, data)
try:
cmd, headers = parse_http_response(data)
body = data[data.find("<"):data.rfind(">")+1]
except Exception, err:
log.error('Error while receiving datagram packet: %s', str(err))
return
def start(self):
""" Starts the device.
"""
log.info('Starting device %s' % self.friendly_name)
log.info('Starting device\'s services')
for k, v in list(self.services.items()):
try:
if self._force_event_reload:
v._set_force_event_reload(self._force_event_reload)
else:
if self._event_reload_time:
v._set_event_reload_time(self._event_reload_time)
log.info('Starting service %s' % k)
v.start()
except Exception as e:
log.error('Error starting service %s: %s' % (k, str(e)))
self._publish()
self.SSDP.register_device(self)
self.webserver.start()
self.SSDP.start()
self.SSDP.announce_device()
log.info('Finished starting device %s' % self.friendly_name)
def update(self, value):
""" Updates the state variable value. The new value must
has the same type as specified at data type.
@param value: new value.
@type value: data_type
"""
log.debug("Updating state variable %s: %s" % (self.name, str(value)))
if self._value == value:
log.debug("Don't update. Same value.")
return
self._value = value
if self.send_events:
cbs = self._callbacks[:]
log.debug("Calling callbacks")
for callback in cbs:
try:
callback(self.name, self._value)
except Exception, e:
log.error('Error at callback %s' % str(callback))
self._callbacks.remove(callback)
def update(self, value):
""" Updates the state variable value. The new value must
has the same type as specified at data type.
@param value: new value.
@type value: data_type
"""
# unicode issue log.debug("Updating state variable %s: %s" % (self.name, str(value)))
if self._value == value:
log.debug("Don't update. Same value.")
return
self._value = value
if self.send_events:
cbs = self._callbacks[:]
log.debug("Calling callbacks")
for callback in cbs:
try:
callback(self.name, self._value)
except Exception, e:
log.error('Error at callback %s' % str(callback))
raise e
def build_notify_message_body(variables):
log.debug("Building event message body")
property_set = ElementTree.Element("e:propertyset")
property_set.attrib.update({'xmlns:e': "urn:schemas-upnp-org:event-1-0"})
for var_name, var_value in variables.items():
property = ElementTree.SubElement(property_set, "e:property")
try:
var_val = map_upnp_value(var_value)
except:
#TODO - raise an error?
log.error("Unknown state variable type")
pass
if var_val == None:
var_val = ''
e = ElementTree.SubElement(property, var_name)
e.text = var_val
return ElementTree.tostring(property_set, 'utf-8')
def __init__(self, subscriber, variables, event_delay, cargo):
""" Constructor for the EventMessage class.
@param subscriber: subscriber that will receive the message
@param variables: variables of the event
@param event_delay: delay to wait before sending the event
@param cargo: callback parameters
@type subscriber: Subscriber
@type variables: dict
@type event_delay: float
"""
log.debug("event message")
if not variables:
log.error("There are no variables to send")
return
self.cargo = cargo
headers = {}
# headers["HOST"] = subscriber.delivery_url
headers["HOST"] = subscriber.host
headers["CONTENT-TYPE"] = 'text/xml'
headers["NT"] = 'upnp:event'
headers["NTS"] = 'upnp:propchange'
headers["SID"] = "uuid:" + str(subscriber.subscription_id)
headers["SEQ"] = str(subscriber.event_key)
subscriber.event_key_increment()
event_body = self._build_message_body(variables)
headers["CONTENT-LENGTH"] = str(len(event_body))
log.debug("Running http call")
run_async_call(http_call, success_callback=self.response,
error_callback=self.error, delay=event_delay,
method='NOTIFY', url=subscriber.delivery_url,
body=event_body, headers=headers)
class MulticastEventListener:
""" Represents a multicast event listener. Contains some control
functions for starting and stopping the listener.
"""
msg_already_started = 'tried to start() MulticastEventListener when already started'
msg_already_stopped = 'tried to stop() MulticastEventListener when already stopped'
def __init__(self, control_point, start=True):
""" Constructor for the MulticastEventListener class.
@param ssdp: ssdp server instance that will receive new device events
and subscriptions
@param start: if True starts the search when constructed
@param ssdp_addr: ssdp address for listening (UDP)
@param ssdp_port: ssdp port for listening (UDP)
@type ssdp: SSDPServer
@type start: boolean
@type ssdp_addr: string
@type ssdp_port integer
"""
self.udp_transport = UDPTransport()
self.listen_udp = UDPListener(UPnPDefaults.MULTICAST_EVENT_ADDR,
UPnPDefaults.MULTICAST_EVENT_PORT,
data_callback=self._datagram_received,
shared_socket=self.udp_transport.socket)
self.control_point = control_point
if start:
self.start()
def _datagram_received(self, data, (host, port)):
""" Callback for the UDPListener when messages arrive.
@param data: raw data received
@param host: host where data came from
@param port: port where data came from
@type data: string
@type host: string
@type port: integer
"""
log.debug("cp.event._datagram_received host: %s, port: %s\ndata: %s",
host, port, data)
try:
cmd, headers = parse_http_response(data)
body = data[data.find("<"):data.rfind(">") + 1]
except Exception, err:
log.error('Error while receiving datagram packet: %s', str(err))
return
def build_notify_message_body(variables):
log.debug("Building event message body")
property_set = ElementTree.Element("e:propertyset")
property_set.attrib.update({'xmlns:e':
"urn:schemas-upnp-org:event-1-0"})
for var_name, var_value in variables.items():
property = ElementTree.SubElement(property_set, "e:property")
try:
var_val = map_upnp_value(var_value)
except:
#TODO - raise an error?
log.error("Unknown state variable type")
pass
if var_val == None:
var_val = ''
e = ElementTree.SubElement(property, var_name)
e.text = var_val
return ElementTree.tostring(property_set, 'utf-8')
def __call__(self, *args, **kwargs):
log.debug('Entering at action %s __call__' % self.name)
# Update in arguments
in_kwargs = {}
log.debug('Updating IN variables')
for arg_name, arg_value in kwargs.iteritems():
if arg_name != '__header__':
arg = self.get_in_argument(arg_name)
if not arg:
log.error('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
raise InvalidActionInput('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
if arg.state_var:
arg.state_var.update(arg_value)
in_kwargs[arg_name] = arg_value
log.debug('Calling run function')
returned_kwargs = self.run_function(*(), **in_kwargs)
if not isinstance(returned_kwargs, dict):
msg = 'returned value from service function is not a dict.'
log.error(msg)
raise InvalidActionOutput(msg)
# Update out arguments
out_kwargs = {}
log.debug('Updating OUT variables')
for arg_name, arg_value in returned_kwargs.iteritems():
if arg_name != '__header__':
arg = self.get_out_argument(arg_name)
if not arg:
log.error('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
raise InvalidActionOutput('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
if arg.state_var:
arg.state_var.update(arg_value)
out_kwargs[arg_name] = arg_value
log.debug('Returning from action %s __call__' % self.name)
if "__header__" in out_kwargs:
header = out_kwargs.pop('__header__', {})
return {self.name + "Response": out_kwargs,
"__header__": header}
else:
return {self.name + "Response": out_kwargs}
def __call__(self, *args, **kwargs):
log.debug('Entering at action %s __call__' % self.name)
# Update in arguments
in_kwargs = {}
log.debug('Updating IN variables')
for arg_name, arg_value in kwargs.iteritems():
if arg_name != '__header__':
arg = self.get_in_argument(arg_name)
if not arg:
log.error('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
raise InvalidActionInput('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
if arg.state_var:
arg.state_var.update(arg_value)
in_kwargs[arg_name] = arg_value
log.debug('Calling run function')
returned_kwargs = self.run_function(*(), **in_kwargs)
if not isinstance(returned_kwargs, dict):
msg = 'returned value from service function is not a dict.'
log.error(msg)
raise InvalidActionOutput(msg)
# Update out arguments
out_kwargs = {}
log.debug('Updating OUT variables')
for arg_name, arg_value in returned_kwargs.iteritems():
if arg_name != '__header__':
arg = self.get_out_argument(arg_name)
if not arg:
log.error('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
raise InvalidActionOutput('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
if arg.state_var:
arg.state_var.update(arg_value)
out_kwargs[arg_name] = arg_value
log.debug('Returning from action %s __call__' % self.name)
if "__header__" in out_kwargs:
header = out_kwargs.pop('__header__', {})
return {self.name + "Response": out_kwargs, "__header__": header}
else:
return {self.name + "Response": out_kwargs}
def _validate_unsubscribe_request(self, request, compressed_headers):
if not 'sid' in compressed_headers:
log.error('Missing sid')
return 412, None
if 'callback' in compressed_headers or 'nt' in compressed_headers:
log.error('Missing callback or nt')
return 400, None
subs = self._find_subscriber(compressed_headers['sid'])
if not subs:
log.error('Subscriber does not exist')
return 412, None
# No errors
return 200, subs
def __call__(self, *args, **kwargs):
log.debug('Entering at action %s __call__' % self.name)
# Update in arguments
in_kwargs = {}
log.debug('Updating IN variables')
for arg_name, arg_value in kwargs.iteritems():
arg = self.get_in_argument(arg_name)
if not arg:
log.error('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
raise InvalidActionInput('Input argument "%s" not' \
' present on action definition.' \
% arg_name)
arg.state_var.update(arg_value)
in_kwargs[arg_name] = arg_value
log.debug('Calling run function')
out_args = self.run_function(*(), **in_kwargs)
if not isinstance(out_args, dict):
log.error('output is not a dict.')
raise InvalidActionOutput('output is not a dict.')
# Update out arguments
return_args = {}
log.debug('Updating OUT variables')
for arg_name, arg_value in out_args.iteritems():
arg = self.get_out_argument(arg_name)
if not arg:
log.error('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
raise InvalidActionOutput('output contains argument "%s" not'\
' present on action definition' % \
arg_name)
arg.state_var.update(arg_value)
return_args[arg_name] = arg_value
log.debug('Returning from action %s __call__' % self.name)
return {self.name + "Response": return_args}
def mount_device_async_error(self, cargo, error):
log.error("Error fetching %s - Error: %s" %
(self.location, str(error)))
self.callback(self.cargo, None)
return True
hcopy = dict(headers.iteritems())
hcopy['st'] = self.known_device[i]['ST']
self._discovery_request(hcopy, (host, port))
return
for key in self.known_device.keys():
if self.known_device[key]['ST'].split()[0] == (
headers['st']).split()[0]:
right_key = key
break
else:
log.debug('Discovery request ST %s not found', headers['st'])
return
if right_key == 0:
log.error('Unknown error in DiscoveryRequest for %s',
headers['st'])
return
# Generate a response
response = []
response.append('HTTP/1.1 200 OK')
append = response.append
[
append('%s: %s' % (k, v))
for k, v in self.known_device[right_key].items()
]
response.extend(('', ''))
delay = random.randint(0, int(headers['mx']))
# Avoid using a timer with delay 0 :)
if delay:
class SSDPServer(object):
""" Implementation of a SSDP server.
The notify_received and search_received methods are called when the
appropriate type of datagram is received by the server.
"""
msg_already_started = 'tried to start() SSDPServer when already started'
msg_already_stopped = 'tried to stop() SSDPServer when already stopped'
def __init__(self,
server_name,
xml_description_filename,
max_age=1800,
receive_notify=True,
udp_listener=''):
""" Constructor for the SSDPServer class.
@param server_name: server name
@param xml_description_filename: XML description filename
@param max_age: max age parameter, default 1800.
@param receive_notify: if False, ignores notify messages
@type server_name: string
@type xml_description_filename:
@type max_age: integer
@type receive_notify: boolean
"""
self.server_name = server_name
self.xml_description_filename = xml_description_filename
self.max_age = max_age
log.debug("max_age: %s", max_age)
self.receive_notify = receive_notify
self.running = False
self.known_device = {}
self.advertised = {}
self._callbacks = {}
self.udp_transport = UDPTransport()
if udp_listener == '':
self.udp_listener = UDPListener(
SSDP_ADDR, SSDP_PORT, data_callback=self._datagram_received)
else:
self.udp_listener = None
udp_listener.subscribe(self)
self.renew_loop = LoopingCall(self._renew_notifications)
self.renew_loop.start(0.8 * self.max_age, now=True)
def is_running(self):
""" Returns True if the SSDPServer is running, False otherwise.
"""
return self.running
def start(self):
""" Starts the SSDPServer.
"""
if not self.is_running():
if self.udp_listener != None:
self.udp_listener.start()
self.running = True
else:
log.warning(self.msg_already_started)
def stop(self):
""" Sends bye bye notifications and stops the SSDPServer.
"""
if self.is_running():
# Avoid racing conditions
own_temp = self.advertised.copy()
for usn in own_temp:
self._do_byebye(usn)
self.renew_loop.stop()
if self.udp_listener != None:
self.udp_listener.stop()
self.running = False
else:
log.warning(self.msg_already_stopped)
def destroy(self):
""" Destroys the SSDPServer.
"""
if self.is_running():
self.stop()
self.renew_loop.destroy()
if self.udp_listener != None:
self.udp_listener.destroy()
self._cleanup()
def clear_device_list(self):
""" Clears the device list.
"""
self.known_device.clear()
def discovered_device_failed(self, dev):
""" Device could not be fully built, so forget it.
"""
usn = dev['USN']
if usn in self.known_device:
self.known_device.pop(usn)
def is_known_device(self, usn):
""" Returns if the device with the passed usn is already known.
@param usn: device's usn
@type usn: string
@return: True if it is known
@rtype: boolean
"""
return usn in self.known_device
def subscribe(self, name, callback):
""" Subscribes a callback for an event.
@param name: name of the event. May be "new_device_event" or
"removed_device_event"
@param callback: callback
@type name: string
@type callback: callable
"""
self._callbacks.setdefault(name, []).append(callback)
def unsubscribe(self, name, callback):
""" Unsubscribes a callback for an event.
@param name: name of the event
@param callback: callback
@type name: string
@type callback: callable
"""
callbacks = self._callbacks.get(name, [])
[callbacks.remove(c) for c in callbacks]
self._callbacks[name] = callbacks
def announce_device(self):
""" Announces the device.
"""
log.debug("announce_device")
[self._do_notify(usn) for usn in self.advertised]
def register_device(self, device):
""" Registers a device on the SSDP server.
@param device: device to be registered
@type device: Device
"""
self._register_device(device)
if device.is_root_device():
[self._register_device(d) for d in device.devices.values()]
# Messaging
def _datagram_received(self, data, (host, port)):
""" Handles a received multicast datagram.
@param data: raw data
@param host: datagram source host
@param port: datagram source port
@type data: string
@type host: string
@type port: integer
"""
log.debug("SSDP._datagram_received host: %s, port: %s\ndata: %s", host,
port, data)
try:
header, payload = data.split('\r\n\r\n')
except ValueError, err:
log.error('Error while receiving datagram packet: %s', str(err))
return