def read_resource(self, server_ip, server_port, endpoint_name, object_id, res_id, object_inst_id=None, \
res_inst_id=None, client_port=5683):
query = "?method=read"
server_ip_port = server_ip + ":" + str(server_port)
path = "rd/" + endpoint_name + "/" + str(object_id)
if object_inst_id is not None:
path += "/" + str(object_inst_id)
else:
path +="/0"
if res_id is not None:
path += "/" + str(res_id)
if res_inst_id is not None:
path += "/" +str(res_inst_id)
else:
path += "/0"
payload = None
#content_type = "application/json"
path += query
client = CoapClient("coap://" + server_ip_port, client_port=client_port)
#result = client.get(path, data=payload, content_type=content_type)
result = client.get(path, data=payload, timeout=10000)
return result
def send_observe_request(self, server_ip, server_port, app_ip, app_port, endpoint_name, object_id, observe, \
payload=None, object_inst_id=None, res_id=None, \
res_inst_id=None, content_type=None, token=None, client_port=5683):
server_ip_port = server_ip + ":" + str(server_port)
path = "rd"
if payload is not None and endpoint_name is None:
pass
elif endpoint_name is not None:
path += "/" + endpoint_name
payload = dumps({"app_ip" : app_ip, "app_port" : app_port})
content_type = "application/json"
if object_id is not None:
path += "/" + str(object_id)
if object_inst_id is not None:
path += "/" + str(object_inst_id)
if res_id is not None:
path += "/" + str(res_id)
if res_inst_id is not None:
path += "/" + str(res_inst_id)
else:
message = "Object ID is missing"
self.logger.error(message)
return message
else:
message = "Endpoint is missing"
self.logger.error(message)
return message
try:
client = CoapClient("coap://" + server_ip_port, client_port=client_port)
result = client.get(path, data=payload, observe=observe, content_type=content_type, token=token)
except:
return None
return result
def discover_resources(self, server_ip, server_port, payload=None, endpoint_name=None,
object_id=None, object_inst_id=None, res_id=None, res_inst_id=None, client_port=5683):
server_ip_port = server_ip + ":" + str(server_port)
query = "?method=discover"
content_type = None
path = "rd"
if payload is not None:
""" ".well-known/core" is a payload """
content_type = "text/plain"
else:
if (endpoint_name or object_id) is not None:
path += "/" + endpoint_name + "/" + str(object_id)
if object_inst_id is None and res_id is not None:
object_inst_id = 0
path += "/" + str(object_inst_id)
elif object_inst_id is not None:
path += "/" + str(object_inst_id)
if res_id is not None:
path += "/" + str(res_id)
if res_inst_id is None:
res_inst_id = 0
path += "/" + str(res_inst_id)
else:
self.logger.error("Endpoint Name and object_id should be specified")
return
path += query
client = CoapClient("coap://" + server_ip_port, client_port=client_port)
result = client.get(path, data=payload, timeout=10000, content_type=content_type)
return result
class XIXCoap(LoggerMixin):
def __init__(self, uri, client_port=None, *args, **kw):
self.client = CoapClient(uri, client_port)
self.logger.debug("CoapClient created with uri %s", uri)
self.__serializer = JsonSerializer()
self.methodmappers = {
"create": self._send_create,
"notify": self._send_notify,
"update": self._send_update,
"delete": self._send_delete,
"retrieve": self._send_retrieve
}
def send_request_indication(self, request_indication):
path = request_indication.path
if path.startswith('/'):
path = path[1:]
mapper = self.methodmappers[request_indication.method]
return mapper(request_indication, path)
def _raise_error(self, method, response):
try:
status_code = _coap2etsi[response.code]
except KeyError:
self.logger.warning("Failed to map coap response code: %s",
response.code)
status_code = openmtc.exc.STATUS_INTERNAL_SERVER_ERROR
raise ErrorResponseConfirmation(
statusCode=status_code,
primitiveType=method,
errorInfo=response.payload or "<no further information available>")
def _send_create(self, request_indication, path):
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
resp = self.client.post(path, data, content_type="application/json")
if resp.code >= 100:
self._raise_error("create", resp)
return CreateResponseConfirmation(resp.payload)
def _send_notify(self, request_indication, path):
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
resp = self.client.post(path, data, content_type="application/json")
if resp.code >= 100:
self._raise_error("notify", resp)
return NotifyResponseConfirmation()
def _send_update(self, request_indication, path):
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
resp = self.client.put(path, data, content_type="application/json")
if resp.code >= 100:
self._raise_error("create", resp)
return UpdateResponseConfirmation()
def _send_retrieve(self, request_indication, path):
resp = self.client.get(path)
if resp.code >= 100:
self._raise_error("create", resp)
return decode_result(request_indication.path, resp.payload,
resp.content_format)
def _send_delete(self, request_indication, path):
resp = self.client.delete(path)
if resp.code >= 100:
self._raise_error("create", resp)
return DeleteResponseConfirmation()
def create(self, path, resource):
return self.send_request_indication(
CreateRequestIndication(path, resource))
def update(self, resource, fields=()):
return self.send_request_indication(
UpdateRequestIndication(resource.path, resource, fields=fields))
def retrieve(self, path):
return self.send_request_indication(RetrieveRequestIndication(path))
def delete(self, path):
return self.send_request_indication(DeleteRequestIndication(path))
class XIXCoap(LoggerMixin):
"""XIXCoap serializes RequestIndications to CoAP messages and sends them using a CoapClient"""
def __init__(self,
uri,
client_port=None,
scl_base=None,
use_xml=False,
keyfile=None,
certfile=None,
block_size_exponent=10,
*args,
**kw):
"""Initializes XIXCoap and its underlying CoapClient
:param uri:URI referencing the server this clients is trying to reach. Can contain SCHEME://IP:PORT
:param client_port: Port used by the client when sending requests
:param scl_base: Default basename to prefix an SCL resource path
:param use_xml: Binary parameter swapping between content types of xml and json
"""
self.client = CoapClient(uri,
client_port or 25682,
keyfile=keyfile,
certfile=certfile,
block_size_exponent=block_size_exponent)
self.scl_base = scl_base
self.logger.debug("CoapClient created with uri %s", uri)
if use_xml:
from openmtc_etsi.serializer.xml import XMLSerializer as Serializer
self.content_type = "application/xml"
else:
from openmtc_etsi.serializer.json import JsonSerializer as Serializer
self.content_type = "application/json"
self.__serializer = Serializer()
self.methodmappers = {
"create": self._send_create,
"notify": self._send_notify,
"update": self._send_update,
"delete": self._send_delete,
"retrieve": self._send_retrieve
}
def send_request_indication(self, request_indication):
"""Serializes a RequestIndication to a CoAP message and sends it using a CoapClient
:param request_indication: RequestIndication to be processed
:return: Corresponding ResponseConfirmation
"""
if self.scl_base is not None and \
not request_indication.path.startswith(self.scl_base) and \
"://" not in request_indication.path:
request_indication.path = self.scl_base + request_indication.path
path = request_indication.path
if path.startswith('/'):
path = path[1:]
mapper = self.methodmappers[request_indication.method]
return mapper(request_indication, path)
def _raise_error(self, method, response):
"""Handles reponses containing an error status code. Generates an ErrorResponseConfirmation.
:param method: Request method, can be "create", "notify", "update", "delete" or "retrieve"
:param response: CoAP response
"""
try:
status_code = _coap2etsi[response.code]
except KeyError:
self.logger.warning("Failed to map coap response code: %s",
response.code)
status_code = openmtc_etsi.exc.STATUS_INTERNAL_SERVER_ERROR
except AttributeError:
self.logger.warning("No response for %s", method)
status_code = openmtc_etsi.exc.STATUS_INTERNAL_SERVER_ERROR
if response and hasattr(response, "payload"):
raise ErrorResponseConfirmation(
statusCode=status_code,
primitiveType=method,
errorInfo=response.payload
or "<no further information available>")
else:
raise ErrorResponseConfirmation(
statusCode=status_code,
primitiveType=method,
errorInfo=response or "<no further information available>")
def _send_create(self, request_indication, path):
"""Serializes a CreateRequestIndication to a CoAP POST message and sends it using a CoapClient
:param request_indication: CreateRequestIndication to be processed
:param path: Resource path
:return: Corresponding CreateResponseConfirmation
"""
if request_indication.content_type:
data = request_indication.resource
else:
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
def handle_response(resp):
if resp.code >= 100:
self._raise_error("create", resp)
location = resp.findOption(8)
if location:
return CreateResponseConfirmation(location[0].value,
resp.payload)
else:
return CreateResponseConfirmation(resp.payload)
return self.client.post(
path, data, content_type=self.content_type).then(handle_response)
def _send_notify(self, request_indication, path):
"""Serializes a NotifyRequestIndication to a CoAP POST message and sends it using a CoapClient
:param request_indication: NotifyRequestIndication to be processed
:param path: Resource path
:return: Corresponding NotifyResponseConfirmation
"""
if request_indication.content_type:
data = request_indication.resource
else:
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
def handle_response(resp):
if resp.code >= 100:
self._raise_error("notify", resp)
return NotifyResponseConfirmation()
return self.client.post(
path, data, content_type=self.content_type).then(handle_response)
def _send_update(self, request_indication, path):
"""Serializes a UpdateRequestIndication to a CoAP POST message and sends it using a CoapClient
:param request_indication: UpdateRequestIndication to be processed
:param path: Resource path
:return: Corresponding UpdateResponseConfirmation
"""
if request_indication.content_type:
data = request_indication.resource
else:
data = self.__serializer.encode_values(request_indication.typename,
request_indication.resource)
def handle_response(resp):
if resp.code >= 100:
self._raise_error("update", resp)
return UpdateResponseConfirmation()
return self.client.put(
path, data, content_type=self.content_type).then(handle_response)
def _send_retrieve(self, request_indication, path):
"""Serializes a RetrieveRequestIndication to a CoAP GET message and sends it using a CoapClient
:param request_indication: RetrieveRequestIndication to be processed
:param path: Resource path
:return: Corresponding RetrieveResponseConfirmation
"""
# TODO: Accept must be set dynamically
self.logger.debug("send retrieve path %s" % path)
def handle_response(resp):
if resp.code >= 100:
self._raise_error("retrieve", resp)
if resp.code == VALID:
return RetrieveResponseConfirmation(None)
else:
d, ct = decode_result(request_indication.path, resp.payload,
resp.content_format)
return RetrieveResponseConfirmation(resource=d, content_type=ct)
return self.client.get(path, accept=50).then(handle_response)
def _send_delete(self, request_indication, path):
"""Serializes a DeleteRequestIndication to a CoAP DELETE message and sends it using a CoapClient
:param request_indication: DeleteRequestIndication to be processed
:param path: Resource path
:return: Corresponding DeleteResponseConfirmation
"""
def handle_response(resp):
if not resp or resp.code >= 100:
self._raise_error("delete", resp)
else:
return DeleteResponseConfirmation()
return self.client.delete(path).then(handle_response)
def create(self, path, resource):
"""Creates and serializes a CreateRequestIndication to a CoAP POST message and sends it using a CoapClient
:param path: Resource path
:param resource: Request payload
:return: Corresponding CreateResponseConfirmation
"""
return self.send_request_indication(
CreateRequestIndication(path, resource))
def update(self, resource, fields=()):
"""Creates and serializes a UpdateRequestIndication to a CoAP PUT message and sends it using a CoapClient
:param path: Resource path
:return: Corresponding UpdateResponseConfirmation
"""
return self.send_request_indication(
UpdateRequestIndication(resource.path, resource, fields=fields))
def retrieve(self, path):
"""Creates and serializes a RetrieveRequestIndication to a CoAP GET message and sends it using a CoapClient
:param path: Resource path
:return: Corresponding RetrieveResponseConfirmation
"""
return self.send_request_indication(RetrieveRequestIndication(path))
def delete(self, path):
"""Creates and serializes a DeleteRequestIndication to a CoAP DELETE message and sends it using a CoapClient
:param path: Resource path
:return: Corresponding DeleteResponseConfirmation
"""
return self.send_request_indication(DeleteRequestIndication(path))
Note that coap:// is mandatory here
"""
#client = CoapClient("coap://ns.tzi.org:61616")
client = CoapClient("coap://localhost:5684")
"""
Some example of requests, the return is always a promise object
1st param: ressource path
2nd param: payload
Optional params: 'content_type', 'max_age', 'uri_scheme', 'etag', 'uri_authority', 'location'
"""
#p=client.post("sink","data")
#p=client.put("rd?ep=test","data")
#p=client.delete("ressource_name")
p = client.post("rd?ep=node1<=4500&version=1&binding=U", "3/1/1, 4/1/2")
#p=client.post("rd?ep=node2<=9000&version=5&binding=UP","3/2/2")
p = client.get("rd?ep=node1")
#<=4500&version=1&binding=U"
#, content_type='JSON'
#This fails:
#p=client.get("mes")
#This works:
#p=client.get("res")
"""
Generic request format
Supported methods: GET POST PUT DELETE
"""
#p=client.request("GET","path")
#p=client.request("PUT","path","data")
"""
Processing of the Promise with a simple handler
