def parse_core_link_format(self, link_format, base_path, remote_server):
while len(link_format) > 0:
pattern = "<([^>]*)>;"
result = re.match(pattern, link_format)
path = result.group(1)
path = path.split("/")
path = path[1:][0]
link_format = link_format[result.end(1) + 2:]
pattern = "([^<,])*"
result = re.match(pattern, link_format)
attributes = result.group(0)
dict_att = {}
if len(attributes) > 0:
attributes = attributes.split(";")
for att in attributes:
a = att.split("=")
# TODO check correctness
dict_att[a[0]] = a[1]
link_format = link_format[result.end(0) + 1:]
# TODO handle observing
resource = RemoteResource('server',
remote_server,
path,
coap_server=self,
visible=True,
observable=False,
allow_children=True)
resource.attributes = dict_att
self.add_resource(base_path + "/" + path, resource)
logger.info(self.root.dump())
def parse_core_link_format(self, link_format, base_path, remote_server):
while len(link_format) > 0:
pattern = "<([^>]*)>;"
result = re.match(pattern, link_format)
path = result.group(1)
path = path.split("/")
path = path[1:][0]
link_format = link_format[result.end(1) + 2:]
pattern = "([^<,])*"
result = re.match(pattern, link_format)
attributes = result.group(0)
dict_att = {}
if len(attributes) > 0:
attributes = attributes.split(";")
for att in attributes:
a = att.split("=")
# TODO check correctness
dict_att[a[0]] = a[1]
link_format = link_format[result.end(0) + 1:]
# TODO handle observing
resource = RemoteResource('server', remote_server, path, coap_server=self, visible=True, observable=False,
allow_children=True)
resource.attributes = dict_att
self.add_resource(base_path + "/" + path, resource)
logger.info(self.root.dump())
def parse_core_link_format(self, link_format, base_path, remote_server):
"""
Parse discovery results.
:param link_format: the payload of the response to the discovery request
:param base_path: the base path used to create child resources discovered on the remote server
:param remote_server: the (ip, port) of the remote server
"""
while len(link_format) > 0:
pattern = "<([^>]*)>;"
result = re.match(pattern, link_format)
path = result.group(1)
path = path.split("/")
path = path[1:][0]
link_format = link_format[result.end(1) + 2:]
pattern = "([^<,])*"
result = re.match(pattern, link_format)
attributes = result.group(0)
dict_att = {}
if len(attributes) > 0:
attributes = attributes.split(";")
for att in attributes:
a = att.split("=")
if len(a) > 1:
dict_att[a[0]] = a[1]
else:
dict_att[a[0]] = a[0]
link_format = link_format[result.end(0) + 1:]
# TODO handle observing
resource = RemoteResource('server', remote_server, path, coap_server=self, visible=True, observable=False,
allow_children=True)
resource.attributes = dict_att
self.add_resource(base_path + "/" + path, resource)
logger.info(self.root.dump())
def parse_core_link_format(self, link_format, base_path, remote_server):
"""
Parse discovery results.
Overridden for
ignore defined resource instances
remove bad attribute keys in discovered resources
:param link_format: the payload of the response to the discovery request
:param base_path: the base path used to create child resources discovered on the remote server
:param remote_server: the (ip, port) of the remote server
"""
from defines import ignored_resources, resource_name_attribute
while len(link_format) > 0:
pattern = "<([^>]*)>;"
result = re.match(pattern, link_format)
path = result.group(1)
path = path.split("/")
path = path[1:][0]
link_format = link_format[result.end(1) + 2:]
pattern = "([^<,])*"
result = re.match(pattern, link_format)
attributes = result.group(0)
dict_att = {}
if len(attributes) > 0:
attributes = attributes.split(";")
for att in attributes:
a = att.split("=")
if len(a) > 1:
dict_att[a[0]] = a[1]
else:
dict_att[a[0]] = a[0]
link_format = link_format[result.end(0) + 1:]
# TODO handle observing
# filter resources in ignored_resources
if resource_name_attribute in dict_att.keys():
if_val = dict_att[resource_name_attribute]
if_val = if_val[1:-1] if if_val.startswith('\"') else if_val
if if_val in ignored_resources:
logger.info("Ignoring res=" + str(path) + " at " + str(remote_server))
continue
# remove bad keys
for key in dict_att.keys():
if key not in defines.corelinkformat.keys():
dict_att.pop(key)
resource = RemoteResource('server', remote_server, path, coap_server=self, visible=True, observable=False,
allow_children=True)
resource.attributes = dict_att
self.add_resource(base_path + "/" + path, resource)
logger.info(self.root.dump())
def _handle_request(self, transaction, new_resource):
"""
Forward requests. Used by reverse proxies to also create new virtual resources on the proxy
in case of created resources
:type new_resource: bool
:type transaction: Transaction
:param transaction: the transaction that owns the request
:rtype : Transaction
:param new_resource: if the request will generate a new resource
:return: the edited transaction
"""
client = HelperClient(transaction.resource.remote_server)
request = Request()
request.options = copy.deepcopy(transaction.request.options)
del request.block2
del request.block1
del request.uri_path
del request.proxy_uri
del request.proxy_schema
# TODO handle observing
del request.observe
# request.observe = transaction.request.observe
request.uri_path = "/".join(
transaction.request.uri_path.split("/")[1:])
request.destination = transaction.resource.remote_server
request.payload = transaction.request.payload
request.code = transaction.request.code
logger.info("forward_request - " + str(request))
response = client.send_request(request)
client.stop()
logger.info("forward_response - " + str(response))
transaction.response.payload = response.payload
transaction.response.code = response.code
transaction.response.options = response.options
if response.code == defines.Codes.CREATED.number:
lp = transaction.response.location_path
del transaction.response.location_path
transaction.response.location_path = transaction.request.uri_path.split(
"/")[0] + "/" + lp
# TODO handle observing
if new_resource:
resource = RemoteResource('server',
transaction.resource.remote_server,
lp,
coap_server=self,
visible=True,
observable=False,
allow_children=True)
self._server.add_resource(transaction.response.location_path,
resource)
if response.code == defines.Codes.DELETED.number:
del self._server.root["/" + transaction.request.uri_path]
return transaction
def parse_core_link_format(self, link_format, base_path, remote_server):
"""
Parse discovery results.
:param link_format: the payload of the response to the discovery request
:param base_path: the base path used to create child resources discovered on the remote server
:param remote_server: the (ip, port) of the remote server
"""
while len(link_format) > 0:
pattern = "<([^>]*)>;"
result = re.match(pattern, link_format)
path = result.group(1)
path = path.split("/")
path = path[1:][0]
link_format = link_format[result.end(1) + 2:]
pattern = "([^<,])*"
result = re.match(pattern, link_format)
attributes = result.group(0)
dict_att = {}
if len(attributes) > 0:
attributes = attributes.split(";")
for att in attributes:
a = att.split("=")
if len(a) > 1:
dict_att[a[0]] = a[1]
else:
dict_att[a[0]] = a[0]
link_format = link_format[result.end(0) + 1:]
# TODO handle observing
resource = RemoteResource('server',
remote_server,
path,
coap_server=self,
visible=True,
observable=False,
allow_children=True)
resource.attributes = dict_att
self.add_resource(base_path + "/" + path, resource)
logger.info(self.root.dump())
def _handle_request(self, transaction, new_resource):
client = HelperClient(transaction.resource.remote_server)
request = Request()
request.options = copy.deepcopy(transaction.request.options)
del request.block2
del request.block1
del request.uri_path
del request.proxy_uri
del request.proxy_schema
# TODO handle observing
del request.observe
# request.observe = transaction.request.observe
request.uri_path = "/".join(
transaction.request.uri_path.split("/")[1:])
request.destination = transaction.resource.remote_server
request.payload = transaction.request.payload
request.code = transaction.request.code
response = client.send_request(request)
client.stop()
transaction.response.payload = response.payload
transaction.response.code = response.code
transaction.response.options = response.options
if response.code == defines.Codes.CREATED.number:
lp = transaction.response.location_path
del transaction.response.location_path
transaction.response.location_path = transaction.request.uri_path.split(
"/")[0] + "/" + lp
# TODO handle observing
if new_resource:
resource = RemoteResource('server',
transaction.resource.remote_server,
lp,
coap_server=self,
visible=True,
observable=False,
allow_children=True)
self._server.add_resource(transaction.response.location_path,
resource)
if response.code == defines.Codes.DELETED.number:
del self._server.root["/" + transaction.request.uri_path]
return transaction
def discover_remote_results(self, response, name):
"""
Create a new remote server resource for each valid discover response.
:param response: the response to the discovery request
:param name: the server name
"""
host, port = response.source
if response.code == defines.Codes.CONTENT.number:
resource = RemoteResource('server', (host, port),
"/",
coap_server=self,
visible=True,
observable=False,
allow_children=True)
self.add_resource(name, resource)
self._mapping[name] = (host, port)
self.parse_core_link_format(response.payload, name, (host, port))
else:
logger.error("Server: " + response.source + " isn't valid.")
