def check(self, service_path):
"""
Check if subscription exists or not
@param service_path : service path to check the notification from
@return True if subscription already exists. Return False otherwise
"""
url = FcbgConfig.FIWARE_SUBSCRIPTION_URL
headers = {
"fiware-service": FcbgConfig.FIWARE_SUBSCRIPTION_SERVICE,
"fiware-servicepath": service_path,
"Content-type" : "application/json"
}
try:
client = FcbgHttpClient(headers, url, {}, "")
result = client.get()
if result.status_code not in [200, 201]:
raise FcbgException("Unable to get subscriptions from source CB. Response: " + str(result.status_code) + ", Reason: " + result.reason)
try:
subscriptions = json.loads(result.text)
if len(subscriptions) > 0:
return True
else:
return False
except:
raise FcbgException("Response from CB is not a JSON object:\n" + result.text)
except:
raise
def create(self, service_path):
"""
Create subscription on source CB
@param service_path : service path to get notifications from
"""
url = FcbgConfig.FIWARE_SUBSCRIPTION_URL
headers = {
"fiware-service": FcbgConfig.FIWARE_SUBSCRIPTION_SERVICE,
"fiware-servicepath": service_path,
"Content-type" : "application/json"
}
body = {
"description": "Full subscription to " + service_path,
"subject":
{
"condition" : {"attrs": []}
},
"notification":
{
"http": {"url": "http://localhost:1812/notify"},
"attrs": []
}
}
try:
client = FcbgHttpClient(headers, url, {}, body)
result = client.post()
if result.status_code not in [200, 201]:
raise FcbgException("Unable to create subscription on source CB. Response: " + str(result.status_code) + ", Reason: " + result.reason)
except:
raise
def create(self, entity):
"""
Create entity on target CB
@param entity : Entity object
"""
if "id" in entity and "type" in entity:
entity_str = entity["type"] + ":" + entity["id"]
# Create entity on target CB
url = FcbgConfig.FIWARE_TARGET_URL
headers = {
"fiware-service": FcbgConfig.FIWARE_TARGET_SERVICE,
"fiware-servicepath": FcbgConfig.FIWARE_TARGET_SERVICE_PATH,
"Content-type": "application/json",
'X-Auth-Token': self.auth_token
}
try:
client = FcbgHttpClient(headers, url, {}, json.dumps(entity))
result = client.post()
if result.status_code in [200, 201, 422]:
# Enter entity in memory
self.entities.append(entity_str)
else:
raise FcbgException(
"Unable to create entity on target CB. Response: " +
str(result.status_code) + ", Reason: " + result.reason)
except:
raise
def update_auth_token(self):
"""
Update auth token from target server
"""
url = FcbgConfig.FIWARE_AUTH_TOKEN_URL
payload = "{\"auth\": {\"identity\": {\"methods\": [\"password\"],\"password\": {\"user\": {\"domain\": {\"name\": \""
payload += FcbgConfig.FIWARE_TARGET_SERVICE + "\"},\"name\": \"" + FcbgConfig.FIWARE_TARGET_USER_NAME + "\",\"password\": \""
payload += FcbgConfig.FIWARE_TARGET_USER_PASSWORD + "\"}}},\"scope\": {\"project\": {\"domain\": {\"name\": \""
payload += FcbgConfig.FIWARE_TARGET_SERVICE + "\"},\"name\": \"" + FcbgConfig.FIWARE_TARGET_SERVICE_PATH + "\"}}}}"
headers = {'Content-Type': "application/json"}
threading.Timer(FcbgConfig.FIWARE_AUTH_TOKEN_INTERVAL,
self.update_auth_token).start()
try:
client = FcbgHttpClient(headers, url, {}, payload)
result = client.post()
if result.status_code in [200, 201]:
if "X-Subject-Token" in result.headers:
self.auth_token = result.headers["X-Subject-Token"]
else:
raise FcbgException(
"Unable to retrieve auth token from target server")
except:
raise
def patch(self):
"""
Run HTTP patch request
"""
try:
return requests.patch(self.url,
headers=self.header,
params=self.parameters,
data=self.payload,
verify=False)
except Exception as ex:
raise FcbgException(str(ex))
def update(self, entity):
"""
Update entity on target CB
@param entity : Entity object
"""
if "id" in entity and "type" in entity:
entity_str = entity["type"] + ":" + entity["id"]
# Entity in memory?
if entity_str in self.entities:
# OK, update entity on target CB
url = FcbgConfig.FIWARE_TARGET_URL + "/" + entity[
"id"] + "/attrs"
headers = {
"fiware-service": FcbgConfig.FIWARE_TARGET_SERVICE,
"fiware-servicepath":
FcbgConfig.FIWARE_TARGET_SERVICE_PATH,
"Content-type": "application/json",
'X-Auth-Token': self.auth_token
}
del entity["type"]
del entity["id"]
for field in entity:
if "metadata" in entity[field]:
del entity[field]["metadata"]
try:
client = FcbgHttpClient(headers, url, {},
json.dumps(entity))
result = client.patch()
if result.status_code not in [200, 201, 204]:
raise FcbgException(
"Unable to update entity on target CB. Response: "
+ str(result.status_code) + ", Reason: " +
result.reason)
except:
raise
else: # Entity not in memory
# Let's try to create it on the target CB
self.create(entity)