X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=near-rt-ric-simulator%2Fsrc%2FSTD_2.0.0%2Fa1.py;fp=near-rt-ric-simulator%2Fsrc%2FSTD_2.0.0%2Fa1.py;h=28eccc66a5f3d4a27edf81d6e9c33d23e90718f5;hb=e220bfc2cb1727996da2fe120b676a9454cf982e;hp=2dc7b5531e80590ad8fdeda3cb3ace2e9a5a525b;hpb=2b8adeb97b5c8ad8a769ec0018056b1b2f20e877;p=sim%2Fa1-interface.git diff --git a/near-rt-ric-simulator/src/STD_2.0.0/a1.py b/near-rt-ric-simulator/src/STD_2.0.0/a1.py index 2dc7b55..28eccc6 100644 --- a/near-rt-ric-simulator/src/STD_2.0.0/a1.py +++ b/near-rt-ric-simulator/src/STD_2.0.0/a1.py @@ -15,12 +15,14 @@ # ============LICENSE_END================================================= # +import os import copy import datetime import json import logging import collections import time +import requests from connexion import NoContent from flask import Flask, escape, request, Response, make_response @@ -33,6 +35,9 @@ from maincommon import check_apipath, apipath, get_supported_interfaces_response APPL_JSON='application/json' APPL_PROB_JSON='application/problem+json' +EXT_SRV_URL=os.getenv('EXT_SRV_URL') + + # API Function: Get all policy type ids def get_all_policy_types(): @@ -127,6 +132,14 @@ def put_policy(policyTypeId, policyId): pjson=create_problem_json(None, "Duplicate, the policy json already exists.", 400, None, policy_id) return Response(json.dumps(pjson), 400, mimetype=APPL_PROB_JSON) + #Callout hooks for external server + #When it fails, break and return 419 HTTP status code + if (EXT_SRV_URL is not None): + resp = callout_external_server(policy_id, data, 'PUT') + if (resp != retcode): + pjson=create_error_response(resp) + return Response(json.dumps(pjson), 500, mimetype=APPL_PROB_JSON) + if (fp_previous is not None): del policy_fingerprint[fp_previous] @@ -171,7 +184,6 @@ def get_policy(policyTypeId, policyId): return Response(json.dumps(policy_instances[policy_type_id][policy_id]), 200, mimetype=APPL_JSON) - # API Function: Delete a policy def delete_policy(policyTypeId, policyId): @@ -191,6 +203,14 @@ def delete_policy(policyTypeId, policyId): pjson=create_problem_json(None, "The requested policy does not exist.", 404, None, policy_id) return Response(json.dumps(pjson), 404, mimetype=APPL_PROB_JSON) + #Callout hooks for external server + #When it fails, break and return 419 HTTP status code + if (EXT_SRV_URL is not None): + resp = callout_external_server(policy_id, None, 'DELETE') + if (resp != 204): + pjson=create_error_response(resp) + return Response(json.dumps(pjson), 500, mimetype=APPL_PROB_JSON) + if (is_duplicate_check()): fp_previous=calcFingerprint(policy_instances[policy_type_id][policy_id], policy_type_id) else: @@ -202,7 +222,6 @@ def delete_policy(policyTypeId, policyId): callbacks.pop(policy_id) return Response('', 204, mimetype=APPL_JSON) - # API Function: Get status for a policy def get_policy_status(policyTypeId, policyId): @@ -224,16 +243,37 @@ def get_policy_status(policyTypeId, policyId): return Response(json.dumps(policy_status[policy_id]), status=200, mimetype=APPL_JSON) +# Helper: Callout external server to notify it for policy operations +# Returns 200, 201 and 204 for the success callout hooks, for the others returns 419 +def callout_external_server(policy_id, payload, operation): + + target_url=EXT_SRV_URL + policy_id + try: + if (operation == 'PUT'): + #Suppress error when self-signed certificate is being used with verify flag + resp=requests.put(target_url, json=payload, timeout=10, verify=False) + return resp.status_code + elif (operation == 'DELETE'): + resp=requests.delete(target_url, timeout=10, verify=False) + return resp.status_code + except Exception: + #Return a generic unassigned HTTP status code as per iana, for all exceptions (419:Callout failed) + #https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml + return 419 + # Helper: Create a response object if forced http response code is set def get_forced_response(): + if (forced_settings['code'] is not None): - pjson=create_error_response(forced_settings['code']) + value=forced_settings['code'] + pjson=create_error_response(int(value)) forced_settings['code']=None return Response(json.dumps(pjson), pjson['status'], mimetype=APPL_PROB_JSON) return None # Helper: Delay if delayed response code is set def do_delay(): + if (forced_settings['delay'] is not None): try: val=int(forced_settings['delay']) @@ -243,6 +283,7 @@ def do_delay(): # Helper: Check if response shall be delayed or a forced response shall be sent def check_modified_response(): + do_delay() return get_forced_response() @@ -265,19 +306,21 @@ def create_problem_json(type_of, title, status, detail, instance): # Helper: Create a problem json based on a generic http response code def create_error_response(code): - if code == '400': + if (code == 400): return(create_problem_json(None, "Bad request", 400, "Object in payload not properly formulated or not related to the method", None)) - elif code == '404': + elif (code == 404): return(create_problem_json(None, "Not found", 404, "No resource found at the URI", None)) - elif code == '405': + elif (code == 405): return(create_problem_json(None, "Method not allowed", 405, "Method not allowed for the URI", None)) - elif code == '409': + elif (code == 409): return(create_problem_json(None, "Conflict", 409, "Request could not be processed in the current state of the resource", None)) - elif code == '429': + elif (code == 419): + return(create_problem_json(None, "Callout failed", 419, "Callout hooks could not be processed on the external server", None)) + elif (code == 429): return(create_problem_json(None, "Too many requests", 429, "Too many requests have been sent in a given amount of time", None)) - elif code == '507': + elif (code == 507): return(create_problem_json(None, "Insufficient storage", 507, "The method could not be performed on the resource because the provider is unable to store the representation needed to successfully complete the request", None)) - elif code == '503': + elif (code == 503): return(create_problem_json(None, "Service unavailable", 503, "The provider is currently unable to handle the request due to a temporary overload", None)) else: return(create_problem_json(None, "Unknown", code, "Not implemented response code", None))