1 # ============LICENSE_START===============================================
2 # Copyright (C) 2020 Nordix Foundation. All rights reserved.
3 # ========================================================================
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
15 # ============LICENSE_END=================================================
25 from connexion import NoContent
26 from flask import Flask, escape, request, Response, make_response
27 from var_declaration import policy_instances, policy_status, callbacks, forced_settings, policy_fingerprint
28 from utils import calcFingerprint
30 # API Function: Get all policy ids
31 def get_all_policy_identities():
33 if ((r := check_modified_response()) is not None):
36 return (list(policy_instances.keys()), 200)
38 # API Function: Create or update a policy
39 def put_policy(policyId):
41 if ((r := check_modified_response()) is not None):
46 data = json.loads(data)
48 pjson=create_problem_json(None, "The policy is corrupt or missing.", 400, None, policyId)
49 return Response(json.dumps(pjson), 400, mimetype='application/problem+json')
53 if policyId in policy_instances.keys():
55 fpPrevious=calcFingerprint(policy_instances[policyId])
57 fp=calcFingerprint(data)
58 if (fp in policy_fingerprint.keys()):
59 id=policy_fingerprint[fp]
61 pjson=create_problem_json(None, "The policy json already exists.", 400, None, policyId)
62 return Response(json.dumps(pjson), 400, mimetype='application/problem+json')
64 if (fpPrevious is not None):
65 del policy_fingerprint[fpPrevious]
67 policy_fingerprint[fp]=policyId
69 noti=request.args.get('notificationDestination')
70 callbacks[policyId]=noti
72 policy_instances[policyId]=data
74 ps["enforceStatus"] = "UNDEFINED"
75 policy_status[policyId]=ps
78 return Response(json.dumps(data), 200, mimetype='application/json')
81 headers['Location']='/A1-P/v1/policies/' + policyId
82 return Response(json.dumps(data), 201, headers=headers, mimetype='application/json')
84 # API Function: Get a policy
85 def get_policy(policyId):
87 if ((r := check_modified_response()) is not None):
90 if policyId in policy_instances.keys():
91 return Response(json.dumps(policy_instances[policyId]), 200, mimetype='application/json')
93 pjson=create_problem_json(None, "The requested policy does not exist.", 404, None, policyId)
94 return Response(json.dumps(pjson), 404, mimetype='application/problem+json')
96 # API Function: Delete a policy
97 def delete_policy(policyId):
99 if ((r := check_modified_response()) is not None):
102 if policyId in policy_instances.keys():
103 fpPrevious=calcFingerprint(policy_instances[policyId])
104 policy_fingerprint.pop(fpPrevious)
105 policy_instances.pop(policyId)
106 policy_status.pop(policyId)
107 callbacks.pop(policyId)
108 return Response('', 204, mimetype='application/json')
110 pjson=create_problem_json(None, "The policy identity does not exist.", 404, "No policy instance has been deleted.", policyId)
111 return Response(json.dumps(pjson), 404, mimetype='application/problem+json')
113 # API Function: Get status for a policy
114 def get_policy_status(policyId):
116 if ((r := check_modified_response()) is not None):
119 if policyId in policy_instances.keys():
120 return Response(json.dumps(policy_status[policyId]), status=200, mimetype='application/json')
122 pjson=create_problem_json(None, "The policy identity does not exist.", 404, "There is no existing policy instance with the identity: " + policyId, policyId)
123 return Response(json.dumps(pjson), 404, mimetype='application/problem+json')
125 # Helper: Create a response object if forced http response code is set
126 def get_forced_response():
127 if (forced_settings['code'] is not None):
128 pjson=create_error_response(forced_settings['code'])
129 forced_settings['code']=None
130 return Response(json.dumps(pjson), pjson['status'], mimetype='application/problem+json')
133 # Helper: Delay if delayed response code is set
135 if (forced_settings['delay'] is not None):
137 val=int(forced_settings['delay'])
143 # Helper: Check if response shall be delayed or a forced response shall be sent
144 def check_modified_response():
146 return get_forced_response()
148 # Helper: Create a problem json object
149 def create_problem_json(type_of, title, status, detail, instance):
152 if type_of is not None:
153 error["type"] = type_of
154 if title is not None:
155 error["title"] = title
156 if status is not None:
157 error["status"] = status
158 if detail is not None:
159 error["detail"] = detail
160 if instance is not None:
161 error["instance"] = instance
164 # Helper: Create a problem json based on a generic http response code
165 def create_error_response(code):
168 return(create_problem_json(None, "Bad request", 400, "Object in payload not properly formulated or not related to the method", None))
170 return(create_problem_json(None, "Not found", 404, "No resource found at the URI", None))
172 return(create_problem_json(None, "Method not allowed", 405, "Method not allowed for the URI", None))
174 return(create_problem_json(None, "Conflict", 409, "Request could not be processed in the current state of the resource", None))
176 return(create_problem_json(None, "Too many requests", 429, "Too many requests have been sent in a given amount of time", None))
178 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))
180 return(create_problem_json(None, "Service unavailable", 503, "The provider is currently unable to handle the request due to a temporary overload", None))
182 return(create_problem_json(None, "Unknown", code, "Not implemented response code", None))