forked from GoogleCloudPlatform/python-docs-samples
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmain.py
More file actions
78 lines (58 loc) · 2.48 KB
/
Copy pathmain.py
File metadata and controls
78 lines (58 loc) · 2.48 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
# Copyright 2020 Google, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# [START eventarc_pubsub_server]
import base64
import os
import cloudevents.exceptions as cloud_exceptions
from cloudevents.http import from_http
from flask import Flask, request
required_fields = ['Ce-Id', 'Ce-Source', 'Ce-Type', 'Ce-Specversion']
app = Flask(__name__)
# [END eventarc_pubsub_server]
# [START eventarc_pubsub_handler]
@app.route('/', methods=['POST'])
def index():
# Create CloudEvent from HTTP headers and body
try:
event = from_http(request.headers, request.get_data())
except cloud_exceptions.MissingRequiredFields as e:
print(f"cloudevents.exceptions.MissingRequiredFields: {e}")
return "Failed to find all required cloudevent fields. ", 400
except cloud_exceptions.InvalidStructuredJSON as e:
print(f"cloudevents.exceptions.InvalidStructuredJSON: {e}")
return "Could not deserialize the payload as JSON. ", 400
except cloud_exceptions.InvalidRequiredFields as e:
print(f"cloudevents.exceptions.InvalidRequiredFields: {e}")
return "Request contained invalid required cloudevent fields. ", 400
envelope = event.data
if not envelope:
msg = 'no Pub/Sub message received'
print(f'error: {msg}')
return f'Bad Request: {msg}', 400
if not isinstance(envelope, dict) or 'message' not in envelope:
msg = 'invalid Pub/Sub message format'
print(f'error: {msg}')
return f'Bad Request: {msg}', 400
pubsub_message = envelope['message']
name = 'World'
if isinstance(pubsub_message, dict) and 'data' in pubsub_message:
name = base64.b64decode(pubsub_message['data']).decode('utf-8').strip()
resp = f"Hello, {name}! ID: {event['id']}"
print(resp)
return (resp, 200)
# [END eventarc_pubsub_handler]
# [START eventarc_pubsub_server]
if __name__ == "__main__":
app.run(debug=True, host='0.0.0.0', port=int(os.environ.get('PORT', 8080)))
# [END eventarc_pubsub_server]