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main.py
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main.py
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import os
import uuid
import functions_framework
from google.cloud import spanner
from flask import make_response
instance_name = os.environ['instance'].split('/')[-1]
database_name = os.environ['database'].split('/')[-1]
spanner_client = spanner.Client()
instance = spanner_client.instance(instance_name)
database = instance.database(database_name)
def write_to_database(id:str, vote:int):
with database.batch() as batch:
batch.insert(
table='votes',
columns=('id', 'vote'),
values=[(id, vote)],
)
def write_to_spanner(request):
if request and 'vote' in request:
id = str(uuid.uuid4())
vote = request['vote']
write_to_database(id, vote)
return '{"message": "OK"}'
else:
return '{"message": "ERROR"}'
@functions_framework.http
def upvote(request):
"""HTTP Cloud Function.
Args:
request (flask.Request): The request object.
<https://flask.palletsprojects.com/en/1.1.x/api/#incoming-request-data>
Returns:
The response text, or any set of values that can be turned into a
Response object using `make_response`
<https://flask.palletsprojects.com/en/1.1.x/api/#flask.make_response>.
"""
request_json = request.get_json(silent=True)
response = make_response(write_to_spanner(request_json))
response.headers['Access-Control-Allow-Origin'] = '*'
response.headers['Access-Control-Allow-Methods'] = 'POST, OPTIONS'
response.headers['Access-Control-Allow-Headers'] = 'Content-Type'
return response