Google Drive API Webhook - python-3.x

Question

I have set up a google drive webhook through the "watch property"(https://developers.google.com/drive/api/v2/reference/files/watch) and it is working well and submitting a response as soon as any changes are detected on the watch file. However, the request body (i.e.posted_data=request.get_data( )) as below comes back empty (i.e. None). I have tried other options such as request.json but still empty. Does anyone have any ideas on what I am possibly doing wrong? My Python Flask webhook code is below and works well (i.e. any file updates are posted) except that it returns an empty data type (i.e.posted_data=request.get_data( ) is None). Any suggestions are highly appreciated!
from datetime import datetime
from flask import Flask, request, jsonify
import pytz
def get_timestamp():
dt=datetime.now(pytz.timezone('US/Central'))
return dt.strftime(("%Y-%m-%d %H:%M:%S"))
app = Flask(__name__)
#app.route('/webhook', methods=['POST','GET'])
def webhook():
if request.method=='GET':
return '<h1> This is a webhook listener!</h1>'
if request.method == 'POST':
posted_data=request.get_data( )
print("We have received a request =====>",posted_data)
cur_date=get_timestamp()
print("Date and time of update ====>",cur_date)
http_status=jsonify({'status':'success'}),200
else:
http_status='',400
return http_status
if __name__ == '__main__':
app.run(port=5000)

Answer 1

The above code works except that google will post their response as headers (i.e. request.headers). See updated code below.
from datetime import datetime
from flask import Flask, request, jsonify
import pytz
def get_timestamp():
dt=datetime.now(pytz.timezone('US/Central'))
return dt.strftime(("%Y-%m-%d %H:%M:%S"))
app = Flask(__name__)
#app.route('/webhook', methods=['POST','GET'])
def webhook():
if request.method=='GET':
return '<h1> This is a webhook listener!</h1>'
if request.method == 'POST':
print(request.headers)
cur_date=get_timestamp()
print("Date and time of update ====>",cur_date)
http_status=jsonify({'status':'success'}),200
else:
http_status='',400
return http_status
if __name__ == '__main__':
app.run(port=5000)