flask app for log server

flask.py

from flask import Flask, request, Response
import json
from pymongo import MongoClient
from datetime import datetime

client = MongoClient("mongodb://logging:password@lcoal:port/logging")
db = client['logging']
post = db.log
# set expire time  7 days, once setuped, couldn't change it again.
post.ensure_index("CreateDate", expireAfterSeconds= 7*24*60*60 ) 
utc_timestamp = datetime.utcnow()

app = Flask(__name__)

@app.route('/log',methods=['POST'])
def index():
  data = json.loads(json.dumps(request.form))
  data.update({"CreateDate": utc_timestamp})
  response = post.insert_one(data)
  print response.inserted_id, data
  return ""

if __name__ == '__main__':
  app.run(host='0.0.0.0', port = 5000, debug=False)