async_event_dispatcher.py

# Copyright 2016, Optimizely
# 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.

import json
import logging
import grequests

from requests import exceptions as request_exception
from optimizely.helpers import enums

REQUEST_TIMEOUT = 10

class AsyncEventDispatcher(object):

  @staticmethod
  def dispatch_event(event):
    """ Dispatch the event being represented by the Event object.

    Args:
      event: Object holding information about the request to be dispatched to the Optimizely backend.
    """

    try:
      if event.http_verb == enums.HTTPVerbs.GET:
        unsent_req = [grequests.get(event.url, params=event.params, timeout=REQUEST_TIMEOUT)]
        grequests.map(unsent_req)
      elif event.http_verb == enums.HTTPVerbs.POST:
        unsent_req = [grequests.post(event.url, data=json.dumps(event.params), headers=event.headers, timeout=REQUEST_TIMEOUT)]      
        grequests.map(unsent_req)
    except request_exception.RequestException as error:
      logging.error('Dispatch event failed. Error: %s' % str(error))

Not entirely certain what the prognosis is here, but these look relevant:

https://stackoverflow.com/questions/43444959/mysterious-error-when-using-django-server-with-grequests

gevent/gevent#585