httsleep

httsleep is a powerful polling library for Python.

Idea

Set your success conditions, set a few alarms, and get polling!

until = {
    'status_code': 200,
    'jsonpath': [{'expression': 'status', 'value': 'OK'}]
}
alarms = [
    {'json': {'status': 'ERROR'}},
    {'jsonpath': [{'expression': 'status', 'value': 'UNKNOWN'},
                  {'expression': 'owner', 'value': 'Chris'}],
    'callback': is_job_really_failing},
    {'status_code': 404}
]
try:
   response = httsleep(
       'http://myendpoint/jobs/1', until, alarms=alarms,
       max_retries=20)
except Alarm as e:
    print "Response was:", e.response
    print "Alarm condition that matched was:", e.alarm

Translated into English, this means:

• Poll http://myendpoint/jobs/1 -- at most 20 times -- until
  • it returns a status code of 200
  • AND the status key in its response has the value OK
• but raise an alarm if
  • the status key has the value ERROR
  • OR the status key has the value UNKNOWN AND the owner key has the value Chris AND the function is_job_really_dying returns True
  • OR the status code is 404

Documentation

http://httsleep.readthedocs.io/

Installing

pip install httsleep

Testing

pip install -e .
pip install -r test-requirements.txt
py.test