def next(key=None, user=None):
"""Responds with the milliseconds until the next image."""
try:
milliseconds = schedule.delay(user)
return text_response(str(milliseconds))
except ContentError as e:
exception('Failed to create next content: %s' % e)
return next_retry_response()
def next_retry_response():
"""Creates a response for a next request with a fixed retry time."""
return text_response(str(NEXT_RETRY_DELAY_MILLIS))