[FIXED] Asynchronous Python - fire and forget HTTP request

Issue

Not sure if that's achievable. I want to fire an HTTP POST request from a script, but not wait for a response. Instead I want to return immediately.

I tries something along these lines:

#!/usr/bin/env python3

import asyncio
import aiohttp

async def fire():
    await client.post('http://httpresponder.com/xyz')

async def main():
    asyncio.ensure_future(fire())

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    client = aiohttp.ClientSession(loop=loop)
    loop.run_until_complete(main())

The script returns immediately without errors, but the HTTP request never arrives at the destination. Can I fire the POST request, but not wait for response from the server, just terminate the moment the request is sent?

Solution

I have answered a rather similar question.

async def main():
    asyncio.ensure_future(fire())

ensure_future schedules coro execution, but does not wait for its completion and run_until_complete does not wait for the completion of all futures.

This should fix it:

async def main():
    await fire()

Answered By - Artemiy Rodionov