Run Python HTTPServer in Background and Continue Script Execution

Question

I am trying to figure out how to run my overloaded customized BaseHTTPServer instance in the background after running the "".serve_forever() method.

Normally when you run the method execution will hang until you execute a keyboard interrupt, but I would like it to serve requests in the background while continuing script execution. Please help!

score 16 · Answer 1 · edited May 19 '23 at 16:45

You can start the server in a different thread: https://docs.python.org/3/library/_thread.html#thread.start_new_thread

So something like:

import _thread as thread

def start_server():
    # Setup stuff here...
    server.serve_forever()
    
# start the server in a background thread
thread.start_new_thread(start_server, ())
    
print('The server is running but my script is still executing!')

score 2 · Answer 2 · answered Oct 25 '20 at 14:13

I was trying to do some long-term animation using async and thought I'd have to rewrite server to use aiohttp (https://docs.aiohttp.org/en/v0.12.0/web.html), but Olivers technique of using seperate thread saved me all that pain. My code looks like this, where MyHTTPServer is simply my custom sublass of HTTPServer

import threading
import asyncio
from http.server import BaseHTTPRequestHandler, HTTPServer
import socketserver
import io
import threading

async def tick_async(server):        
    while True:
        server.animate_something()
        await asyncio.sleep(1.0)

def start_server():
    httpd.serve_forever()
    
try:
    print('Server listening on port 8082...')

    httpd = MyHTTPServer(('', 8082), MyHttpHandler)
    asyncio.ensure_future(tick_async(httpd))
    loop = asyncio.get_event_loop()
    t = threading.Thread(target=start_server)
    t.start()
    loop.run_forever()

Run Python HTTPServer in Background and Continue Script Execution

2 Answers2

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