Server And Client

Since asyncio is exceptional at handling thousands of network connections, it provides a useful framework for implementing network servers. The following example implements a simplistic TCP server, but it is up to you to build any network server you might like.

Note: It is possible to build an asyncio based Web server using aiohttp. However, it is not that useful in most cases because it will often be slower than a fast, optimized, native WSGI server like uwsgi or gunicorn. Beacuse Python Web applications are always using WSGI, it is easy to switch out the WSGI server for a fast and asynchronous one.

Asyncio server

Following is a simple example of a TCP server. This server listens for strings terminated by \n and returns them in upper case.

To run the following application (server), click Run and enter the command python asyncio-server.py.

To change the source code in the playground and run, click Run again after changing the code, ...