simple_server
Among others, wsgiref.simple_server exports WSGIServer and WSGIRequestHandler which allow to test a WSGI appliction.
In the following example, the WSGI application is implemented with the callable (function) app. The application simply writes the Hello World! followed by a line that reveals the value of the environment variable PATH_INFO:
#!/usr/bin/env python3
from wsgiref.simple_server import WSGIServer, WSGIRequestHandler
def app(environ, start_response):
start_response(
'200 OK',
[('Content-Type', 'text/plain; charset=utf-8')]
)
#
# The application callable returns an iterable yielding zero or more bytestrings:
#
return [
'Hello world!\n' .encode('utf-8'),
f'Serving {environ["PATH_INFO"]}'.encode('utf-8')
]
host = '' # Localhost?
port = 1234
wsgiServer = WSGIServer( (host,port) , WSGIRequestHandler )
wsgiServer.set_app(app)
wsgiServer.serve_forever()