WSGI example

alternative_uwsgi_test.sh

uwsgi --http :8000 --wsgi-file simpleapp.py

simpleapp.py

# curl -X POST -d '{"hello":"world"}' -v localhost:8000 -H "Content-Type: application/json"
import json

def application(environ, start_response):  # <--- uwsgi expects this
    status = '200 OK'
    response_headers = [('Content-type', 'text/plain')]
    start_response(status, response_headers)
    for i,v in sorted(environ.items()):
        print(i,v)
    content_length = int(environ.get('CONTENT_LENGTH',0))
    content = environ['wsgi.input'].read(content_length)
    print("CONTENT = {}:{}".format(type(content),content_length))
    
    print(json.loads(content))
    return ['Hello world\n']

wsgi_test.py

from wsgiref.util import setup_testing_defaults
from wsgiref.simple_server import make_server
from simple_app import application

httpd = make_server('', 8000, application)
print "Serving on port 8000..."
httpd.serve_forever()

WSGI = give it something to call and get an iterable back.

You could also implement above with a class that implements an iter function instead of it being callable:

class SimplApp(object):
     def __init__ (self,environ, start_response):
              self.environ, self.start_response = environ, start_response
     def __iter__(self):
               ...
               yield ...

Effect is the same as the above function .

2 ways to configure wsgi based servers (internal python wsgi OR uwsgi (c-implemented)

you can actually pip install uwsgi as well!