from SimpleHTTPServer import SimpleHTTPRequestHandler import SocketServer httpd = SocketServer.TCPServer((‘’, 8000), SimpleHTTPRequestHandler) httpd.serve_forever()

 CGI: Common Gateway Interface ◦ need to start a new process for every request  not recommened ◦ cgi, cgitb module  FastCGI, SCGI(a simpler FastCGI) ◦ uses preforked backgroundprocesses to handle requests  by imbedding interpreters into the web server CGI

 A standard interface between web server and web applications written in Python  WSGI application will work on any gateway interfaces: CGI, FastCGI, SCGI, mod_python, or mod_wsgi  mod_wsgi: a WSGI server in Apache web server (WCGI-compliant) ◦ embedded mode (integrated with Apache process) ◦ daemon mode which is FastCGI-like  wsgiref module ◦ A reference implementation of WSGI specification ◦ contains a small web server that can be used for testing

#!/usr/bin/env python from wsgiref.simple_server import make_server def application(environ, start_response): response_body = 'Hello, world!' status = '200 OK' response_headers = [('Content-Type', 'text/plain')] start_response(status, response_headers) return [response_body] # for testing only server = make_server('localhost', 8051, application) server.serve_forever()  Publishing ◦ upload this program to web server directory (after removing main statements) ◦ lo.py  Testing ◦ Run this program by lauching test server ◦ Enter URL on the browser   or hello.py:

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 MVC ◦ model: data to be displayed and modified ◦ view: display the data of the model to the user  typically implemented by templates ◦ controller  reacts to user actions  tells the model to modify the data, and tells the view code what to display  Frameworks for web app development in Python ◦ Django:  Google App Engine: a PaaS ◦