The nature of the Python web framework

WSGI (Web server Gateway Interface) is a specification that defines the interface format between Web apps and Web servers written in Python, enabling decoupling between Web apps and Web servers.

The standalone WSGI server provided by the Python standard library is called Wsgiref.

1  fromWsgiref.simple_serverImportMake_server2  3  4 defrunserver (environ, start_response):5Start_response ('OK', [('Content-type','text/html')])6     return[Bytes ('', encoding='Utf-8'), ]7  8  9 if __name__=='__main__':Tenhttpd = Make_server ("', 8000, Runserver) One     Print("serving HTTP on port 8000 ...") AHttpd.serve_forever ()

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Explanation of the origin of Environ parameters

Simply get the URL from the user input and process the request

1 #!usr/bin/env python2 #-*-coding:utf-8-*-3 4 #Wsgiref followed the WSGI specification, the internal help us to achieve the socket,5  fromWsgiref.simple_serverImportMake_server6 7 defnew ():8F=open ("reg.html","R")9Data=F.read ()Ten f.close () One     returnData A defindex (): -     return "Index" -urls={ the     "/new": New, -     "/index": Index, - } - defrunserver (environ, start_response): +Start_response ('OK', [('Content-type','text/html')]) -url=environ['Path_info'] +     ifurl=="/index": Aret=index () at     elif: url=="/new" -ret=New () -     Else: -ret="404" -     returnret - if __name__=='__main__': inhttpd = Make_server ("', 8000, Runserver) -Httpd.serve_forever ()

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This kind of writing business logic is very bad, once the URL is many, it is very troublesome, improve as follows:

1 #!usr/bin/env python2 #-*-coding:utf-8-*-3 4 #Wsgiref followed the WSGI specification, the internal help us to achieve the socket,5  fromWsgiref.simple_serverImportMake_server6 7 defnew ():8F=open ("reg.html","R")9Data=F.read ()Ten f.close () One     returnData A defindex (): -     return "Index" -urls={ the     "/new": New, -     "/index": Index, - } - defrunserver (environ, start_response): +Start_response ('OK', [('Content-type','text/html')]) -url=environ['Path_info'] +     ifUrlinchUrls.keys (): AFunc_name=Urls[url] atret=Func_name () -     Else: -ret="404" -     returnret - if __name__=='__main__': -httpd = Make_server ("', 8000, Runserver) inHttpd.serve_forever ()

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Files are processed in order to step into the individual files of the management web framework

In fact, both the MVC and the MTV idea are to classify each file and perform each task.

Mvc

Models: Data-related operations

Views: template HTML file

Controllers business logic

Mtv

Models: Data-related operations

Temp;ates: Template HTML file

Views business logic

The nature of the Python web framework