Web Framework Introduction

First, the nature of web framework

• All Web applications are essentially sockets, and the user's browser is actually a socket client.
• Common web Frameworks in Python are:
  • Django
  • Flask
  • web.py
• WSGI (Web server Gateway Interface) defines the interface format between Web apps and Web servers that are programmed with Python, enabling decoupling between the server and the client.
• The standalone WSGI server provided by the Pytho Standard library is known as wsgired.

Ii. using wsgrired to customize the web framework

#!/usr/local/bin/python3#-*-coding:utf-8-*-#Author:felix Song; Environment:pycharm 5.0.3 (python3.6)#develop a web framework of your own using the Python standard library fromWsgiref.simple_serverImportMake_server#Second Step transformation, get the content in ConfImportConf_urldefRunserver (environ,start_response): Start_response ('OK',[('Content-type','text/html')])    #The first step, get the user url,debug mode, in Start_response plus breakpoint, then browser access in variables under the Environ findUserurl = environ['Path_info']    Print(userurl) urlpatterns= Conf_url.routes ()#Third Step Transformation    #Second Step transformationFunc =None#For item in Conf_url.url: #第三步注释掉     forIteminchUrlpatterns:#Third Step Transformation        ifItem[0] = =Userurl:func= Item[1]             Break    iffunc:returnfunc ()Else:        return[Bytes ('', encoding='Utf-8')]    " "#第二步, different values are returned depending on the URL input, but if the page is much more laborious with the if else ... Under renovation, create a new conf.py inside define all the URL models if Userurl = = '/index/': return [bytes (' " "if __name__=='__main__': httpd= Make_server ("', 8000, Runserver)Print('serving HTTP on port 8000 ...') Httpd.serve_forever ()

Server

#!/usr/local/bin/python3#-*-coding:utf-8-*-#Author:felix Song; Environment:pycharm 5.0.3 (python3.6)defindex ():return[Bytes ('', encoding='Utf-8')]    #return [b ' deflogin ():return[Bytes ('', encoding='Utf-8')]#Third step transformation, routing systemdefroutes (): Urlpatterns= (('/index', index), ('/index', index), ('/index', index)) returnUrlpatterns##第二步改造, Web page comparison#URL = (#('/index ', index),#('/index ', index),#('/index ', index),# )

Conf_url

III. MVC Framework (collation of code)

Model package: Working with databases

View package: Storing HTML files

Login.html:

Controller package: Business logic processing

account.py: Account-related controls are here

admin.py: Background Management

IV. MTV Framework (Classification of code)

Model Package: Operations on the database

Template package: Storing HTML files

View Package: Business logic

Reference:

Http://www.cnblogs.com/wupeiqi/articles/4491246.html

Http://www.cnblogs.com/wupeiqi/articles/5237672.html

Web Framework Introduction