图解Web服务器网关接口WSGI(Web Server Gateway Interface) |
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1) web server
先看看webserver是什么? A web server is computer software and underlying hardware that accepts requests via HTTP, the network protocol created to distribute web pages 看见没 ,诸如apache, NGINX之类的web服务器,主要是在tcp之上,通过支持http协议来处理用户对静态网页的访问. 如果用户需要服务器端有处理复杂逻辑的功能,那么我们一般会实现一个application,来负责复杂逻辑部分的处理,如下图. 那么问题来了web服务器(如NGINX)怎么和我们实现的application进行交互呢? 此时就需要一个中间人WSGI(Web Server Gateway Interface)负责web server 和 Python application 之间的通信. Now, web server is able to send requests or communicate with WSGI containers. Likewise, Python application provides a callable object which contains certain functionalities that are invoked by WSGI application which are defined as per the PEP 3333 standard. There are multiple WSGI containers that are available today. Hence, a WSGI container is required to be installed in the project so that a web server can communicate to a WSGI container which further communicates to the Python application and provides the response back accordingly. Finally, when the web server obtains the response, it is sent back to the web browser/users. |
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