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502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 Service Unavailable The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state. [26] 504 Gateway Timeout
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In computing, Common Gateway Interface (CGI) is an interface specification that enables web servers to execute an external program to process HTTP or HTTPS user requests. Such programs are often written in a scripting language and are commonly referred to as CGI scripts , but they may include compiled programs.
Example scenario: A client on the Internet (cloud on the left) makes a request to a reverse proxy server (red oval in the middle).The proxy inspects the request, determines that it is valid and that it does not have the requested resource in its own cache.
the server/gateway side. This is often running full web server software such as Apache or Nginx, or is a lightweight application server that can communicate with a webserver, such as flup. the application/framework side. This is a Python callable, supplied by the Python program or framework.
Server Side Includes (SSI) is a simple interpreted server-side scripting language used almost exclusively for the World Wide Web.It is most useful for including the contents of one or more files into a web page on a web server (see below), using its #include directive.
OpenResty is an nginx distribution which includes the LuaJIT interpreter for Lua scripts. [2] [3] The software was created by Yichun Zhang. It was originally sponsored by Taobao before 2011 and was mainly supported by Cloudflare from 2012 to 2016. Since 2017, it has been mainly supported by OpenResty Software Foundation and OpenResty Inc.