What functions and capabilities does the SGI server provide?

SGI Server (Server Gateway Interface) is an interface between a web server and a Python application that allows processing HTTP requests.

Main functions and capabilities of the SGI server:

• Processing HTTP requests: the server receives requests from clients and forwards them to the Python application.
• Passing environment and data: the server creates an environment dictionary (environ) containing request information and passes it to the application.
• Receiving responses from the application: the application returns status, headers, and response body, which the server sends to the client.
• Support for multithreading and multiprocessing: the server can handle multiple requests simultaneously.

Example of a simple WSGI application:

def application(environ, start_response):
    start_response('200 OK', [('Content-Type', 'text/plain')])
    return [b"Hello, World!"]

Thus, the SGI server provides a standard way of interaction between web servers and Python applications, enabling the creation of portable and scalable web applications.