[Web] WSGI (Web Server Gateway Interface)

WSGI (Web Server Gateway Interface) is an interface specification between web server and Python web frameworks/applications, and forward requests from web servers to web frameworks/applications.

Gunicorn

• Gunicorn is one of WSGI server, so that it can run Python web applications which implement the WSGI specification.
• Manage running multiple instances of web application, and make sure the instances are healthy and restart them if needed.
• Distribute incoming requests between instances of web application, and communicate with the web server.