python_fullstack.md

ASGI (Asynchronous Server Gateway Interface) Specification

ASGI consists of two different components:

1. A protocol server, which terminates sockets and translates them into connections and per-connection event messages.
2. An application, which lives inside a protocol server, is instantiated once per connection, and handles event messages as they happen.

socket  ---> protocol server  ------->  application
                                event  
                                connection scope

ASGI connection:

1. A connection scope, which represents a protocol connection to a user and survives until the connection closes.
2. Events, which are sent to the application as things happen on the connection.

                              interface                         
  network protocol servers  <-------------> Python applications
(particularly web servers)

1. Implementations
   1. Servers Uvicorn:
      A fast ASGI server based on uvloop and httptools. Supports HTTP/1 and WebSockets.
   2. Application Frameworks Starlette:
      Starlette is a minimalist ASGI library for writing against basic but powerful Request and Response classes. Supports HTTP.