Writing a chat application in Django 4.2 using async StreamingHttpResponse, Server-Sent Events and PostgreSQL LISTEN/NOTIFY

Writing a chat application in Django 4.2 using async StreamingHttpResponse, Server-Sent Events and PostgreSQL LISTEN/NOTIFY

Excellent tutorial by Víðir Valberg Guðmundsson on implementing chat with server-sent events using the newly async-capable StreamingHttpResponse from Django 4.2x.

He uses PostgreSQL'a LISTEN/NOTIFY mechanism which can be used asynchronously in psycopg3 - at the cost of a separate connection per user of the chat.

The article also covers how to use the Last-Event-ID header to implement reconnections in server-sent events, transmitting any events that …

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