A real-time chat app in 23 lines of Python and 35 lines of JavaScript | Hacker News Reader

A real-time chat app in 23 lines of Python and 35 lines of JavaScript

github.com

42 pointskdunglas8 comments

I'd take 46 lines of python and 70 lines of javascript if we could have a moderation panel that gives admins access to vistor ips and ability to block names, ip subnets and cidrs.

Would be nice to finally get a replacement for the old RealChat application - everyone seems to be building light ux apps without security. Fine for chatting with friends or coworkers, not so great for open web deployment.

Should have a "Show HN:" tag.

It's a pull request that hasn't been merged yet? Why share this?

Not OP, but I suspect it's to either drum up interest for it and/or get more eyes on the code in the hopes that others will review it.

What's the difference mercure and the competition such as wamp.ws ?

They address this in the README of the repo (https://github.com/dunglas/mercure) under the "What's the Difference Between Mercure and WebSocket?" section:

> WebSocket is a low level protocol, Mercure is a high level one. Mercure provides convenient built-in features such as authorization, re-connection and state reconciliation ; while with WebSocket, you need to implement them yourself. Also, unlike Mercure (which is built on top of HTTP and Server-Sent Events), WebSocket is not designed to leverage HTTP/2.

> HTTP/2 connections are multiplexed and bidirectional by default (it was not the case of HTTP/1). When using Mercure over a h2 connection (recommended), your app can receive data through Server-Sent Events, and send data to the server with regular POST (or PUT/PATCH/DELETE) requests, with no overhead.

Wamp.ws is not raw websocket, it's a high level open protocol standardized and registered at IANA. It features rpc, pub sub, namespaces, realms and has FOSS client implementations in python, c++, java, js, php, c#...

So my question stands.

I was about to comment about how it might be better to use WebSockets since SSE has a bad compatibility history, then I realized what mercure is.

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