Skip to content

Instantly share code, notes, and snippets.

@Pupix
Last active July 25, 2022 07:25
Show Gist options
  • Save Pupix/eb662b1b784bb704a1390643738a8c15 to your computer and use it in GitHub Desktop.
Save Pupix/eb662b1b784bb704a1390643738a8c15 to your computer and use it in GitHub Desktop.
A minimal WAMP 1.0 protocol implementation to be used with the new League of Legends client (LCU)
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
const WebSocket = require('ws');
const MESSAGE_TYPES = {
WELCOME: 0,
PREFIX: 1,
CALL: 2,
CALLRESULT: 3,
CALLERROR: 4,
SUBSCRIBE: 5,
UNSUBSCRIBE: 6,
PUBLISH: 7,
EVENT: 8
};
class RiotWSProtocol extends WebSocket {
constructor(url) {
super(url, 'wamp');
this.session = null;
this.on('message', this._onMessage.bind(this));
}
close() {
super.close();
this.session = null;
}
terminate() {
super.terminate();
this.session = null;
}
subscribe(topic, callback) {
super.addListener(topic, callback);
this.send(MESSAGE_TYPES.SUBSCRIBE, topic);
}
unsubscribe(topic, callback) {
super.removeListener(topic, callback);
this.send(MESSAGE_TYPES.UNSUBSCRIBE, topic);
}
send(type, message) {
super.send(JSON.stringify([type, message]));
}
_onMessage(message) {
const [type, ...data] = JSON.parse(message);
switch (type) {
case MESSAGE_TYPES.WELCOME:
this.session = data[0];
// this.protocolVersion = data[1];
// this.details = data[2];
break;
case MESSAGE_TYPES.CALLRESULT:
console.log('Unknown call, if you see this file an issue at https://discord.gg/hPtrMcx with the following data:', data);
break;
case MESSAGE_TYPES.TYPE_ID_CALLERROR:
console.log('Unknown call error, if you see this file an issue at https://discord.gg/hPtrMcx with the following data:', data);
break;
case MESSAGE_TYPES.EVENT:
const [topic, payload] = data;
this.emit(topic, payload);
break;
default:
console.log('Unknown type, if you see this file an issue with at https://discord.gg/hPtrMcx with the following data:', [type, data]);
break;
}
}
}
/** HOW TO USE */
const ws = new RiotWSProtocol('wss://riot:Vb4qOZdKanoA-9UB9gAN_Q@localhost:60588/');
ws.on('open', () => {
ws.subscribe('OnJsonApiEvent', console.log);
});
{
"name": "lcu-ws-protocol",
"version": "0.0.1",
"main": "index.js",
"author": "Robert Manolea <manolea.robert@gmail.com>",
"license": "MIT",
"dependencies": {
"ws": "^4.0.0"
}
}
@iczero
Copy link

iczero commented Jun 20, 2021

@BalintGergely, if you still care, WAMP function calls are in the form of METHOD /path/name, matching those used for http. I wrote a thing a long time ago using it, see https://github.com/iczero/lol-client-api#api-documentation for examples.

@mikaeldui
Copy link

mikaeldui commented Mar 27, 2022

I tried to send: [2, "GetLolSummonerV1CurrentSummoner"]

I got back: [4,"GetLolSummonerV1CurrentSummoner","InvalidRequest","Invalid WAMP call procedure URI.",0]

According to the WAMP documentation, I need some sort of resource identifier but I can not find what the LCU accepts. I have successfully retrieved the list of functions and subscribable events. How do I invoke functions through WAMP? What sort of prefix do they need?

You were missing the request ID. Either add an empty string, or add one randomly generated by you. E.g. [2, "123", "GetLolSummonerV1CurrentSummoner"].

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment