ThrottlerGuard not working on Websocket in Nestjs - websocket

Question

I'm creating an application that is using Nestjs with websockets, but now I need to add rate limit on the sockets, but analyzing the documentation documentation link and implementing what it says in it, when I use #UseGuards(MyGuard) an error occurs in the application.
My Guard:
#Injectable()
export class NewThrottlerGuard extends ThrottlerGuard {
protected async handleRequest(
context: ExecutionContext,
limit: number,
ttl: number,
): Promise<boolean> {
console.log('Request');
const client = context.switchToWs().getClient();
const ip = client.conn.remoteAddress;
const key = this.generateKey(context, ip);
const ttls = await this.storageService.getRecord(key);
if (ttls.length >= limit) {
throw new ThrottlerException();
}
await this.storageService.addRecord(key, ttl);
return true;
}
}
Websocket:
#UseGuards(NewThrottlerGuard)
#SubscribeMessage('sendMessage')
sendMessage(
#ConnectedSocket() client: Socket,
#MessageBody() message: string,
) {
client.rooms.forEach((room) => {
if (room !== client.id) {
client.broadcast.to(room).emit('message', message);
}
});
}
Error in console:
/node_modules/#nestjs/common/utils/validate-each.util.js:22
throw new InvalidDecoratorItemException(decorator, item, context.name);
^
Error: Invalid guard passed to #UseGuards() decorator (ChatGateway).
at validateEach
The file in: #nestjs/common/utils/validate-each.util.js:22
function validateEach(context, arr, predicate, decorator, item) {
if (!context || !context.name) {
return true;
}
console.log(context, arr)
const errors = arr.some(str => !predicate(str));
if (errors) {
throw new InvalidDecoratorItemException(decorator, item, context.name);
}
return true;
}
i put some console.log then in the terminal it show:
[Function: ChatGateway] [ undefined ]
In Github Throttler documentation they say: You cannot bind the guard with APP_GUARD or app.useGlobalGuards() due to how Nest binds global guards.
So, im using #UseGuards()

Answer 1

The guard itself was written correctly, but it was put in a location that importing it made a circular reference between files, so when #UseGuards() was used it became #UseGuards(undefined) which caused the cryptic error message. Moving the guard to a dedicated file will fix the error

Answer 2

I follow your github reference settings and it doesn't work，The following is my code, where is my setting wrong, and the request to ws is not intercepted(In the handleRequest method)