Socket Gateway Dependency Injection Not Working

[utkugetir]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

The dependencies do not get injected for the following code:

@UseFilters(new WsCatchAllFilter())
@WebSocketGateway({
  transports: ['websocket']
})
export class SocketGateway implements OnGatewayConnection, OnGatewayDisconnect {
  @WebSocketServer()
  server: Server;

  constructor(
    private readonly socketService: SocketService,
    private readonly logger: PinoLogger
  ) {
    logger.setContext(SocketGateway.name);
  }

  async handleConnection(client: Socket) {
    // Handle connection event
    try {
      this.logger.debug('New client connected. Verifying token...', { id: client.id });

      const isVerified = await this.socketService.verifyUser(client);
      if (!isVerified) {
        this.logger.debug('Client disconnected. Not authorized.', { id: client.id });
        client.disconnect();
      }

      this.logger.debug('Client connection success. Token verified.', { id: client.id });
      client.emit('connection', 'Successfully connected to server.');
    } catch (error) {
      client.disconnect();
      throw error;
    }
  }

  handleDisconnect(client: Socket) {
    // Handle disconnection event
    this.logger.debug('Client disconnected', { id: client.id });
  }
}

What I noticed is that constructor does not get called at all and produces the following error:

this.logger.debug('New client connected. Verifying token...', { id: client.id }); ^ TypeError: Cannot read properties of undefined (reading 'debug') at SocketGateway.handleConnection (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/src/socket/gateways/socket.gateway.ts:26:19) at Object.next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/@nestjs/websockets/web-sockets-controller.js:77:47) at ConsumerObserver.next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/Subscriber.ts:161:25) at SafeSubscriber._next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/Subscriber.ts:119:22) at SafeSubscriber.next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/Subscriber.ts:75:12) at /Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/operators/distinctUntilChanged.ts:173:22 at OperatorSubscriber._next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/operators/OperatorSubscriber.ts:70:13) at OperatorSubscriber.next (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/Subscriber.ts:75:12) at /Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/Subject.ts:68:20 at Object.errorContext (/Users/utkuturkoglu/projects/turkoglu/phoenix-new/phoenix-api-gateway/node_modules/rxjs/src/internal/util/errorContext.ts:29:5)

Minimum reproduction code

https://stackblitz.com/edit/nestjs-typescript-starter-hwu1qr?file=src%2Fsocket%2Fgateways%2Fsocket.gateway.ts

Steps to reproduce

Node Version: 20.10.0
"@nestjs/common": "10.4.1",
"@nestjs/core": "10.4.1",
"@nestjs/platform-socket.io": "^10.4.1",
"@nestjs/websockets": "^10.4.1",
"socket.io": "^4.7.5",

Expected behavior

Dependencies should be injected

Package

• I don't know. Or some 3rd-party package
• @nestjs/common
• @nestjs/core
• @nestjs/microservices
• @nestjs/platform-express
• @nestjs/platform-fastify
• @nestjs/platform-socket.io
• @nestjs/platform-ws
• @nestjs/testing
• @nestjs/websockets
• Other (see below)

Other package

No response

NestJS version

10.4.1

Packages versions

"@nestjs/common": "10.4.1",
"@nestjs/core": "10.4.1",
"@nestjs/platform-socket.io": "^10.4.1",
"@nestjs/websockets": "^10.4.1",
"socket.io": "^4.7.5",

Node.js version

20.10.0

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

No response

[jmcdo29]

I had to modify your reproduction significantly to even get it to install, compile, and start, and now I'm not sure how you expect us to test the gateway injection. Please provide a minimal reproduction that works and easily shows the problem.

[utkugetir]

I had to modify your reproduction significantly to even get it to install, compile, and start, and now I'm not sure how you expect us to test the gateway injection. Please provide a minimal reproduction that works and easily shows the problem.

Sorry about that, was in a rush. Updated the reproduction to be working

[hassanmehdi98]

this is just an idea on top of my head, will take out some time to actually test this

you need to use the Logger from @nestjs/common - since you have already configured the nestjs-pino in your app module as root logger, you should directly use the logger from nestjs.

import { Logger } from "@nestjs/common";

@UseFilters(new WsCatchAllFilter())
@WebSocketGateway({
  transports: ['websocket'],
})
export class SocketGateway implements OnGatewayConnection, OnGatewayDisconnect {
  @WebSocketServer()
  server: Server;
  private logger: Logger = new Logger(SocketGateway.name);

  // your methods here
}

give it a try and let me know

[utkugetir]

this is just an idea on top of my head, will take out some time to actually test this

you need to use the Logger from @nestjs/common - since you have already configured the nestjs-pino in your app module as root logger, you should directly use the logger from nestjs.

import { Logger } from "@nestjs/common";

@UseFilters(new WsCatchAllFilter())
@WebSocketGateway({
  transports: ['websocket'],
})
export class SocketGateway implements OnGatewayConnection, OnGatewayDisconnect {
  @WebSocketServer()
  server: Server;
  private logger: Logger = new Logger(SocketGateway.name);

  // your methods here
}

give it a try and let me know

Hi @hassanmehdi98

The issue is not logger, I have tried removing it and keeping only some other service injected, the issue persists. The problem is that it cannot inject any dependency