What are the steps to incorporate metrics middleware for Socket IO notifications, specifically monitoring both emitted events and listener activity?

Question

What are the steps to incorporate metrics middleware for Socket IO notifications, specifically monitoring both emitted events and listener activity?

I am currently working on a project that involves tracking all socket.io notification transactions initiated by the server, resembling an API request/response counter to validate subscription validation.

Our team is utilizing an express middleware to monitor all REST API requests made by users and enforce subscription rules accordingly. We are now attempting to implement a similar middleware for socket io notifications as well.

Our Technology Stack includes NodeJS, Loopback, Express, and Socket IO.

If anyone has any suggestions, please feel free to share them!

javascript node.js sockets express loopback

Answer 1

Answer №1

If you're looking to implement middleware in your Socket.io application, you can utilize the socket.use() method.

The documentation explains:

This method allows you to register a middleware function that will be executed for every incoming Packet. The function receives the packet itself as well as a function to optionally defer execution to the next registered middleware.

Any errors encountered within the middleware functions are sent as special error packets back to clients.
io.on('connection', (socket) => {
  socket.use((packet, next) => {
    if (packet.doge === true) return next();
    next(new Error('Not a doge error'));
  });
});

Answer 2

If you're looking to implement middleware in your Socket.io application, you can utilize the socket.use() method.

The documentation explains:

This method allows you to register a middleware function that will be executed for every incoming Packet. The function receives the packet itself as well as a function to optionally defer execution to the next registered middleware.

Any errors encountered within the middleware functions are sent as special error packets back to clients.
io.on('connection', (socket) => {
  socket.use((packet, next) => {
    if (packet.doge === true) return next();
    next(new Error('Not a doge error'));
  });
});

What are the steps to incorporate metrics middleware for Socket IO notifications, specifically monitoring both emitted events and listener activity?

Answer №1

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