socket.io-redis尾部字节

Question

I am using socket.io-emitter to broadcast an event to a set of channels with a for loop:

In the file, I have:

var io = require('socket.io-emitter')({
  host: 'localhost',
  port: 6379
});

module.exports = {
  exampleFunction: function(req, res, next) {
    var channels = req.param('channels'),
        data = req.param('data');

    for (var i=0; i<channels.length; i++) {
      io.to(channels[i]).emit('example event', data)
    }
  }
}

In app.js , I have socket.io-redis :

io.adapter(socketio_redis({ 
  host: 'localhost', 
  port: 6379,
  pubClient: redis.createClient(6379, '127.0.0.1'),
  subClient: redis.createClient(6379, '127.0.0.1')
}))

When I try to run exampleFunction , I get the following uncaught error in my console:

Error: 348 trailing bytes
    at Object.decode (C:\Users\Website\socket.io-redis\node_modules\msgpack-js\msgpack.js:200:47)
    at Redis.onmessage (C:\Users\Website\socket.io-redis\index.js:93:24)
    at RedisClient.EventEmitter.emit (events.js:106:17)
    at RedisClient.return_reply (C:\Users\Website\node_modules\redis\index.js:672:22)
    at ReplyParser.<anonymous> (C:\Users\Website\node_modules\redis\index.js:309:14)
    at ReplyParser.EventEmitter.emit (events.js:95:17)
    at ReplyParser.send_reply (C:\Users\Website\node_modules\redis\lib\parser\javascript.js:300:10)
    at ReplyParser.execute (C:\Users\Website\node_modules\redis\lib\parser\javascript.js:211:22)
    at RedisClient.on_data (C:\Users\Website\node_modules\redis\index.js:534:27)
    at Socket.<anonymous> (C:\Website\node_modules\redis\index.js:91:14)

I have seen that this is from msgpack. Have any of you encountered this error before? How did you resolve it?

Thank you.

Answer 1

On the main page of nm.socket.io-redis it is written:

Msgpack with giving us an error called "trailing bytes". After reading up we realized that we could just use JSON.stringfy/JSON.parse instead of msgpack.

Which looks like the error you are getting. As it is suggested there, try JSON.strigfy

Answer 2

Okay, We found the solution. Refer to: https://github.com/Automattic/socket.io-redis/issues/17

As you can see, socket.io-emitter requires you set return_buffers to true on your redis client.

Let me know if this works. Otherwise I can dif in the code some more.

Answer 3

This should answer your question. https://github.com/Automattic/socket.io-redis/issues/17

Answer 4

This helped me with Error: -560815898 trailing bytes error:

1. npm install msgpack-js-v5

2. change file node_modules/socket.io-redis/index.js at the very top:

   var msgpack = require('msgpack-js');

   to

   var msgpack = require('msgpack-js-v5');

3. now use code similar to this:

    var adapter = require('socket.io-redis'); var pub = redis.createClient(6379, 'localhost'); var sub = redis.createClient(6379, 'localhost', { return_buffers: true }); io.adapter(adapter({pubClient: pub, subClient: sub})); 

UPDATE:

In some days I stumbled upon an error bops.readUInt64BE is not a function , so eventually I switched msgpack-js-v5 to msgpack5 and now it works ok.