PeerJS - connection event's parameter is not id - node.js

Question

In PeerJS Server, connection event's parameter is not an id. I guess it is a socket.
Following is my code.
var express = require('express');
var app = express();
var ExpressPeerServer = require('peer').ExpressPeerServer;
app.get('/', function(req, res, next) { res.send('Hello world!'); });
var server = app.listen(9000);
var options = {
debug: true
};
app.use('/api', ExpressPeerServer(server, options));
server.on('connection', function(id) { console.log(id); });
When I run it and enter http://localhost:9000/, the console prints huge text, doesn't seem like id.
Socket {
_connecting: false,
_hadError: false,
_handle:
TCP {
_externalStream: {},
fd: -1,
reading: true,
owner: [Circular],
onread: [Function: onread],
onconnection: null,
writeQueueSize: 0 },
_parent: null,
_host: null,
_readableState:
ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: [],
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: true,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null },
readable: true,
domain: null,
_events:
{ end: [ [Object], [Function: socketOnEnd] ],
finish: [Function: onSocketFinish],
_socketEnd: [Function: onSocketEnd],
drain: [ [Function: ondrain], [Function: socketOnDrain] ],
timeout: [Function],
error: [Function: socketOnError],
close: [Function: serverSocketCloseListener],
data: [Function: socketOnData],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause] },
_eventsCount: 10,
_maxListeners: undefined,
_writableState:
WritableState {
objectMode: false,
highWaterMark: 16384,
needDrain: false,
ending: false,
ended: false,
finished: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: true,
bufferProcessing: false,
onwrite: [Function],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 0,
prefinished: false,
errorEmitted: false,
bufferedRequestCount: 0,
corkedRequestsFree: CorkedRequest { next: [Object], entry: null, finish: [Function] } },
writable: true,
allowHalfOpen: true,
destroyed: false,
bytesRead: 0,
_bytesDispatched: 0,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server:
Server {
domain: null,
_events:
{ request: [Object],
connection: [Object],
clientError: [Function],
error: [Function],
upgrade: [Function] },
_eventsCount: 5,
_maxListeners: undefined,
_connections: 1,
_handle:
TCP {
_externalStream: {},
fd: -1,
reading: false,
owner: [Circular],
onread: null,
onconnection: [Function: onconnection],
writeQueueSize: 0 },
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::9000',
_webSocketPaths: { '/api/peerjs': 1 } },
_server:
Server {
domain: null,
_events:
{ request: [Object],
connection: [Object],
clientError: [Function],
error: [Function],
upgrade: [Function] },
_eventsCount: 5,
_maxListeners: undefined,
_connections: 1,
_handle:
TCP {
_externalStream: {},
fd: -1,
reading: false,
owner: [Circular],
onread: null,
onconnection: [Function: onconnection],
writeQueueSize: 0 },
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::9000',
_webSocketPaths: { '/api/peerjs': 1 } },
_idleTimeout: 120000,
_idleNext: { _idleNext: [Circular], _idlePrev: [Circular] },
_idlePrev: { _idleNext: [Circular], _idlePrev: [Circular] },
_idleStart: 2700,
parser:
HTTPParser {
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: onParserExecute],
_headers: [],
_url: '',
_consumed: true,
socket: [Circular],
incoming: null,
outgoing: null,
maxHeaderPairs: 2000,
onIncoming: [Function: parserOnIncoming] },
on: [Function: socketOnWrap],
_paused: false }
How can I get vanilla ID?

Answer 1

You tried to use connection event of http module, not ExpressPeerServer.
Following is modified code.
var express = require('express');
var app = express();
var ExpressPeerServer = require('peer').ExpressPeerServer;
app.get('/', function(req, res, next) { res.send('Hello world!'); });
var server = app.listen(9000);
var options = {
debug: true
};
var peerServer = ExpressPeerServer(server, options);
app.use('/api', peerServer);
peerServer.on('connection', function(id) { console.log(id); });
It will print vanilla ID when you enter http://localhost:9000/.