occur error when run some WebSocket Servers.

[youkinjoh]

//package.json
{
  "name": "ws-pullreq",
  "version": "0.0.1",
  "private": true,
  "dependencies": {
    "ws": "3.0.0",
    "express": ">=3.2.0 <4.0.0"
  }
}

//app.js
var express = require('express')
  , http = require('http')
  , WebSocket = require('ws')
  , WebSocketServer = WebSocket.Server;

var app = express();

app.set('port', 3000);

var server = http.createServer(app);

var servers = [];
var clients = [];

console.log(process.env.SWITCH);

switch(process.env.SWITCH) {
  case 'foo':
    servers.push(new WebSocketServer({'server': server, 'path': '/foo'}));
    break;
  case 'bar':
    servers.push(new WebSocketServer({'server': server, 'path': '/bar'}));
    break;
  case 'foobar':
    servers.push(new WebSocketServer({'server': server, 'path': '/foo'}));
    servers.push(new WebSocketServer({'server': server, 'path': '/bar'}));
    break;
}

setTimeout(function() {
  switch(process.env.SWITCH) {
    case 'foo':
      clients.push(new WebSocket('ws://localhost:3000/foo'));
      break;
    case 'bar':
      clients.push(new WebSocket('ws://localhost:3000/bar'));
      break;
    case 'foobar':
      clients.push(new WebSocket('ws://localhost:3000/foo'));
      clients.push(new WebSocket('ws://localhost:3000/bar'));
      break;
  }
  clients.map(function(client, indx, ary) {
    client.on('open', function(e) {
      console.log('--open--');
      console.log(client.url);
    });
    client.on('error', function(err) {
      console.log('--error--');
      console.log(client.url);
      console.log(err.message);
    });
  });
}, 1000);

server.listen(app.get('port'), function() {
  console.log('Express server listening on port ' + app.get('port'));
});

when % SWITCH="foo" node app.js

foo
Express server listening on port 3000
--open--
ws://localhost:3000/foo

when % SWITCH="bar" node app.js

bar
Express server listening on port 3000
--open--
ws://localhost:3000/bar

when % SWITCH="foobar" node app.js

foobar
Express server listening on port 3000
--open--
ws://localhost:3000/foo
--error--
ws://localhost:3000/foo
RSV1 must be clear
--error--
ws://localhost:3000/bar
unexpected server response (400)

[youkinjoh]

when ws@2.3.1

% SWITCH="foobar" node app.js
foobar
Express server listening on port 3000
--open--
ws://localhost:3000/foo
--error--
ws://localhost:3000/foo
FIN must be set
--error--
ws://localhost:3000/bar
unexpected server response (400)

when ws@1.1.4

% SWITCH="foobar" node app.js
foobar
Express server listening on port 3000
--open--
ws://localhost:3000/foo
--open--
ws://localhost:3000/bar

[lpinca]

See #885.