Merge branch 'master' of github.com:krebscode/painload

9 files changed, 432 insertions, 132 deletions

diff --git a/webchat/index.js b/webchat/index.js
index 8ef737fc..9569fc80 100644
--- a/webchat/index.js
+++ b/webchat/index.js
@@ -1,20 +1,30 @@
+'use strict';
 var fs = require('fs');
 var http = require('https');
 var sockjs = require('sockjs');
 var connect = require('connect');
 var irc = require('irc');
-var Clients = [];
+var make_sockjs_server_connection_transport = require('./sockjs_server_connection_transport.js')
+var RPC = require('./public/rpc.js');
+var irc_nicks = []
 
-Clients.broadcast = function(object) { //broadcast to all clients
-  Clients.forEach(function(client) {
-    client.write(JSON.stringify(object));
-  });
+function pluck (key) {
+  return function (object) {
+    return object[key]
+  }
+}
+
+var clients = [];
+clients.broadcast = function (method, params) {
+  clients.map(pluck('rpc')).forEach(function (rpc) {
+    rpc.send(method, params)
+  })
 }
 
 var irc_reconnect = function() { //reconnt to irc
-  console.log("reconnecting due to pingtimeout");
-  irc_client.disconnect();
-  irc_client.connect();
+  console.log("would reconnect now")
+//  irc_client.disconnect()
+//  irc_client.connect()
 }
 
 var pingTimeoutDelay = 3*60*1000
@@ -27,7 +37,7 @@ var irc_client = new irc.Client('irc.freenode.net', 'kweb', { //create irc_clien
   userName: 'kweb', //todo: read from local_config
   realName: 'kweb', //todo: read from local_config
   password: fs.readFileSync(__dirname+'/local_config/irc.key').toString(),
-  debug: false,
+  debug: true,
   showErrors: true,
   floodProtection: true,
   port: 6697,
@@ -36,7 +46,6 @@ var irc_client = new irc.Client('irc.freenode.net', 'kweb', { //create irc_clien
   stripColors: true
 });
 
-
 irc_client.on('ping', function(server) { //restart timer on server ping
   console.log("got ping from server, renewing timeout for automatic reconnect");
   clearTimeout(lastping);
@@ -45,60 +54,97 @@ irc_client.on('ping', function(server) { //restart timer on server ping
 
 irc_client.on('message#krebs', function(from, message) {
   console.log({ from: from, message: message });
-  Clients.broadcast({ from: from, message: message }); //broadcast irc messages to all connected clients
+  clients.broadcast('msg', {nick: from, msg: message})
   clearTimeout(lastping);
 });
 
-var web_serv_options = { //certificates for https
-  key: fs.readFileSync(__dirname+'/local_config/server_npw.key'),
-  cert: fs.readFileSync(__dirname+'/local_config/server.crt'),
-};
+irc_client.on('names#krebs', function(nicks) {
+  Object.keys(nicks).forEach(function (nick) {
+  irc_nicks.push(nick)
+    clients.broadcast('join', {type: 'irc', nick: nick})
+  })
+})
 
-var echo = sockjs.createServer();
-echo.on('connection', function(conn) {
-  var origin = conn.remoteAddress;
-  Clients.push(conn);
-  Clients.broadcast({from: 'system', message: origin + ' has joined'})
-//  irc_client.say("#krebs", origin + ' has joined');
-  conn.write(JSON.stringify({from: 'system', message: 'hello'})) //welcome message
-  conn.on('data', function(data) {
-    console.log('data:',data);
-    try {
-      var object = JSON.parse(data);
-      if (object.message.length > 0) { //if message is not empty
-        if (/^\/nick\s+(.+)$/.test(object.message)) { //if nick is send use nick instead of ip
-          object.from = origin;
-        } else if (typeof object.nick === 'string') {
-          object.from = object.nick;
-        } else {
-          object.from = origin;
-        };
-        console.log(object.message);
-        irc_client.say("#krebs", object.from + ' → ' + object.message);
-        Clients.broadcast(object);
-      }
-
-    } catch (error) {
-      console.log(error);
-    }
-  });
-  conn.on('close', function() { //propagate if client quits the page
-  Clients.splice(Clients.indexOf(conn));
-  Clients.broadcast({from: 'system', message: origin + ' has quit'})
-//  irc_client.say("#krebs", origin + ' has quit');
-});
+irc_client.on('join#krebs', function(nick, msg) {
+  if (nick !== 'kweb'){
+    irc_nicks.push(nick)
+    clients.broadcast('join', {type: 'irc', nick: nick})
+  }
+})
+
+irc_client.on('part#krebs', function(nick, rs, msg) {
+  clients.broadcast('part', {type: 'irc', nick: nick})
 });
 
+irc_client.on('error', function (error) {
+  irc_nicks.forEach( function(nick) {
+    client.rpc.send('part', {type: 'irc', nick: nick})
+    irc_nicks.splice(irc_nicks.indexOf(nick))
+  })
+  console.log('irc-client error', error)
+})
+
+var echo = sockjs.createServer();
+
+var total_clients_ever_connected = 0
+
+echo.on('connection', function (connection) {
+  var client = {}
+  client.rpc = new RPC(make_sockjs_server_connection_transport(connection))
+  client.nick = 'anon'+(++total_clients_ever_connected)
+  client.rpc.send('your_nick', {nick: client.nick}) 
+  client.rpc.register('msg', {msg: 'string'}, function (params, callback) {
+    callback(null)
+    clients.broadcast('msg', {type: 'web', nick: client.nick, msg: params.msg})
+    irc_client.say('#krebs', client.nick + ' → ' + params.msg)
+  })
+  client.rpc.register('nick', {nick: 'string'}, function (params, callback) {
+    if (!!~clients.map(pluck('nick')).indexOf(params.nick)) {
+      callback('name already taken')
+    } else if (/^anon[0-9]+$/.test(params.nick)) {
+      callback('bad nick')
+    } else {
+      var oldnick = client.nick
+      client.nick = params.nick
+      callback(null)
+      clients.broadcast('nick', {type: 'web', newnick: client.nick, oldnick: oldnick})
+      irc_client.say('#krebs', oldnick + ' is now known as ' + client.nick)
+    }
+  })
+  connection.on('close', function() { //propagate if client quits the page
+    clients.splice(clients.indexOf(client));
+    clients.broadcast('part', {type: 'web', nick: client.nick})
+    irc_client.say('#krebs', client.nick + ' has parted')
+  })
+  //send the irc nicklist to the new joined client
+  irc_nicks.forEach( function(nick) {
+    client.rpc.send('join', {type: 'irc', nick: nick})
+  })
+  //send nicklist to newly joined client
+  clients.map(pluck('nick')).forEach(function (nick) {
+    client.rpc.send('join', {type: 'web', nick: nick}) 
+  })
+  //add new client to list
+  clients.push(client)
+  //send all including the new client the join
+  clients.broadcast('join', {type: 'web', nick: client.nick})
+  //send join to irc
+  irc_client.say('#krebs', client.nick + ' has joined')
+})
 
 var app = connect()
   .use(connect.logger('dev'))
   .use(connect.static(__dirname+'/public'))
   .use( function (req, res) {
     res.writeHead(200, {'Content-Type': 'text/html'});
-    page_template='<!doctype html>\n';
+    var page_template='<!doctype html>\n';
     page_template+='<link rel="stylesheet" type="text/css" href="reset.css">\n';
     page_template+='<script src="sockjs-0.3.min.js"></script>\n';
     page_template+='<script src="jquery-2.0.3.min.js"></script>\n';
+    page_template+='<script src="commands.js"></script>\n';
+    page_template+='<script src="functions.js"></script>\n';
+    page_template+='<script src="sockjs_client_transport.js"></script>\n';
+    page_template+='<script src="rpc.js"></script>\n';
     page_template+='<script src="client.js"></script>\n';
     page_template+='<div id="bg">';
     page_template+='<div id="chatter">';
@@ -106,7 +152,8 @@ var app = connect()
     page_template+='hello, this is the official krebs support:<br>\n';
     page_template+='<table id="chatbox"><tr id="foot"><td id="time"></td><td id="nick" class="chat_from"></td><td><input type="text" id="input"></td></tr></table>\n';
     page_template+='</div>';
-    page_template+='<div id="sideboard"><div id="links">';
+    page_template+='<div id="sideboard"><div id=nicklist></div>';
+    page_template+='<div id="links">';
     page_template+='<a href="http://gold.krebsco.de/">krebsgold browser plugin</a><br>';
     page_template+='<a href="http://ire:1027/dashboard/">ire: Retiolum Dashboard</a><br>';
     page_template+='<a href="http://pigstarter/">pigstarter: network graphs</a><br>';
@@ -114,6 +161,11 @@ var app = connect()
     res.end(page_template);
 
   })
+
+var web_serv_options = { //certificates for https
+  key: fs.readFileSync(__dirname+'/local_config/server_npw.key'),
+  cert: fs.readFileSync(__dirname+'/local_config/server.crt'),
+};
 var server = http.createServer(web_serv_options, app);
 echo.installHandlers(server, {prefix:'/echo'});
 server.listen(1337, '0.0.0.0');
diff --git a/webchat/proto_spec b/webchat/proto_spec
new file mode 100644
index 00000000..fffce165
--- /dev/null
+++ b/webchat/proto_spec
@@ -0,0 +1,62 @@
+server -> client:
+#old
+type:    'message' | 'join' | 'quit' | 'nicklist' | 'nickchange' | 'usererror'
+nick:    the clients nickname ('message','nickchange')
+newnick: new nick after nickchange ('nickchange')
+from:    the clients ip ('message','quit','join')
+message: the data send ('message', 'nicklist','usererror'
+
+
+#new
+type:    'irc_msg' | 'irc_join' | 'irc_quit' | 'irc_nickchange' | 'irc_client_connect' | 'irc_client_disconnect' | 'web_welcome' |'web_msg' | 'web_join' | 'web_quit' | 'web_nickchange' | 'usererror'
+params:{ nick:, oldnick:, nicklist:, msg:, errormsg: }
+
+'irc_msg': nick, msg
+'irc_join': nick
+'irc_quit': nick
+'irc_nickchange': oldnick, nick
+'kweb_irc_connect': nicklist
+'kweb_irc_disconnect': --
+'web_welcome': msg, nicklist, nick
+'web_msg': nick, msg
+'web_join': nick
+'web_quit': nick
+'web_nickchange': oldnick, nick
+'usererror': msg
+
+
+client -> server
+#old
+method: 'say', 'nick'
+params:{ msg:, nick: }
+
+'say': msg
+'nick': nick
+
+
+##############JSON RPC################
+server->client:
+{method: 'say', params: {msg: msg}, id: id}
+-> {result: {ok: ok}, error {error muted?}, id: id}
+
+{method: 'nick', params: {nick: nick}, id: id}
+-> {result: {nick: nick}, error: {error name taken?/reserved/not allowed}, id: id}
+
+
+client->server:
+broadcast:
+  {method: 'irc_msg', params: {nick: nick, msg: msg}, id: 0} #notification
+  {method: 'irc_join', params: {nick: nick}, id: 0} #notification
+  {method: 'irc_quit', params: {nick: nick}, id: 0} #notification
+  {method: 'irc_nickchange', params: {nick: nick, oldnick: oldnick}, id: 0} #notification
+  {method: 'kweb_irc_connect', params: {nicklist: nicklist}, id: 0} #notification
+  {method: 'kweb_irc_disconnect', params: {}, id: 0} #notification
+  {method: 'web_msg', params: {nick: nick, msg: msg}, id: 0} #notification
+  {method: 'web_join', params: {nick: nick}, id: 0} #notification
+  {method: 'web_quit', params: {nick: nick}, id: 0} #notification
+  {method: 'web_nickchange', params: {nick: nick, oldnick: oldnick}, id: 0} #notification
+
+unicast:
+  {method: 'coi', params: {}, id: id}
+  -> {result: {result: {nick: nick, addr: addr}, error: {connection error?}, id: id}
+  {method: 'usererror', params: {msg: 'error type'}, id: 0} #notification
diff --git a/webchat/public/client.js b/webchat/public/client.js
index ca71b537..54ccfe34 100644
--- a/webchat/public/client.js
+++ b/webchat/public/client.js
@@ -1,34 +1,50 @@
-function replaceURLWithHTMLLinks (text) {
-  var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
-  return text.replace(exp,"<a href='$1'>$1</a>");
-}
-function setMaybeNick (input) {
-  var match = /^\/nick\s+(.+)$/.exec(input);
-  if (match) {
-    nick = match[1];
-    $('#nick').html(nick);
-  }
-}
+var settings = {}
+settings.sock = new SockJS('/echo');
+settings.waiting_callbacks = {}
 
-function getCurTime () {
-  date = new Date;
-  h = date.getHours();
-  if(h<10)
-  {
-    h = "0"+h;
-  }
-  m = date.getMinutes();
-  if(m<10)
-  {
-    m = "0"+m;
-  }
-  s = date.getSeconds();
-  if(s<10)
-  {
-    s = "0"+s;
+var transport = make_sockjs_client_transport(settings.sock)
+settings.rpc = new RPC(transport)
+
+settings.rpc.register('msg', {type: 'string', nick: 'string', msg: 'string'}, function(params, callback) {
+  var safe_message = $('<div/>').text(params.msg).html();
+  safe_message = replaceURLWithHTMLLinks(safe_message);
+  var safe_from = $('<div/>').text(params.nick).html();
+  chatboxAppend(safe_from, safe_message, 'web_msg')
+  return callback(null)
+})
+settings.rpc.register('nick', {type: 'string', newnick: 'string', oldnick: 'string'}, function(params, callback) {
+  var safe_oldnick = $('<div/>').text(params.oldnick).html();
+  var safe_newnick = $('<div/>').text(params.newnick).html();
+  var safe_type = $('<div/>').text(params.type).html();
+  if (safe_oldnick === settings.nick){
+    settings.nick = safe_newnick
+    $('#nick').html(settings.nick)
   }
-  return ''+h+':'+m+':'+s;
-};
+  $(getNicklistElement(safe_oldnick,safe_type)).remove();
+  $('#nicklist').append('<div class="'+safe_type+'_name">' + safe_newnick + '</div>') ;
+  chatboxAppend(safe_oldnick, 'is now known as ' + safe_newnick, 'nick');
+  return callback(null)
+})
+settings.rpc.register('your_nick', {nick: 'string'}, function(params, callback) {
+  var safe_nick = $('<div/>').text(params.nick).html();
+  settings.nick = safe_nick
+  $('#nick').html(settings.nick)
+  return callback(null)
+})
+settings.rpc.register('join', {type: 'string', nick: 'string'}, function(params, callback) {
+  var safe_nick = $('<div/>').text(params.nick).html();
+  var safe_type = $('<div/>').text(params.type).html();
+  $('#nicklist').append('<div class="'+safe_type+'_name">' + safe_nick + '</div>') ;
+  chatboxAppend(safe_nick, 'has joined');
+  return callback(null)
+})
+settings.rpc.register('part', {type: 'string', nick: 'string'}, function(params, callback) {
+  var safe_nick = $('<div/>').text(params.nick).html();
+  var safe_type = $('<div/>').text(params.type).html();
+  $(getNicklistElement(safe_nick,safe_type)).remove();
+  chatboxAppend(safe_nick, 'has parted');
+  return callback(null)
+})
 
 $(function updateTime () {
   $('#time').html(getCurTime());
@@ -36,59 +52,18 @@ $(function updateTime () {
   return true;
 });
 
-var nick;
-
-$(function connect() {
-  sock = new SockJS('/echo');
-
-  sock.onopen = function() {
-    console.log('open');
-    sock.send('open');
-  };
-  sock.onmessage = function(e) {
-    console.log('message', e.data);
-    try {
-      var object = JSON.parse(e.data);
-      console.log(object.message);
-      var safe_message = $('<div/>').text(object.message).html();
-      safe_message = replaceURLWithHTMLLinks(safe_message);
-      var safe_from = $('<div/>').text(object.from).html();
-      $('<tr><td class="chat_date">'+getCurTime()+'</td><td class="chat_from">'+safe_from+'</td><td class="chat_msg">'+safe_message+'</td></tr>').insertBefore('#foot');
 
-      var elem = document.getElementById('chatter');
-      elem.scrollTop = elem.scrollHeight;
-
-    } catch (error) {
-      console.log(error);
-    }
-  };
-  sock.onclose = function(event) {
-    console.log('close');
-    switch (event.code) {
-      case 1006: //abnormal closure
-        return setTimeout(connect, 1000);
-    };
-  };
-
-});
 $(function() {
   $('#input').keydown(function(e) {
     if (e.keyCode === 13) {
       e.preventDefault();
       e.stopPropagation();
       e.stopImmediatePropagation();
-      setMaybeNick($('#input').val());
-      var sendObj = {
-        message: $('#input').val(),
-      };
-
-      if (typeof nick === 'string') {
-        sendObj.nick = nick;
-      };
+      var input = ($('#input').val());
+      $('#input').val('')
 
-      sock.send(JSON.stringify(sendObj));
-      $('#input').val('');
-      return;
+      var command = inputParser(input)
+      return (commands[command.method] || commands.badcommand)(settings, command.params)
     }
   });
 
diff --git a/webchat/public/functions.js b/webchat/public/functions.js
new file mode 100644
index 00000000..781fafce
--- /dev/null
+++ b/webchat/public/functions.js
@@ -0,0 +1,54 @@
+function inputParser (str) {
+  var match = /^\/([a-z]+)(?:\s+(.*\S))?\s*$/.exec(str)
+  if (match) {
+    return { method: match[1], params: match[2] }
+  } else {
+    return { method: 'msg', params: str }
+  }
+}
+
+function replaceURLWithHTMLLinks (text) {
+  var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
+  return text.replace(exp,"<a class=chat_link href='$1'>$1</a>");
+}
+
+function getNicklistElement(name, type) { 
+  var el;
+  $('.'+type+'_name').each(function (i,e) {
+    if (e.innerHTML === name) {
+      if (typeof el !== 'undefined') {
+        throw new Error('duplicate name: ' + name);
+      };
+      el = e;
+    };
+  });
+  return el;
+}
+
+function chatboxAppend (chat_from, chat_msg, type) {
+  type = type||'msg'
+  $('<tr><td class="date '+type+'_date">'+getCurTime()+'</td><td class="from '+type+'_from">'+chat_from+'</td><td class="msg '+type+'_msg">'+chat_msg+'</td></tr>').insertBefore('#foot');
+
+  var elem = document.getElementById('chatter');
+  elem.scrollTop = elem.scrollHeight;
+};
+
+function getCurTime () {
+  date = new Date;
+  h = date.getHours();
+  if(h<10)
+  {
+    h = "0"+h;
+  }
+  m = date.getMinutes();
+  if(m<10)
+  {
+    m = "0"+m;
+  }
+  s = date.getSeconds();
+  if(s<10)
+  {
+    s = "0"+s;
+  }
+  return ''+h+':'+m+':'+s;
+};
diff --git a/webchat/public/krebs.png b/webchat/public/krebs.png
index 263d5b1c..5762e7f4 100644
--- a/webchat/public/krebs.png
+++ b/webchat/public/krebs.png
diff --git a/webchat/public/reset.css b/webchat/public/reset.css
index 65f68058..d369bc86 100644
--- a/webchat/public/reset.css
+++ b/webchat/public/reset.css
@@ -21,7 +21,6 @@ time, mark, audio, video {
   border: 0;
   font-size: 100%;
   font: inherit;
-  font-family: monospace;
   vertical-align: baseline;
 }
 /* HTML5 display-role reset for older browsers */
@@ -33,6 +32,7 @@ body {
   line-height: 1;
   background-color: black;
   color: white;
+  font-family: monospace;
 }
 ol, ul {
   list-style: none;
@@ -54,17 +54,18 @@ q:before, q:after {
 }
 #input{
   width: 100%;
-  background-color: #555555;
+  background-color: #221111;
   border: 1px solid black;
   color: white;
 }
-.chat_from {
+.from {
   color:grey;
   font-weight: bold;
   text-align: right;
   font-size:12px;
+  white-space: nowrap;
 }
-.chat_from:after {
+.from:after {
   content: ":";
   padding-right: 6px;
 }
@@ -87,16 +88,16 @@ q:before, q:after {
 }
 .chat_date,.chat_from,.chat_msg{
 }
-.chat_msg{
+.msg{
   width: 100%;
 }
 a {
   color: red;
 }
-.chat_date {
+.date {
   color: green;
 }
-.chat_date:after {
+.date:after {
   content: "";
   padding-right: 4px;
 }
@@ -116,4 +117,10 @@ a {
   font-size: 14px;
   position: absolute;
   bottom: 5px;
-}
\ No newline at end of file
+}
+.join_msg {
+  color: #00FF00;
+}
+.quit_msg {
+  color: #FF0000;
+}
diff --git a/webchat/public/rpc.js b/webchat/public/rpc.js
new file mode 100644
index 00000000..8e911e1d
--- /dev/null
+++ b/webchat/public/rpc.js
@@ -0,0 +1,99 @@
+try {
+  module.exports = RPC
+}
+catch(e){
+}
+
+function RPC (transport) {
+  this._id = 0
+  this._waiting_callbacks = {}
+  this._methods = {}
+  this._transport = transport
+
+  transport.onmessage = this.onmessage.bind(this)
+}
+
+RPC.prototype.register = function (method, params, callback) {
+  this._methods[method] = callback
+}
+
+RPC.prototype.send = function (method, params, callback) {
+  var message = {
+    method: method,
+    params: params,
+  }
+  if (callback) {
+    var id = ++this._id
+    this._waiting_callbacks[id] = callback
+    message.id = id
+  }
+  return this._transport.send(message)
+}
+
+function _is_request (message) {
+  return typeof message.method === 'string'
+}
+
+function _is_response (message) {
+  return message.hasOwnProperty('result')
+      || message.hasOwnProperty('error')
+}
+
+RPC.prototype.onmessage = function (message) {
+  console.log('RPC message:', message)
+  if (_is_request(message)) {
+    return this._on_request(message)
+  }
+  if (_is_response(message)) {
+    return this._on_response(message)
+  }
+  return this._on_bad_message(message)
+}
+
+RPC.prototype._on_request = function (request) {
+  var method = this._methods[request.method] || function(){
+    console.log('method not found', request.method)
+  }
+  var params = request.params
+  var id = request.id
+
+  var transport = this._transport
+
+  if (typeof id === 'string' || typeof id === 'number' || id === null) {
+    return method(params, function (error, result) {
+      var response = {
+        id: id,
+      }
+      if (error) {
+        response.error = error
+      } else {
+        response.result = result
+      }
+      console.log('request:', request, '->', response)
+      return transport.send(response)
+    })
+  } else {
+    return method(params, function (error, result) {
+      var response = {
+        id: id,
+      }
+      if (error) {
+        response.error = error
+      } else {
+        response.result = result
+      }
+      console.log('notification:', request, '->', response)
+    })
+  }
+}
+
+RPC.prototype._on_response = function (response) {
+  var result = response.result
+  var error = response.error
+  var id = response.id
+
+  var callback = this._waiting_callbacks[id]
+  delete this._waiting_callbacks[id]
+
+  return callback(result, error)
+}
diff --git a/webchat/public/sockjs_client_transport.js b/webchat/public/sockjs_client_transport.js
new file mode 100644
index 00000000..a7b76af3
--- /dev/null
+++ b/webchat/public/sockjs_client_transport.js
@@ -0,0 +1,25 @@
+
+function make_sockjs_client_transport (sock) {
+  var transport = {}
+
+  sock.onmessage = function (data) {
+    console.log('sockjs parse', data)
+    try {
+      var message = JSON.parse(data.data)
+    } catch (error) {
+      return console.log('error', error)
+    }
+    transport.onmessage(message)
+  }
+
+  transport.send = function (message) {
+    try {
+      var data = JSON.stringify(message)
+    } catch (error) {
+      return console.log('sockjs transport send error:', error)
+    }
+    sock.send(data)
+  }
+
+  return transport
+}
diff --git a/webchat/sockjs_server_connection_transport.js b/webchat/sockjs_server_connection_transport.js
new file mode 100644
index 00000000..6f68b955
--- /dev/null
+++ b/webchat/sockjs_server_connection_transport.js
@@ -0,0 +1,26 @@
+
+module.exports = function make_sockjs_server_connection_transport (connection) {
+  var transport = {}
+
+  connection.on('data', function (data) {
+    try {
+      var message = JSON.parse(data)
+    } catch (error) {
+      return console.log('error', error)
+    }
+    transport.onmessage(message)
+  })
+  connection.on('close', function () {
+  })
+
+  transport.send = function (message) {
+    try {
+      var data = JSON.stringify(message)
+    } catch (error) {
+      return console.log('sockjs transport send error:', error)
+    }
+    connection.write(data)
+  }
+
+  return transport
+}