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recorder.js
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recorder.js
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var misc = require('./misc.js'); //miscellaneous things
var servers = require('./servers.js');
var WebSocket = require('ws');
var fs = require('fs');
var WebSocketServer = WebSocket.Server;
var wss;
misc.help(['streamer-port', 'path', 'agario-server', 'server-key', 'server-region', 'server-type']); //display help if requested
var port = misc.readParam('streamer-port'); //local port for connections
var records_path = misc.readParam('path'); //where to store record files
var agar_server = misc.readParam('agario-server'); //agar.io server
var server_key = misc.readParam('server-key'); //server key
var server_region = misc.readParam('server-region'); //server region
var server_type = misc.readParam('server-type'); //server type
wss = new WebSocketServer({port: port});
wss.on('connection', function(wsc) {
new Streamer(wsc);
});
console.log('agar.io recorder started');
if(agar_server != 'random' && !server_key)
console.log('[Warning] You did not set server key, server may ignore/disconnect you');
console.log('');
console.log('Open in browser http://agar.io/ and execute in console:');
console.log(' connect("ws://127.0.0.1:' + port + '/","");');
console.log('');
console.log('Waiting for connections...');
function Streamer(wsc) {
var streamer = this;
this.ws = null;
this.wsc = wsc;
this.name = wsc.upgradeReq.connection.remoteAddress + ':' + wsc.upgradeReq.connection.remotePort;
this.filename = (+new Date()) + '_' + (Math.floor(Math.random()*1E8)) + '.tmp.rec';
this.rename = '';
this.last_msg = 0;
this.send_queue = [];
this.file_stream = null;
this.file_stream_closed = false;
this.agony = false;
this.attachEvents();
this.log('Streamer connected to recorder');
this.openFileStream(function() {
streamer.prepareServer();
});
}
Streamer.prototype = {
log: function(msg) {
var now = new Date();
var time = ('0' + now.getHours()).substr(-2) + ":"
+ ('0' + now.getMinutes()).substr(-2) + ":"
+ ('0' + now.getSeconds()).substr(-2);
console.log(time + ' ' + this.name + ') ' + msg);
},
attachEvents: function() {
var streamer = this;
this.wsc.on('message', function(buff) {
if(streamer.agony) return;
if(buff[0] == 0) streamer.tryNewFilename(buff);
//ignore initial packets, we will emulate them
if(buff[0] == 255) return;
if(buff[0] == 254) return;
if(buff[0] == 80) return;
if(streamer.ws && streamer.ws.readyState === WebSocket.OPEN) {
streamer.ws.send(buff);
}else{
streamer.send_queue.push(buff);
}
});
this.wsc.on('close', function() {
streamer.log('Streamer disconnected from recorder');
streamer.suicide('Streamer disconnected from recorder');
});
this.wsc.on('error', function(e) {
streamer.log('Streamer connection error: ' + e);
streamer.suicide('Streamer connection error: ' + e);
});
},
tryNewFilename: function(buff) {
var name = '';
for(var i=1;i<buff.length;i+=2) {
name += String.fromCharCode(buff.readUInt16LE(i));
}
name = name.replace(/[^a-zA-Z0-9]/g, "").substr(0,12);
this.setNewFilename(name);
},
setNewFilename: function(name) {
var now = new Date;
var filename = ('0' + (now.getDate().toString())).substr(-2) + "." +
('0' + ((now.getMonth()+1).toString())).substr(-2) + "." +
(now.getFullYear()) + "_" +
('0' + (now.getHours().toString())).substr(-2) + "." +
+ ('0' + (now.getMinutes().toString())).substr(-2) + "."
+ ('0' + (now.getSeconds().toString())).substr(-2) + "."
+ ('00' + (now.getMilliseconds().toString())).substr(-3);
if(name) filename += '_' + name;
filename += '.rec';
this.rename = filename;
},
prepareServer: function() {
var streamer = this;
if(agar_server == 'random') {
var opt = {
region: server_region
};
var getAgarioServer;
if(server_type == 'teams') {
getAgarioServer = servers.getTeamsServer.bind(servers);
}else if(server_type == 'experimental') {
getAgarioServer = servers.getExperimentalServer.bind(servers);
}else if(server_type == 'party') {
if(server_key) {
opt.party_key = server_key;
getAgarioServer = servers.getPartyServer.bind(servers);
}else{
getAgarioServer = servers.createParty.bind(servers);
}
}else{ //FFA
getAgarioServer = servers.getFFAServer.bind(servers);
}
streamer.log('Requesting ' + server_type + ' server');
getAgarioServer(opt, function(srv) {
if(srv.server) {
streamer.log('Got server ' + srv.server + ' with key ' + srv.key);
return streamer.connectToAgar('ws://' + srv.server, srv.key);
}
streamer.log('Failed to request server (error=' + srv.error + ', error_source=' + srv.error_source + ')');
//streamer.destroy();
});
}else{
this.connectToAgar(agar_server, server_key);
}
},
connectToAgar: function(server, key) {
var streamer = this;
this.log('Connecting to agar');
var headers = {
'Origin': 'http://agar.io'
};
this.ws = new WebSocket(server, null, {headers: headers});
this.ws.onopen = function() {
if(streamer.agony) streamer.ws.close();
streamer.log('Recorder connected to agar');
//initialization emulation start
var buf = new Buffer(5);
buf.writeUInt8(254, 0);
buf.writeUInt32LE(5, 1);
streamer.ws.send(buf);
buf = new Buffer(5);
buf.writeUInt8(255, 0);
buf.writeUInt32LE(servers.init_key, 1);
streamer.ws.send(buf);
if(key) {
buf = new Buffer(1 + key.length);
buf.writeUInt8(80, 0);
for (var i=1;i<=key.length;++i) {
buf.writeUInt8(key.charCodeAt(i-1), i);
}
this.send(buf);
}
//initialization emulation end
for(var j=0;j<streamer.send_queue.length;j++) {
var packet = streamer.send_queue[j];
//if this is spawn packet, then wait 2000ms or server will ignore us
if(packet[0] == 0) {
(function(packet){
setTimeout(function(){
streamer.ws.send(packet);
},2000);
})(packet);
}else{
streamer.ws.send(packet);
}
}
streamer.send_queue = [];
};
this.ws.onmessage = function(msg){
streamer.rec(msg.data);
if(streamer.wsc && streamer.wsc.readyState === WebSocket.OPEN) {
streamer.wsc.send(msg.data);
}
};
this.ws.onclose = function() {
streamer.suicide('agar closed connection');
streamer.closeFileStream();
};
this.ws.onerror = function(e) {
streamer.suicide('agar connection error: ' + e);
streamer.closeFileStream();
};
},
openFileStream: function(cb) {
var streamer = this;
this.file_stream = fs.createWriteStream(records_path + this.filename);
this.file_stream.on('open', function() {
cb();
});
this.file_stream.on('error', function(err) {
streamer.suicide('file stream error: ' + err);
});
},
closeFileStream: function() {
var streamer = this;
this.file_stream_closed = true;
this.file_stream.on('finish', function() {
if(!streamer.rename) streamer.setNewFilename();
fs.renameSync(records_path + streamer.filename, records_path + streamer.rename);
streamer.log('Record saved as ' + streamer.rename);
});
this.file_stream.end();
},
rec: function(buff) {
if(this.file_stream_closed) return;
if(!this.last_msg) this.last_msg = (+new Date);
var current = (+new Date);
var len = buff.length;
var delta = current-this.last_msg;
this.last_msg = current;
var header = new Buffer(6);
header.writeUInt16LE(delta,0);
header.writeUInt32LE(len,2);
this.file_stream.write(header);
this.file_stream.write(buff);
},
suicide: function(reason) {
if(this.agony) return;
this.log('Finishing: ' + reason);
this.agony = true;
if(this.ws) this.ws.close();
}
};