364 lines
14 KiB
JavaScript
364 lines
14 KiB
JavaScript
var net = require('net'),
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fs = require('fs'),
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dgram = require('dgram'),
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eventParser = require('../lib/eventParser.js'),
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pubsub = require('event-pubsub');
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function emit(socket, type, data){
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if(!data)
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data=false;
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this.log('dispatching event to socket'.debug, ' : ', type.data, data);
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var event={
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type:type,
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data:data
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}
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if(this.config.rawBuffer){
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data=new Buffer(type,this.encoding);
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}else{
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data=eventParser.format(
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event
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);
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}
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if(this.udp4 || this.udp6){
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if(!socket.address || !socket.port){
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this.log('Attempting to emit to a single UDP socket without supplying socket address or port. Redispatching event as broadcast to all connected sockets');
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this.broadcast(type,data);
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return;
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}
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this.server.write(
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data,
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socket
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);
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return;
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};
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socket.write(data);
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};
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function broadcast(type,data){
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this.log('broadcasting event to all known sockets listening to '.debug, this.path.variable,' : ', ((this.port)?this.port:''), type, data);
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if(!data)
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data=false;
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var event={
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type:type,
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data:data
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};
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if(this.config.rawBuffer){
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data=new Buffer(type,this.encoding);
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}else{
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data=eventParser.format(
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event
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);
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}
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if(this.udp4 || this.udp6){
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for(var i=1, count=this.sockets.length; i<count; i++){
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this.server.write(data,this.sockets[i]);
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}
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}else{
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for(var i=0, count=this.sockets.length; i<count; i++){
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this.sockets[i].write(data);
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}
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}
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};
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function init(path,config,log,port){
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var server={
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config : config,
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path : path,
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port : port,
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udp4 : false,
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udp6 : false,
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log : log,
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server : false,
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sockets : [],
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emit : emit,
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broadcast : broadcast,
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define : {
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listen : {
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'get.events.broadcasting' : 'does not require any special paramaters',
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'get.events.listening' : 'does not require any special paramaters'
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},
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broadcast : {
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'events.broadcasting' : 'data.events is a JSON object of event definitions by type '+config.id+' will broadcast on '+path,
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'events.listening' : 'data.events is a JSON object of event definitions by type '+config.id+' is listening for on '+path
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}
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},
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onStart : function(socket){
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this.trigger(
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'start',
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socket
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);
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},
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start : function(){
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if(!this.path){
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server.log('Socket Server Path not specified, refusing to start'.warn);
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return;
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}
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fs.unlink(
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this.path,
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(
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function(server){
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return function () {
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server.log('starting server on '.debug,server.path.variable,((server.port)?':'+server.port:'').variable);
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if(!server.udp4 && !server.udp6){
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server.server=net.createServer(
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serverCreated
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);
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}else{
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function UDPWrite(message,socket){
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var data=new Buffer(message, server.config.encoding);
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server.server.send(
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data,
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0,
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data.length,
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socket.port,
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socket.address,
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function(err, bytes) {
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if(err){
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server.trigger(
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'error',
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function(err){
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server.trigger('error',err);
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}
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);
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}
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}
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);
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}
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server.server=dgram.createSocket(
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((server.udp4)? 'udp4':'udp6')
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);
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server.server.write=UDPWrite;
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server.server.on(
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'listening',
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function () {
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serverCreated(server.server)
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}
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);
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}
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function serverCreated(socket) {
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server.sockets.push(socket);
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if(socket.setEncoding)
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socket.setEncoding(server.config.encoding);
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server.log('## socket connection to server detected ##'.rainbow);
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socket.on(
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'close',
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function(socket){
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server.trigger(
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'close',
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socket
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);
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}
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);
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socket.on(
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'error',
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function(err){
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server.trigger('error',err);
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}
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);
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socket.on(
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'data',
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function(data,UDPSocket){
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var sock=((server.udp4 || server.udp6)? UDPSocket : socket);
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if(server.config.rawBuffer){
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data=new Buffer(data,this.encoding);
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server.trigger(
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'data',
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data,
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sock
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);
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return;
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}
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if(!this.ipcBuffer)
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this.ipcBuffer='';
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data=(this.ipcBuffer+=data);
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if(data.slice(-1)!=eventParser.delimiter || data.indexOf(eventParser.delimiter) == -1){
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server.log('Implementing larger buffer for this socket message. You may want to consider smaller messages'.notice);
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return;
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}
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this.ipcBuffer='';
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data=eventParser.parse(data);
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while(data.length>0){
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var e=JSON.parse(data.shift());
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server.log('received event of : '.debug,e.type.data,e.data);
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if(e.data.id)
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sock.id=e.data.id;
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server.trigger(
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e.type,
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e.data,
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sock
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);
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}
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}
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);
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socket.on(
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'message',
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function(msg,rinfo) {
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if (!rinfo)
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return;
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server.log('Received UDP message from '.debug, rinfo.address.variable, rinfo.port);
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var data;
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if(server.config.rawSocket){
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data=new Buffer(msg,this.encoding);
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}else{
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data=msg.toString();
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}
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socket.emit('data',data,rinfo);
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}
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);
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server.trigger(
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'connect',
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socket
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);
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if(server.config.rawBuffer){
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return;
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}
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server.trigger(
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'get.events.broadcasting',
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socket
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);
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server.trigger(
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'get.events.listening',
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socket
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);
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}
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function started(socket){
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server.onStart(socket)
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}
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if(!port){
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server.log('starting server as'.debug, 'Unix Socket'.variable);
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server.server.listen(
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server.path,
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started
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);
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server.server.maxConnections=server.maxConnections;
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return;
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}
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if(!server.udp4 && !server.udp4){
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server.log('starting server as'.debug, 'TCP'.variable);
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server.server.listen(
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server.port,
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server.path,
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started
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);
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return;
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}
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server.log('starting server as'.debug,((server.udp4)? 'udp4':'udp6').variable);
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server.server.bind(
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server.port,
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server.path
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);
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started(
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{
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address : server.path,
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port : server.port
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}
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);
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}
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}
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)(this)
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);
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}
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};
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new pubsub(server);
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server.on(
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'get.events.broadcasting',
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function(socket){
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server.emit(
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socket,
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'events.broadcasting',
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{
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id : server.config.id,
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events : server.define.broadcast
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}
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);
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}
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);
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server.on(
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'get.events.listening',
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function(socket){
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server.emit(
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socket,
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'events.listening',
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{
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id : server.config.id,
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events : server.define.listen,
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}
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);
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}
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)
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server.on(
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'close',
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function(){
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for(var i=0, count=server.sockets.length; i<count; i++){
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var socket=server.sockets[i];
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var destroyedSocketId=false;
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if(socket){
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if(socket.readable)
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continue;
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}
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if(socket.id)
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destroyedSocketId=socket.id;
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server.log('socket disconnected'.notice,' '+destroyedSocketId.variable);
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if(socket)
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socket.destroy();
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server.sockets.splice(i,1);
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server.trigger('socket.disconnected', socket, destroyedSocketId);
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return;
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}
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}
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);
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return server;
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}
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module.exports=init;
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