node-ipc
Version:
A nodejs module for local and remote Inter Process Communication (IPC), Neural Networking, and able to facilitate machine learning.
361 lines (306 loc) • 13.7 kB
JavaScript
var net = require('net'),
fs = require('fs'),
dgram = require('dgram'),
eventParser = require('../lib/eventParser.js'),
pubsub = require('event-pubsub'),
Message = require('js-message');
function emit(socket, type, data){
this.log('dispatching event to socket'.debug, ' : ', type.data, data);
var message=new Message;
message.type=type;
message.data=data;
if(this.config.rawBuffer){
message=new Buffer(type,this.encoding);
}else{
message=eventParser.format(message);
}
if(this.udp4 || this.udp6){
if(!socket.address || !socket.port){
this.log('Attempting to emit to a single UDP socket without supplying socket address or port. Redispatching event as broadcast to all connected sockets');
this.broadcast(type,data);
return;
}
this.server.write(
message,
socket
);
return;
};
socket.write(message);
};
function broadcast(type,data){
this.log('broadcasting event to all known sockets listening to '.debug, this.path.variable,' : ', ((this.port)?this.port:''), type, data);
var message=new Message;
message.type=type;
message.data=data;
if(this.config.rawBuffer){
message=new Buffer(type,this.encoding);
}else{
message=eventParser.format(message);
}
if(this.udp4 || this.udp6){
for(var i=1, count=this.sockets.length; i<count; i++){
this.server.write(message,this.sockets[i]);
}
}else{
for(var i=0, count=this.sockets.length; i<count; i++){
this.sockets[i].write(message);
}
}
};
function init(path,config,log,port){
var server={
config : config,
path : path,
port : port,
udp4 : false,
udp6 : false,
log : log,
server : false,
sockets : [],
emit : emit,
broadcast : broadcast,
define : {
listen : {
'get.events.broadcasting' : 'does not require any special paramaters',
'get.events.listening' : 'does not require any special paramaters'
},
broadcast : {
'events.broadcasting' : 'data.events is a JSON object of event definitions by type '+config.id+' will broadcast on '+path,
'events.listening' : 'data.events is a JSON object of event definitions by type '+config.id+' is listening for on '+path
}
},
onStart : function(socket){
this.trigger(
'start',
socket
);
},
start : function(){
if(!this.path){
server.log('Socket Server Path not specified, refusing to start'.warn);
return;
}
fs.unlink(
this.path,
(
function(server){
return function () {
server.log('starting server on '.debug,server.path.variable,((server.port)?':'+server.port:'').variable);
if(!server.udp4 && !server.udp6){
server.server=net.createServer(
serverCreated
);
}else{
function UDPWrite(message,socket){
var data=new Buffer(message, server.config.encoding);
server.server.send(
data,
0,
data.length,
socket.port,
socket.address,
function(err, bytes) {
if(err){
server.trigger(
'error',
function(err){
server.trigger('error',err);
}
);
}
}
);
}
server.server=dgram.createSocket(
((server.udp4)? 'udp4':'udp6')
);
server.server.write=UDPWrite;
server.server.on(
'listening',
function () {
serverCreated(server.server)
}
);
}
function serverCreated(socket) {
server.sockets.push(socket);
if(socket.setEncoding)
socket.setEncoding(server.config.encoding);
server.log('## socket connection to server detected ##'.rainbow);
socket.on(
'close',
function(socket){
server.trigger(
'close',
socket
);
}
);
socket.on(
'error',
function(err){
server.trigger('error',err);
}
);
socket.on(
'data',
function(data,UDPSocket){
var sock=((server.udp4 || server.udp6)? UDPSocket : socket);
if(server.config.rawBuffer){
data=new Buffer(data,this.encoding);
server.trigger(
'data',
data,
sock
);
return;
}
if(!this.ipcBuffer)
this.ipcBuffer='';
data=(this.ipcBuffer+=data);
if(data.slice(-1)!=eventParser.delimiter || data.indexOf(eventParser.delimiter) == -1){
server.log('Implementing larger buffer for this socket message. You may want to consider smaller messages'.notice);
return;
}
this.ipcBuffer='';
data=eventParser.parse(data);
while(data.length>0){
var message=new Message;
message.load(data.shift());
server.log('received event of : '.debug,message.type.data,message.data);
if(message.data.id)
sock.id=message.data.id;
server.trigger(
message.type,
message.data,
sock
);
}
}
);
socket.on(
'message',
function(msg,rinfo) {
if (!rinfo)
return;
server.log('Received UDP message from '.debug, rinfo.address.variable, rinfo.port);
var data;
if(server.config.rawSocket){
data=new Buffer(msg,this.encoding);
}else{
data=msg.toString();
}
socket.emit('data',data,rinfo);
}
);
server.trigger(
'connect',
socket
);
if(server.config.rawBuffer){
return;
}
server.trigger(
'get.events.broadcasting',
socket
);
server.trigger(
'get.events.listening',
socket
);
}
function started(socket){
server.onStart(socket)
}
if(!port){
server.log('starting server as'.debug, 'Unix || Windows Socket'.variable);
if (process.platform ==='win32'){
server.path = server.path.replace(/^\//, '');
server.path = server.path.replace(/\//g, '-');
server.path= '\\\\.\\pipe\\'+server.path;
}
server.server.listen(
server.path,
started
);
server.server.maxConnections=server.maxConnections;
return;
}
if(!server.udp4 && !server.udp4){
server.log('starting server as'.debug, 'TCP'.variable);
server.server.listen(
server.port,
server.path,
started
);
return;
}
server.log('starting server as'.debug,((server.udp4)? 'udp4':'udp6').variable);
server.server.bind(
server.port,
server.path
);
started(
{
address : server.path,
port : server.port
}
);
}
}
)(this)
);
}
};
new pubsub(server);
server.on(
'get.events.broadcasting',
function(socket){
server.emit(
socket,
'events.broadcasting',
{
id : server.config.id,
events : server.define.broadcast
}
);
}
);
server.on(
'get.events.listening',
function(socket){
server.emit(
socket,
'events.listening',
{
id : server.config.id,
events : server.define.listen,
}
);
}
)
server.on(
'close',
function(){
for(var i=0, count=server.sockets.length; i<count; i++){
var socket=server.sockets[i];
var destroyedSocketId=false;
if(socket){
if(socket.readable)
continue;
}
if(socket.id)
destroyedSocketId=socket.id;
server.log('socket disconnected'.notice,' '+destroyedSocketId.variable);
if(socket)
socket.destroy();
server.sockets.splice(i,1);
server.trigger('socket.disconnected', socket, destroyedSocketId);
return;
}
}
);
return server;
}
module.exports=init;