node-ipc/dao/socketServer.js
2016-03-23 00:07:37 -07:00

374 lines
13 KiB
JavaScript

'use strict';
const net = require('net'),
tls = require('tls'),
fs = require('fs'),
dgram = require('dgram'),
eventParser = require('./eventParser.js'),
Pubsub = require('event-pubsub'),
Message = require('js-message');
function emit(socket, type, data){
this.log('dispatching event to socket', ' : ', type, data);
let message=new Message;
message.type=type;
message.data=data;
if(this.config.rawBuffer){
console.log(this.config.encoding)
message=new Buffer(type,this.config.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 ', this.path,' : ', ((this.port)?this.port:''), type, data);
let message=new Message;
message.type=type;
message.data=data;
if(this.config.rawBuffer){
message=new Buffer(type,this.config.encoding);
}else{
message=eventParser.format(message);
}
if(this.udp4 || this.udp6){
for(let i=1, count=this.sockets.length; i<count; i++){
this.server.write(message,this.sockets[i]);
}
}else{
for(let i=0, count=this.sockets.length; i<count; i++){
this.sockets[i].write(message);
}
}
}
function init(path,config,log,port){
let server={
config : config,
path : path,
port : port,
udp4 : false,
udp6 : false,
log : log,
server : false,
sockets : [],
emit : emit,
broadcast : broadcast,
onStart : function onStart(socket){
this.trigger(
'start',
socket
);
},
stop:function stop(){
server.server.close();
},
start : function start(){
if(!this.path){
server.log('Socket Server Path not specified, refusing to start');
return;
}
fs.unlink(
this.path,
function () {
server.log(
'starting server on ',server.path,
((server.port)?`:${server.port}`:'')
);
if(!server.udp4 && !server.udp6){
if(!server.config.tls){
server.server=net.createServer(
serverCreated
);
}else{
server.log('starting TLS server',server.config.tls);
if(server.config.tls.private){
server.config.tls.key=fs.readFileSync(server.config.tls.private);
}else{
server.config.tls.key=fs.readFileSync(`${__dirname}/../local-node-ipc-certs/private/server.key`);
}
if(server.config.tls.public){
server.config.tls.cert=fs.readFileSync(server.config.tls.public);
}else{
server.config.tls.cert=fs.readFileSync(`${__dirname}/../local-node-ipc-certs/server.pub`);
}
if(server.config.tls.dhparam){
server.config.tls.dhparam=fs.readFileSync(server.config.tls.dhparam);
}
if(server.config.tls.trustedConnections){
if(typeof server.config.tls.trustedConnections === 'string'){
server.config.tls.trustedConnections=[server.config.tls.trustedConnections];
}
server.config.tls.ca=[];
for(let i=0; i<server.config.tls.trustedConnections.length; i++){
server.config.tls.ca.push(
fs.readFileSync(server.config.tls.trustedConnections[i])
);
}
}
server.server=tls.createServer(
server.config.tls,
serverCreated
);
}
}else{
function UDPWrite(message,socket){
let data=new Buffer(message, server.config.encoding);
server.server.send(
data,
0,
data.length,
socket.port,
socket.address,
function(err, bytes) {
if(err){
server.log('error writing data to socket',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);
}
);
}
server.server.on(
'error',
function(err){
server.log('server error',err);
server.trigger(
'error',
err
);
}
);
server.server.maxConnections=server.config.maxConnections;
function serverCreated(socket) {
server.sockets.push(socket);
if(socket.setEncoding){
socket.setEncoding(server.config.encoding);
}
server.log('## socket connection to server detected ##');
socket.on(
'close',
function(socket){
server.trigger(
'close',
socket
);
}
);
socket.on(
'error',
function(err){
server.log('server socket error',err);
server.trigger('error',err);
}
);
socket.on(
'data',
function(data,UDPSocket){
let sock=((server.udp4 || server.udp6)? UDPSocket : socket);
if(server.config.rawBuffer){
data=new Buffer(data,server.config.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('Messages are large, You may want to consider smaller messages.');
return;
}
this.ipcBuffer='';
data=eventParser.parse(data);
while(data.length>0){
let message=new Message;
message.load(data.shift());
server.log('received event of : ',message.type,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 ', rinfo.address, rinfo.port);
let data;
if(server.config.rawSocket){
data=new Buffer(msg,server.config.encoding);
}else{
data=msg.toString();
}
socket.emit('data',data,rinfo);
}
);
server.trigger(
'connect',
socket
);
if(server.config.rawBuffer){
return;
}
}
function started(socket){
server.onStart(socket);
}
if(!port){
server.log('starting server as', 'Unix || Windows Socket');
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
);
return;
}
if(!server.udp4 && !server.udp6){
server.log('starting server as', (server.config.tls?'TLS':'TCP'));
server.server.listen(
server.port,
server.path,
started
);
return;
}
server.log('starting server as',((server.udp4)? 'udp4':'udp6'));
server.server.bind(
server.port,
server.path
);
started(
{
address : server.path,
port : server.port
}
);
}
);
}
};
new Pubsub(server);
server.on(
'close',
function(){
for(let i=0, count=server.sockets.length; i<count; i++){
let socket=server.sockets[i];
let destroyedSocketId=false;
if(socket){
if(socket.readable){
continue;
}
}
if(socket.id){
destroyedSocketId=socket.id;
}
server.log('socket disconnected',destroyedSocketId.toString());
if(socket && socket.destroy){
socket.destroy();
}
server.sockets.splice(i,1);
server.trigger('socket.disconnected', socket, destroyedSocketId);
return;
}
}
);
return server;
}
module.exports=init;