/
server.js
75 lines (57 loc) · 1.76 KB
/
server.js
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var net = require("net")
var argv = require("optimist").argv
var setTimeout = require("timers").setTimeout
var Buffer = require("buffer").Buffer
var buffered = argv.buffered
// Create TCP server
//
// Each connection gets stored in an array
// Every message written to the socket gets rewritten to all
// connected sockets
//
var server = (function () {
var sockets = []
var server = net.createServer(function (socket) {
sockets.push(socket)
var relayer = buffered ? BufferedRelay(sockets) :
StandardRelay(sockets)
socket.on("data", relayer)
socket.once("close", function () {
sockets.splice(sockets.indexOf(socket), 1)
})
})
return server
}())
// The standard way to forward data to other sockets is to just
// write it
function StandardRelay(sockets) {
return function ondata(chunk) {
for (var i = 0; i < sockets.length; i++) {
sockets[i].write(chunk)
}
}
}
// Instead of writing each message immediately we buffer up
// messages into a larger buffer and send it at once after 50ms
function BufferedRelay(sockets) {
var chunks = []
return function ondata(chunk) {
if (chunks.length === 0) {
chunks.push(chunk)
setTimeout(function () {
var allChunks = Buffer.concat(chunks)
for (var i = 0; i < sockets.length; i++) {
sockets[i].write(allChunks)
}
chunks.length = 0
}, 50)
} else {
chunks.push(chunk)
}
}
}
var TCP_PORT = 10251
server.listen(TCP_PORT)
var strategy = buffered ? "buffered relay" : "plain relay"
console.log("running on port", 10251, "using strategy", strategy)
require("../print-stats")