//file1.js
module.exports = require('tcp').crateserver....//create server only and export

//file2.js
module.exports = function class1(server){
this.server=server;
this.say=function() {
	this.server.writetoall('...')...
}
}

//main.js
var http = require('file1.js');
var class1 = require('file2.js');

c = class1(http);
c.say();