#nodejs module.exports VS. exports.function

outvar_fun_name.js

var url = require("url");
exports.fun = function (postReq, my_callback){
    var fileName = url.parse(postReq.fileurl).pathname.split('/').pop();
    my_callback('fileName=' + fileName);
}

outvar_fun_noname.js

var url = require("url");
module.exports = function (postReq, my_callback){
	var fileName = url.parse(postReq.fileurl).pathname.split('/').pop();
	my_callback('fileName=' + fileName);
}

router_fun_name.js

var outvarBack = require('./outvar_fun_name');
outvarBack.fun( req.body, function (result) {          
    console.log('[router]'+result);
});

router_fun_noname.js

require('./outvar_fun_noname')(req.body, function (result) {          
    console.log('[router] '+result);
});