NodeJs Tail to browser window

webtail.js

var http = require('http');
var spawn = require('child_process').spawn;

http.createServer(function(request,response){

	response.writeHead(200,{
		'Content-Type' : 'text/plain'
	});

	var directory = 'C:\\ColdFusion9\\logs\\';
	var filename = process.argv[2];

	if( filename ) {
		var tail_child = spawn('powershell', ['Get-Content',directory + filename + '.log','-Wait'] );
		
		tail_child.stdout.on('data',function(data){
			console.log(data.toString());
			response.write(data);
		});	

	} else {
		console.log("Please pass in the name of the log you want to read");
	}

}).listen(8000);