web interface for tail

tail.js

var sys = require('sys');
var child = require('child_process');
var http = require('http');
var filename = process.ARGV[2];

if (!filename) {
        return sys.puts('usage: node tail.js filename');
}

var tail = child.spawn("tail", ["-f", filename]);

var server = http.createServer(function(request, response){
        response.writeHead(200, {'Content-Type': 'text/plain'});
        response.write("Hello!");
        tail.stdout.on('data', function(data){
                response.write(data);
        });
});

server.listen(3000);
console.log('server running on port 3000');