server.js

(function() {
    var http  = require("http"),
        child = require("child_process"),
        url   = require("url"),
        stream = require("stream");
        
    http.createServer(function(req, res) {
        var params  = url.parse(req.url, true),
            args    = params.query.args ? JSON.parse(params.query.args) : [],
            cmd     = params.pathname.substr(1),
            command = child.spawn(cmd, args),
            output  = new stream.PassThrough();
        
        command.on("error", function(error) {
            res.writeHead(500, {"Content-type": "text/plain"});
            res.end((error ? error + "" : ":(") + "\n");
        });
        
        
        res.writeHead(200, {"Content-type": "text/plain"});
        output.pipe(res);
        command.stdout.pipe(output);
        command.stderr.pipe(output);
    }).listen(12000);
    
    // curl 'http://127.0.0.1:12000/uname'
    // curl 'http://127.0.0.1:12000/uname?args=\["-a"\]'
})();