curl node repl (possibly dangerous?)

output.log

josh@onix:/tmp/http-repl$ curl -sSNT. localhost:8000
Actual repl over http. NOW WITH A LIMITED CONTEXT!!
>> help
'Exits are North, South and Dennis.'
>> .exit

Terminal exiting.
You'll want to mash ctrl-c.
^C
josh@onix:/tmp/http-repl$ 

repl.js

var http = require('http');
var repl = require('repl');
var Stream = require('stream');
var vm = require('vm');
var buf0 = new Buffer([0]);

var server = http.createServer(function (req, res) {
    if (!req.headers['user-agent'].match('curl/')) {
        res.setHeader('content-type', 'text/plain');
        return res.end('curl -sSNT. localhost:8000');
    }
    
    res.setHeader('content-type', 'multipart/octet-stream');
    res.write('Actual repl over http. NOW WITH A LIMITED CONTEXT!!\r\n');
    
    var stream = new Stream();
    stream.readable = true;
    stream.writable = true;
    
    stream.write = function (data) {
        res.write(data);
    };
    
    stream.resume = function () {
        req.resume();
    };
    
    stream.pause = function () {
        res.pause();
    };
    
    stream.destroy = function () {
        res.write('\r\n');
        res.write('Terminal exiting.\r\n');
        res.end('You\'ll want to mash ctrl-c.\r\n');
        delete stream;
    };
    
    req.on('data', function (data) {
        stream.emit('data', data);
    });
    
    req.on('end', function () {
        res.end();
    });
    
    var remote = repl.start('>> ', stream);
    remote.context = vm.createContext({
        help: 'Exits are North, South and Dennis.'
    });
    
    var iv = setInterval(function () {
        res.write(buf0);
    }, 100);
    
    res.on('end', function () {
        clearInterval(iv);
    });
});
server.listen(8000, 'localhost', function () {
    console.log('curl -sSNT. localhost:8000');
});