Log all posted variables via a little nodejs server.

logpost.js

var http = require('http'),
    querystring = require('querystring')

var PORT = 8124;

http.createServer(function(req, res) {
    if (req.method == 'POST') {
        req.rawpostdata = '';
        req.addListener('data', function(chunk) {
            req.rawpostdata += chunk.toString('ascii'); // I hope
        });
        req.addListener('end', function() {
            req.formdata = querystring.parse(req.rawpostdata);
            var body = '====================\n';
            for (var k in req.formdata) {
                body += k+'='+req.formdata[k]+'\n';
            }
            res.writeHead(200, {'Content-Type': 'text/plain'});
            res.end(body);
            console.log(body);
        });
    } else {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Not a POST request.');
    }
}).listen(PORT);

console.log('Server running at http://127.0.0.1:/'+PORT);