app.js

var express = require('express');
var hasBody = require('express/node_modules/connect').utils.hasBody;
var getBody = require('express/node_modules/connect/node_modules/raw-body');
var app = express();
app.use(express.static(__dirname));
app.post('/enter', express.urlencoded(), function (req, res, next) {
  if (req.body.wifi) console.log('"' + (new Date).toGMTString() + '","enter","'+req.body.wifi+'"');
  next();
});
app.post('/leave', express.urlencoded(), function (req, res, next) {
  if (req.body.wifi) console.log('"' + (new Date).toGMTString() + '","leave","'+req.body.wifi+'"');
  next();
});
app.post('/wifi', function (req, res, next) {
  if (!hasBody(req)) return next();
  if (!req.headers['user-agent'].match(/^tasker/i)) return next();
  getBody(req, {
    limit: '1mb',
    length: req.headers['content-length'],
    encoding: 'utf8'
  }, function (err, buf) {
    if (err) return next(err);
    console.log('"' + (new Date).toGMTString() + '","enter",' + buf.split('\n')[2]);
    next();
  })
});

app.use(function (req, res) {
  res.statusCode = 204;
  res.end();
});
app.listen(8989);