text: var express = require('express');
  var router = express.Router();
  
  /* GET home page. */
  router.get('/', function(req, res, next) {
    res.render('index', { title: 'JS-OScope' });
  });
  
  var heldData = [], heldReqRes;
  
  /* GET data. */
  router.put('/data', function(req, res, next) {
    heldData.push(req.body);
    if (heldReqRes) {
      heldReqRes.res.json({items:heldData});
      heldReqRes = null;
      heldData = [];
    }
    res.json({ok:true, count:heldData.length});
  });
  
  /* GET data. */
  router.get('/data', function(req, res, next) {
    if (heldData.length > 0) {
      res.json({items: heldData});
      heldData = [];
    } else {
      heldReqRes = {req:req, res:res};
    }
  });
  
  var diag = function() {
    console.log('number of held-data items: ' + heldData.length + ' holding a request: ' + !!heldReqRes);
    setTimeout(diag, 500000);
  };
  diag();
  
  module.exports = router;
  