var http = require('http');

http.createServer(function (request, response) {
   if (request.method === 'POST') {
   });
   var data = '';
   request.addListener('data', function(chunk) { data += chunk; });
   request.addListener('end', function() {
   var stockQuery = eval("(" + data + ")");
   getStockPrice(stockQuery.symbol);

   // whatever else you do here....
});