text: var port = process.argv[2]
  var http = require('http')
  var map = require('through2-map')
  var server = http.createServer(function (req, res) {
      // request handling logic...
      if(req.method=='POST'){	
          req.pipe(map(function (chunk) {
   	return chunk.toString().toUpperCase()
      	})).pipe(res)
      }})
  server.listen(port)
  
  