The Tor Browser / file revision

 const CC = Components.Constructor;

 const BinaryInputStream = CC("@mozilla.org/binaryinputstream;1",

                              "nsIBinaryInputStream",

                              "setInputStream");

 function handleRequest(request, response)

 {

   response.setHeader("Content-Type", "text/plain");

   if (request.method == "GET") {

      response.write(request.queryString);

      return;

   }

   var bodyStream = new BinaryInputStream(request.bodyInputStream);

   var body = "";

   var bodyAvail;

   while ((bodyAvail = bodyStream.available()) > 0)

     body += String.fromCharCode.apply(null, bodyStream.readByteArray(bodyAvail));

   response.write(body);

 }