Use built-in toString to convert buffer to hex

Author: charmander

lib/incoming_form.js

@@ -529,11 +529,8 @@ IncomingForm.prototype._initJSONencoded = function() {
 };
 
 IncomingForm.prototype._uploadPath = function(filename) {
-  var name = 'upload_';
   var buf = crypto.randomBytes(16);
-  for (var i = 0; i < buf.length; ++i) {
-    name += ('0' + buf[i].toString(16)).slice(-2);
-  }
+  var name = 'upload_' + buf.toString('hex');
 
   if (this.keepExtensions) {
     var ext = path.extname(filename);