Fix changing request by reference

Author: Pedro Branco

index.js

@@ -2,23 +2,31 @@ var clone = require('stringify-clone');
 
 var debugId = 0
 
-module.exports = exports = function(request, log) {
+module.exports = exports = function(requestObj, log) {
   log = log || exports.log
 
+  var request = requestObj
   var proto
-  if (request.Request) {
-    proto = request.Request.prototype
-  } else if (request.get && request.post) {
+
+  if (requestObj.Request) {
+    request = requestObj.defaults({});
+  }
+
+  if (request.get && request.post) {
     // The object returned by request.defaults() doesn't include the
     // Request property, so do this horrible thing to get at it.  Per
     // Wikipedia, port 4 is unassigned.
-    var req = request('http://localhost:4').on('error', function() { })
-    proto = req.constructor.prototype
+    var Request = request('http://localhost:4').on('error', function() { })
+
+    request.Request = Object.assign({}, Request);
+    request.Request.prototype = Object.assign({}, Request.prototype);
   } else {
     throw new Error(
       "Pass the object returned by require('request') to this function.")
   }
 
+  proto = request.Request.prototype
+
   if (!proto._initBeforeDebug) {
     proto._initBeforeDebug = proto.init
 
@@ -83,6 +91,8 @@ module.exports = exports = function(request, log) {
       delete proto._initBeforeDebug
     }
   }
+
+  return request;
 }
 
 exports.log = function(type, data, r) {