Use .read() to get response body instead of accessing internal buff…

…er directly

lib/app/request.js

@@ -107,13 +107,18 @@ module.exports = function request( /* address, body, cb */ ) {
 
     // Only dump the buffer if a callback was supplied
     if (cb) {
-      clientRes.body = Buffer.concat(clientRes._readableState.buffer).toString();
+
+      // Attempt to read the response buffer into a string
       try {
-        clientRes.body = JSON.parse(clientRes.body);
+        clientRes.body = clientRes.read();
+        if (clientRes.body !== null) {
+          clientRes.body = clientRes.body.toString();
+          clientRes.body = JSON.parse(clientRes.body);
+        }
       } catch (e) {}
 
       // Don't include body if it is empty
-      if (!clientRes.body) delete clientRes.body;
+      if (!clientRes.body) {delete clientRes.body;}
 
       // If status code is indicative of an error, send the
       // response body or status code as the first error argument.