Add compatibility with axios and jquery.ajax

lib/middleware.js

@@ -47,7 +47,11 @@ export default function apiMiddleware({ dispatch, getState }) {
       apiCallFunction(dispatch)
         .then(response => {
           // if it's a json response, we unpack and parse it
-          if (response.headers.get('content-type') === 'application/json') {
+          if (
+            response.headers &&
+            typeof response.headers.get === 'function' &&
+            response.headers.get('content-type') === 'application/json'
+          ) {
             response.json().then(data => {
               response.data = data; // from backend response
               dispatch({ extraData, response, type: types.success });
@@ -60,7 +64,11 @@ export default function apiMiddleware({ dispatch, getState }) {
         })
         .catch(error => {
           // if it's a json response, we unpack and parse it
-          if (error.headers && error.headers.get('content-type') === 'application/json') {
+          if (
+            error.headers &&
+            typeof error.headers.get === 'function' &&
+            error.headers.get('content-type') === 'application/json'
+          ) {
             error.json().then(data => {
               error.data = data; // form backend error
               dispatch({ extraData, error, response: error, type: types.failure });