migrate to axios, front-end part of configurable ServerAddress

webUI/react/src/util/client.tsx

@@ -1,10 +1,26 @@
-import axios from 'axios';
-import storage from './storage';
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-const clientMaker = () => axios.create({
-    baseURL: storage.getItem('baseURL', 'http://127.0.0.1:4567'),
+import axios from 'axios';
+import storage from './localStorage';
+
+const { hostname, port, protocol } = window.location;
+
+// if port is 3000 it's probably running from webpack devlopment server
+let inferredPort;
+if (port === '3000') { inferredPort = '4567'; } else { inferredPort = port; }
+
+const client = axios.create({
+    // baseURL must not have traling slash
+    baseURL: storage.getItem('serverBaseURL', `${protocol}//${hostname}:${inferredPort}`),
 });
 
-const client = clientMaker();
+client.interceptors.request.use((config) => {
+    if (config.data instanceof FormData) {
+        Object.assign(config.headers, { 'Content-Type': 'multipart/form-data' });
+    }
+    return config;
+});
 
 export default client;