sync

lib/utility/request.js

@@ -37,13 +37,25 @@ export function post(url, data, options = {}) {
             options.customHeaders['Content-Type'] = 'application/json';
         }
     }
-    return fetch(combineUrl(url), {
+    const opts = {
         method: options.method || 'POST',
         headers: options.customHeaders,
         body: data,
         signal: options.signal,
         cache: 'no-cache'
-    });
+    };
+    if (options.diagnostic) {
+        const started = new Date().getTime();
+        return new Promise((resolve, reject) => {
+            fetch(combineUrl(url), opts).then(response => {
+                resolve({
+                    time: new Date().getTime() - started,
+                    response
+                });
+            }).catch(reject);
+        });
+    }
+    return fetch(combineUrl(url), opts);
 }
 
 export function upload(url, data, options = {}) {