Log non JSON API responses

server/public/app.js

@@ -826,10 +826,17 @@ function startResizeWindow(event, win) {
 
 async function api(url, options) {
   const response = await fetchChecked(url, options);
+  const text = await response.text();
   try {
-    return await response.json();
+    return JSON.parse(text);
   } catch (error) {
-    recordDebug('api.json.error', { url, error: serializeError(error) });
+    recordDebug('api.json.error', {
+      url,
+      status: response.status,
+      contentType: response.headers.get('content-type'),
+      body: text.slice(0, 2000),
+      error: serializeError(error)
+    });
     throw error;
   }
 }
@@ -837,12 +844,19 @@ async function api(url, options) {
 async function fetchChecked(url, options) {
   recordDebug('fetch.request', { url, method: options?.method || 'GET' });
   const response = await fetch(url, options);
-  recordDebug('fetch.response', { url, status: response.status, ok: response.ok });
+  recordDebug('fetch.response', {
+    url,
+    status: response.status,
+    ok: response.ok,
+    contentType: response.headers.get('content-type')
+  });
   if (!response.ok) {
     let message = `${response.status} ${response.statusText}`;
+    const text = await response.text();
     try {
-      message = (await response.json()).error || message;
+      message = JSON.parse(text).error || message;
     } catch {}
+    recordDebug('fetch.error.body', { url, status: response.status, body: text.slice(0, 2000) });
     throw new Error(message);
   }
   return response;