Update index.html

index.html

@@ -57,17 +57,29 @@
 
     async function del() {
       const key = document.getElementById('key').value;
-      const res = await fetch('/delete?key=' + encodeURIComponent(key));
+      const res = await fetch('/delete?key=' + encodeURIComponent(key), {
+        method: 'POST',
+        
+        headers: { 'Content-Type': 'application/json' }
+      });
       document.getElementById('output').textContent = await res.text();
     }
 
     async function all() {
-      const res = await fetch('/all');
+      const res = await fetch('/all',  {
+        method: 'POST',
+        
+        headers: { 'Content-Type': 'application/json' }
+      });
       document.getElementById('output').textContent = JSON.stringify(await res.json(), null, 2);
     }
 
     async function backup() {
-      const res = await fetch('/backup');
+      const res = await fetch('/backup',  {
+        method: 'POST',
+        
+        headers: { 'Content-Type': 'application/json' }
+      });
       document.getElementById('output').textContent = await res.text();
     }
   </script>