Update

Author: alopatindev

redirect-searxng-on-failure.js

@@ -2,7 +2,7 @@
 // @name Redirect SearXNG On Failure
 // @description Redirect to a random SearXNG instance in case of error and empty result
 // @icon https://www.google.com/s2/favicons?sz=64&domain=searx.space
-// @version 0.2
+// @version 0.3
 // @downloadURL https://userscripts.codonaft.com/redirect-searxng-on-failure.js
 // ==/UserScript==
 
@@ -11,12 +11,12 @@
 
   if (performance.getEntriesByType('navigation')[0]?.responseStatus !== 200) return;
   const b = document.body;
-  if (!document.head.querySelector('link[type="application/opensearchdescription+xml"]')?.title?.includes('SearXNG') && !b.querySelector('a[href="https://searx.space"]')?.textContent?.includes('Public instances')) return;
+  if (!document.head.querySelector('link[type="application/opensearchdescription+xml"]')?.title?.toLowerCase().includes('searx') && ![...b.querySelectorAll('a[href="https://searx.space"]')].find(i => i.textContent?.includes('Public instances'))) return;
 
   const hasResults = (b.querySelector('td.response-time') || !b.querySelector('td.response-error')) && !b.querySelector('div.dialog-error-block')?.innerText.includes('No results were found');
   if (hasResults) return;
 
-  console.log('SearXNG: no results');
+  console.log('no SearXNG results');
   const url = new URL(window.location.href);
   if (url.hostname.endsWith('.onion')) {
     url.host = 'codonaftbvv4j5k7nsrdivbdblycqrng5ls2qkng6lm77svepqjyxgid.onion';
@@ -30,6 +30,27 @@
   }
   url.pathname = '/searxng';
   url.searchParams.set('fast', '0');
+
+  const postRequest = !url.searchParams.has('q');
+  if (postRequest) {
+    console.log('post request');
+    const query = b.querySelector('input#q')?.value;
+    if (!query) {
+      console.log('no query found');
+      return;
+    }
+    url.searchParams.set('q', query);
+
+    const categories = [...b.querySelectorAll('div#categories button.selected')];
+    if (categories.length > 0) {
+      url.searchParams.set('categories', categories
+        .map(i => i.name.split('_')[1])
+        .filter(i => i)
+        .join(',')
+      );
+    }
+  }
+
   const params = url.searchParams.toString();
   url.search = '';
   window.location.replace(`${url.toString()}#${params}`);