Various bug fixes for URI format parsing

backend/src/core/proxy-utils/producers/qx.js

@@ -144,9 +144,6 @@ function trojan(proxy) {
         }
     }
 
-    // tls
-    appendIfPresent(`,over-tls=${proxy.tls}`, 'tls');
-
     // tls fingerprint
     appendIfPresent(
         `,tls-cert-sha256=${proxy['tls-fingerprint']}`,

backend/src/core/proxy-utils/producers/utils.js

@@ -25,5 +25,6 @@ export class Result {
 }
 
 export function isPresent(obj, attr) {
-    return typeof _.get(obj, attr) !== 'undefined';
+    const data = _.get(obj, attr);
+    return typeof data !== 'undefined' && data !== null;
 }