Fix #3712

server/model/monitor.js

@@ -53,7 +53,7 @@ class Monitor extends BeanModel {
             obj.tags = await this.getTags();
         }
 
-        if (certExpiry && this.type === "http") {
+        if (certExpiry && this.type === "http" && this.getURLProtocol() === "https:") {
             const { certExpiryDaysRemaining, validCert } = await this.getCertExpiry(this.id);
             obj.certExpiryDaysRemaining = certExpiryDaysRemaining;
             obj.validCert = validCert;
@@ -1075,6 +1075,19 @@ class Monitor extends BeanModel {
         }
     }
 
+    /**
+     * Example: http: or https:
+     * @returns {(null|string)}
+     */
+    getURLProtocol() {
+        const url = this.getUrl();
+        if (url) {
+            return this.getUrl().protocol;
+        } else {
+            return null;
+        }
+    }
+
     /**
      * Store TLS info to database
      * @param checkCertificateResult

src/components/PublicGroupList.vue

@@ -62,7 +62,7 @@
                                             </span>
                                         </div>
                                         <div class="extra-info">
-                                            <div v-if="showCertificateExpiry && monitor.element.type === 'http'">
+                                            <div v-if="showCertificateExpiry && monitor.element.certExpiryDaysRemaining">
                                                 <Tag :item="{name: $t('Cert Exp.'), value: formattedCertExpiryMessage(monitor), color: certExpiryColor(monitor)}" :size="'sm'" />
                                             </div>
                                             <div v-if="showTags">