Allow URLs relative to map base in iframe / openWebsite

front/src/WebRtc/CoWebsiteManager.ts

@@ -42,7 +42,7 @@ class CoWebsiteManager {
         this.opened = iframeStates.opened;
     }
 
-    public loadCoWebsite(url: string, allowPolicy?: string): void {
+    public loadCoWebsite(url: string, base: string, allowPolicy?: string): void {
         this.load();
         this.cowebsiteDiv.innerHTML = `<button class="close-btn" id="cowebsite-close">
                     <img src="resources/logos/close.svg">
@@ -55,7 +55,7 @@ class CoWebsiteManager {
 
         const iframe = document.createElement('iframe');
         iframe.id = 'cowebsite-iframe';
-        iframe.src = url;
+        iframe.src = (new URL(url, base)).toString();
         if (allowPolicy) {
             iframe.allow = allowPolicy; 
         }