fedimbed: foiled by my own spec compliance

src/modules/fedimbed.js

@@ -1259,26 +1259,46 @@ async function processUrl(msg, url, spoiler = false, command = false) {
             });
           }
         } else if (attachment.url) {
-          const contentType = await fetch(attachment.url, {
+          let attUrl = attachment.url;
-            method: "HEAD",
+          if (Array.isArray(attachment.url)) {
-          }).then((res) => res.headers.get("Content-Type"));
+            switch (attachment.type) {
+              case "Image": {
+                const newUrl = attachment.url.find((a) => a.mediaType?.startsWith("image/"))?.href;
+                if (newUrl) attUrl = newUrl;
+                break;
+              }
+              case "Video": {
+                const newUrl = attachment.url.find((a) => a.mediaType?.startsWith("video/"))?.href;
+                if (newUrl) attUrl = newUrl;
+                break;
+              }
+              default:
+                attUrl = attachment.url[0]?.href;
+            }
+          }
+
+          let contentType;
+          if (attUrl != null)
+            contentType = await fetch(attUrl, {
+              method: "HEAD",
+            }).then((res) => res.headers.get("Content-Type"));
 
           if (contentType) {
             if (contentType.startsWith("image/")) {
               images.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: contentType,
               });
             } else if (contentType.startsWith("video/")) {
               videos.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: contentType,
               });
             } else if (contentType.startsWith("audio/")) {
               audios.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: contentType,
               });
@@ -1294,19 +1314,19 @@ async function processUrl(msg, url, spoiler = false, command = false) {
                   (url.match(/\.([a-z0-9]{3,4})$/)?.[0] ?? type == "image" ? "png" : type == "video" ? "mp4" : "mpeg");
             if (type.startsWith("image")) {
               images.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: fileType,
               });
             } else if (type.startsWith("video")) {
               videos.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: fileType,
               });
             } else if (type.startsWith("audio")) {
               audios.push({
-                url: attachment.url,
+                url: attUrl,
                 desc: attachment.name ?? attachment.description ?? attachment.comment,
                 type: fileType,
               });