Fix authenticated media download (#1947)

* remove dead function

* fix media download in room timeline

* authenticate remaining media endpoints

src/app/components/message/content/ThumbnailContent.tsx

@@ -2,9 +2,9 @@ import { ReactNode, useCallback, useEffect } from 'react';
 import { IThumbnailContent } from '../../../../types/matrix/common';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
-import { getFileSrcUrl } from './util';
-import { mxcUrlToHttp } from '../../../utils/matrix';
+import { decryptFile, downloadEncryptedMedia, mxcUrlToHttp } from '../../../utils/matrix';
 import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
+import { FALLBACK_MIMETYPE } from '../../../utils/mimeTypes';
 
 export type ThumbnailContentProps = {
   info: IThumbnailContent;
@@ -15,17 +15,23 @@ export function ThumbnailContent({ info, renderImage }: ThumbnailContentProps) {
   const useAuthentication = useMediaAuthentication();
 
   const [thumbSrcState, loadThumbSrc] = useAsyncCallback(
-    useCallback(() => {
+    useCallback(async () => {
       const thumbInfo = info.thumbnail_info;
       const thumbMxcUrl = info.thumbnail_file?.url ?? info.thumbnail_url;
+      const encInfo = info.thumbnail_file;
       if (typeof thumbMxcUrl !== 'string' || typeof thumbInfo?.mimetype !== 'string') {
         throw new Error('Failed to load thumbnail');
       }
-      return getFileSrcUrl(
-        mxcUrlToHttp(mx, thumbMxcUrl, useAuthentication) ?? '',
-        thumbInfo.mimetype,
-        info.thumbnail_file
-      );
+
+      const mediaUrl = mxcUrlToHttp(mx, thumbMxcUrl, useAuthentication) ?? thumbMxcUrl;
+      if (encInfo) {
+        const fileContent = await downloadEncryptedMedia(mediaUrl, (encBuf) =>
+          decryptFile(encBuf, thumbInfo.mimetype ?? FALLBACK_MIMETYPE, encInfo)
+        );
+        return URL.createObjectURL(fileContent);
+      }
+
+      return mediaUrl;
     }, [mx, info, useAuthentication])
   );