Cloudflare Developers•10mo ago

Proxy video from Google Cloud Storage

I'm using the REST API for GCP Cloud Storage to fetch JSON documents without any problems, but when I'm trying a .webm or .mp4 video, I keep getting only the JSON metadata (same you get if you don't add the "?alt=media" querystring to the Cloud Storage call. The strange thing is, I can easily proxy .webm videos from other sites. It's almost if Cloudflare Workers is rewriting the HTTP headers in the sub requests. Anyone know anything about this?

1 Reply

lasseschou•10mo ago

Just to elaborate, the URL for the Google Cloud Storage file is: https://www.googleapis.com/storage/v1/b/{bucket-name}/o/{path-to-file.webm}?alt=media With a "Bearer XXX" authentication token. When trying from PostMan, everything works fine. When trying to fetch another webm video (like this: return fetch("https://dl6.webmfiles.org/big-buck-bunny_trailer.webm"); - it works fine. But when I try the Google Storage link, the result is JSON:

{
  "kind": "storage#object",
  "id": "xxx",
  "selfLink": "https://www.googleapis.com/storage/v1/b/xxx/video.webm",
  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/xxx/video.webm?generation=1691354946850085&alt=media",
  "name": "xxx/video.webm",
  "bucket": "bucket-name",
  "generation": "1691354946850085",
  "metageneration": "1",
  "contentType": "video/webm",
  "storageClass": "STANDARD",
  "size": "2040129",
  "md5Hash": "xxx==",
  "crc32c": "52dNRg==",
  "etag": "xxx=",
  "timeCreated": "2023-08-06T20:49:06.853Z",
  "updated": "2023-08-06T20:49:06.853Z",
  "timeStorageClassUpdated": "2023-08-06T20:49:06.853Z"
}

{
  "kind": "storage#object",
  "id": "xxx",
  "selfLink": "https://www.googleapis.com/storage/v1/b/xxx/video.webm",
  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/xxx/video.webm?generation=1691354946850085&alt=media",
  "name": "xxx/video.webm",
  "bucket": "bucket-name",
  "generation": "1691354946850085",
  "metageneration": "1",
  "contentType": "video/webm",
  "storageClass": "STANDARD",
  "size": "2040129",
  "md5Hash": "xxx==",
  "crc32c": "52dNRg==",
  "etag": "xxx=",
  "timeCreated": "2023-08-06T20:49:06.853Z",
  "updated": "2023-08-06T20:49:06.853Z",
  "timeStorageClassUpdated": "2023-08-06T20:49:06.853Z"
}

Which is what you would expect if the "?alt=media" querystring wasn't added. I can't wrap my head around this, unless Cloudflare is somehow removing the querystring. But when I just request a JSON document, I get the real content of the remote file, not the metadata. So I have no idea what's going on. Turned out that only files with .json, .txt and without extension are allowed. No idea if this is caused by a special header sent by Cloudflare, or what's going on. But the fix was to store the file without an extension

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Proxy video from Google Cloud Storage