How to set metadata on a file on Upload (S3/Cache-Control usecase)

[Thomas_Pucci]

Hi there!
We are using Retool to upload to S3 some images.

Our issue is that we did not find a way to set up the Cache Control metadata on file upload.

Is that possible with Retool ?

Cheers,

Thomas

[Shawn_Optipath]

Hi @Thomas_Pucci,

Welcome to the Retool community!

Yes , this should be possible, but not directly from the standard Retool S3 “Upload file” GUI action. When uploading to Amazon S3, Cache-Control is part of the object’s metadata. Retool’s built-in S3 resource upload does not currently expose a field for setting Cache-Control headers during upload. @Tess confirmed this a while ago here. Please do give this a +1 and I will do the same.

You could do this with a REST Query:

PUT ``https://your-bucket.s3.amazonaws.com/your-key

With headers like:
Content-Type: image/webp
Cache-Control: public, max-age=31536000, immutable

I hope this helps.

[Thomas_Pucci]

Thanks!
I am not sure to understand how to pass the credential in that put request.

[Shawn_Optipath]

You would need to set up a resource first:

Pick your REST API:

Then add your details here:

Once your resource is set up you can reference it either in an app or a worfkflow.

[Thomas_Pucci]

Thanks ! I’ll have a look