Upload a file to OCI Object Storage using a Pre-Authenticated Request (PAR) 📁

OCI Object Storage has a notion of a Pre-Authenticated Request, this gives users access to a bucket or an object (file) without having provide their sign-on credentials 🪪 – all is needed is a single URL (which can have an expiration time/date on).

I’ve used PAR’s to provide read access to specific objects (files) within a storage bucket, this has been useful to quickly (and relatively securely) share content.

I recently needed to provide a user the ability to upload content to a storage bucket using a PAR, to do this I configured PAR on a bucket as follows 🪣:

However, after creating the PAR on the bucket and getting the URL, I was at a loss as to how to upload files to the bucket. If I browsed to the URL in a browser, it simply listed the files within the bucket with no visual means to upload (I was expecting a nice upload button!).

I couldn’t see any way to upload files using the OCI CLI either, after much head-scratching and experimentation it turned out that the easiest way upload a file is to use Curl

Here is the command that I used:

curl -v -X PUT --data-binary '@/Users/brendan/Downloads/MyFile.zip' PAR URL/MyFile.zip

You need to include the path to the file to upload (after the @ sign). The PAR URL provided by OCI and finally the name to give the uploaded file within the storage bucket.

Running this command successfully uploaded the file to the bucket that the PAR had been created for – result!