How to upload video files using rest API after receiving an "upload URL"

When uploading a file to S3 using a pre-signed url there are a few things you must be aware of:

1. Any header set when creating the url.

2. Any metadata set to the S3 object when creating the url.

These two are relevant, as you must set those headers when performing the PUT operation on the upload url. Whenever these headers don't match, you will get a SignatureDoesNotMatch error. On one hand, any header set when creating the pre-signed url must be passed in as it is to the PUT request. On the other hand, any metadata set to the S3 object when creating the pre-signed url must be passed in prefixed with x-amz-meta-. For instance, let's say you generate a pre-signed url to upload a jpg file:

const params = {
      Bucket: 'your-bucket',
      Key: 'your-key',
      ContentType: 'image/jpg'
   },
   preSignedUrl = await s3Client.getSignedUrlPromise(params);

Then, you must upload the image and set the Content-Type header:

curl -X PUT -H 'Content-Type=image/jpg' -d '@/Volumes/Path/To/Upload/Image' 'https://[uploadUrlFromAbove]'

In contrast, if you would like to set some custom metadata like originalFilename. You will create the pre-signed url as follow:

const params = {
      Bucket: 'your-bucket',
      Key: 'your-key',
      ContentType: 'image/jpg',
      Metadata: {
         originalFilename: 'image.jpg'
      }
   },
   preSignedUrl = await s3Client.getSignedUrlPromise(params);

And you will upload the image as:

curl -X PUT -H 'Content-Type=image/jpg' -H 'x-amz-meta-original-filename=image.jpg' -d '@/Volumes/Path/To/Upload/Image' 'https://[uploadUrlFromAbove]'

IMPORTANT TO NOTE: I intentionally chose a metadata in camel-case to illustrate that it must be changed to snake-case when writing the header. The metadata will be stored in S3 in snake-case too!

Anyhow, according to your initial question... it seems ShotGrid's documentation has the answer:

In the response for getting an upload URL one of 3 types upload URLs will be returned. The 3 possible upload URLs are, a URL to the ShotGrid application server, a pre-signed S3 upload URL, or a pre-signed S3 multi-part upload URL (for upload part 1). All 3 behave very similarly, the file data must be the body of a PUT request to the URL and the headers for Content-Type and Content-Size must be set.

Have you tried to set Content-Type and Content-Size headers when performing the PUT request?

In the ShotGrid's documentation, there is information that the upload URL which you are getting is an S3 pre-signed URL, so you don't need to add any signature. Please check this page.

Pre-signed URLs are designed to give permission to get or upload a file to S3 bucket without any additional permissions. The URL is valid for a limited amount of time.

It means that you can make PUT on this URL and just pass the file.

Make sure you have given role to access s3 to upload object and recommend to use AWS SDK Follow the format mentioned on AWS user guide then try again