Assets

Reserve an Asset and mint an upload URL

Reserves an Asset and returns a presigned PUT URL to upload the bytes to. The URL is valid for one hour, and expiresAt says when it stops being accepted.

The client uploads directly to storage — the bytes never pass through this worker, because Cloudflare rejects over-limit request bodies at the proxy before any code runs. Call POST /assets/{id}/finalize once the upload completes.

The URL is the credential: anyone holding it can write that one key until it expires. Nothing is known about the file until finalize inspects what actually landed, so size and type cannot be enforced here.

The reserved Asset stays pending until finalize. No read, rename or list answers a pending Asset, and a reservation nobody finalizes is swept a day later, together with whatever landed under it.

post/assets/uploads

Request

  • Base URL: https://api.adcrunch.dev
  • URL: https://api.adcrunch.dev/assets/uploads
  • Auth: HTTP bearer

Request body

filenamestring required

The name of the file you are about to send. Shown until somebody renames the Asset, and never used to look one up.

Example request

{
  "filename": "spring-sale.mp4"
}

Response

The reservation. Send the bytes to uploadUrl, then finalize assetId.

assetIdstring required

The Asset this reservation made. Finalize it with this id.

expiresAtnumber required

When the upload URL stops being accepted, in milliseconds since the Unix epoch, UTC.

uploadUrlstring required

PUT the bytes here, directly. The URL is the credential: anybody holding it can write that one object until it expires.

Example response

{
  "assetId": "ast_7c1e9a",
  "expiresAt": 1790003600000,
  "uploadUrl": "https://b7f3c81a29d64e0fa5c3d1e8b0947265.r2.cloudflarestorage.com/assets/org_3a7f10/ast_7c1e9a?X-Amz-Expires=3600&X-Amz-Date=20260921T141320Z&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=4f8e2a6c1b9d7e3f5a0c2b4d6e8f1a3c%2F20260921%2Fauto%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Signature=7d1c4a9f2e8b0536c1a7e94d2b6f038a5c1e9b7d3f6a2c805d4e1b93a7f0c625"
}

Changes

No recorded changes to this operation across all 1 revision of this API.