S3 Presign Responses

For client uploads, return a presigned object URL and any headers that were part of the signature.

type PresignedUrlResponse = {
    key: string
    uploadUrl: string
    uploadHeaders?: Record<string, string>
    publicUrl?: string
    downloadUrl?: string
    expiresIn: number
}

Do not sign browser-forbidden headers such as Content-Length for direct browser PUT requests. If the content type is signed, return it in uploadHeaders so upup can send the exact same value.

return Response.json({
    key,
    uploadUrl,
    uploadHeaders: {
        'Content-Type': body.type || 'application/octet-stream',
    },
    downloadUrl,
    expiresIn: 3600,
})

Use @upupjs/server when you want the server package to host these routes.