Function createNativeDownloadAuthorizationUrl

createNativeDownloadAuthorizationUrl(
    downloadUrl: string,
    bucketName: string,
    fileName: string,
    authorizationToken: string,
    validDurationInSeconds?: number,
): string
Constructs a B2-native download URL using a token from b2_get_download_authorization. This is not an S3 presigned URL.

The token lifetime is fixed when b2_get_download_authorization creates the token. validDurationInSeconds is retained only for compatibility with the legacy presignGetObjectUrl helper's decorative expires query parameter; changing it here does not shorten or extend access. Because the returned URL carries a bearer token, downloadUrl must be an HTTPS Backblaze download origin without userinfo, path, query, or fragment.
Parameters
- downloadUrl: string
  The B2 download URL from authorization (e.g., https://f004.backblazeb2.com).
- bucketName: string
  The bucket containing the file.
- fileName: string
  The file name (path) to download.
- authorizationToken: string
  A download authorization token from b2_get_download_authorization.
- validDurationInSeconds: number = DEFAULT_NATIVE_DOWNLOAD_URL_EXPIRES_IN
  Compatibility-only value for the non-authoritative expires query.
Returns string
The B2 native download-authorization URL string, not an S3 presigned URL.
- Defined in s3/index.ts:480