S3 POST Policy signature fields; send unchanged as form-data during direct upload
| Name | Type | Description | Notes |
|---|---|---|---|
| key | str | Plaintext temporary object path, identical to base64_decode(file_key) | |
| content_type | str | Must match the decoded content_type from the pre-upload request | |
| x_amz_credential | str | AWS temporary credential and scope; submit them unchanged during direct upload | |
| x_amz_algorithm | str | AWS signing algorithm; submit it unchanged during direct upload | |
| x_amz_date | str | AWS signing timestamp; submit it unchanged during direct upload | |
| policy | str | Base64-encoded S3 POST Policy; submit it unchanged during direct upload | |
| x_amz_signature | str | S3 POST Policy signature; submit it unchanged during direct upload |