Request presigned URLs for a contiguous range of parts. Upload each part with PUT to the matching URL, then pass the ETag headers (in order) to Complete Multipart.

Walkthrough: VOD Upload - Multipart. Previous step: Initiate.

Rules

• Each part must be at least 5 MB, except the last part (which may be smaller).
• At most 100 part signatures per call. Request another from_part_number / to_part_number range if the file needs more parts.
• PUT to the returned URLs as-is. The host comes from the API (for example *.wasabisys.com); do not hardcode a storage host.

ETags

After each successful PUT, read the ETag response header and keep it for ordered_etags on complete. If storage returned quotes around the value, keep the quotes in the array you send later.

Request body

Example

curl -X POST "https://developer.dacast.com/v2/vod/upload/signatures/multipart" \
  -H "X-Api-Key: insertYourApiKeyHere" \
  -H "X-Format: default" \
  -H "Content-Type: application/json" \
  -d "{\"from_part_number\":1,\"to_part_number\":3,\"s3_path\":\"s3://…\",\"uploader_id\":\"…\"}"

Response (200)

{
  "presigned_urls": [
    "https://…/source.mp4?…&partNumber=1&uploadId=…&…",
    "https://…/source.mp4?…&partNumber=2&uploadId=…&…",
    "https://…/source.mp4?…&partNumber=3&uploadId=…&…"
  ]
}

presigned_urls is an array of URL strings in part order (index 0 → part 1).

Upload one part

curl -i -X PUT --data-binary @part_1.bin "https://presigned-url-for-part-1"

Expect a successful storage response and an ETag header.