Upload parts

PUT each file chunk to its presigned URL from Multipart start.

PUT /api/v1/multipart/parts

cURL

curl --request PUT \
  --url 'https://PRESIGNED_URL_FROM_PARTS_ARRAY' \
  --header 'Content-Type: application/octet-stream' \
  --data-binary '@/path/to/chunk.bin'

200

HTTP/1.1 200 OK
ETag: "<string>"

cURL

curl --request PUT \
  --url 'https://PRESIGNED_URL_FROM_PARTS_ARRAY' \
  --header 'Content-Type: application/octet-stream' \
  --data-binary '@/path/to/chunk.bin'

200

HTTP/1.1 200 OK
ETag: "<string>"

Overview

Upload one part at a time as raw binary to the URL in parts[i] from Multipart start. Do not send your AutoRender API key. After all parts succeed, call Multipart complete.

Replace the --url value with each full presigned URL from the parts array (including any query parameters). The path below is for documentation tooling only—production requests go to storage, not upload.autorender.io.

Request

URL

Each element of parts in the start response (full URL, including query parameters if present).

Headers

Header	Required	Value
Content-Type	Yes	application/octet-stream

Body

Binary chunk: part_size bytes for each part except the last (may be shorter). Total bytes must equal the size you sent at start.

Split file and upload every part

If the start response is saved as start-response.json:

PART_SIZE=$(jq -r '.part_size' start-response.json)
split -b "$PART_SIZE" "./big-video.mp4" /tmp/mpart_

i=0
for chunk in /tmp/mpart_*; do
  url=$(jq -r ".parts[$i]" start-response.json)
  curl --request PUT \
    --url "$url" \
    --header "Content-Type: application/octet-stream" \
    --data-binary @"$chunk"
  i=$((i + 1))
done

Response

Storage typically returns 200 OK and may include an ETag header.

Workflow

This is step 2 of 3. Before: Multipart start. After: Multipart complete.

Body

application/octet-stream

One multipart chunk uploaded to a presigned URL

Response

200

Part stored successfully (storage may return an empty body)