Integration examples

umask 077
touch result.json content.headers && chmod 600 result.json content.headers || exit 1
[[ "$BASE_URL" =~ ^https://[A-Za-z0-9.-]+(:[0-9]{1,5})?$ &&
  -n "$API_KEY" && -r request.json ]] || {
  printf 'Set HTTPS BASE_URL, API_KEY and request.json\n' >&2
  exit 1
}
OUTPUT_FILE=${VIDEO_OUTPUT:-seedance.mp4}
if [[ -f task-id.txt ]]; then
  TASK_ID=$(< task-id.txt)
else
  (
    set -C
    printf 'creating\n' > task-id.txt
  ) || {
    printf 'State file already exists; inspect it before another POST\n' >&2
    exit 1
  }
  if curl --fail --silent --show-error --max-time 120 \
    "$BASE_URL/v1/videos" \
    -H "Authorization: Bearer $API_KEY" \
    -H 'Content-Type: application/json' \
    --data-binary @request.json \
    -o created.json; then
    TASK_ID=$(jq -er '
      .id | select(type == "string" and length > 0)
    ' created.json) || exit 1
    printf '%s\n' "$TASK_ID" > task-id.txt
  else
    printf 'Outcome unknown; check console before another POST\n' >&2
    exit 1
  fi
fi
[[ "$TASK_ID" != creating && "$TASK_ID" =~ ^[A-Za-z0-9_-]+$ ]] || {
  printf 'Invalid task ID\n' >&2
  exit 1
}
deadline=$((SECONDS + 2700))
completed=0
while ((SECONDS < deadline)); do
  if ! http_status=$(curl --silent --show-error --max-time 60 \
    --write-out '%{http_code}' \
    "$BASE_URL/v1/videos/$TASK_ID" \
    -H "Authorization: Bearer $API_KEY" \
    -o result.json); then
    sleep 30
    continue
  fi
  case "$http_status" in
    200) ;;
    429 | 5??)
      sleep 30
      continue
      ;;
    *)
      printf 'Status HTTP %s; ID preserved\n' "$http_status" >&2
      exit 1
      ;;
  esac
  jq '{id, status, error}' result.json
  status=$(jq -r '.status' result.json)
  case "$status" in
    completed)
      completed=1
      break
      ;;
    failed)
      printf 'Terminal status: %s\n' "$status" >&2
      exit 1
      ;;
    queued | in_progress) sleep 15 ;;
    *)
      printf 'Unknown status: %s\n' "$status" >&2
      exit 1
      ;;
  esac
done
if ((!completed)); then
  printf 'Polling limit reached; resume with %s\n' "$TASK_ID" >&2
  exit 1
fi
VIDEO_URL=$(jq -r '.content.video_url // empty' result.json)
if [[ -z "$VIDEO_URL" ]]; then
  metadata=$(curl --silent --show-error --max-time 300 \
    --dump-header content.headers --write-out '%{http_code} %{content_type}' \
    "$BASE_URL/v1/videos/$TASK_ID/content" \
    -H "Authorization: Bearer $API_KEY" -o seedance.download) || exit 1
  http_status=${metadata%% *}
  if [[ "$http_status" == 307 ]]; then
    VIDEO_URL=$(awk 'tolower($1)=="location:" {print $2}' content.headers | tr -d '\r' | tail -1)
  elif [[ "$http_status" == 200 ]]; then
    mime=${metadata#* }
    case "$mime" in
      video/mp4* | video/quicktime* | application/octet-stream*)
        mv seedance.download "$OUTPUT_FILE"
        exit 0
        ;;
    esac
  fi
  [[ "$http_status" == 307 ]] || {
    printf 'Content HTTP %s; ID preserved\n' "$http_status" >&2
    exit 1
  }
fi
[[ "$VIDEO_URL" =~ ^https://[^/@?#]+ ]] \
  && [[ ! "$VIDEO_URL" =~ ^https://[^/?#]*@ ]] || {
  printf 'Invalid signed HTTPS media URL\n' >&2
  exit 1
}
# The signed URL grants temporary access. Never send the API Bearer to it.
metadata=$(curl --silent --show-error --max-time 300 \
  --write-out '%{http_code} %{content_type}' \
  "$VIDEO_URL" -o seedance.download) || exit 1
http_status=${metadata%% *}
mime=${metadata#* }
case "$http_status:$mime" in
  2??:video/mp4* | 2??:video/quicktime* | 2??:application/octet-stream*)
    mv seedance.download "$OUTPUT_FILE"
    ;;
  *)
    printf 'Unexpected HTTP response or file type\n' >&2
    exit 1
    ;;
esac