Function readEnvelopeText

src/video-proxy-shared.ts:186–197

(
  res: Response,
  record: RecordConfig | undefined,
)

 * fallback) without retaining anything oversized in memory.
 */
export async function readEnvelopeText(
  res: Response,
  record: RecordConfig | undefined,
): Promise<string> {
  const read = await readBodyIdle(res, record, VIDEO_PROXY_ENVELOPE_BODY_CAP);
  if (read.overCap) {
    throw new Error(
      `Upstream envelope body exceeded ${VIDEO_PROXY_ENVELOPE_BODY_CAP} bytes (read aborted at ${read.bytesRead})`,
    );
  }
  return read.buf.toString("utf8");
}