Function wrapEnvelope

src/connect.js:34–46

(protoBuf, { compress = true } = {})

 * Wrap protobuf bytes in a Connect-RPC envelope frame.
 */
export function wrapEnvelope(protoBuf, { compress = true } = {}) {
  let payload = protoBuf;
  let flags = 0;
  if (compress && payload.length > 0) {
    payload = gzipSync(payload);
    flags |= 0x01;
  }
  const frame = Buffer.alloc(5 + payload.length);
  frame[0] = flags;
  frame.writeUInt32BE(payload.length, 1);
  payload.copy(frame, 5);
  return frame;
}

/**
 * Wrap a request for sending (single envelope, gzipped).