encodeHeaders method

Uint8List encodeHeaders({ QpackEncoder? encoder, })

Encode the request headers as a QPACK-encoded field section.

Pseudo-headers (:method, :path, :scheme, :authority) are encoded first, followed by regular headers. The host header is promoted to :authority; all other header names are lower-cased.

encoder may be used to emit dynamic table insertions on the QPACK encoder stream. When omitted, only the static table is used.

The returned bytes are suitable for an HTTP/3 HEADERS frame payload.

Implementation

Uint8List encodeHeaders({QpackEncoder? encoder}) {
  final lines = <({String name, String value})>[
    (name: ':method', value: method),
    (name: ':path', value: path),
    (name: ':scheme', value: 'https'),
    (name: ':authority', value: headers['host'] ?? ''),
  ];
  for (final entry in headers.entries) {
    if (entry.key.toLowerCase() == 'host') continue;
    lines.add((name: entry.key.toLowerCase(), value: entry.value));
  }
  if (encoder != null) {
    return encoder.encodeLines(lines);
  }
  return QpackEncoder.encodeFieldLines(lines);
}