@Nullable
    static StreamEncoderFactory getEncoderFactory(RequestHeaders headers) {
        final String acceptEncoding = headers.get(HttpHeaderNames.ACCEPT_ENCODING);
        if (acceptEncoding == null) {
            return null;
        }
        return determineEncoder(acceptEncoding);
    }
Support utilities for dealing with HTTP encoding (e.g., gzip).
core/src/main/java/com/linecorp/armeria/server/encoding/HttpEncoders.java