243.10. 实现反向代理

from("netty-http:proxy://0.0.0.0:8080")
    .toD("netty-http:"
        + "${headers." + Exchange.HTTP_SCHEME + "}://"
        + "${headers." + Exchange.HTTP_HOST + "}:"
        + "${headers." + Exchange.HTTP_PORT + "}")
    .process(this::processResponse);

void processResponse(final Exchange exchange) {
    final NettyHttpMessage message = exchange.getIn(NettyHttpMessage.class);
    final FullHttpResponse response = message.getHttpResponse();

    final ByteBuf buf = response.content();
    final String string = buf.toString(StandardCharsets.UTF_8);

    buf.resetWriterIndex();
    ByteBufUtil.writeUtf8(buf, string.toUpperCase(Locale.US));
}