@UnstableApi
    public ServerBuilder absoluteUriTransformer(Function<? super String, String> absoluteUriTransformer) {
        this.absoluteUriTransformer = requireNonNull(absoluteUriTransformer, "absoluteUriTransformer");
        return this;
    }
Sets the {@link Function} that transforms the absolute URI in an HTTP/1 request line
into an absolute path. Use this property when you have to handle a client that sends
such an HTTP/1 request, because Armeria always assumes that request path is an absolute path and
return a {@code 400 Bad Request} response otherwise. For example:
<pre>{@code
builder.absoluteUriTransformer(absoluteUri -> {
  // https://foo.com/bar -> /bar
  return absoluteUri.replaceFirst("^https://\\.foo\\.com/", "/");
  // or..
  // return "/proxy?uri=" + URLEncoder.encode(absoluteUri);
});
}</pre>
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java