使用方式

final HttpClient client = HttpClient.create().addRequestFilter((request, ctx) -> {  // 仅处理Request
    System.out.println("Request Filter");
    return CompletableFuture.completedFuture(null);
}).addResponseFilter((request, response, ctx) -> {   // 仅处理Response
    System.out.println("Response Filter");
    return CompletableFuture.completedFuture(null);
}).addFilter(new DuplexFilter() {   // 同时处理Request和Response
    @Override
    public CompletableFuture<Void> doFilter(HttpRequest request, FilterContext ctx) {
        System.out.println("Request Filter(Duplex)");
        return CompletableFuture.completedFuture(null);
    }

    @Override
    public CompletableFuture<Void> doFilter(HttpRequest request, HttpResponse response, FilterContext ctx) {
        System.out.println("Response Filter(Duplex)");
        return CompletableFuture.completedFuture(null);
    }
}).build();