ServerWebExchange header设置

@Order(1000)
public class HeaderFilter implements GlobalFilter{

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        Object routeValue = exchange.getAttribute("route");
        ServerHttpRequest request = exchange.getRequest().mutate().header(route, (String) routeValue).build();
        return chain.filter(exchange.mutate().request(request).build());
    }
}