1.网关功能

springCloud中网管有两种

gateway
zuul

2.编写路由配置及nacos地址

路由断言工厂

过滤器工厂

全局过滤器

//@Order()
@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取请求参数
        ServerHttpRequest request = exchange.getRequest();
        //2.获取参数中的 authorization参数
        MultiValueMap<String, String> params = request.getQueryParams();
        //3.判断参数值是否等于admin
        if ("admin".equals(params.getFirst("authorization"))){
            //4.是，放行
            return chain.filter(exchange);
        }
        //5.否，拦截
        //5.1设置状态码
        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        //5.2拦截请求
        return exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
        return -1;
    }
}