spring cloud gateway 某些路由中跳过全局过滤器

拼搏现实的明天。 2023-07-08 02:57 6阅读 0赞

在Spring Cloud Gateway中GlobalFilter可以方便的全局拦截或统计，有时候希望在某些路由中可以跳过GlobalFilter，可以通过GatewayFilter与GlobalFilter组合来实现。

### 1. 新建项目 ###

新建一个 Spring Cloud Gateway的项目，添加对应的依赖

### 2. GlobalFilter ###

[https://www.jianshu.com/p/42455cdc6d25][https_www.jianshu.com_p_42455cdc6d25]

@Component
    public class TestGlobalFilter implements GlobalFilter, Ordered {
        public final static String ATTRIBUTE_IGNORE_TEST_GLOBAL_FILTER = "@ignoreTestGlobalFilter";
    
        @Override
        public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
            //跳过检测
            if (exchange.getAttribute(ATTRIBUTE_IGNORE_TEST_GLOBAL_FILTER) != null) {
                return chain.filter(exchange);
            } else {
                //简单增加一个参数
                URI uri = exchange.getRequest().getURI();
                String query = uri.getRawQuery();
                if (StringUtils.hasText(query)) {
                    query = query + "&throwFilter=true";
                } else {
                    query = query + "?throwFilter=true";
                }
    
                URI newUri = UriComponentsBuilder.fromUri(uri)
                        .replaceQuery(query)
                        .build(true)
                        .toUri();
    
                ServerHttpRequest request = exchange.getRequest().mutate().uri(newUri).build();
    
                return chain.filter(exchange.mutate().request(request).build());
            }
        }
    
        @Override
        public int getOrder() {
            //在GatewayFilter之后执行
            return 10;
        }
    }

## ##

### 3. GatewayFilter ###

@Component
    public class IgnoreTestGlobalFilterFactor extends AbstractGatewayFilterFactory<IgnoreTestGlobalFilterFactor.Config> {
    
        public IgnoreTestGlobalFilterFactor() {
            super(Config.class);
        }
    
        @Override
        public GatewayFilter apply(Config config) {
            return this::filter;
        }
    
        public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
            exchange.getAttributes().put(TestGlobalFilter.ATTRIBUTE_IGNORE_TEST_GLOBAL_FILTER, true);
            return chain.filter(exchange);
        }
    
        public static class Config {
    
        }
    
        @Override
        public String name() {
            return "IgnoreTestGlobalFilter";
        }
    }

### 4. 配置路由 ###

spring:
      cloud:
        gateway:
          routes:
          - id: gloabl_filter
            uri: http://localhost:4101
            predicates:
            - Path=/filter/**
            filters:
            - StripPrefix=1
          - id: no_filter
            uri: http://localhost:4101
            predicates:
            - Path=/no-filter/**
            filters:
            - StripPrefix=1
            - IgnoreTestGlobalFilter  #在本路由启用跳过全局过滤器

### 5. 效果 ###

![format_png][]

有过滤器

![format_png 1][]

无过滤器

作者：giafei  
链接：https://www.jianshu.com/p/42455cdc6d25  
来源：简书  
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

[https_www.jianshu.com_p_42455cdc6d25]: https://www.jianshu.com/p/42455cdc6d25
[format_png]: https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xMzI0NjU3My00N2ZiOTY5NGQwZTA1ZTBjLnBuZz9pbWFnZU1vZ3IyL2F1dG8tb3JpZW50L3N0cmlwfGltYWdlVmlldzIvMi93LzQ4OS9mb3JtYXQvd2VicA?x-oss-process=image/format,png
[format_png 1]: https://imgconvert.csdnimg.cn/aHR0cHM6Ly91cGxvYWQtaW1hZ2VzLmppYW5zaHUuaW8vdXBsb2FkX2ltYWdlcy8xMzI0NjU3My01MWMxM2FkZGU2NDU0MTcwLnBuZz9pbWFnZU1vZ3IyL2F1dG8tb3JpZW50L3N0cmlwfGltYWdlVmlldzIvMi93LzQ4OS9mb3JtYXQvd2VicA?x-oss-process=image/format,png