springcloud2 gateway 之一:简单样例
http://www.javashuo.com/article/p-nkplpein-np.html
springcloud2 gateway 之二:转发调用eureka客户端服务
https://blog.csdn.net/haveqing/article/details/88427571
文件结构
一、GatewayConfig.java
package com.urthink.upfs.springcloudgateway.config; import com.urthink.upfs.springcloudgateway.filter.TokenFilter; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class GatewayConfig { @Bean public TokenFilter tokenFilter(){ return new TokenFilter(); } }
二、TokenFilter.java
每一个GlobalFilter都作用在每一个router上,能够满足大多数的需求。但是如果遇到业务上的定制,可能需要编写满足自己需求的GlobalFilter。在下面的案例中将讲述如何编写自己GlobalFilter,该GlobalFilter会校验请求中是否包含了请求参数“token”,如何不包含请求参数“token”则不转发路由,否则执行正常的逻辑。代码如下:
package com.urthink.upfs.springcloudgateway.filter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.cloud.gateway.filter.GatewayFilterChain; import org.springframework.cloud.gateway.filter.GlobalFilter; import org.springframework.core.Ordered; import org.springframework.http.HttpStatus; import org.springframework.web.server.ServerWebExchange; import reactor.core.publisher.Mono; /** * gateway全局过滤器 * https://blog.csdn.net/forezp/article/details/85057268 */ public class TokenFilter implements GlobalFilter, Ordered { Logger logger= LoggerFactory.getLogger( TokenFilter.class ); @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { String token = exchange.getRequest().getQueryParams().getFirst("token"); if (token == null || token.isEmpty()) { logger.info( "token is empty..." ); exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED); return exchange.getResponse().setComplete(); } return chain.filter(exchange); } @Override public int getOrder() { return -100; } }
在上面的TokenFilter需要实现GlobalFilter和Ordered接口,这和实现GatewayFilter很类似。然后根据ServerWebExchange获取ServerHttpRequest,然后根据ServerHttpRequest中是否含有参数token,如果没有则完成请求,终止转发,否则执行正常的逻辑。
三、访问
http://localhost:8080/app2/demo/test1
返回 401 Unauthorized
http://localhost:8080/app2/demo/test1?token=tokendata
正常返回数据
既然gateway已经连接到eureka,就可以通过feign调用其他服务,做更复杂的权限验证了,而不必直接连数据库。
参考:
spring cloud gateway之filter篇
https://blog.csdn.net/forezp/article/details/85057268
Spring-Cloud-Gateway之过滤器GatewayFilter
https://www.jianshu.com/p/eb3a67291050
spring cloud gateway 2 深入了解 - filter
https://www.jianshu.com/p/5e40bbc95eb9
微服务架构spring cloud - Gateway过滤器(十二)
https://blog.csdn.net/m0_37834471/article/details/82621337