构建项目
provider-8001
provider-8002
gateway-9527
eureka-7001
依赖，注意不要加web依赖
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency>
application.yml
server: port: 9527 spring: application: name: gateway-9527
路由规则小案例
静态路由
配置yml方式
server: port: 9527 spring: application: name: cloud-gateway cloud: gateway: routes: - id: payment_routh #没有固定的规则但是要求唯一，建议配合服务名 uri: http://localhost:8001 #匹配后提供的路由地址 predicates: - Path=/payment/get/** #断言，路径相匹配的进行路由
此处设置的路由规则是 http://localhost:9527/payment/get/** 会路由到 http://localhost:8001/payment/get/**
而不是 http://localhost:9527/payment/get/* 路由到 http://localhost:8001/*
此处我修改上面的代码把
uri: http://localhost:8001 #匹配后提供的路由地址
修改为
uri: http://localhost:8001/abc #匹配后提供的路由地址
访问 http://localhost:9527/payment/get/1 仍然能 路由到 http://localhost:8001/payment/get/1
说明后面的/abc配置没有作用，而且官网里的小案例就是 只有 ipd地址或者 服务名称
编码方式
@Bean public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder){ RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes(); routes.route("payment_routh" , r->r.path("/payment/get/**").uri("http://localhost:8001")) .build(); return routes.build(); }
等价于
spring: application: name: cloud-gateway cloud: gateway: routes: - id: payment_routh #没有固定的规则但是要求唯一，建议配合服务名 uri: http://localhost:8001 #匹配后提供的路由地址 predicates: - Path=/payment/get/** #断言，路径相匹配的进行路由
动态路由
以Eureka为注册中心为例
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency>
修改启动类
@EnableEurekaClient
修改yml配置文件
server: port: 9527 spring: application: name: cloud-gateway cloud: gateway: discovery: locator: enabled: true #开启注册中心路由功能 routes: - id: payment_routh #没有固定的规则但是要求唯一，建议配合服务名 uri: lb://CLOUD-PROVIDER-PAYMENT #此处如果有问题，请注意依赖spring-cloud-starter-netflix-eureka-client依赖不能错 #uri: http://localhost:8001 #匹配后提供的路由地址 predicates: - Path=/payment/get/** #断言，路径相匹配的进行路由
Route Predicate路由断言
就是下图中的箭头处下面的规则
下面是官网提供的配置规则
Spring Cloud Gateway
GateWay的Filter
官网地址
Spring Cloud Gateway
Spring Cloud Gateway
下面是复制官网上的一段代码，添加请求头 key=X-request-red,value=biue
spring: cloud: gateway: routes: - id: add_request_header_route uri: https://example.org filters: - AddRequestHeader=X-Request-red, blue
自定义过滤器
@Component @Slf4j public class MyLogGateWayFilter implements GlobalFilter, Ordered { @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { log.info("***********come in MyLogGateWayFilter: "+new Date()); String uname = exchange.getRequest().getQueryParams().getFirst("uname");//每次进来后判断带不带uname这个key if(uname == null){ log.info("*********用户名为null ，非法用户，o(╥﹏╥)o"); exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE); //uname为null非法用户 return exchange.getResponse().setComplete(); } return chain.filter(exchange); } @Override public int getOrder() { return 0; } }
