目录
基础使用
Maven依赖
注意：不能引入 spring-cloud-starter-web，会出现错误
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>2.0.0.RELEASE</version>
</dependency>
</dependencies>
application配置
server:
port: 80
####服务网关名称
spring:
application:
name: mayikt-gateway
cloud:
gateway:
###路由策略
routes:
###路由id
- id: mayikt
####转发http://www.mayikt.com/
uri: http://www.mayikt.com/
###匹配规则
predicates:
- Path=/mayikt/**
###浏览器请求127.0.0.1/mayikt会转发到http://www.mayikt.com/
浏览器输入127.0.0.1/mayikt会转发到http://www.mayikt.com/
Gateway整合Nacos实现服务转发
Maven依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>2.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<version>0.2.2.RELEASE</version>
</dependency>
</dependencies>
application配置
server:
port: 80
####服务网关名称
spring:
application:
name: mayikt-gateway
cloud:
gateway:
discovery:
locator:
####开启以服务id去注册中心上获取转发地址
enabled: true
###路由策略
routes:
###路由id
- id: mayikt
####转发http://www.mayikt.com/
uri: http://www.mayikt.com/
###匹配规则
predicates:
- Path=/mayikt/**
###路由id
- id: member
#### 基于lb负载均衡形式转发，mayikt-member为nacos中的会员服务名称
uri: lb://mayikt-member
filters:
- StripPrefix=1
###匹配规则
predicates:
- Path=/member/**
nacos:
discovery:
server-addr: 127.0.0.1:8848
### nacos注册中心地址
自定义TokenFilter实现参数拦截
案例：拦截所求请求，如果请求参数不包含token则返回500响应码
@Component
public class TokenFilter implements GlobalFilter {
// 拦截所求请求，如果请求参数不包含token则返回500响应码
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
String token = exchange.getRequest().getQueryParams().getFirst("token");
if (token == null || token.isEmpty()) {
// 封装响应内容
ServerHttpResponse response = exchange.getResponse();
response.setStatusCode(HttpStatus.BAD_REQUEST);
String msg = "token not is null ";
DataBuffer buffer = response.bufferFactory().wrap(msg.getBytes());
return response.writeWith(Mono.just(buffer));
}
// 使用网关过滤
return chain.filter(exchange); // 放行
}
}