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springclound zuul(服务网关)

闲云困兽 2022-03-17 阅读 110

1.添加pom相关依赖

<dependencies>
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus</artifactId>
        <version>3.5.1</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
</dependencies>

2.添加yml相关配置

server:
  port: 10000
spring:
  application:
    name: hello-zuul
eureka:
  client:
    service-url:
      defaultZone: http://admin:1234@localhost:7001/eureka/
    register-with-eureka: true
    fetch-registry: true
zuul:
  prefix: /api     #路由前缀
  routes:
    emp-provider:       # 路由名称
      path: /emp/**     #url规则
      service-id: hello-provider  #微服务名称
      strip-prefix: false   #去路由前缀
    emp-consumer:       # 路由名称
      path: /consumer/emp/**
      service-id: hello-consumer
      strip-prefix: false

3.启动类

@SpringBootApplication
@EnableEurekaClient
@EnableZuulProxy //标识zuul过滤器

4.网关过滤器类 filter

//网关过滤器
@Component
public class MyZuulFilter extends ZuulFilter {
    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE; //调用目标服务前过滤
    }

    @Override
    public int filterOrder() {
        return 0; //优先级越小优先级越高
    }

    @Override
    public boolean shouldFilter() {
        return true; //是否需要执行过滤逻辑
    }

    @Override
    public Object run() throws ZuulException {
        //判断token是否纯在
        //获取上下文
        RequestContext ctx = RequestContext.getCurrentContext();
        //获取请求对象
        HttpServletRequest request = ctx.getRequest();
        String token = request.getParameter("token");
        if(token == null){
            // 拒绝访问微服务
            ctx.setResponseStatusCode(HttpStatus.SC_UNAUTHORIZED);
            ctx.setSendZuulResponse(false);
            HttpServletResponse response = ctx.getResponse();
            Result<Object> result = Result.fail(20006, "请求未授权");
            try {
                response.setContentType("application/json;charset=utf-8");
                response.getWriter().write(JSON.toJSONString(result));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
}
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