Unified gateway

Gateway

effect

Quick start

New module gateway, Add dependency

<dependencies>
        <!--nacos Service registration found dependencies -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- gateway gateway rely on -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
    </dependencies>

Create startup class

@SpringBootApplication
public class GatewayApplication {
    
    public static void main(String[] args) {
    
        SpringApplication.run(GatewayApplication.class, args);
    }
}

PS：lb Namely loadBalance（ Load balancing ） Abbreviation
Modify the configuration

server:
  port: 10010
logging:
  level:
    cn.itcast: debug
  pattern:
    dateformat: MM-dd HH:mm:ss:SSS
spring:
  application:
    name: gateway
  cloud:
    nacos:
      server-addr: nacos:8848 # nacos Address 
    gateway:
      routes:
        - id: user-service #  Route marking , Must be unique 
          uri: lb://userservice #  The destination address of the route 
          predicates: #  Route assertion , Determine whether the request meets the rules 
            - Path=/user/** #  Path assertion , Determine whether the path is based on /user start , If yes, it meets 
		- id: order-service
          uri: lb://orderservice
          predicates:
            - Path=/order/**

function gateway modular

Route assertion factory

Filter configuration for routing

modify usercontroller file

Global filter

stay gateway Create a new class under the package AuthorizeFilter

// @Order(-1)
@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {
    
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    
        // 1. Get request parameters 
        ServerHttpRequest request = exchange.getRequest();
        MultiValueMap<String, String> params = request.getQueryParams();
        // 2. Get... In the parameter  authorization  Parameters 
        String auth = params.getFirst("authorization");
        // 3. Judge whether the parameter value is equal to  admin
        if ("admin".equals(auth)) {
    
            // 4. yes , release 
            return chain.filter(exchange);
        }
        // 5. no , Intercept 
        // 5.1. Set status code 
        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        // 5.2. Intercept request 
        return exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
    
        return -1;
    }
}

Enter url localhost:10010/user/1?authorization=admin You can enter the page

Filter chain connection sequence

The gateway cors Cross domain configuration