SpringCloud_Gateway

r囧r小猫 2021-10-06 03:22 381阅读 0赞

### SpringCloud\_Gateway ###

*  依赖pom.xml
 *  配置文件bootstrap.yml
 *  配置源码

# 依赖pom.xml #

<project xmlns="http://maven.apache.org/POM/4.0.0"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>org.pingruan</groupId>
    		<artifactId>vander-framework-parent</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    	<groupId>org.pingruan.springboot</groupId>
    	<artifactId>vander-gateway-center</artifactId>
    
    	<dependencies>
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework.retry</groupId>
    			<artifactId>spring-retry</artifactId>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-redis-reactive</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-webflux</artifactId>
    		</dependency>
    		<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>
    		<dependency>
    			<groupId>org.projectlombok</groupId>
    			<artifactId>lombok</artifactId>
    		</dependency>
    	</dependencies>
    </project>

# 配置文件bootstrap.yml #

server:
      port: 9004
    spring:
      application:
        name: vander-gateway-center
        
    #------------网关配置------------------    
      cloud: 
        gateway:
          routes:
          - id: client1  # 1、ID唯一
            uri: lb://vander-client-demo   # 2、lb(注册中心名称)和ws(webservice路径)
            predicates:   # 3、规则路径匹配
            - Path=/client1/**
            filters: 
            - StripPrefix=1  # 截取1个路径   
            - name: Retry   # 重试配置（无需配置熔断）
              args:
                retries: 3 #重试次数，不包含本次（4次） 
                status: 404
                statusSeries: 500
                method: GET        
          - id: client2  # 1、ID唯一
            uri: lb://vander-client-demo-a   # 2、lb(注册中心名称)和ws(webservice路径)
            predicates:   # 3、规则路径匹配
            - Path=/client2/**
            filters:      # 4、拦截器组合
            - StripPrefix=1
            - name: Hystrix  # 远程调用熔断配置（重试配置无效）
              args: 
                name: authHystrixCommand
                fallbackUri: forward:/hystrixTimeout
            - name: Jwt  #   自定义限流配置jwt
              args:
                keyResolver: apiKeyResolver
                redis-rate-limiter.replenishRate: 10  # 用户每秒处理多少个请求
                redis-rate-limiter.burstCapacity: 20  # 用户允许在一秒钟内完成的最大请求数
    
    
    #------------注册中心配置------------------
    eureka:
      client:
        registerWithEureka: true #服务注册开关
        fetchRegistry: true #服务发现开关
        serviceUrl: #Eureka客户端与Eureka服务端进行交互的地址，多个中间用逗号分隔
          defaultZone: ${EUREKA_SERVERS:http://root:qwe123@server1:9001/eureka/}
      instance:
        prefer-ip-address: true  #将自己的ip地址注册到Eureka服务中
        ip-address: ${IP_ADDRESS:127.0.0.1}
        instance-id: ${spring.application.name}:${server.port} #指定实例id

# 配置源码 #

/**
     * 解决跨域
     * 
     * @author vander
     *
     */
    public class CorsConfiguration {
    	// 这里为支持的请求头，如果有自定义的header字段请自己添加（不知道为什么不能使用*）
    	private static final String ALLOWED_HEADERS = "*";
    	private static final String ALLOWED_METHODS = "*";
    	private static final String ALLOWED_ORIGIN = "*";
    	private static final String ALLOWED_Expose = "*";
    	private static final String MAX_AGE = "18000L";
    
    	@Bean
    	public WebFilter corsFilter() {
    		return (ServerWebExchange ctx, WebFilterChain chain) -> {
    			ServerHttpRequest request = ctx.getRequest();
    			if (CorsUtils.isCorsRequest(request)) {
    				ServerHttpResponse response = ctx.getResponse();
    				HttpHeaders headers = response.getHeaders();
    				headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN);
    				headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS);
    				headers.add("Access-Control-Max-Age", MAX_AGE);
    				headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS);
    				headers.add("Access-Control-Expose-Headers", ALLOWED_Expose);
    				headers.add("Access-Control-Allow-Credentials", "true");
    				if (request.getMethod() == HttpMethod.OPTIONS) {
    					response.setStatusCode(HttpStatus.OK);
    					return Mono.empty();
    				}
    			}
    			return chain.filter(ctx);
    		};
    	}
    
    	/**
    	 *
    	 * 如果使用了注册中心（如：Eureka），进行控制则需要增加如下配置
    	 */
    	@Bean
    	public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient) {
    		return new DiscoveryClientRouteDefinitionLocator(discoveryClient, null);
    	}
    }
    
    /**
     * 配置限流key配置
     * 
     * @author vander
     *
     */
    @Configuration
    @Slf4j
    public class GatewayConfiguration {
    	
    	/**
    	 * 接口限流操作
    	 * 
    	 * @return
    	 */
    	@Bean(name = "apiKeyResolver")
    	public KeyResolver apiKeyResolver() {
    		// 根据api接口来限流
    		log.info("接口限流操作...");
    		return exchange -> Mono.just(exchange.getRequest().getPath().value());
    
    	}
    
    	/**
    	 * ip限流操作
    	 * 
    	 * @return
    	 */
    	@Bean(name = "ipKeyResolver")
    	public KeyResolver ipKeyResolver() {
    		return exchange -> Mono.just(exchange.getRequest().getRemoteAddress().getHostName());
    	}
    
    	/**
    	 * 用户限流 使用这种方式限流，请求路径中必须携带userId参数。
    	 * 
    	 * @return
    	 */
    	@Bean(name = "userKeyResolver")
    	KeyResolver userKeyResolver() {
    		return exchange -> Mono.just(exchange.getRequest().getQueryParams().getFirst("userId"));
    	}
    
    }
    
    /**
     * 全局过滤器配置
     * 
     * @author vander
     *
     */
    @Configuration
    @Slf4j
    public class GlobalRouteFilter implements GlobalFilter{
    
    	@Override
    	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    		ServerHttpRequest.Builder builder = exchange.getRequest().mutate();
    		ServerHttpRequest serverHttpRequest = builder.build();
    		String token = serverHttpRequest.getHeaders().getFirst("token");//校验token
    		log.info("GlobalRouteFilter..."+token);
            builder.header("GlobalFilter","GlobalFilter success");
            chain.filter(exchange.mutate().request(builder.build()).build());
            return chain.filter(exchange.mutate().request(builder.build()).build());
    	}
    
    }
    
    /**
     * 
     * 局部过滤器配置
     * 
     * 请求验证
     * 1、创建过滤器，命名规则：  jwt + GatewayFilterFactory
     * 2、配置文件中配置限流 jwt
     * 
     * 
     * @author vander
     *
     */
    @Component
    @Slf4j
    public class JwtGatewayFilterFactory extends AbstractGatewayFilterFactory<Object> {
    	public GatewayFilter apply() {
            return apply(o -> {
            });
        }
    	@Override
    	public GatewayFilter apply(Object config) {
    		return (exchange,chain)->{
    			ServerHttpRequest serverHttpRequest = exchange.getRequest();
    			/**
    			 * 获取请求信息，进行验证
    			 */
    			String token = serverHttpRequest.getHeaders().getFirst("token");//获取header中token进行校验
    			log.info("请求校验..."+token);
    			return chain.filter(exchange);
    		};
    	}
    
    }
    
    /**
     * 熔断响应
     * 
     * @author vander
     *
     */
    @Slf4j
    @RestController
    public class HystrixCommandController {
    
    	@RequestMapping("/hystrixTimeout")
    	public String hystrixTimeout() {
    		log.info("hystrixTimeout...");
    		return "ok";
    	}
    	
    	@HystrixCommand(commandKey="authHystrixCommand")
    	public void authHystrixCommand() {
    		log.info("触发hystrixTimeout...");
    	}
    }
    
    /**
     * 
     * 
     * @author vander
     *
     */
    @EnableDiscoveryClient
    @SpringBootApplication
    @ComponentScan(basePackages= {"org.pingruan.gateway"})
    public class SpringBootGateway {
    
    	public static void main(String[] args) {
    		SpringApplication.run(SpringBootGateway.class, args);
    	}
    }