8.Gateway

1.创建工程
1.1 加入依赖

    org.springframework.cloud
    spring-cloud-starter


    org.springframework.boot
    spring-boot-starter-webflux


    org.springframework.cloud
    spring-cloud-starter-gateway


    org.springframework.cloud
    spring-cloud-starter-netflix-hystrix


    org.springframework.boot
    spring-boot-starter-data-redis


    org.springframework.boot
    spring-boot-starter-security


    javax.servlet
    javax.servlet-api
    3.1.0
    provided


    mysql
    mysql-connector-java
    5.1.43


    com.alibaba
    druid-spring-boot-starter
    1.1.9


    p6spy
    p6spy
    3.6.0



    org.mybatis.spring.boot
    mybatis-spring-boot-starter
    1.3.1


    tk.mybatis
    mapper-spring-boot-starter
    1.2.4


    org.apache.commons
    commons-lang3
    3.7


    org.apache.commons
    commons-collections4
    4.1


    commons-io
    commons-io
    2.5


    com.alibaba
    fastjson
    1.2.4


    org.aspectj
    aspectjrt
    1.8.13

2.代码
2.1 配置RouteLocatorBuilder

@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
    //@formatter:off
    return builder.routes()
            .route("path_route", r -> r.path("/get")
                    .uri("http://httpbin.org"))
            .route("testfilter", r -> r.path("/testfilter/**").filters(f -> f.prefixPath("").filter(new GatewayCheckFilter()))
                    .uri("lb://service-a/test"))
            .route("path_getConf", r -> r.path("/getConf")
                    .uri("lb://service-a/getConf"))
            .route("path_actuator", r -> r.path("/actuator")
                    .uri("lb://service-a/actuator"))
            .route("host_route", r -> r.host("*.myhost.org")
                    .uri("http://httpbin.org"))
            .route("rewrite_route", r -> r.host("*.rewrite.org")
                    .filters(f -> f.rewritePath("/foo/(?.*)",
                            "/${segment}"))
                    .uri("http://httpbin.org"))
            .route("hystrix_route", r -> r.host("*.hystrix.org")
                    .filters(f -> f.hystrix(c -> c.setName("slowcmd")))
                    .uri("http://httpbin.org"))
            .route("hystrix_fallback_route", r -> r.host("*.hystrixfallback.org")
                    .filters(f -> f.hystrix(c -> c.setName("slowcmd").setFallbackUri("forward:/hystrixfallback")))
                    .uri("http://httpbin.org"))
            .route("limit_route", r -> r
                    .host("*.limited.org").and().path("/anything/**")
                    .filters(f -> f.requestRateLimiter(c -> c.setRateLimiter(redisRateLimiter())))
                    .uri("http://httpbin.org"))
            .route("websocket_route", r -> r.path("/echo")
                    .uri("ws://localhost:9000"))
            .build();
}

2.2 根据需要配置
GatewayFilter和GlobalFilter

@Override
public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    ServerHttpRequest request = exchange.getRequest();
    //获取path
    RequestPath allPath = request.getPath();
    String path = allPath.pathWithinApplication().value();
    //不拦截资源文件
    for (String url : excludedUrls) {
        if (path.contains(url)) {
            return chain.filter(exchange);
        }
    }
    staffService = exchange.getApplicationContext().getBean(StaffService.class);

    //获取参数
    String userName = request.getQueryParams().getFirst("userName");
    String pwd = request.getQueryParams().getFirst("pwd");

    //获取response
    ServerHttpResponse response = exchange.getResponse();
    response.setStatusCode(HttpStatus.OK);
    //设置headers
    HttpHeaders httpHeaders = response.getHeaders();
    httpHeaders.add("Content-Type", "application/json; charset=UTF-8");
    httpHeaders.add("X-Content-Type-Options", "");

    if (!"abc".equals(userName) || !"123".equals(pwd)) {
        DataBuffer bodyDataBuffer = response.bufferFactory().wrap("gateway wrong".getBytes());
        return response.writeWith(Mono.just(bodyDataBuffer));
    }
    return chain.filter(exchange);
}

3.配置文件

spring:
  application:
    name: gateway
# 过滤器/转发配置 begin--------------------------------------
  cloud:
    gateway:
      default-filters:
      routes:
      #------------------------------------------------------------------------
      - id: modulea
        uri: lb://service-a
        predicates:
        - Path= /ma/**
        filters: # 调用目标工程时 省略ma路径 根据项目需要配置
        - StripPrefix= 1
      #------------------------------------------------------------------------
      - id: moduleb
        uri: lb://service-b
        predicates:
        - Path= /mb/**
        filters:
        - StripPrefix= 1