Spring Cloud全解析：网关之GateWay断言

GateWay断言

断言Predicate

gateWay网关中提供了多种断言方式

After断言

Loaded RoutePredicateFactory [After]

After匹配在当前日期时间之后发生的请求

spring:
  cloud:
    gateway:
      routes:
      - id: after_route
        uri: https://example.org
        predicates:
        - After=2021-09-06T16:02:25.738+08:00[Asia/Shanghai]

Before断言

Loaded RoutePredicateFactory [Before]

Before匹配在当前日期时间之前发生的请求

spring:
  cloud:
    gateway:
      routes:
      - id: before_route
        uri: https://example.org
        predicates:
        - Before=2021-09-06T16:02:25.738+08:00[Asia/Shanghai]

Between断言

Loaded RoutePredicateFactory [Between]

Between匹配在两个日期之间发生的请求

spring:
  cloud:
    gateway:
      routes:
      - id: between_route
        uri: https://example.org
        predicates:
        - Between=2021-09-06T16:02:25.738+08:00[Asia/Shanghai], 2021-09-07T16:02:25.738+08:00[Asia/Shanghai]

Cookie断言

Loaded RoutePredicateFactory [Cookie]

Cookie会根据cookie的name以及值的正则表达式进行匹配

spring:
  cloud:
    gateway:
      routes:
      - id: cookie_route
        uri: https://example.org
        predicates:
        - Cookie=userName, zhangsan  # userName为Cookie的name，zhangsan为cookie的值的正则表达式

Header断言

Loaded RoutePredicateFactory [Header]

Header是匹配请求头的name以及值的正则表达式进行匹配

spring:
  cloud:
    gateway:
      routes:
      - id: header_route
        uri: https://example.org
        predicates:
        - Header=X-Request-Id, \d+  #X-Request-Id是请求头的name，\d+为请求头所对应的值的正则表达式

Host断言

Loaded RoutePredicateFactory [Host]

Host进行域名匹配，Ant模式匹配

spring:
  cloud:
    gateway:
      routes:
      - id: host_route
        uri: https://example.org
        predicates:
        - Host=**.somehost.org,**.anotherhost.org

Method断言

Loaded RoutePredicateFactory [Method]

Method 匹配HTTP方法

spring:
  cloud:
    gateway:
      routes:
      - id: method_route
        uri: https://example.org
        predicates:
        - Method=GET,POST

Path断言

Loaded RoutePredicateFactory [Path]

Path 进行路径匹配

spring:
  cloud:
    gateway:
      routes:
      - id: host_route
        uri: https://example.org
        predicates:
        - Path=/foo/{segment},/bar/{segment}

Query断言

Loaded RoutePredicateFactory [Query]

Query 查询参数匹配

spring:
  cloud:
    gateway:
      routes:
      - id: query_route
        uri: https://example.org
        predicates:
        - Query=foo, ba.  #如果查询参数为foo并且其值符合ba.正则表达式

ReadBodyPredicateFactory断言

Loaded RoutePredicateFactory [ReadBodyPredicateFactory]

RemoteAddr断言

Loaded RoutePredicateFactory [RemoteAddr]

RemoteAddr 远程地址匹配

spring:
  cloud:
    gateway:
      routes:
      - id: remoteaddr_route
        uri: https://example.org
        predicates:
        - RemoteAddr=192.168.1.1/24

Weight断言

Loaded RoutePredicateFactory [Weight]

Weight 权重匹配，接收group和weight两个参数，权重是按照组进行计算的

spring:
  cloud:
    gateway:
      routes:
      - id: weight_high
        uri: https://weighthigh.org
        predicates:
        - Weight=group1, 8
      - id: weight_low
        uri: https://weightlow.org
        predicates:
        - Weight=group1, 2     #group1是组名， 会有80%的请求访问 https://weighthigh.org，20%的请求访问https://weightlow.org

CloudFoundryRouteService断言

Loaded RoutePredicateFactory [CloudFoundryRouteService]

配置方式

gateway配置断言有两种方式

以Cookie断言为例，Cookie断言的配置类如下

public static class Config {

   @NotEmpty
   private String name;

   @NotEmpty
   private String regexp;

   public String getName() {
      return name;
   }

   public Config setName(String name) {
      this.name = name;
      return this;
   }

   public String getRegexp() {
      return regexp;
   }

   public Config setRegexp(String regexp) {
      this.regexp = regexp;
      return this;
   }

}

• 简短配置

  断言名称和参数之间是=，多个参数之间,相隔，按照定义的顺序依次赋值

  spring:
    cloud:
      gateway:
        routes:
        - id: after_route
          uri: https://example.org
          predicates:
          - Cookie=mycookie,mycookievalue
  

• 全面扩展参数

  每个参数都使用 字段名:字段值 表示

  spring:
    cloud:
      gateway:
        routes:
        - id: after_route
          uri: https://example.org
          predicates:
          - name: Cookie
            args:
              name: mycookie
              regexp: mycookievalue
  

https://zhhll.icu/2021/框架/微服务/springcloud/网关/GateWay/2.GateWay断言/