Spring Cloud Gateway

路由谓词工厂 Route Predicate Factory

1. The After Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: after_route
        uri: https://example.org
        predicates:
        - After=2017-01-20T17:42:47.789-07:00[America/Denver]
 
# 用日期时间匹配

2. The Before Route Predicate Factory

spring:
  cloud:
    gateway:
      routes:
      - id: before_route
        uri: https://example.org
        predicates:
        - Before=2017-01-20T17:42:47.789-07:00[America/Denver]
 
# 用日期时间匹配

3. The Between Route Predicate Factory

spring:
  cloud:
    gateway:
      routes:
      - id: between_route
        uri: https://example.org
        predicates:
        - Between=2017-01-20T17:42:47.789-07:00[America/Denver], 2017-01-21T17:42:47.789-07:00[America/Denver]
 
# 用日期时间匹配

4. The Cookie Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: cookie_route
        uri: https://example.org
        predicates:
        - Cookie=chocolate, ch.p
 
# 用 cookie 名称和值匹配

5. The Header Route Predicate Factory       

spring:
  cloud:
    gateway:
      routes:
      - id: header_route
        uri: https://example.org
        predicates:
        - Header=X-Request-Id, \d+
 
# 用 header 名称和值匹配

6. The Host Route Predicate Factory      

spring:
  cloud:
    gateway:
      routes:
      - id: host_route
        uri: https://example.org
        predicates:
        - Host=**.somehost.org,**.anotherhost.org
 
# 用 Host header 的值匹配

7. The Method Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: method_route
        uri: https://example.org
        predicates:
        - Method=GET,POST
 
# 用请求方法的类型匹配

8. The Path Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: path_route
        uri: https://example.org
        predicates:
        - Path=/red/{segment},/blue/{segment}
 
# 用请求路径的值匹配

9. The Query Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: query_route
        uri: https://example.org
        predicates:
        - Query=green
 
# 用查询参数的名称和值（值可以省略）匹配

10. The RemoteAddr Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: remoteaddr_route
        uri: https://example.org
        predicates:
        - RemoteAddr=192.168.1.1/24
 
# 用 RemoteAddr（CIDR格式，如：192.168.1.1/24） header 的值匹配

11. The Weight Route Predicate Factory        

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
 
# 用分组名称和权重匹配

12. The XForwarded Remote Addr Route Predicate Factory        

spring:
  cloud:
    gateway:
      routes:
      - id: xforwarded_remoteaddr_route
        uri: https://example.org
        predicates:
        - XForwardedRemoteAddr=192.168.1.1/24
 
# 用 X-Forwarded-For（CIDR格式，如：192.168.1.1/24） header 值匹配

13. 自定义路由谓词工厂：继承自 AbstractRoutePredicateFactory

https://blog.csdn.net/abu935009066/article/details/112260405

网关过滤器工厂 GatewayFilter Factories

包括这些过滤器：

添加请求头、添加请求参数、添加响应头、断路器、缓存请求体、去重响应头、回退头、JSON转gRPC、本地响应缓存、映射请求头、修改请求体、修改响应体、前缀路径、保留主机头、重定向、移除JSON属性响应体、移除请求头、移除请求参数、移除响应头、请求头大小、请求速率限制器、重写位置响应头、重写路径、重写响应头、保存会话、安全头、设置路径、设置请求头、设置响应头、设置状态、去除前缀、重试、请求大小、设置请求主机头、令牌中继等过滤器和默认过滤器。

https://docs.spring.io/spring-cloud-gateway/docs/current/reference/html/#gatewayfilter-factories

路由谓词和过滤器在 yml 中的两种配置方式

Shortcut annotation，简洁型写法：

spring:
  cloud:
    gateway:
      routes:
      - id: cookie_route
        uri: https://example.org
        predicates:
        - Cookie=chocolate, ch.p    

Fully expanded arguments，复杂型写法（这种方式需要详细写出每一项）：

spring:
  cloud:
    gateway:
      routes:
      - id: cookie_route
        uri: https://example.org
        predicates:
        - name: Cookie
           args: 
              name: chocolate
              regexp: ch.p