SpringGateway

# Read First

https://www.cnblogs.com/crazymakercircle/p/11704077.html#autoid-h3-11-1-0

https://docs.spring.io/spring-cloud-gateway/docs/current/reference/html/#configuration-properties

# 跨域

spring:
  cloud:
    gateway:
      filter:
        remove-hop-by-hop: # 在调用目标服务的时候，移除配置的 header 信息。
          headers:
            - access-control-allow-credentials
            - access-control-allow-headers
            - access-control-allow-methods
            - access-control-allow-origin
            - access-control-max-age
      globalcors: # 跨域问题解决
        add-to-simple-url-handler-mapping: true
        cors-configurations:
          '[/**]':
            allowCredentials: true
            allowedOriginPatterns: "*"
            allowedHeaders: "*"
            allowedMethods: "*"
            maxAge: 3628800

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https://blog.csdn.net/kwame211/article/details/107514290

测试跨域方式

// 在谷歌浏览器的 console 窗口下
var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://127.0.0.1:7757/test/app');
xhr.send(null);
xhr.onload = function(e) {
    var xhr = e.target;
    console.log(xhr.responseText);
}

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# Route

优先级

使用 order 配置项，order代表的优先级是从小往大排序的，即数值越小，优先级越高。

RoutePredicateHandlerMapping
DiscoveryClientRouteDefinitionLocator
RouteDefinitionLocator # 获取具体路由信息
RoutePredicateHandlerMapping =》RouteLocator=》RouteDefinitionLocator

PathRoutePredicateFactory

AbstractErrorWebExceptionHandler 异常情况

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路由定义定位器 RouteDefinitionLocator (opens new window)

路由定位器 RouteLocator (opens new window)

路由谓词工厂 RoutePredicateFactory (opens new window)

路由谓词工厂WeightRoutePredicateFactory (opens new window)

网关过滤器 GatewayFilter (opens new window)

网关过滤器工厂 GatewayFilterFactory (opens new window)

全局过滤器GlobalFilter (opens new window)

# Filter

核心处理类

FilteringWebHandler 为 Filter 执行处理类，关注 filter、loadFilters 和 handle 两个方法。

优先级

在配置filter时，网关根据排序进行优先级的，第一个order为1，第二个order为2，如此规律进行。

AnnotationAwareOrderComparator # 比较排序

编辑

上次更新: 2021/12/17, 16:15:07