Spring Cloud Gateway過濾器工廠GatewayFilterFactory初探

1. 概述

在【spring cloud gateway】的官方文檔中，是這樣說明GatewayFilterFactory的：

Route filters allow the modification of the incoming HTTP request or outgoing HTTP response in some manner. Route filters are scoped to a particular route. Spring Cloud Gateway includes many built-in GatewayFilter Factories.

• 路由過濾器容許以某種方式修改傳入的HTTP請求或傳出的HTTP響應；
• GatewayFilter不一樣於GlobalFilter，它只做用於指定的路由；
• spring cloud gateway中內置了大量的網關過濾器工廠；

2. 分類

內置的過濾器工廠一共有22個，位於 org.springframework.cloud.gateway.filter.factory及org.springframework.cloud.gateway.filter.factory.rewrite包中

2.1 根據用途劃分

根據過濾器工廠的用途，能夠劃分爲 Header、Parameter、Path、Body、Status、Session、Redirect、Retry、RateLimiter和Hystrix，具體以下：

• Header

  • AddRequestHeaderGatewayFilterFactory
  • RemoveRequestHeaderGatewayFilterFactory
  • AddResponseHeaderGatewayFilterFactory
  • RemoveResponseHeaderGatewayFilterFactory
  • SetRequestHeaderGatewayFilterFactory
  • SetResponseHeaderGatewayFilterFactory
  • PreserveHostHeaderGatewayFilterFactory
  • RequestHeaderToRequestUriGatewayFilterFactory
  • SecureHeadersGatewayFilterFactory

• Parameter

  • AddRequestParameterGatewayFilterFactory

• Path

  • PrefixPathGatewayFilterFactory
  • RewritePathGatewayFilterFactory
  • SetPathGatewayFilterFactory
  • StripPrefixGatewayFilterFactory

• Body

  • ModifyRequestBodyGatewayFilterFactory
  • ModifyResponseBodyGatewayFilterFactory

• Status

  • SetStatusGatewayFilterFactory

• Session

  • SaveSessionGatewayFilterFactory

• Redirect

  • RedirectToGatewayFilterFactory

• Retry

  • RetryGatewayFilterFactory

• RateLimiter

  • RequestRateLimiterGatewayFilterFactory

• Hystrix

  • HystrixGatewayFilterFactory

2.2 根據做用域劃分

根據過濾器工廠的做用域劃分，主要分爲兩類，一類是做用於 request，另外一類是做用於 response，具體以下：

• Request

  • AddRequestHeaderGatewayFilterFactory
  • RemoveRequestHeaderGatewayFilterFactory
  • SetRequestHeaderGatewayFilterFactory
  • PreserveHostHeaderGatewayFilterFactory
  • RequestHeaderToRequestUriGatewayFilterFactory
  • AddRequestParameterGatewayFilterFactory
  • PrefixPathGatewayFilterFactory
  • RewritePathGatewayFilterFactory
  • SetPathGatewayFilterFactory
  • StripPrefixGatewayFilterFactory
  • ModifyRequestBodyGatewayFilterFactory
  • SaveSessionGatewayFilterFactory
  • RequestRateLimiterGatewayFilterFactory
  • HystrixGatewayFilterFactory

• Response

  • AddResponseHeaderGatewayFilterFactory
  • RemoveResponseHeaderGatewayFilterFactory
  • SetResponseHeaderGatewayFilterFactory
  • SecureHeadersGatewayFilterFactory
  • ModifyResponseBodyGatewayFilterFactory
  • SetStatusGatewayFilterFactory
  • RedirectToGatewayFilterFactory
  • RetryGatewayFilterFactory