spring cloud gateway url重写

将/a/b/c指向到/f/c的控制示例：

spring:
  cloud:
    gateway:
      routes:
      # =====================================
      - id: rewritepath_route
        uri: http://example.org
        predicates:
        - Path=/a/b/**
        filters:
        - RewritePath=/a/b/(?.*), /f/$\{segment}

参见官方文档

RewritePath GatewayFilter Factory

The RewritePath GatewayFilter Factory takes a path regexp parameter and a replacement parameter. This uses Java regular expressions for a flexible way to rewrite the request path.

application.yml. 

spring:
  cloud:
    gateway:
      routes:
      # =====================================
      - id: rewritepath_route
        uri: http://example.org
        predicates:
        - Path=/foo/**
        filters:
        - RewritePath=/foo/(?.*), /$\{segment}

For a request path of /foo/bar, this will set the path to /bar before making the downstream request. Notice the $\ which is replaced with $ because of the YAML spec.