zuul跨域配置报错分析

ajax请求报错：

The 'Access-Control-Allow-Origin' header contains multiple values ', ', but ..

场景：

通过chrome network查看response header中存在多项重复内容

Access-Control-Allow-Credentials: true,true
Access-Control-Allow-Headers: authorization, from
Access-Control-Allow-Methods: GET
Access-Control-Allow-Origin: http://192.168.85.180,http://192.168.85.180
Date: Thu, 30 May 2019 05:23:47 GMT
Transfer-Encoding: chunked
Vary: Origin, Access-Control-Request-Method, Access-Control-Request-Headers, Origin, Access-Control-Request-Method, Access-Control-Request-Headers

处理方法：

zuul.ignored-headers=Access-Control-Allow-Credentials,Access-Control-Allow-Origin,Vary

忽略标注的请求头，避免重复转发造成请求头异常，导致跨域错误