nginx中服务A(前端)和服务B(后端)，服务A请求服务B的接口，get和post请求可以，但是delete和put请求就会出错。（ has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.）
nginx中服务A(前端)和服务B(后端)，服务A请求服务B的接口，get和post请求可以，但是delete和put请求就会出错。（ has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.）