報錯The Access-Control-Allow-Origin header contains multiple values

遇到Access to XMLHttpRequest at 'http://api.leyou.com/api/item/category/list?pid=0' from origin 'http://manage.leyou.com' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values 'http://manage.leyou.com, *', but only one is allowed.

經過仔細檢查，發現在nginx的配置裏面也添加了一個add_header Access-Control-Allow-Origin *;

這個問題的原因就是這裏！！！，把這個取消掉就不會出現這個問題了！！！