vue解决使用$http获取数据时报错的问题

在引用vue作为一个插件时,使用$http获取数据时报错 Failed to load http://****/ajaxGrainRain: Request header field Content-Type is not allowed by Access-Control-Allow-Headers in preflight response. 只需在后台加上 add_header 'Access-Control-Allow-Headers' 'DNT, X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-S