The 'Access-Control-Allow-Origin' header contains multiple values'*, *', but only one is allowed.
使用Ajax跨域请求资源,Nginx作为代理,出现:The ‘Access-Control-Allow-Origin’ header contains multiple values ‘*, *‘, but only one is allowed 错误。
服务端允许跨域配置:
\#region 设置允许跨域,允许复杂请求
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "\*");
if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
\{
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,PATCH,OPTIONS");
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Accept, Authorization");
//HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", "1728000");
HttpContext.Current.Response.End();
\}
\#endregion
Nginx的配置:
add\_header 'Access-Control-Allow-Origin' '\*';
location / \{
if ($request\_method = 'OPTIONS') \{
add\_header Access-Control-Allow-Origin \*;
add\_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,PATCH,OPTIONS;
return 200;
\}
proxy\_pass http://xx:8002/;
\#proxy\_pass http://localhost:62249/;
\}
看上面错误提示,contains multiple values “*“ 意思就是设置了2次跨域,但是只有一个是允许的,移除其中的任意一个就好了。如果服务器设置了允许跨域,使用Nginx代理里面就不需要了(或者就不用使用Nginx了)
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