asp.net core 跨域

当出现

The CORS protocol does not allow specifying a wildcard (any) origin and credentials at the same time. Configure the CORS policy by listing individual origins if credentials needs to be supported 跨域错误的时候

只需要给予一个可信列表即可。修改内容如下：

        services.AddCors(options => options.AddPolicy("CorsPolicy",
            builder =>
            {
                builder.WithOrigins(new string[] { "http://127.0.0.1:5500" })
                    .AllowAnyMethod()
                    .AllowAnyHeader()
                    .AllowCredentials();
            }));

如果真的就不想做任何限制，其实也是有办法的。只需要将AllowAnyOrigin替换为SetIsOriginAllowed(_ => true)就可以解决。

   services.AddCors(options => options.AddPolicy("CorsPolicy",
            builder =>
            {
                builder.AllowAnyMethod()
                    .SetIsOriginAllowed(_ => true)
                    .AllowAnyHeader()
                    .AllowCredentials();
            }));

 https://www.cnblogs.com/linyijia/p/12981830.html