1 #region 跨域设置

 2 //注意：放到services.AddMvc()之前

 3 services.AddCors(options => {

 4                 options.AddPolicy("any",builder => {

 5

 6                  #region 允许任何来源主机访问

 7                    builder.AllowAnyOrigin();

 8                  #endregion

 9

10                   #region 允许访问的特定域

11                     //builder.WithOrigins("http://*.*.*.*")

12                     //.AllowAnyMethod()

13                     //.AllowAnyHeader()

14                     //.AllowCredentials();

15                    #endregion

16        });

17 });

18 #endregion

1 //跨域设置

2 app.UseMiddleware<CorsMiddleware>();

 1 /// <summary>

 2     /// CORS 中间件 【解决跨域问题】

 3     /// </summary>

 4     public class CorsMiddleware

 5     {

 6         private readonly RequestDelegate _next;

 7         public CorsMiddleware(RequestDelegate next)

 8         {

 9             _next = next;

10         }

11

12         public async Task Invoke(HttpContext context)

13         {

14             if (!context.Response.Headers.ContainsKey("Access-Control-Allow-Origin"))

15             {

16                 context.Response.Headers.Add("Access-Control-Allow-Origin", "*");

17             }

18             await _next(context);

19         }

20     }