后端

1、Startup.cs 中设置允许传递凭据

application.UseCors(builder =>            {                builder.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader().AllowCredentials();            });

2、设置cookie，需要带上设置成 SameSiteMode.None

var options = new CookieOptions            {                HttpOnly = true,                Expires = cookieExpiresDate,                SameSite = Microsoft.AspNetCore.Http.SameSiteMode.None            };            _httpContextAccessor.HttpContext.Response.Cookies.Append(cookieName, userGuid.ToString(), options);

 

前端

在fetch中设置请求时附带cookie信息

fetch(url, {    method: 'POST',    credentials: 'include',    headers: {        'Content-Type': 'application/x-www-form-urlencoded'    },    body: JSON.stringify(postData)}).then(function(response) {    console.log(response);});