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在你將現有的用戶登錄(Sign In)站點從ASP.NET遷移至ASP.NET Core時,你將面臨這樣一個問題——如何讓ASP.NET與ASP.NET Core用戶驗證Cookie并存,讓ASP.NET應用與ASP.NET Core應用分別使用各自的Cookie?因為ASP.NET用的是FormsAuthentication,ASP.NET Core用的是claims-based authentication,而且它們的加密算法不一樣。
我們采取的解決方法是在ASP.NET Core中登錄成功后,分別生成2個Cookie,同時發送給客戶端。
生成ASP.NET Core的基于claims-based authentication的驗證Cookie比較簡單,示例代碼如下:
var claimsIdentity = new ClaimsIdentity(new Claim[] { new Claim(ClaimTypes.Name, loginName) }, "Basic"); var claimsPrincipal = new ClaimsPrincipal(claimsIdentity); await context.Authentication.SignInAsync(_cookieAuthOptions.AuthenticationScheme, claimsPrincipal, new AuthenticationProperties { IsPersistent = isPersistent, ExpiresUtc = DateTimeOffset.Now.Add(_cookieAuthOptions.ExpireTimeSpan) });
生成ASP.NET的基于FormsAuthentication的驗證Cookie稍微麻煩些。
首先要用ASP.NET創建一個Web API站點,基于FormsAuthentication生成Cookie,示例代碼如下:
public IHttpActionResult GetAuthCookie(string loginName, bool isPersistent) { var cookie = FormsAuthentication.GetAuthCookie(loginName, isPersistent); return Json(new { cookie.Name, cookie.Value, cookie.Expires }); }
然后在ASP.NET Core登錄站點中寫一個Web API客戶端獲取Cookie,示例代碼如下:
public class UserServiceAgent { private static readonly HttpClient _httpClient = new HttpClient(); public static async Task<Cookie> GetAuthCookie(string loginName, bool isPersistent) { var response = await _httpClient.GetAsync(url); response.EnsureSuccessStatusCode(); return await response.Content.ReadAsAsync<Cookie>(); } }
最后在ASP.NET Core登錄站點的登錄成功后的處理代碼中專門向客戶端發送ASP.NET FormsAuthentication的Cookie,示例代碼如下:
var cookie = await _userServiceAgent.GetAuthCookie(loginName, isPersistent); var options = new CookieOptions() { Domain = _cookieAuthOptions.CookieDomain, HttpOnly = true }; if (cookie.Expires > DateTime.Now) { options.Expires = cookie.Expires; } context.Response.Cookies.Append(cookie.Name, cookie.Value, options);
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