using System;
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using System.Web;
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using System.Web.Security;
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using DotNetOpenAuth.AspNet;
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using Microsoft.AspNet.Membership.OpenAuth;
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namespace CLOUDWEB.Account
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{
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public partial class RegisterExternalLogin : System.Web.UI.Page
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{
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protected string ProviderName
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{
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get { return (string)ViewState["ProviderName"] ?? String.Empty; }
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private set { ViewState["ProviderName"] = value; }
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}
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protected string ProviderDisplayName
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{
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get { return (string)ViewState["ProviderDisplayName"] ?? String.Empty; }
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private set { ViewState["ProviderDisplayName"] = value; }
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}
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protected string ProviderUserId
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{
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get { return (string)ViewState["ProviderUserId"] ?? String.Empty; }
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private set { ViewState["ProviderUserId"] = value; }
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}
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protected string ProviderUserName
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{
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get { return (string)ViewState["ProviderUserName"] ?? String.Empty; }
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private set { ViewState["ProviderUserName"] = value; }
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}
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protected void Page_Load()
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{
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if (!IsPostBack)
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{
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ProcessProviderResult();
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}
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}
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protected void logIn_Click(object sender, EventArgs e)
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{
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CreateAndLoginUser();
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}
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protected void cancel_Click(object sender, EventArgs e)
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{
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RedirectToReturnUrl();
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}
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private void ProcessProviderResult()
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{
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// 处理请求中的身份验证提供程序返回的结果
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ProviderName = OpenAuth.GetProviderNameFromCurrentRequest();
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if (String.IsNullOrEmpty(ProviderName))
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{
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Response.Redirect(FormsAuthentication.LoginUrl);
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}
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// 生成重定向 URL 以进行 OpenAuth 验证
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var redirectUrl = "~/Account/RegisterExternalLogin";
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var returnUrl = Request.QueryString["ReturnUrl"];
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if (!String.IsNullOrEmpty(returnUrl))
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{
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redirectUrl += "?ReturnUrl=" + HttpUtility.UrlEncode(returnUrl);
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}
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// 验证 OpenAuth 负载
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var authResult = OpenAuth.VerifyAuthentication(redirectUrl);
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ProviderDisplayName = OpenAuth.GetProviderDisplayName(ProviderName);
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if (!authResult.IsSuccessful)
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{
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Title = "外部登录失败";
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userNameForm.Visible = false;
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providerMessage.Text = String.Format("外部登录 {0} 失败，", ProviderDisplayName);
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// 若要查看此错误，请在 web.config 中启用页跟踪(<system.web><trace enabled="true"/></system.web>)，然后访问 ~/Trace.axd
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Trace.Warn("OpenAuth", String.Format("使用 {0}) 验证身份验证时出错", ProviderDisplayName), authResult.Error);
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return;
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}
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// 用户已成功地使用提供程序登录
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// 检查用户是否已在本地注册
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if (OpenAuth.Login(authResult.Provider, authResult.ProviderUserId, createPersistentCookie: false))
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{
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RedirectToReturnUrl();
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}
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// 在 ViewState 中存储提供程序详细信息
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ProviderName = authResult.Provider;
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ProviderUserId = authResult.ProviderUserId;
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ProviderUserName = authResult.UserName;
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// 从操作中去除查询字符串
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Form.Action = ResolveUrl(redirectUrl);
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if (User.Identity.IsAuthenticated)
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{
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// 用户已进行身份验证，请添加外部登录并重定向到返回 URL
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OpenAuth.AddAccountToExistingUser(ProviderName, ProviderUserId, ProviderUserName, User.Identity.Name);
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RedirectToReturnUrl();
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}
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else
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{
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// 这是新用户，请要求该用户提供所需的成员名称
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userName.Text = authResult.UserName;
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}
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}
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private void CreateAndLoginUser()
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{
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if (!IsValid)
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{
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return;
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}
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var createResult = OpenAuth.CreateUser(ProviderName, ProviderUserId, ProviderUserName, userName.Text);
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if (!createResult.IsSuccessful)
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{
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userNameMessage.Text = createResult.ErrorMessage;
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}
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else
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{
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// 已成功创建并关联用户
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if (OpenAuth.Login(ProviderName, ProviderUserId, createPersistentCookie: false))
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{
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RedirectToReturnUrl();
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}
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}
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}
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private void RedirectToReturnUrl()
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{
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var returnUrl = Request.QueryString["ReturnUrl"];
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if (!String.IsNullOrEmpty(returnUrl) && OpenAuth.IsLocalUrl(returnUrl))
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{
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Response.Redirect(returnUrl);
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}
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else
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{
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Response.Redirect("~/");
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}
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}
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}
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}
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