【第三方登录】之QQ第三方登录

最近公司做了个网站，需要用到第三方登录的东西。有QQ第三方登录，微信第三方登录。先把QQ第三方登录的代码列一下吧。

 public partial class QQBack : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Log.Debug("QQ登录", "登录开始");
            string app_id = "";
            var serializer = new JavaScriptSerializer();
            var data = "";
            Dictionary<string, string> obj = new Dictionary<string, string>();
            //获取 accessToken
            string code = Request.QueryString["code"];
            if (!string.IsNullOrEmpty(code))
            {
                string url = string.Format("https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&client_id={0}&client_secret=872660e40efb3b16eecfce835b3ce081&code={1}&state={2}&redirect_uri={3}"
                    , app_id
                    , code
                    , "test"
                    , "回调地址,还是当前页面地址，以http://www.xxx.com/xxx.aspx  模式，并且对地址进行编码！");

                data = Tools.GetPage(url);
                Log.Debug("第一个地址：", data);
                string accessToken = "";
                string[] array_access_token = data.Split('&');
                if (array_access_token != null && array_access_token.Length > 0)
                {
                    for (int i = 0; i < array_access_token.Length; i++)
                    {
                        if (!string.IsNullOrEmpty(array_access_token[i]))
                        {
                            string[] keyValue = array_access_token[i].Split('=');

                            if (keyValue != null && keyValue.Length > 0)
                            {
                                if (keyValue[0] == "access_token")
                                {
                                    accessToken = keyValue[1];
                                }
                            }
                        }
                    }
                }

                //获取OpenID
                string url2 = "https://graph.qq.com/oauth2.0/me?access_token=" + accessToken;
                data = Tools.GetPage(url2);
                Log.Debug("第二个地址：", data);
                data = data.Replace("callback(", "").Replace(");", "");
                obj = serializer.Deserialize<Dictionary<string, string>>(data);
                string openid;
                if (!obj.TryGetValue("openid", out openid))
                    return;

                string url3 = string.Format("https://graph.qq.com/user/get_user_info?access_token={0}&oauth_consumer_key={1}&openid={2}", accessToken, app_id, openid);

                data = Tools.GetPage(url3);
                Log.Debug("第三个地址：", data);
                var userInfo = serializer.Deserialize<Dictionary<string, string>>(data);

                if (openid != null && userInfo["nickname"] != null)
                {
                   Users _MTUsers =  GetModel( openid);  //获取用户信息
                  
                    if (_MTUsers == null)
                    {
                      Insert(_MTUsers);  //如果不存在，创建
                    }
                    else
                    {
                        _MTUsers.LastLogin = DateTime.Now;
                        _MTUsers.LastUpdated = DateTime.Now;
                        Instance.MTUsers.Business.Update(_MTUsers);  //存在则修改
                    }
                    Session["CurrentUser"] = _MTUsers;               //将当前登录的用户放入session中
                    Log.Debug("QQ登录", "执行页面跳转成功");
                }
            }
            Log.Debug("QQ登录", "登录结束");
        }
    }