微信--獲取jsapi_ticket 然后在計算出signature

 最近做微信公眾號，記錄一下，僅供參看。

 

關於jsapi_ticket微信公眾號有相關說明：

生成簽名之前必須先了解一下jsapi_ticket，jsapi_ticket是公眾號用於調用微信JS接口的臨時票據。正常情況下，jsapi_ticket的有效期為7200秒，通過access_token來獲取。由於獲取jsapi_ticket的api調用次數非常有限，頻繁刷新jsapi_ticket會導致api調用受限，影響自身業務，開發者必須在自己的服務全局緩存jsapi_ticket 。 

 

Ticket

1 public class Ticket
2  { 3 public string Value { get; set; } 4 public DateTime Time { get; set; } 5 }

 

WeixinServer

 1        #region 靜態全局變量
 2         private static Token _Token = null;
 3         private static Ticket _Ticket = null; 4 private readonly static string appid = "wx123456789000"; 5 private readonly static string secret = "abcdefghijklmnopqrstuvwxyz"; 6 private readonly static string domain = "http://wechat.mydomain.com"; 7 #endregion

        public string GetTicket()
        {
            bool first = false;
            if (_Ticket == null)
            {
                _Ticket = new Ticket();
                first = true;
            }
            TimeSpan ts = DateTime.Now - _Ticket.Time;
            if (ts.Minutes > 30 || first)
            {
                string access_token = AccessToken();
                string url1 = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_token + "&type=jsapi";
                string requstStr = HttpHelper.Get(url1);
                string ticket = GetParameter("ticket", requstStr);
                _Ticket.Value = ticket;
                _Ticket.Time = DateTime.Now;
            }
            return _Ticket.Value;
        }

        //獲取jssdk所需簽名
        public string Signature(string url)
        {
            string noncestr = "Wm3WZYTPz0wzccnW";
            int timestamp = 1414587457;
            string ticket = GetTicket();

            string string1 = "jsapi_ticket=" + ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + url;
            string signature = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(string1, "SHA1");
            return signature;
        }