wx jssdk

    public static Dictionary<string,string> jsstr(string url)
    {
        //noncestr
        string noncestr=jssdk.GenerateRandom(16);

        //timestamp
        TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
        string timestamp = Convert.ToInt64(ts.TotalSeconds).ToString();

        //jsapi_ticket 尝试本地读取
        //{"ticket":"~~~","expires_in":1432785380}
        //^^json格式

        int i=0;
        string path=System.Web.HttpContext.Current.Server.MapPath("~/App_Data/jsapi_ticket.txt");
        read_jspai: string json=txtdata.txtread(path);
        string jsapi_ticket=jssdk.rejson(json,"ticket");
        string expires_in=jssdk.rejson(json,"expires_in");
        //jsapi_ticket 是否超时
        if(int.Parse(expires_in)<int.Parse(timestamp))
        {
            //只会调一次接口，避免重复
            if(i==0)
            {
                //获取最新 jsapi_ticket_get  --AppID--AppSecret
                string info=jssdk.jsapi_ticket_get("!!!!","@@@@");
                if(info=="ok")
                {
                    i=1;
                    goto read_jspai;
                }

            }
        }
        string signaturestr = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + url;
        signaturestr=jssdk.SHA1(signaturestr);

        Dictionary<string, string> mydic = new Dictionary<string, string>();
        mydic.Add("appId","wx5b7c682cca621df2");
        mydic.Add("timestamp",timestamp);
        mydic.Add("nonceStr",noncestr);
        mydic.Add("signature", signaturestr);

        return mydic;

    }