/// <summary>
/// 获取微信JS接口的临时票据
/// </summary>
/// <param name="token"></param>
/// <param name="oldTicket">旧的凭据（为空则会尝试用已经获取到的未过期票据）</param>
/// <returns></returns>
public static JsTicket GetJsTicket(this AccessToken token, JsTicket oldTicket = null)
{
if (oldTicket == null)
{
oldTicket = ticketDic.Where(d => d.Key == token).Select(d => d.Value).FirstOrDefault();
}
if (oldTicket != null && oldTicket.ExpiresTime > DateTime.Now)
{
return(oldTicket);
}
if (Monitor.TryEnter(ticketDic, TimeSpan.FromMilliseconds(100)))
{
var data = Api.Ticket.GetJsTicket(token.access_token);
ticketDic[token] = data;
var removeList = ticketDic.Where(d => d.Value.ExpiresTime < DateTime.Now).Select(d => d.Key).ToList();
foreach (var item in removeList)
{
ticketDic.Remove(item);
}
Monitor.Exit(ticketDic);
return(data);
}
else
{
return(oldTicket);
}
}
public JsTicket GetJsTicket()
{
try
{
JsTicket ticket = null;
WeiXinToken token = _tokenProvider.GetToken();
if (token.JsTicket != null)
{
ticket = token.JsTicket;
return(ticket);
}
AccessToken accessToken = this.GetAccessToken();
string url = string.Format(WeiXinConst.JS_TICKET_URL, accessToken.Value);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
WebResponse response = request.GetResponse();
if (response.GetResponseStream() != null)
{
StreamReader sr = new StreamReader(response.GetResponseStream());
string json = sr.ReadToEnd();
JavaScriptSerializer serlizer = new JavaScriptSerializer();
var obj = serlizer.Deserialize <dynamic>(json);
ticket.Value = obj.ticket;
ticket.ExpireIn = obj.expires_in;
token.JsTicket = ticket;
_tokenProvider.SaveToken(token);
}
return(ticket);
}
catch (Exception ex)
{
throw ex;
}
}
public static JsTicket GetJsTicket(string access_token, JsTicket oldTicket = null) => oldTicket?.ExpiresTime < DateTime.Now ? oldTicket : GetJsTicket(access_token);
/// <summary>
/// 获取前端网页初始化接口的必要参数
/// 返回Json字符串{appid,timestamp,nonce,signature}
/// </summary>
/// <param name="ticket"></param>
/// <param name="cfg">基础接口配置</param>
/// <param name="url">调用页面的Url</param>
/// <returns></returns>
public static string CreatePackage(this JsTicket ticket, Config cfg, string url) =>
Api.Ticket.CreateJsPackage(cfg.AppId, ticket.ticket, url);
