/// <summary>获取在线人数（15分钟内活动的用户），加了缓存</summary>
public static int GetOnlineCount()
{
return((int)Asp.GetCacheData(
"OnlineCount",
DateTime.Now.AddMinutes(5),
() => {
DateTime lastDt = DateTime.Now.AddMinutes(-15);
return Set.Where(o => o.UpdateDt > lastDt).Count();
}));
}
/// <summary>获取公众号调用微信JS接口的临时票据(有效期7200秒，开发者必须在自己的服务全局缓存jsapi_ticket)（未测试)</summary>
static string GetJsSdkTicket(string accessToken)
{
var dt = DateTime.Now.AddMinutes(60);
return(Asp.GetCacheData <string>("WechatJSAPITicket", dt, () =>
{
var url = string.Format("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", accessToken);
var txt = HttpHelper.Get(url);
return txt.ParseJObject()["ticket"].ToString();
}));
}
/// <summary>获取微信网页授权登录AccessToken</summary>
/// <remarks>
/// https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140842
/// 网页授权流程分为四步：
/// 1、引导用户进入授权页面同意授权，获取code
/// 2、通过code换取网页授权access_token（与基础支持中的access_token不同）
/// 3、如果需要，开发者可以刷新网页授权access_token，避免过期
/// 4、通过网页授权access_token和openid获取用户基本信息（支持UnionID机制）
/// </remarks>
public static OAuthGetTokenReply OAuthGetAccessToken(string code)
{
var key = "WechatWebAccessToken";
var dt = DateTime.Now.AddMinutes(60);
return(Asp.GetCacheData <OAuthGetTokenReply>(key, dt, () =>
{
var url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code",
WechatConfig.OpenAppId, WechatConfig.OpenAppSecret, code
);
var reply = HttpHelper.Get(url);
return reply.ParseJson <OAuthGetTokenReply>();
}));
}
