public AccessToken GetAccessToken()
{
try
{
AccessToken accessToken = null;
WeiXinToken token = _tokenProvider.GetToken();
if (token.AccessToken != null)
{
accessToken = token.AccessToken;
return(accessToken);
}
string url = string.Format(WeiXinConst.ACCESS_TOKNE_URL, _config.AppId, _config.AppSecret);
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);
accessToken.Value = obj.access_token;
accessToken.ExpireIn = obj.expires_in;
token.AccessToken = accessToken;
_tokenProvider.SaveToken(token);
}
return(accessToken);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 通过code换取网页授权access_token和openid的返回数据
/// </summary>
/// <param name="code">code</param>
public async Task <WeiXinToken> GetOpenidAndAccessTokenFromCodeAsync(string userid, string code)
{
WeiXinToken token = null;
string redisKey = $"{RedisKey}:userid:{userid}";
string tokenString = RedisHelper.Database.StringGet(redisKey);
if (!string.IsNullOrWhiteSpace(tokenString))
{
var wexintoken = JsonConvert.DeserializeObject <WeiXinToken>(tokenString);
//失效时间大于当前时间
if (DateTime.Now >= token.expires_date)
{
return(token);
}
}
OAuthAccessTokenResult accessToken = OAuthApi.GetAccessToken(AppID, AppSecret, code);
if (accessToken.errcode == ReturnCode.请求成功)
{
token = new WeiXinToken();
token.access_token = accessToken.access_token;
token.create_date = DateTime.Now;
token.expires_in = accessToken.expires_in;
token.expires_date = token.create_date.AddSeconds(accessToken.expires_in);
token.openid = accessToken.openid;
token.refresh_token = accessToken.refresh_token;
token.scope = accessToken.scope;
token.unionid = accessToken.unionid;
RedisHelper.Database.StringSet(redisKey, token.access_token, new TimeSpan(1, 50, 0));
}
return(token);
}
/// <summary>
/// 获取token(带缓存)
/// </summary>
/// <returns></returns>
public WeiXinToken GetAccessTokenCache(string appid = "")
{
//var model = RedisHelper<WeiXinToken>.GetValus("WeiXinToken");
//if (model != null)
//{
// return model;
//}
var model = new WeiXinToken();
model.WxToken = GetAccessToken();
model.ExpirationTime = DateTime.Now.AddMinutes(110);
//微信token只有120分钟有效期,这里我们设置为110分钟,提前重新获取token
//RedisHelper<string>.SetValus("WeiXinToken", JsonHelper.ObjectToJSON(model), model.ExpirationTime);
return(model);
}
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;
}
}
