private Access_Token GetAccess_token()
{
Access_Token token = new Access_Token();
//请求获取 access_token。access_token有效期为一个月，所以可以缓存
//2018-05-22 读取缓存的access_token
var resp = Auth.OpenApiFetchToken(ApiKey, SecretKey, true);
ExpireAt = DateTime.Now.AddSeconds((int)resp["expires_in"] - 60 * 60);
IsDev = true;
Token = (string)resp["access_token"];
token.access_token = Token;
token.expires_in = ExpireAt.ToString();
return(token);
}
/// <summary>
/// 根据当前日期 判断Access_Token 是否超期 如果超期返回新的Access_Token 否则返回之前的Access_Token
/// </summary>
/// <returns></returns>
private void IsExistAccess_Token()
{
try
{
DateTime YouXRQ;
// 读取XML文件中的数据，并显示出来 ，注意文件路径
string folder = System.AppDomain.CurrentDomain.BaseDirectory + "Baidu/";
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
string filepath = folder + "access_token.xml";
XmlDocument xml = new XmlDocument();
if (!File.Exists(filepath))
{
var file = File.Create(filepath);
file.Close();
file.Dispose();
//向xml中写入节点
XmlElement root = xml.CreateElement("xml");
xml.AppendChild(root);
xml.Save(filepath);
XmlElement child1 = xml.CreateElement("Access_Token");
XmlElement child2 = xml.CreateElement("Access_YouXRQ");
xml.SelectSingleNode("xml").AppendChild(child1);
xml.SelectSingleNode("xml").AppendChild(child2);
xml.Save(filepath);
}
StreamReader str = new StreamReader(filepath, System.Text.Encoding.UTF8);
if (str.BaseStream.Length == 0)
{
YouXRQ = default(DateTime);
}
else
{
xml.Load(str);
str.Close();
str.Dispose();
Token = xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText;
string time = xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText;
if (string.IsNullOrEmpty(time))
{
YouXRQ = default(DateTime);
}
else
{
YouXRQ = Convert.ToDateTime(time);
}
}
if (DateTime.Now > YouXRQ || YouXRQ == default(DateTime))
{
Access_Token mode = GetAccess_token();
xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText = mode.access_token;
xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText = mode.expires_in;
xml.Save(filepath);
ExpireAt = DateTime.Parse(mode.expires_in);
Token = mode.access_token;
IsDev = true;
}
ExpireAt = YouXRQ;
IsDev = true;
}
catch (Exception ex)
{
}
finally
{
}
}