/// <summary>
/// Get assicate data by thread safe way
/// </summary>
/// <param name="token">token</param>
/// <returns>The associate object</returns>
private MemoryTokenData GetAssociateData(string token)
{
MemoryTokenData tokenData = null;
lock (this.tokens)
{
if (this.tokens.ContainsKey(token))
{
tokenData = this.tokens[token];
}
}
return(tokenData);
}
/// <summary>
/// The method is genarate token which associate with a object
/// </summary>
/// <param name="obj">the object which associate with the token</param>
/// <returns>return a token</returns>
public virtual string GeneToken(object obj)
{
string token = Guid.NewGuid().ToString("N");
var tokenData = new MemoryTokenData();
tokenData.LastAccessTime = DateTime.Now;
tokenData.AssociateData = obj;
// because the Dictionary type is not thread safe object, so use lock to ensure thread safe
lock (this.tokens)
{
this.tokens.Add(token, tokenData);
}
return(token);
}
/// <summary>
/// update token expired time
/// basically, it will be invoke in Authorization Filter
/// </summary>
/// <param name="token">token</param>
public virtual void RefreshToken(string token)
{
MemoryTokenData tokenData = this.GetAssociateData(token);
if (tokenData != null)
{
// If the token didn't not expired. refresh the last access time
// else remove the token from tokens
if (tokenData.LastAccessTime.AddSeconds(this.timeout) >= DateTime.Now)
{
tokenData.LastAccessTime = DateTime.Now;
}
else
{
this.RemoveToken(token);
}
}
}
/// <summary>
/// Get the associate object by token
/// </summary>
/// <typeparam name="T">The object type</typeparam>
/// <param name="token">token</param>
/// <returns>the assicate object will return if the token exist, the null will be return if the token didn't exist</returns>
public virtual T GetAssociateObjectByToken <T>(string token)
{
T result = default(T);
MemoryTokenData tokenData = this.GetAssociateData(token);
if (tokenData != null)
{
// If the token didn't not expired. refresh the last access time and associate data
// else remove the token from tokens
if (tokenData.LastAccessTime.AddSeconds(this.timeout) >= DateTime.Now)
{
if (tokenData.AssociateData != null)
{
result = (T)tokenData.AssociateData;
}
}
else
{
this.RemoveToken(token);
}
}
return(result);
}