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using System;
using System.Collections.Generic;
using System.Text;
namespace OpenSim.Framework.Communications.Cache
{
public class AuthedSessionCache
{
public class CacheData
{
private static readonly DateTime UNIX_EPOCH = new DateTime(1970, 1, 1);
private string m_session_id;
private string m_agent_id;
private int m_expire;
private int get_current_unix_time()
{
return (int)(DateTime.UtcNow - UNIX_EPOCH).TotalSeconds;
}
public CacheData(string sid, string aid)
{
m_session_id = sid;
m_agent_id = aid;
m_expire = get_current_unix_time() + DEFAULT_LIFETIME;
}
public CacheData(string sid, string aid, int time_now)
{
m_session_id = sid;
m_agent_id = aid;
m_expire = time_now + DEFAULT_LIFETIME;
}
public string SessionID
{
get { return m_session_id; }
set { m_session_id = value; }
}
public string AgentID
{
get { return m_agent_id; }
set { m_agent_id = value; }
}
public bool isExpired
{
get { return m_expire < get_current_unix_time(); }
}
public void Renew()
{
m_expire = get_current_unix_time() + DEFAULT_LIFETIME;
}
}
private static readonly int DEFAULT_LIFETIME = 30;
private Dictionary<string, CacheData> m_authed_sessions = new Dictionary<string,CacheData>();
// private int m_session_lifetime = DEFAULT_LIFETIME;
public AuthedSessionCache()
{
// m_session_lifetime = DEFAULT_LIFETIME;
}
public AuthedSessionCache(int timeout)
{
// m_session_lifetime = timeout;
}
public CacheData getCachedSession(string session_id, string agent_id)
{
CacheData ret = null;
lock (m_authed_sessions)
{
if (m_authed_sessions.ContainsKey(session_id))
{
CacheData cached_session = m_authed_sessions[session_id];
if (!cached_session.isExpired && cached_session.AgentID == agent_id)
{
ret = m_authed_sessions[session_id];
// auto renew
m_authed_sessions[session_id].Renew();
}
}
}
return ret;
}
public void Add(string session_id, string agent_id)
{
CacheData data = new CacheData(session_id, agent_id);
lock (m_authed_sessions)
{
if (m_authed_sessions.ContainsKey(session_id))
{
m_authed_sessions[session_id] = data;
}
else
{
m_authed_sessions.Add(session_id, data);
}
}
}
}
}
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