/// <summary>
/// Create a new ban for the given ip lasting for the given period.
/// </summary>
public static void Ban(string ip, TimeSpan @for, string reason)
{
// Never ban an internal IP
if (Current.IsPrivateIP(ip))
{
return;
}
var db = Current.WriteDB;
var now = Current.Now;
var newBan =
new IPBan
{
CreationDate = now,
ExpirationDate = now + @for,
IP = ip,
Reason = reason
};
db.IPBans.InsertOnSubmit(newBan);
db.SubmitChanges();
var period = new BanPeriod {
CreationDate = newBan.CreationDate, ExpirationDate = newBan.ExpirationDate
};
BannedIPCache.AddOrUpdate(ip, period, (string key, BanPeriod old) => period);
}
/// <summary>
/// Call to periodically slurp down new bans and the like.
///
/// We want this stuff in the DB for persistence (so an App cycle doesn't lift bans),
/// but we don't want an extra DB hit on every page either.
///
/// Thus, we maintain a copy of the "important" parts of the IPBans table in memory.
/// </summary>
private static void TryRefreshCache()
{
if (Current.Now < NextRefresh) return;
lock (UpdateLock)
{
if (Current.Now < NextRefresh) return;
var now = Current.Now;
var getNewBansFrom = BannedIPCache.Count == 0 ? SqlDateTime.MinValue.Value : BannedIPCache.Max(i => i.Value.CreationDate);
var newBans = Current.ReadDB.IPBans.Where(b => b.CreationDate > getNewBansFrom);
foreach(var b in newBans){
var period = new BanPeriod{ CreationDate = b.CreationDate, ExpirationDate = b.ExpirationDate};
BannedIPCache.AddOrUpdate(b.IP, period, (string key, BanPeriod old) => period);
}
var expiredBans = BannedIPCache.Where(i => i.Value.ExpirationDate < now).Select(i => i.Key);
BanPeriod ignored;
foreach (var expired in expiredBans) BannedIPCache.TryRemove(expired, out ignored);
NextRefresh = Current.Now + TimeSpan.FromMinutes(5);
}
}
/// <summary>
/// Call to periodically slurp down new bans and the like.
///
/// We want this stuff in the DB for persistence (so an App cycle doesn't lift bans),
/// but we don't want an extra DB hit on every page either.
///
/// Thus, we maintain a copy of the "important" parts of the IPBans table in memory.
/// </summary>
private static void TryRefreshCache()
{
if (Current.Now < NextRefresh)
{
return;
}
lock (UpdateLock)
{
if (Current.Now < NextRefresh)
{
return;
}
var now = Current.Now;
var getNewBansFrom = BannedIPCache.Count == 0 ? SqlDateTime.MinValue.Value : BannedIPCache.Max(i => i.Value.CreationDate);
var newBans = Current.ReadDB.IPBans.Where(b => b.CreationDate > getNewBansFrom);
foreach (var b in newBans)
{
var period = new BanPeriod {
CreationDate = b.CreationDate, ExpirationDate = b.ExpirationDate
};
BannedIPCache.AddOrUpdate(b.IP, period, (string key, BanPeriod old) => period);
}
var expiredBans = BannedIPCache.Where(i => i.Value.ExpirationDate < now).Select(i => i.Key);
BanPeriod ignored;
foreach (var expired in expiredBans)
{
BannedIPCache.TryRemove(expired, out ignored);
}
NextRefresh = Current.Now + TimeSpan.FromMinutes(5);
}
}
/// <summary>
/// Create a new ban for the given ip lasting for the given period.
/// </summary>
public static void Ban(string ip, TimeSpan @for, string reason)
{
// Never ban an internal IP
if (Current.IsPrivateIP(ip)) return;
var db = Current.WriteDB;
var now = Current.Now;
var newBan =
new IPBan
{
CreationDate = now,
ExpirationDate = now + @for,
IP = ip,
Reason = reason
};
db.IPBans.InsertOnSubmit(newBan);
db.SubmitChanges();
var period = new BanPeriod { CreationDate = newBan.CreationDate, ExpirationDate = newBan.ExpirationDate };
BannedIPCache.AddOrUpdate(ip, period, (string key, BanPeriod old) => period);
}
public BanPeriod Ban(BanPeriod period, Guid userId)
{
return(period);
}
