// ** Rule 1 **//
public bool ReachedMaxReuestPerTimeSpan(DateTime now)
{
bool IsRestricted = false;
if (this._firstCallTime == new DateTime(0001, 1, 1))
{
this._firstCallTime = now;
}
if (this._clientRequestsCountInTimespan == this._allowedrequestCountsPerTimespan &&
now - this._firstCallTime < this._allowedTimeSpan)
{
IsRestricted = true;
}
else if (this._clientRequestsCountInTimespan == this._allowedrequestCountsPerTimespan && now - this._firstCallTime > this._allowedTimeSpan)
{
IsRestricted = true;
}
else if (now - this._firstCallTime > this._allowedTimeSpan)
{
CountCallsForClientsInTimspan[AuthToken] = 0;
if (FirstCallTimeForClientsInTimeSpan.ContainsKey(AuthToken))
{
FirstCallTimeForClientsInTimeSpan[AuthToken] = now;
}
else
{
FirstCallTimeForClientsInTimeSpan.Add(AuthToken, now);
}
}
return(IsRestricted);
}
// Initializing the parameters in the constructor
public RateLimiter(string authToken, TimeSpan timeSpanPastSinceLastCall, TimeSpan allowedTimeSpan, int AllowedrequestCountsPerTimespan)
{
this._authToken = authToken;
// parameters for X request per timespan
this._allowedrequestCountsPerTimespan = AllowedrequestCountsPerTimespan;
if (CountCallsForClientsInTimspan.ContainsKey(AuthToken))
{
this._clientRequestsCountInTimespan = CountCallsForClientsInTimspan[AuthToken];
}
if (FirstCallTimeForClientsInTimeSpan.ContainsKey(AuthToken))
{
this._firstCallTime = FirstCallTimeForClientsInTimeSpan[AuthToken];
}
this._allowedTimeSpan = allowedTimeSpan;
// parameters for a certain timespan passed since the last call;
this._timeSpanPastSinceLastCall = timeSpanPastSinceLastCall;
if (LastCallTimeForClients.ContainsKey(AuthToken))
{
this._lastCallTime = LastCallTimeForClients[AuthToken];
}
}
public void AddRequest(DateTime now, int count)
{
if (CountCallsForClientsInTimspan.ContainsKey(AuthToken))
{
CountCallsForClientsInTimspan[AuthToken] = count + 1;
LastCallTimeForClients[AuthToken] = now;
}
else
{
CountCallsForClientsInTimspan.Add(AuthToken, 1);
FirstCallTimeForClientsInTimeSpan.Add(AuthToken, now);
LastCallTimeForClients.Add(AuthToken, now);
}
}
