public async Task InvokeAsync(HttpContext context)
{
string address = context.Connection.RemoteIpAddress.ToString();
IGeoIp geoIp = null;
if (this.cache != null)
{
geoIp = this.cache.Get(address);
if (geoIp == null)
{
geoIp = this.provider.Resolve(address);
this.cache.Put(address, geoIp);
}
}
else
{
geoIp = this.provider.Resolve(address);
}
if (!context.Items.ContainsKey("geoIp"))
{
context.Items.Add("geoIp", geoIp);
}
await this.next(context);
}
public void Put(string address, IGeoIp geoIp)
{
if (this.cache.TryGetValue(address, out IGeoIp oldGeoIp))
{
this.cache.AddOrUpdate(address, geoIp, (p, q) => geoIp);
}
else
{
if (this.maxSize.HasValue && (this.cache.Count + 1) > this.maxSize)
{
this.cache.Clear();
}
this.cache.TryAdd(address, geoIp);
}
}
