static void Download(GetImageRequest request)
{
var buffer = new byte [4*1024];
try
{
Action<UpdateImage> callback;
if(_requests.TryGetValue(request, out callback))
{
string filetype = request.Uri.Segments.Last().Split('.').Last();
string target = _cacheDir + request.Id + "." + filetype;
if(!File.Exists(target))
{
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
using (var file = new FileStream (target, FileMode.Create, FileAccess.Write, FileShare.Read))
{
var req = WebRequest.Create (request.Uri) as HttpWebRequest;
using (var resp = req.GetResponse())
using (var s = resp.GetResponseStream())
{
int n;
while ((n = s.Read (buffer, 0, buffer.Length)) > 0)
{
file.Write (buffer, 0, n);
}
}
}
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
}
callback(new UpdateImage(request.Number, request.Uri, UIImage.FromFileUncached(target)));
}
}
catch (Exception ex)
{
Console.WriteLine ("Problem with {0} {1}", request.Uri, ex);
}
}
public static void GetImage(GetImageRequest request, Action<UpdateImage> callback)
{
_requests.Add(request, callback);
_queue.Queue(request);
}
