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PhotoRequestHandler.cs

/*
 * LiveWebGalleryExtension.PhotoRequestHandler.cs
 *
 * Author(s):
 *    Anton Keks  <anton@azib.net>
 *
 * This is free software. See COPYING for details
 */

using System;
using System.IO;
using System.Text;

using FSpot;
using FSpot.Filters;
using FSpot.Utils;
using Hyena;

namespace LiveWebGalleryExtension
{     
      public class PhotoRequestHandler : RequestHandler
      {     
            private LiveWebGalleryStats stats;
            
            public PhotoRequestHandler (LiveWebGalleryStats stats)
            {
                  this.stats = stats;
            }
            
            public override void Handle (string requested, Stream stream)
            {
                  uint photo_id = uint.Parse (requested);
                  Photo photo = App.Instance.Database.Photos.Get (photo_id);
                  
                  SendImage (photo, stream);
                              }
            
            protected virtual void SendImage (Photo photo, Stream stream) 
            {
                  string path = photo.DefaultVersion.Uri.LocalPath;
                  FileInfo file_info = new FileInfo(path);
                  if (!file_info.Exists) {
                        SendError (stream, "404 The file is not on the disk");
                        return;
                  }

                  FilterSet filters = new FilterSet ();
                  filters.Add (new JpegFilter ());
                  filters.Add (new ResizeFilter (1600));
                  filters.Add (new OrientationFilter ());

                  using (FilterRequest request = new FilterRequest (photo.DefaultVersion.Uri)) {
                        filters.Convert (request);
                        file_info = new FileInfo (request.Current.LocalPath);
                        SendFile (file_info, photo, stream);
                  }

                  if (stats != null)
                        stats.PhotoViews++;
            }
            
            protected void SendFile (FileInfo file, Photo photo, Stream dest)
            {
                  stats.BytesSent += (int)file.Length;                  
                  Log.DebugFormat ("Sending {0}, {1} kb", file.FullName, file.Length / 1024);
                  SendHeadersAndStartContent(dest, "Content-Type: " + MimeTypeForExt (file.Extension),
                                                                   "Content-Length: " + file.Length,
                                                 "Last-Modified: " + photo.Time.ToString ("r"));
                  using (Stream src = file.OpenRead ()) {
                        byte[] buf = new byte[10240];
                        int read;
                        while((read = src.Read(buf, 0, buf.Length)) != 0) {
                              dest.Write (buf, 0, read);
                        }
                  }
            }
      }
      
      public class ThumbnailRequestHandler : PhotoRequestHandler
      {     
            public ThumbnailRequestHandler (LiveWebGalleryStats stats) 
                  : base (stats) {}
            
            protected override void SendImage (Photo photo, Stream dest) 
            {
                  Gdk.Pixbuf thumb = XdgThumbnailSpec.LoadThumbnail (photo.DefaultVersion.Uri, ThumbnailSize.Large);
                  byte[] buf = thumb.SaveToBuffer ("png");
                  SendHeadersAndStartContent(dest, "Content-Type: " + MimeTypeForExt (".png"),
                                                                   "Content-Length: " + buf.Length,
                                                 "Last-Modified: " + photo.Time.ToString ("r"));
                  dest.Write (buf, 0, buf.Length);
            }
      }
}

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