C# Hyena.SafeUri类代码示例

 public System.IO.Stream OpenWrite (SafeUri uri, bool overwrite)
 {
     var file = FileFactory.NewForUri (uri.AbsoluteUri);
     return new GioStream (overwrite
         ? file.Replace (null, false, FileCreateFlags.None, null)
         : file.Create (FileCreateFlags.None, null));
 }

        public AudioCdTrackInfo (AudioCdDiscModel model, string deviceNode, int index)
        {
            this.model = model;
            this.index_on_disc = index;

            Uri = new SafeUri (String.Format ("cdda://{0}#{1}", index_on_disc + 1, deviceNode));
        }

		public void CopyIfNeeded (IPhoto item, SafeUri destinationBase)
		{
			// remember source uri for copying xmp file
			SafeUri defaultVersionUri = item.DefaultVersion.Uri;

			foreach (IPhotoVersion version in item.Versions) {
				// Copy into photo folder and update IPhotoVersion uri
				var source = version.Uri;
				var destination = destinationBase.Append (source.GetFilename ());
				if (!source.Equals (destination)) {
					destination = GetUniqueFilename (destination);
					file_system.File.Copy (source, destination, false);
					copied_files.Add (destination);
					original_files.Add (source);
					version.Uri = destination;
				}
			}

			// Copy XMP sidecar
			var xmp_original = defaultVersionUri.ReplaceExtension(".xmp");
			if (file_system.File.Exists (xmp_original)) {
				var xmp_destination = item.DefaultVersion.Uri.ReplaceExtension (".xmp");
				file_system.File.Copy (xmp_original, xmp_destination, true);
				copied_files.Add (xmp_destination);
				original_files.Add (xmp_original);
			}
		}

        public DaapTrackInfo(Track track, DaapSource source)
            : base()
        {
            TrackTitle = track.Title;
            AlbumTitle = track.Album;
            ArtistName = track.Artist;

            DateAdded = track.DateAdded;
            DateUpdated = track.DateModified;

            Genre = track.Genre;
            FileSize = track.Size;
            TrackCount = track.TrackCount;
            TrackNumber = track.TrackNumber;
            DiscNumber = track.DiscNumber;
            DiscCount = track.DiscCount;
            Year = track.Year;
            Duration = track.Duration;
            MimeType = track.Format;
            BitRate = (int)track.BitRate;
            ExternalId = track.Id;

            PrimarySource = source;

            Uri = new SafeUri (String.Format (
                "{0}{1}/{2}", DaapService.ProxyServer.HttpBaseAddress, source.Database.GetHashCode (), track.Id
            ));

            //this.IsLive = false;
            //this.CanSaveToDatabase = false;
        }

		public IThumbnailer GetThumbnailerForUri (SafeUri uri)
		{
			if (ImageFile.HasLoader (uri)) {
				return new ImageThumbnailer (uri, fileSystem);
			}
			return null;
		}

		bool CreateThumbnail (SafeUri thumbnailUri, ThumbnailSize size, IImageFile imageFile)
		{
			var pixels = size == ThumbnailSize.Normal ? 128 : 256;
			Pixbuf pixbuf;
			try {
				pixbuf = imageFile.Load ();
			} catch (Exception e) {
				Log.DebugFormat ("Failed loading image for thumbnailing: {0}", imageFile.Uri);
				Log.DebugException (e);
				return false;
			}

			double scale_x = (double)pixbuf.Width / pixels;
			double scale_y = (double)pixbuf.Height / pixels;
			double scale = Math.Max (1.0, Math.Max (scale_x, scale_y));
			// Ensures that the minimum value is 1 so that pixbuf.ScaleSimple doesn't return null
			// Seems to only happen in rare(?) cases
			int target_x = Math.Max ((int)(pixbuf.Width / scale), 1);
			int target_y = Math.Max ((int)(pixbuf.Height / scale), 1);

			var thumb_pixbuf = pixbuf.ScaleSimple (target_x, target_y, InterpType.Bilinear);
			var mtime = fileSystem.File.GetMTime (imageFile.Uri).ToString ();
			thumb_pixbuf.Savev (thumbnailUri.LocalPath, "png",
				new string [] { ThumbnailService.ThumbUriOpt, ThumbnailService.ThumbMTimeOpt, null },
				new string [] { imageFile.Uri, mtime });

			pixbuf.Dispose ();
			thumb_pixbuf.Dispose ();

			return true;
		}

		public void Load (SafeUri uri)
		{
			if (is_disposed)
				return;

			//First, send a thumbnail if we have one
			if ((thumb = App.Instance.Container.Resolve<IThumbnailService> ().TryLoadThumbnail (uri, ThumbnailSize.Large)) != null) {
				pixbuf_orientation = ImageOrientation.TopLeft;
				EventHandler<AreaPreparedEventArgs> prep = AreaPrepared;
				if (prep != null) {
					prep (this, new AreaPreparedEventArgs (true));
				}
				EventHandler<AreaUpdatedEventArgs> upd = AreaUpdated;
				if (upd != null) {
					upd (this, new AreaUpdatedEventArgs (new Rectangle (0, 0, thumb.Width, thumb.Height)));
				}
			}

			using (var image_file = ImageFile.Create (uri)) {
				image_stream = image_file.PixbufStream ();
				pixbuf_orientation = image_file.Orientation;
			}

			loading = true;
			// The ThreadPool.QueueUserWorkItem hack is there cause, as the bytes to read are present in the stream,
			// the Read is CompletedAsynchronously, blocking the mainloop
			image_stream.BeginRead (buffer, 0, count, delegate (IAsyncResult r) {
				ThreadPool.QueueUserWorkItem (delegate {
					HandleReadDone (r);});
			}, null);
		}

 public static string GenerateMD5(SafeUri uri)
 {
     var file = GLib.FileFactory.NewForUri (uri);
     var stream = new GLib.GioStream (file.Read (null));
     var hash = CryptoUtil.Md5EncodeStream (stream);
     stream.Close ();
     return hash;
 }

 public static RadioTrackInfo OpenPlay (SafeUri uri)
 {
     RadioTrackInfo track = Open (uri);
     if (track != null) {
         track.Play ();
     }
     return track;
 }

 public override void CopyTrackTo (DatabaseTrackInfo track, SafeUri uri, BatchUserJob job)
 {
     if (track.PrimarySource == this && track.Uri.Scheme.StartsWith ("http")) {
         foreach (double percent in database.DownloadTrack ((int)track.ExternalId, track.MimeType, uri.AbsolutePath)) {
             job.DetailedProgress = percent;
         }
     }
 }

 public ImageInfo(SafeUri uri)
 {
     using (var img = ImageFile.Create (uri)) {
             Pixbuf pixbuf = img.Load ();
             SetPixbuf (pixbuf);
             pixbuf.Dispose ();
         }
 }

 public long GetSize(SafeUri uri)
 {
     try {
         return new System.IO.FileInfo (uri.LocalPath).Length;
     } catch {
         return -1;
     }
 }

		public void Copy (SafeUri source, SafeUri destination, bool overwrite)
		{
			var source_file = FileFactory.NewForUri (source);
			var destination_file = FileFactory.NewForUri (destination);
			var flags = FileCopyFlags.AllMetadata;
			if (overwrite)
				flags |= FileCopyFlags.Overwrite;
			source_file.Copy (destination_file, flags, null, null);
		}

        public BaseImageFile(SafeUri uri)
        {
            Uri = uri;
            Orientation = ImageOrientation.TopLeft;

            using (var metadata_file = Metadata.Parse (uri)) {
                ExtractMetadata (metadata_file);
            }
        }

        public void TestMissingFile()
        {
            XdgThumbnailSpec.DefaultLoader = (u) => {
                throw new Exception ("not found!");
            };

            var uri = new SafeUri ("file:///invalid");
            var pixbuf = XdgThumbnailSpec.LoadThumbnail (uri, ThumbnailSize.Large);
            Assert.IsNull (pixbuf);
        }