99 lines
3.0 KiB
C#
99 lines
3.0 KiB
C#
// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
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//
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// Authors:
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// Chris Toshok (toshok@ximian.com)
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//
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using System;
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using System.IO;
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using zipsharp;
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namespace System.IO.Packaging {
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public sealed class ZipPackagePart : PackagePart
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{
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new ZipPackage Package {
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get { return (ZipPackage)base.Package; }
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}
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internal ZipPackagePart (Package package, Uri partUri)
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: base (package, partUri)
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{
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}
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internal ZipPackagePart (Package package, Uri partUri, string contentType)
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: base (package, partUri, contentType)
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{
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}
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internal ZipPackagePart (Package package, Uri partUri, string contentType, CompressionOption compressionOption )
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: base (package, partUri, contentType, compressionOption)
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{
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}
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protected override Stream GetStreamCore (FileMode mode, FileAccess access)
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{
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ZipPartStream zps;
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MemoryStream stream;
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if (Package.PartStreams.TryGetValue (Uri, out stream)) {
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zps = new ZipPartStream (Package, stream, access);
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if (mode == FileMode.Create)
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stream.SetLength (0);
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return new ZipPartStream (Package, stream, access);
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}
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stream = new MemoryStream ();
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try
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{
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using (UnzipArchive archive = new UnzipArchive (Package.PackageStream)) {
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foreach (string file in archive.GetFiles ()) {
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if (file != Uri.ToString ().Substring (1))
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continue;
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using (Stream archiveStream = archive.GetStream (file)) {
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int read = 0;
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byte[] buffer = new byte [Math.Min (archiveStream.Length, 2 * 1024)];
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while ((read = archiveStream.Read (buffer, 0, buffer.Length)) != 0)
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stream.Write (buffer, 0, read);
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}
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}
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}
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}
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catch
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{
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// The zipfile is invalid, so just create the file
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// as if it didn't exist
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stream.SetLength (0);
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}
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Package.PartStreams.Add (Uri, stream);
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if (mode == FileMode.Create)
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stream.SetLength (0);
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return new ZipPartStream (Package, stream, access);
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}
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}
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}
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