731 lines
24 KiB
C#
731 lines
24 KiB
C#
// FastZip.cs
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//
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// Copyright 2005 John Reilly
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// Linking this library statically or dynamically with other modules is
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// making a combined work based on this library. Thus, the terms and
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// conditions of the GNU General Public License cover the whole
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// combination.
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//
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// As a special exception, the copyright holders of this library give you
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// permission to link this library with independent modules to produce an
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// executable, regardless of the license terms of these independent
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// modules, and to copy and distribute the resulting executable under
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// terms of your choice, provided that you also meet, for each linked
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// independent module, the terms and conditions of the license of that
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// module. An independent module is a module which is not derived from
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// or based on this library. If you modify this library, you may extend
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// this exception to your version of the library, but you are not
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// obligated to do so. If you do not wish to do so, delete this
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// exception statement from your version.
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using System;
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using System.IO;
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using ICSharpCode.SharpZipLib.Core;
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using ICSharpCode.SharpZipLib.Zip1;
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namespace ICSharpCode.SharpZipLib.Zip
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{
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/// <summary>
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/// FastZipEvents supports all events applicable to <see cref="FastZip">FastZip</see> operations.
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/// </summary>
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public class FastZipEvents
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{
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/// <summary>
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/// Delegate to invoke when processing directories.
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/// </summary>
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public ProcessDirectoryHandler ProcessDirectory;
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/// <summary>
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/// Delegate to invoke when processing files.
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/// </summary>
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public ProcessFileHandler ProcessFile;
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/// <summary>
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/// Delegate to invoke during processing of files.
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/// </summary>
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public ProgressHandler Progress;
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/// <summary>
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/// Delegate to invoke when processing for a file has been completed.
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/// </summary>
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public CompletedFileHandler CompletedFile;
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/// <summary>
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/// Delegate to invoke when processing directory failures.
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/// </summary>
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public DirectoryFailureHandler DirectoryFailure;
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/// <summary>
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/// Delegate to invoke when processing file failures.
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/// </summary>
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public FileFailureHandler FileFailure;
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/// <summary>
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/// Raise the <see cref="DirectoryFailure">directory failure</see> event.
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/// </summary>
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/// <param name="directory">The directory causing the failure.</param>
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/// <param name="e">The exception for this event.</param>
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/// <returns>A boolean indicating if execution should continue or not.</returns>
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public bool OnDirectoryFailure(string directory, Exception e)
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{
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bool result = false;
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DirectoryFailureHandler handler = DirectoryFailure;
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if ( handler != null ) {
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ScanFailureEventArgs args = new ScanFailureEventArgs(directory, e);
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handler(this, args);
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result = args.ContinueRunning;
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}
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return result;
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}
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/// <summary>
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/// Fires the <see cref="FileFailure"> file failure handler delegate</see>.
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/// </summary>
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/// <param name="file">The file causing the failure.</param>
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/// <param name="e">The exception for this failure.</param>
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/// <returns>A boolean indicating if execution should continue or not.</returns>
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public bool OnFileFailure(string file, Exception e)
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{
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FileFailureHandler handler = FileFailure;
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bool result = (handler != null);
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if ( result ) {
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ScanFailureEventArgs args = new ScanFailureEventArgs(file, e);
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handler(this, args);
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result = args.ContinueRunning;
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}
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return result;
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}
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/// <summary>
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/// Fires the <see cref="ProcessFile">ProcessFile delegate</see>.
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/// </summary>
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/// <param name="file">The file being processed.</param>
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/// <returns>A boolean indicating if execution should continue or not.</returns>
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public bool OnProcessFile(string file)
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{
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bool result = true;
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ProcessFileHandler handler = ProcessFile;
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if ( handler != null ) {
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ScanEventArgs args = new ScanEventArgs(file);
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handler(this, args);
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result = args.ContinueRunning;
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}
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return result;
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}
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/// <summary>
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/// Fires the <see cref="CompletedFile"/> delegate
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/// </summary>
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/// <param name="file">The file whose processing has been completed.</param>
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/// <returns>A boolean indicating if execution should continue or not.</returns>
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public bool OnCompletedFile(string file)
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{
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bool result = true;
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CompletedFileHandler handler = CompletedFile;
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if ( handler != null ) {
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ScanEventArgs args = new ScanEventArgs(file);
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handler(this, args);
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result = args.ContinueRunning;
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}
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return result;
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}
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/// <summary>
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/// Fires the <see cref="ProcessDirectory">process directory</see> delegate.
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/// </summary>
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/// <param name="directory">The directory being processed.</param>
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/// <param name="hasMatchingFiles">Flag indicating if the directory has matching files as determined by the current filter.</param>
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/// <returns>A <see cref="bool"/> of true if the operation should continue; false otherwise.</returns>
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public bool OnProcessDirectory(string directory, bool hasMatchingFiles)
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{
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bool result = true;
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ProcessDirectoryHandler handler = ProcessDirectory;
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if ( handler != null ) {
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DirectoryEventArgs args = new DirectoryEventArgs(directory, hasMatchingFiles);
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handler(this, args);
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result = args.ContinueRunning;
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}
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return result;
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}
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/// <summary>
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/// The minimum timespan between <see cref="Progress"/> events.
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/// </summary>
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/// <value>The minimum period of time between <see cref="Progress"/> events.</value>
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/// <seealso cref="Progress"/>
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/// <remarks>The default interval is three seconds.</remarks>
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public TimeSpan ProgressInterval
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{
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get { return progressInterval_; }
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set { progressInterval_ = value; }
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}
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#region Instance Fields
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TimeSpan progressInterval_ = TimeSpan.FromSeconds(3);
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#endregion
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}
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/// <summary>
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/// FastZip provides facilities for creating and extracting zip files.
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/// </summary>
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public class FastZip
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{
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#region Enumerations
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/// <summary>
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/// Defines the desired handling when overwriting files during extraction.
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/// </summary>
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public enum Overwrite
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{
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/// <summary>
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/// Prompt the user to confirm overwriting
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/// </summary>
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Prompt,
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/// <summary>
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/// Never overwrite files.
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/// </summary>
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Never,
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/// <summary>
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/// Always overwrite files.
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/// </summary>
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Always
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Initialise a default instance of <see cref="FastZip"/>.
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/// </summary>
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public FastZip()
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{
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}
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/// <summary>
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/// Initialise a new instance of <see cref="FastZip"/>
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/// </summary>
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/// <param name="events">The <see cref="FastZipEvents">events</see> to use during operations.</param>
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public FastZip(FastZipEvents events)
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{
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events_ = events;
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}
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#endregion
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#region Properties
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/// <summary>
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/// Get/set a value indicating wether empty directories should be created.
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/// </summary>
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public bool CreateEmptyDirectories
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{
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get { return createEmptyDirectories_; }
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set { createEmptyDirectories_ = value; }
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}
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#if !NETCF_1_0
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/// <summary>
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/// Get / set the password value.
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/// </summary>
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public string Password
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{
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get { return password_; }
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set { password_ = value; }
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}
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#endif
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/// <summary>
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/// Get or set the <see cref="INameTransform"></see> active when creating Zip files.
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/// </summary>
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/// <seealso cref="EntryFactory"></seealso>
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public INameTransform NameTransform
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{
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get { return entryFactory_.NameTransform; }
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set {
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entryFactory_.NameTransform = value;
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}
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}
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/// <summary>
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/// Get or set the <see cref="IEntryFactory"></see> active when creating Zip files.
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/// </summary>
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public IEntryFactory EntryFactory
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{
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get { return entryFactory_; }
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set {
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if ( value == null ) {
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entryFactory_ = new ZipEntryFactory();
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}
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else {
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entryFactory_ = value;
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}
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}
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}
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/// <summary>
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/// Gets or sets the setting for <see cref="UseZip64">Zip64 handling when writing.</see>
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/// </summary>
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/// <remarks>
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/// The default value is dynamic which is not backwards compatible with old
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/// programs and can cause problems with XP's built in compression which cant
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/// read Zip64 archives. However it does avoid the situation were a large file
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/// is added and cannot be completed correctly.
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/// NOTE: Setting the size for entries before they are added is the best solution!
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/// By default the EntryFactory used by FastZip will set fhe file size.
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/// </remarks>
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public UseZip64 UseZip64
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{
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get { return useZip64_; }
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set { useZip64_ = value; }
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}
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/// <summary>
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/// Get/set a value indicating wether file dates and times should
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/// be restored when extracting files from an archive.
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/// </summary>
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/// <remarks>The default value is false.</remarks>
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public bool RestoreDateTimeOnExtract
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{
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get {
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return restoreDateTimeOnExtract_;
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}
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set {
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restoreDateTimeOnExtract_ = value;
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}
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}
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/// <summary>
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/// Get/set a value indicating wether file attributes should
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/// be restored during extract operations
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/// </summary>
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public bool RestoreAttributesOnExtract
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{
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get { return restoreAttributesOnExtract_; }
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set { restoreAttributesOnExtract_ = value; }
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}
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#endregion
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#region Delegates
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/// <summary>
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/// Delegate called when confirming overwriting of files.
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/// </summary>
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public delegate bool ConfirmOverwriteDelegate(string fileName);
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#endregion
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#region CreateZip
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/// <summary>
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/// Create a zip file.
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/// </summary>
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/// <param name="zipFileName">The name of the zip file to create.</param>
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/// <param name="sourceDirectory">The directory to source files from.</param>
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/// <param name="recurse">True to recurse directories, false for no recursion.</param>
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/// <param name="fileFilter">The <see cref="PathFilter">file filter</see> to apply.</param>
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/// <param name="directoryFilter">The <see cref="PathFilter">directory filter</see> to apply.</param>
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public void CreateZip(string zipFileName, string sourceDirectory,
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bool recurse, string fileFilter, string directoryFilter)
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{
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CreateZip(File.Create(zipFileName), sourceDirectory, recurse, fileFilter, directoryFilter);
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}
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/// <summary>
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/// Create a zip file/archive.
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/// </summary>
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/// <param name="zipFileName">The name of the zip file to create.</param>
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/// <param name="sourceDirectory">The directory to obtain files and directories from.</param>
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/// <param name="recurse">True to recurse directories, false for no recursion.</param>
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/// <param name="fileFilter">The file filter to apply.</param>
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public void CreateZip(string zipFileName, string sourceDirectory, bool recurse, string fileFilter)
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{
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CreateZip(File.Create(zipFileName), sourceDirectory, recurse, fileFilter, null);
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}
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/// <summary>
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/// Create a zip archive sending output to the <paramref name="outputStream"/> passed.
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/// </summary>
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/// <param name="outputStream">The stream to write archive data to.</param>
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/// <param name="sourceDirectory">The directory to source files from.</param>
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/// <param name="recurse">True to recurse directories, false for no recursion.</param>
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/// <param name="fileFilter">The <see cref="PathFilter">file filter</see> to apply.</param>
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/// <param name="directoryFilter">The <see cref="PathFilter">directory filter</see> to apply.</param>
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/// <remarks>The <paramref name="outputStream"/> is closed after creation.</remarks>
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public void CreateZip(Stream outputStream, string sourceDirectory, bool recurse, string fileFilter, string directoryFilter)
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{
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NameTransform = new ZipNameTransform(sourceDirectory);
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sourceDirectory_ = sourceDirectory;
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using ( outputStream_ = new ZipOutputStream(outputStream) ) {
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#if !NETCF_1_0
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if ( password_ != null ) {
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outputStream_.Password = password_;
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}
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#endif
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outputStream_.UseZip64 = UseZip64;
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FileSystemScanner scanner = new FileSystemScanner(fileFilter, directoryFilter);
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scanner.ProcessFile += new ProcessFileHandler(ProcessFile);
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if ( this.CreateEmptyDirectories ) {
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scanner.ProcessDirectory += new ProcessDirectoryHandler(ProcessDirectory);
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}
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if (events_ != null) {
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if ( events_.FileFailure != null ) {
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scanner.FileFailure += events_.FileFailure;
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}
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if ( events_.DirectoryFailure != null ) {
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scanner.DirectoryFailure += events_.DirectoryFailure;
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}
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}
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scanner.Scan(sourceDirectory, recurse);
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}
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}
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#endregion
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#region ExtractZip
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/// <summary>
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/// Extract the contents of a zip file.
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/// </summary>
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/// <param name="zipFileName">The zip file to extract from.</param>
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/// <param name="targetDirectory">The directory to save extracted information in.</param>
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/// <param name="fileFilter">A filter to apply to files.</param>
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public void ExtractZip(string zipFileName, string targetDirectory, string fileFilter)
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{
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ExtractZip(zipFileName, targetDirectory, Overwrite.Always, null, fileFilter, null, restoreDateTimeOnExtract_);
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}
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/// <summary>
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/// Extract the contents of a zip file.
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/// </summary>
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/// <param name="zipFileName">The zip file to extract from.</param>
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/// <param name="targetDirectory">The directory to save extracted information in.</param>
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/// <param name="overwrite">The style of <see cref="Overwrite">overwriting</see> to apply.</param>
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/// <param name="confirmDelegate">A delegate to invoke when confirming overwriting.</param>
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/// <param name="fileFilter">A filter to apply to files.</param>
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/// <param name="directoryFilter">A filter to apply to directories.</param>
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/// <param name="restoreDateTime">Flag indicating whether to restore the date and time for extracted files.</param>
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public void ExtractZip(string zipFileName, string targetDirectory,
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Overwrite overwrite, ConfirmOverwriteDelegate confirmDelegate,
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string fileFilter, string directoryFilter, bool restoreDateTime)
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{
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Stream inputStream = File.Open(zipFileName, FileMode.Open, FileAccess.Read, FileShare.Read);
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ExtractZip(inputStream, targetDirectory, overwrite, confirmDelegate, fileFilter, directoryFilter, restoreDateTime, true);
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}
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/// <summary>
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/// Extract the contents of a zip file held in a stream.
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/// </summary>
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/// <param name="inputStream">The seekable input stream containing the zip to extract from.</param>
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/// <param name="targetDirectory">The directory to save extracted information in.</param>
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/// <param name="overwrite">The style of <see cref="Overwrite">overwriting</see> to apply.</param>
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/// <param name="confirmDelegate">A delegate to invoke when confirming overwriting.</param>
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/// <param name="fileFilter">A filter to apply to files.</param>
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/// <param name="directoryFilter">A filter to apply to directories.</param>
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/// <param name="restoreDateTime">Flag indicating whether to restore the date and time for extracted files.</param>
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/// <param name="isStreamOwner">Flag indicating whether the inputStream will be closed by this method.</param>
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public void ExtractZip(Stream inputStream, string targetDirectory,
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Overwrite overwrite, ConfirmOverwriteDelegate confirmDelegate,
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string fileFilter, string directoryFilter, bool restoreDateTime,
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bool isStreamOwner)
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{
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if ((overwrite == Overwrite.Prompt) && (confirmDelegate == null)) {
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throw new ArgumentNullException("confirmDelegate");
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}
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continueRunning_ = true;
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overwrite_ = overwrite;
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confirmDelegate_ = confirmDelegate;
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extractNameTransform_ = new WindowsNameTransform(targetDirectory);
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fileFilter_ = new NameFilter(fileFilter);
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directoryFilter_ = new NameFilter(directoryFilter);
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restoreDateTimeOnExtract_ = restoreDateTime;
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using (zipFile_ = new ZipFile(inputStream)) {
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#if !NETCF_1_0
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if (password_ != null) {
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zipFile_.Password = password_;
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}
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#endif
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zipFile_.IsStreamOwner = isStreamOwner;
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System.Collections.IEnumerator enumerator = zipFile_.GetEnumerator();
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while (continueRunning_ && enumerator.MoveNext()) {
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ZipEntry entry = (ZipEntry)enumerator.Current;
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if (entry.IsFile)
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{
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// TODO Path.GetDirectory can fail here on invalid characters.
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if (directoryFilter_.IsMatch(Path.GetDirectoryName(entry.Name)) && fileFilter_.IsMatch(entry.Name)) {
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ExtractEntry(entry);
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}
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}
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else if (entry.IsDirectory) {
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if (directoryFilter_.IsMatch(entry.Name) && CreateEmptyDirectories) {
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ExtractEntry(entry);
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}
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}
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else {
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// Do nothing for volume labels etc...
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}
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}
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}
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}
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#endregion
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#region Internal Processing
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void ProcessDirectory(object sender, DirectoryEventArgs e)
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{
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if ( !e.HasMatchingFiles && CreateEmptyDirectories ) {
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if ( events_ != null ) {
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events_.OnProcessDirectory(e.Name, e.HasMatchingFiles);
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}
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if ( e.ContinueRunning ) {
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if (e.Name != sourceDirectory_) {
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ZipEntry entry = entryFactory_.MakeDirectoryEntry(e.Name);
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outputStream_.PutNextEntry(entry);
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}
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}
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}
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}
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void ProcessFile(object sender, ScanEventArgs e)
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{
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if ( (events_ != null) && (events_.ProcessFile != null) ) {
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events_.ProcessFile(sender, e);
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}
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if ( e.ContinueRunning ) {
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try {
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// The open below is equivalent to OpenRead which gaurantees that if opened the
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// file will not be changed by subsequent openers, but precludes opening in some cases
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// were it could succeed.
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using (FileStream stream = File.Open(e.Name, FileMode.Open, FileAccess.Read, FileShare.Read)) {
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ZipEntry entry = entryFactory_.MakeFileEntry(e.Name);
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outputStream_.PutNextEntry(entry);
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AddFileContents(e.Name, stream);
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}
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}
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catch(Exception ex) {
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if (events_ != null) {
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continueRunning_ = events_.OnFileFailure(e.Name, ex);
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}
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else {
|
|
continueRunning_ = false;
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void AddFileContents(string name, Stream stream)
|
|
{
|
|
if( stream==null ) {
|
|
throw new ArgumentNullException("stream");
|
|
}
|
|
|
|
if( buffer_==null ) {
|
|
buffer_=new byte[4096];
|
|
}
|
|
|
|
if( (events_!=null)&&(events_.Progress!=null) ) {
|
|
StreamUtils.Copy(stream, outputStream_, buffer_,
|
|
events_.Progress, events_.ProgressInterval, this, name);
|
|
}
|
|
else {
|
|
StreamUtils.Copy(stream, outputStream_, buffer_);
|
|
}
|
|
|
|
if( events_!=null ) {
|
|
continueRunning_=events_.OnCompletedFile(name);
|
|
}
|
|
}
|
|
|
|
void ExtractFileEntry(ZipEntry entry, string targetName)
|
|
{
|
|
bool proceed = true;
|
|
if ( overwrite_ != Overwrite.Always ) {
|
|
if ( File.Exists(targetName) ) {
|
|
if ( (overwrite_ == Overwrite.Prompt) && (confirmDelegate_ != null) ) {
|
|
proceed = confirmDelegate_(targetName);
|
|
}
|
|
else {
|
|
proceed = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( proceed ) {
|
|
if ( events_ != null ) {
|
|
continueRunning_ = events_.OnProcessFile(entry.Name);
|
|
}
|
|
|
|
if ( continueRunning_ ) {
|
|
try {
|
|
using ( FileStream outputStream = File.Create(targetName) ) {
|
|
if ( buffer_ == null ) {
|
|
buffer_ = new byte[4096];
|
|
}
|
|
if ((events_ != null) && (events_.Progress != null))
|
|
{
|
|
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_,
|
|
events_.Progress, events_.ProgressInterval, this, entry.Name, entry.Size);
|
|
}
|
|
else
|
|
{
|
|
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_);
|
|
}
|
|
|
|
if (events_ != null) {
|
|
continueRunning_ = events_.OnCompletedFile(entry.Name);
|
|
}
|
|
}
|
|
|
|
#if !NETCF_1_0 && !NETCF_2_0
|
|
if ( restoreDateTimeOnExtract_ ) {
|
|
File.SetLastWriteTime(targetName, entry.DateTime);
|
|
}
|
|
|
|
if ( RestoreAttributesOnExtract && entry.IsDOSEntry && (entry.ExternalFileAttributes != -1)) {
|
|
FileAttributes fileAttributes = (FileAttributes) entry.ExternalFileAttributes;
|
|
// TODO: FastZip - Setting of other file attributes on extraction is a little trickier.
|
|
fileAttributes &= (FileAttributes.Archive | FileAttributes.Normal | FileAttributes.ReadOnly | FileAttributes.Hidden);
|
|
File.SetAttributes(targetName, fileAttributes);
|
|
}
|
|
#endif
|
|
}
|
|
catch(Exception ex) {
|
|
if ( events_ != null ) {
|
|
continueRunning_ = events_.OnFileFailure(targetName, ex);
|
|
}
|
|
else {
|
|
continueRunning_ = false;
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void ExtractEntry(ZipEntry entry)
|
|
{
|
|
bool doExtraction = entry.IsCompressionMethodSupported();
|
|
string targetName = entry.Name;
|
|
|
|
if ( doExtraction ) {
|
|
if ( entry.IsFile ) {
|
|
targetName = extractNameTransform_.TransformFile(targetName);
|
|
}
|
|
else if ( entry.IsDirectory ) {
|
|
targetName = extractNameTransform_.TransformDirectory(targetName);
|
|
}
|
|
|
|
doExtraction = !((targetName == null) || (targetName.Length == 0));
|
|
}
|
|
|
|
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
|
|
|
|
string dirName = null;
|
|
|
|
if ( doExtraction ) {
|
|
if ( entry.IsDirectory ) {
|
|
dirName = targetName;
|
|
}
|
|
else {
|
|
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
|
|
}
|
|
}
|
|
|
|
if ( doExtraction && !Directory.Exists(dirName) ) {
|
|
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
|
|
try {
|
|
Directory.CreateDirectory(dirName);
|
|
}
|
|
catch (Exception ex) {
|
|
doExtraction = false;
|
|
if ( events_ != null ) {
|
|
if ( entry.IsDirectory ) {
|
|
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
|
|
}
|
|
else {
|
|
continueRunning_ = events_.OnFileFailure(targetName, ex);
|
|
}
|
|
}
|
|
else {
|
|
continueRunning_ = false;
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( doExtraction && entry.IsFile ) {
|
|
ExtractFileEntry(entry, targetName);
|
|
}
|
|
}
|
|
|
|
static int MakeExternalAttributes(FileInfo info)
|
|
{
|
|
return (int)info.Attributes;
|
|
}
|
|
|
|
#if NET_1_0 || NET_1_1 || NETCF_1_0
|
|
static bool NameIsValid(string name)
|
|
{
|
|
return (name != null) &&
|
|
(name.Length > 0) &&
|
|
(name.IndexOfAny(Path.InvalidPathChars) < 0);
|
|
}
|
|
#else
|
|
static bool NameIsValid(string name)
|
|
{
|
|
return (name != null) &&
|
|
(name.Length > 0) &&
|
|
(name.IndexOfAny(Path.GetInvalidPathChars()) < 0);
|
|
}
|
|
#endif
|
|
#endregion
|
|
|
|
#region Instance Fields
|
|
bool continueRunning_;
|
|
byte[] buffer_;
|
|
ZipOutputStream outputStream_;
|
|
ZipFile zipFile_;
|
|
string sourceDirectory_;
|
|
NameFilter fileFilter_;
|
|
NameFilter directoryFilter_;
|
|
Overwrite overwrite_;
|
|
ConfirmOverwriteDelegate confirmDelegate_;
|
|
|
|
bool restoreDateTimeOnExtract_;
|
|
bool restoreAttributesOnExtract_;
|
|
bool createEmptyDirectories_;
|
|
FastZipEvents events_;
|
|
IEntryFactory entryFactory_ = new ZipEntryFactory();
|
|
INameTransform extractNameTransform_;
|
|
UseZip64 useZip64_=UseZip64.Dynamic;
|
|
|
|
#if !NETCF_1_0
|
|
string password_;
|
|
#endif
|
|
|
|
#endregion
|
|
}
|
|
}
|