697 lines
20 KiB
C#
697 lines
20 KiB
C#
// TarInputStream.cs
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// Copyright (C) 2001 Mike Krueger
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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 System.Text;
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namespace ICSharpCode.SharpZipLib.Tar {
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public delegate void ProgressMessageHandler(TarArchive archive, TarEntry entry, string message);
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/// <summary>
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/// The TarArchive class implements the concept of a
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/// tar archive. A tar archive is a series of entries, each of
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/// which represents a file system object. Each entry in
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/// the archive consists of a header block. Directory entries
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/// consist only of the header block, and are followed by entries
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/// for the directory's contents. File entries consist of a
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/// header followed by the number of blocks needed to
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/// contain the file's contents. All entries are written on
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/// block boundaries. Blocks are 512 bytes long.
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///
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/// TarArchives are instantiated in either read or write mode,
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/// based upon whether they are instantiated with an InputStream
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/// or an OutputStream. Once instantiated TarArchives read/write
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/// mode can not be changed.
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///
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/// There is currently no support for random access to tar archives.
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/// However, it seems that subclassing TarArchive, and using the
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/// TarBuffer.getCurrentRecordNum() and TarBuffer.getCurrentBlockNum()
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/// methods, this would be rather trvial.
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/// </summary>
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public class TarArchive
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{
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bool verbose;
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bool debug;
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bool keepOldFiles;
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bool asciiTranslate;
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int userId;
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string userName;
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int groupId;
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string groupName;
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string rootPath;
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string pathPrefix;
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int recordSize;
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byte[] recordBuf;
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TarInputStream tarIn;
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TarOutputStream tarOut;
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public event ProgressMessageHandler ProgressMessageEvent;
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protected virtual void OnProgressMessageEvent(TarEntry entry, string message)
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{
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if (ProgressMessageEvent != null) {
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ProgressMessageEvent(this, entry, message);
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}
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}
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protected TarArchive()
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{
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}
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/// <summary>
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/// The InputStream based constructors create a TarArchive for the
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/// purposes of e'x'tracting or lis't'ing a tar archive. Thus, use
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/// these constructors when you wish to extract files from or list
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/// the contents of an existing tar archive.
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/// </summary>
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public static TarArchive CreateInputTarArchive(Stream inputStream)
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{
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return CreateInputTarArchive(inputStream, TarBuffer.DefaultBlockFactor);
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}
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public static TarArchive CreateInputTarArchive(Stream inputStream, int blockFactor)
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{
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TarArchive archive = new TarArchive();
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archive.tarIn = new TarInputStream(inputStream, blockFactor);
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archive.Initialize(blockFactor * TarBuffer.BlockSize);
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return archive;
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}
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/// <summary>
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/// The OutputStream based constructors create a TarArchive for the
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/// purposes of 'c'reating a tar archive. Thus, use these constructors
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/// when you wish to create a new tar archive and write files into it.
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/// </summary>
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public static TarArchive CreateOutputTarArchive(Stream outputStream)
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{
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return CreateOutputTarArchive(outputStream, TarBuffer.DefaultBlockFactor);
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}
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public static TarArchive CreateOutputTarArchive(Stream outputStream, int blockFactor)
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{
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TarArchive archive = new TarArchive();
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archive.tarOut = new TarOutputStream(outputStream, blockFactor);
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archive.Initialize(blockFactor * TarBuffer.BlockSize);
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return archive;
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}
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/// <summary>
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/// Common constructor initialization code.
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/// </summary>
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void Initialize(int recordSize)
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{
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this.recordSize = recordSize;
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this.rootPath = null;
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this.pathPrefix = null;
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// this.tempPath = System.getProperty( "user.dir" );
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this.userId = 0;
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this.userName = String.Empty;
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this.groupId = 0;
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this.groupName = String.Empty;
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this.debug = false;
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this.verbose = false;
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this.keepOldFiles = false;
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this.recordBuf = new byte[RecordSize];
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}
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///
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/// <summary> Set the debugging flag. </summary>
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///
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/// <param name=debugF> The new debug setting. </param>
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public void SetDebug(bool debugF)
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{
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this.debug = debugF;
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if (this.tarIn != null) {
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this.tarIn.SetDebug(debugF);
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}
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if (this.tarOut != null) {
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this.tarOut.SetDebug(debugF);
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}
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}
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/// <summary>
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/// Get/Set the verbosity setting.
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/// </summary>
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public bool IsVerbose {
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get {
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return verbose;
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}
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set {
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verbose = value;
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}
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}
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/// <summary>
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/// Set the flag that determines whether existing files are
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/// kept, or overwritten during extraction.
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/// </summary>
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/// <param name="keepOldFiles">
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/// If true, do not overwrite existing files.
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/// </param>
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public void SetKeepOldFiles(bool keepOldFiles)
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{
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this.keepOldFiles = keepOldFiles;
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}
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/// <summary>
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/// Set the ascii file translation flag. If ascii file translation
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/// is true, then the MIME file type will be consulted to determine
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/// if the file is of type 'text/*'. If the MIME type is not found,
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/// then the TransFileTyper is consulted if it is not null. If
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/// either of these two checks indicates the file is an ascii text
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/// file, it will be translated. The translation converts the local
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/// operating system's concept of line ends into the UNIX line end,
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/// '\n', which is the defacto standard for a TAR archive. This makes
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/// text files compatible with UNIX.
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/// </summary>
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/// <param name= "asciiTranslate">
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/// If true, translate ascii text files.
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/// </param>
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public void SetAsciiTranslation(bool asciiTranslate)
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{
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this.asciiTranslate = asciiTranslate;
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}
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/*
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/// <summary>
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/// Set the object that will determine if a file is of type
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/// ascii text for translation purposes.
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/// </summary>
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/// <param name="transTyper">
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/// The new TransFileTyper object.
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/// </param>
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public void SetTransFileTyper(TarTransFileTyper transTyper)
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{
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this.transTyper = transTyper;
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}
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*/
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/// <summary>
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/// Set user and group information that will be used to fill in the
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/// tar archive's entry headers. Since Java currently provides no means
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/// of determining a user name, user id, group name, or group id for
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/// a given File, TarArchive allows the programmer to specify values
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/// to be used in their place.
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/// </summary>
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/// <param name="userId">
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/// The user Id to use in the headers.
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/// </param>
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/// <param name="userName">
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/// The user name to use in the headers.
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/// </param>
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/// <param name="groupId">
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/// The group id to use in the headers.
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/// </param>
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/// <param name="groupName">
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/// The group name to use in the headers.
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/// </param>
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public void SetUserInfo(int userId, string userName, int groupId, string groupName)
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{
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this.userId = userId;
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this.userName = userName;
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this.groupId = groupId;
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this.groupName = groupName;
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}
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/// <summary>
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/// Get the user id being used for archive entry headers.
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/// </summary>
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/// <returns>
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/// The current user id.
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/// </returns>
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public int UserId {
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get {
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return this.userId;
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}
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}
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/// <summary>
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/// Get the user name being used for archive entry headers.
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/// </summary>
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/// <returns>
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/// The current user name.
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/// </returns>
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public string UserName {
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get {
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return this.userName;
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}
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}
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/// <summary>
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/// Get the group id being used for archive entry headers.
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/// </summary>
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/// <returns>
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/// The current group id.
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/// </returns>
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public int GroupId {
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get {
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return this.groupId;
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}
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}
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/// <summary>
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/// Get the group name being used for archive entry headers.
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/// </summary>
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/// <returns>
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/// The current group name.
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/// </returns>
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public string GroupName {
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get {
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return this.groupName;
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}
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}
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/// <summary>
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/// Get the archive's record size. Because of its history, tar
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/// supports the concept of buffered IO consisting of RECORDS of
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/// BLOCKS. This allowed tar to match the IO characteristics of
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/// the physical device being used. Of course, in the Java world,
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/// this makes no sense, WITH ONE EXCEPTION - archives are expected
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/// to be properly "blocked". Thus, all of the horrible TarBuffer
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/// support boils down to simply getting the "boundaries" correct.
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/// </summary>
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/// <returns>
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/// The record size this archive is using.
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/// </returns>
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public int RecordSize {
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get {
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if (this.tarIn != null) {
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return this.tarIn.GetRecordSize();
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}
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else if (this.tarOut != null) {
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return this.tarOut.GetRecordSize();
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}
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return TarBuffer.DefaultRecordSize;
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}
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}
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/// <summary>
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/// Close the archive. This simply calls the underlying
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/// tar stream's close() method.
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/// </summary>
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public void CloseArchive()
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{
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if (this.tarIn != null) {
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this.tarIn.Close();
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}
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else if (this.tarOut != null) {
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this.tarOut.Flush();
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this.tarOut.Close();
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}
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}
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/// <summary>
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/// Perform the "list" command and list the contents of the archive.
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///
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/// NOTE That this method uses the progress display to actually list
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/// the conents. If the progress display is not set, nothing will be
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/// listed!
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/// </summary>
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public void ListContents()
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{
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while (true) {
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TarEntry entry = this.tarIn.GetNextEntry();
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if (entry == null) {
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if (this.debug) {
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Console.Error.WriteLine("READ EOF BLOCK");
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}
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break;
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}
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OnProgressMessageEvent(entry, null);
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}
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}
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/// <summary>
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/// Perform the "extract" command and extract the contents of the archive.
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/// </summary>
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/// <param name="destDir">
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/// The destination directory into which to extract.
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/// </param>
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public void ExtractContents(string destDir)
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{
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while (true) {
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TarEntry entry = this.tarIn.GetNextEntry();
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if (entry == null) {
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if (this.debug) {
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Console.Error.WriteLine("READ EOF BLOCK");
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}
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break;
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}
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this.ExtractEntry(destDir, entry);
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}
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}
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void EnsureDirectoryExists(string directoryName)
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{
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if (!Directory.Exists(directoryName)) {
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try {
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Directory.CreateDirectory(directoryName);
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}
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catch (Exception e) {
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throw new IOException("error making directory path '" + directoryName + "', " + e.Message);
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}
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}
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}
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// TODO -jr- No longer reads entire file into memory but is still a weak test!
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bool IsBinary(string filename)
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{
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FileStream fs = File.OpenRead(filename);
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int sampleSize = System.Math.Min(4096, (int)fs.Length);
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byte[] content = new byte[sampleSize];
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fs.Read(content, 0, sampleSize);
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fs.Close();
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// assume that ascii 0 or
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// ascii 255 are only found in non text files.
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// and that all non text files contain 0 and 255
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foreach (byte b in content) {
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if (b == 0 || b == 255) {
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return true;
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}
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}
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return false;
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}
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/// <summary>
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/// Extract an entry from the archive. This method assumes that the
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/// tarIn stream has been properly set with a call to getNextEntry().
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/// </summary>
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/// <param name="destDir">
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/// The destination directory into which to extract.
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/// </param>
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/// <param name="entry">
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/// The TarEntry returned by tarIn.getNextEntry().
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/// </param>
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void ExtractEntry(string destDir, TarEntry entry)
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{
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if (this.verbose) {
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OnProgressMessageEvent(entry, null);
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}
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string name = entry.Name;
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name = name.Replace('/', Path.DirectorySeparatorChar);
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if (!destDir.EndsWith(Path.DirectorySeparatorChar.ToString())) {
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destDir += Path.DirectorySeparatorChar;
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}
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string destFile = destDir + name;
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if (entry.IsDirectory) {
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EnsureDirectoryExists(destFile);
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}
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else {
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string parentDirectory = Path.GetDirectoryName(destFile);
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EnsureDirectoryExists(parentDirectory);
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if (this.keepOldFiles && File.Exists(destFile)) {
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if (this.verbose) {
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OnProgressMessageEvent(entry, "Destination file already exists");
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}
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}
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else {
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bool asciiTrans = false;
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Stream outputStream = File.Create(destFile);
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if (this.asciiTranslate) {
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asciiTrans = !IsBinary(destFile);
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// original java sourcecode :
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// MimeType mime = null;
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// string contentType = null;
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// try {
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// contentType = FileTypeMap.getDefaultFileTypeMap().getContentType( destFile );
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//
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// mime = new MimeType(contentType);
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//
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// if (mime.getPrimaryType().equalsIgnoreCase( "text" )) {
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// asciiTrans = true;
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// } else if ( this.transTyper != null ) {
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// if ( this.transTyper.isAsciiFile( entry.getName() ) ) {
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// asciiTrans = true;
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// }
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// }
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// } catch (MimeTypeParseException ex) {
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// }
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//
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// if (this.debug) {
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// Console.Error.WriteLine(("EXTRACT TRANS? '" + asciiTrans + "' ContentType='" + contentType + "' PrimaryType='" + mime.getPrimaryType() + "'" );
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// }
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}
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StreamWriter outw = null;
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if (asciiTrans) {
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outw = new StreamWriter(outputStream);
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}
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byte[] rdbuf = new byte[32 * 1024];
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while (true) {
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int numRead = this.tarIn.Read(rdbuf, 0, rdbuf.Length);
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if (numRead <= 0) {
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break;
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}
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if (asciiTrans) {
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for (int off = 0, b = 0; b < numRead; ++b) {
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if (rdbuf[b] == 10) {
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string s = Encoding.ASCII.GetString(rdbuf, off, (b - off));
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outw.WriteLine(s);
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off = b + 1;
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}
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}
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}
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else {
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outputStream.Write(rdbuf, 0, numRead);
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}
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}
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if (asciiTrans) {
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outw.Close();
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}
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else {
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outputStream.Close();
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}
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}
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}
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}
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/// <summary>
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/// Write an entry to the archive. This method will call the putNextEntry
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/// and then write the contents of the entry, and finally call closeEntry()()
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/// for entries that are files. For directories, it will call putNextEntry(),
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/// and then, if the recurse flag is true, process each entry that is a
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/// child of the directory.
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/// </summary>
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/// <param name="entry">
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/// The TarEntry representing the entry to write to the archive.
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/// </param>
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/// <param name="recurse">
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/// If true, process the children of directory entries.
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/// </param>
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public void WriteEntry(TarEntry entry, bool recurse)
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{
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bool asciiTrans = false;
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string tempFileName = null;
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string eFile = entry.File;
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// Work on a copy of the entry so we can manipulate it.
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// Note that we must distinguish how the entry was constructed.
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//
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if (eFile == null || eFile.Length == 0) {
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entry = TarEntry.CreateTarEntry(entry.Name);
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}
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else {
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//
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// The user may have explicitly set the entry's name to
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// something other than the file's path, so we must save
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// and restore it. This should work even when the name
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// was set from the File's name.
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//
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string saveName = entry.Name;
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entry = TarEntry.CreateEntryFromFile(eFile);
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entry.Name = saveName;
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}
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if (this.verbose) {
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OnProgressMessageEvent(entry, null);
|
|
}
|
|
|
|
if (this.asciiTranslate && !entry.IsDirectory) {
|
|
asciiTrans = !IsBinary(eFile);
|
|
|
|
// original java source :
|
|
// MimeType mime = null;
|
|
// string contentType = null;
|
|
//
|
|
// try {
|
|
// contentType = FileTypeMap.getDefaultFileTypeMap(). getContentType( eFile );
|
|
//
|
|
// mime = new MimeType( contentType );
|
|
//
|
|
// if ( mime.getPrimaryType().
|
|
// equalsIgnoreCase( "text" ) )
|
|
// {
|
|
// asciiTrans = true;
|
|
// }
|
|
// else if ( this.transTyper != null )
|
|
// {
|
|
// if ( this.transTyper.isAsciiFile( eFile ) )
|
|
// {
|
|
// asciiTrans = true;
|
|
// }
|
|
// }
|
|
// } catch ( MimeTypeParseException ex )
|
|
// {
|
|
// // IGNORE THIS ERROR...
|
|
// }
|
|
//
|
|
// if (this.debug) {
|
|
// Console.Error.WriteLine("CREATE TRANS? '" + asciiTrans + "' ContentType='" + contentType + "' PrimaryType='" + mime.getPrimaryType()+ "'" );
|
|
// }
|
|
|
|
if (asciiTrans) {
|
|
tempFileName = Path.GetTempFileName();
|
|
|
|
StreamReader inStream = File.OpenText(eFile);
|
|
Stream outStream = new BufferedStream(File.Create(tempFileName));
|
|
|
|
while (true) {
|
|
string line = inStream.ReadLine();
|
|
if (line == null) {
|
|
break;
|
|
}
|
|
byte[] data = Encoding.ASCII.GetBytes(line);
|
|
outStream.Write(data, 0, data.Length);
|
|
outStream.WriteByte((byte)'\n');
|
|
}
|
|
|
|
inStream.Close();
|
|
|
|
outStream.Flush();
|
|
outStream.Close();
|
|
|
|
entry.Size = new FileInfo(tempFileName).Length;
|
|
|
|
eFile = tempFileName;
|
|
}
|
|
}
|
|
|
|
string newName = null;
|
|
|
|
if (this.rootPath != null) {
|
|
if (entry.Name.StartsWith(this.rootPath)) {
|
|
newName = entry.Name.Substring(this.rootPath.Length + 1 );
|
|
}
|
|
}
|
|
|
|
if (this.pathPrefix != null) {
|
|
newName = (newName == null) ? this.pathPrefix + "/" + entry.Name : this.pathPrefix + "/" + newName;
|
|
}
|
|
|
|
if (newName != null) {
|
|
entry.Name = newName;
|
|
}
|
|
|
|
this.tarOut.PutNextEntry(entry);
|
|
|
|
if (entry.IsDirectory) {
|
|
if (recurse) {
|
|
TarEntry[] list = entry.GetDirectoryEntries();
|
|
for (int i = 0; i < list.Length; ++i) {
|
|
this.WriteEntry(list[i], recurse);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
Stream inputStream = File.OpenRead(eFile);
|
|
int numWritten = 0;
|
|
byte[] eBuf = new byte[32 * 1024];
|
|
while (true) {
|
|
int numRead = inputStream.Read(eBuf, 0, eBuf.Length);
|
|
|
|
if (numRead <=0) {
|
|
break;
|
|
}
|
|
|
|
this.tarOut.Write(eBuf, 0, numRead);
|
|
numWritten += numRead;
|
|
}
|
|
|
|
// Console.WriteLine("written " + numWritten + " bytes");
|
|
|
|
inputStream.Close();
|
|
|
|
if (tempFileName != null && tempFileName.Length > 0) {
|
|
File.Delete(tempFileName);
|
|
}
|
|
|
|
this.tarOut.CloseEntry();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* The original Java file had this header:
|
|
** Authored by Timothy Gerard Endres
|
|
** <mailto:time@gjt.org> <http://www.trustice.com>
|
|
**
|
|
** This work has been placed into the public domain.
|
|
** You may use this work in any way and for any purpose you wish.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
|
|
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
|
|
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
|
|
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
|
|
** REDISTRIBUTION OF THIS SOFTWARE.
|
|
**
|
|
*/
|