C# ISharpZipLib 压缩/解压缩zip文件

2023-01-22 08:29:17

SharpZipLib: recursively zip/unzip directory structure

001 // Project: Salient 002 // http://salient.codeplex.com 003 // 004 // Copyright 2010, Sky Sanders <sky at skysanders.net> 005 // Dual licensed under the MIT or GPL Version 2 licenses. 006 // http://salient.codeplex.com/license 007 //  008 // Date: May 24 2010 009   010 #region 011   012 using System; 013 using System.Collections.Generic; 014 using System.IO; 015 using System.Linq; 016 using ICSharpCode.SharpZipLib.Zip; 017   018 #endregion 019   020 namespace Salient.IO.Compression 021 { 022     public static class DirectoryCompression 023     { 024         public static void CompressDirectory(this Stream target, string sourcePath, 025                                              Func<string, bool> excludeFromCompression) 026         { 027             sourcePath = Path.GetFullPath(sourcePath); 028   029             string parentDirectory = Path.GetDirectoryName(sourcePath); 030   031             int trimOffset = (string.IsNullOrEmpty(parentDirectory) 032                                   ? Path.GetPathRoot(sourcePath).Length 033                                   : parentDirectory.Length); 034   035   036             List<string> fileSystemEntries = new List<string>(); 037   038             fileSystemEntries 039                 .AddRange(Directory.GetDirectories(sourcePath, "*", SearchOption.AllDirectories) 040                               .Select(d => d + "\\")); 041   042             fileSystemEntries 043                 .AddRange(Directory.GetFiles(sourcePath, "*", SearchOption.AllDirectories)); 044   045   046             using (ZipOutputStream compressor = new ZipOutputStream(target)) 047             { 048                 compressor.SetLevel(9); 049   050                 foreach (string filePath in fileSystemEntries) 051                 { 052                     if (excludeFromCompression(filePath)) 053                     { 054                         continue; 055                     } 056   057                     compressor.PutNextEntry(new ZipEntry(filePath.Substring(trimOffset))); 058   059                     if (filePath.EndsWith(@"\")) 060                     { 061                         continue; 062                     } 063   064                     byte[] data = new byte[2048]; 065   066                     using (FileStream input = File.OpenRead(filePath)) 067                     { 068                         int bytesRead; 069   070                         while ((bytesRead = input.Read(data, 0, data.Length)) > 0) 071                         { 072                             compressor.Write(data, 0, bytesRead); 073                         } 074                     } 075                 } 076   077                 compressor.Finish(); 078             } 079         } 080   081   082         public static void DecompressToDirectory(this Stream source, string targetPath, string pwd, 083                                                  Func<string, bool> excludeFromDecompression) 084         { 085             targetPath = Path.GetFullPath(targetPath); 086   087             using (ZipInputStream decompressor = new ZipInputStream(source)) 088             { 089                 if (!string.IsNullOrEmpty(pwd)) 090                 { 091                     decompressor.Password = pwd; 092                 } 093   094                 ZipEntry entry; 095   096                 while ((entry = decompressor.GetNextEntry()) != null) 097                 { 098                     if (excludeFromDecompression(entry.Name)) 099                     { 100                         continue; 101                     } 102   103                     string filePath = Path.Combine(targetPath, entry.Name); 104   105                     string directoryPath = Path.GetDirectoryName(filePath); 106   107   108                     if (!string.IsNullOrEmpty(directoryPath) && !Directory.Exists(directoryPath)) 109                     { 110                         Directory.CreateDirectory(directoryPath); 111                     } 112   113                     if (entry.IsDirectory) 114                     { 115                         continue; 116                     } 117   118                     byte[] data = new byte[2048]; 119                     using (FileStream streamWriter = File.Create(filePath)) 120                     { 121                         int bytesRead; 122                         while ((bytesRead = decompressor.Read(data, 0, data.Length)) > 0) 123                         { 124                             streamWriter.Write(data, 0, bytesRead); 125                         } 126                     } 127                 } 128             } 129         } 130     } 131 }

Usage

 

01 using System; 02 using System.IO; 03 using NUnit.Framework; 04 using Salient.IO.Compression; 05   06 namespace CoreFiveConnector.Tests 07 { 08     [TestFixture] 09     public class Class1 10     { 11         [Test] 12         public void Test() 13         { 14             Func<string, bool> excludeFromCompression = path => { return false; }; 15   16             MemoryStream compressed = new MemoryStream(); 17   18   19             compressed.CompressDirectory("c:\\Temp", excludeFromCompression); 20   21   22             // sharpzip closes the target so we need to create a new seekable  stream 23             MemoryStream compressed2 = new MemoryStream(compressed.ToArray()); 24   25             Func<string, bool> excludeFromDecompression = path => { return false; }; 26   27             compressed2.DecompressToDirectory("c:\\Temp2", null, excludeFromDecompression); 28         } 29     } 30 }
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