Esempio n. 1
0
        private static void CreateZipFile(string lpSourceFile, string lpZipFile, GZipResult result)
        {
            byte[]     buffer;
            int        count = 0;
            FileStream fsOut = null;
            FileStream fsIn  = null;
            GZipStream gzip  = null;

            // compress the file into the zip file
            try
            {
                fsOut = new FileStream(lpZipFile, FileMode.Create, FileAccess.Write, FileShare.None);
                gzip  = new GZipStream(fsOut, CompressionMode.Compress, true);

                fsIn   = new FileStream(lpSourceFile, FileMode.Open, FileAccess.Read, FileShare.Read);
                buffer = new byte[fsIn.Length];
                count  = fsIn.Read(buffer, 0, buffer.Length);
                fsIn.Close();
                fsIn = null;

                // compress to the zip file
                gzip.Write(buffer, 0, buffer.Length);

                result.ZipFileSize        = fsOut.Length;
                result.CompressionPercent = GetCompressionPercent(result.TempFileSize, result.ZipFileSize);
            }
            catch //(Exception ex1)
            {
                result.Errors = true;
            }
            finally
            {
                if (gzip != null)
                {
                    gzip.Close();
                    gzip = null;
                }
                if (fsOut != null)
                {
                    fsOut.Close();
                    fsOut = null;
                }
                if (fsIn != null)
                {
                    fsIn.Close();
                    fsIn = null;
                }
            }
        }
Esempio n. 2
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        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="files">在zip文件中包含的FileInfo对象数组</param>
        /// <param name="lpBaseFolder">
        /// 基础文件夹,在创建的zip文件中存储的文件的相对路径。例如, 如果lpBaseFolder 是 'C:\zipTest\Files\',
        /// 当存在一个文件 'C:\zipTest\Files\folder1\sample.txt' 在数组'files'里面, 则 sample.txt 的相对路径是 'folder1/sample.txt'
        /// </param>
        /// <param name="lpDestFolder">写入Zip文件的文件夹</param>
        /// <param name="zipFileName">Zip文件名</param>
        /// <param name="deleteTempFile">布尔值,如果为true则删除中间临时文件,false则在lpDestFolder保留临时文件(调试用)</param>
        public static GZipResult Compress(FileInfo[] files, string lpBaseFolder, string lpDestFolder, string zipFileName, bool deleteTempFile)
        {
            GZipResult result = new GZipResult();

            try
            {
                if (!lpDestFolder.EndsWith("\\"))
                {
                    lpDestFolder += "\\";
                }

                string lpTempFile = lpDestFolder + zipFileName + ".tmp";
                string lpZipFile  = lpDestFolder + zipFileName;

                result.TempFile = lpTempFile;
                result.ZipFile  = lpZipFile;

                if (files != null && files.Length > 0)
                {
                    CreateTempFile(files, lpBaseFolder, lpTempFile, result);

                    if (result.FileCount > 0)
                    {
                        CreateZipFile(lpTempFile, lpZipFile, result);
                    }

                    // delete the temp file
                    if (deleteTempFile)
                    {
                        File.Delete(lpTempFile);
                        result.TempFileDeleted = true;
                    }
                }
            }
            catch //(Exception ex4)
            {
                result.Errors = true;
            }
            return(result);
        }
Esempio n. 3
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        private static FileStream UnzipToTempFile(string lpZipFile, string lpTempFile, GZipResult result)
        {
            FileStream fsIn   = null;
            GZipStream gzip   = null;
            FileStream fsOut  = null;
            FileStream fsTemp = null;

            const int bufferSize = 4096;

            byte[] buffer = new byte[bufferSize];
            int    count  = 0;

            try
            {
                fsIn = new FileStream(lpZipFile, FileMode.Open, FileAccess.Read, FileShare.Read);
                result.ZipFileSize = fsIn.Length;

                fsOut = new FileStream(lpTempFile, FileMode.Create, FileAccess.Write, FileShare.None);
                gzip  = new GZipStream(fsIn, CompressionMode.Decompress, true);
                while (true)
                {
                    count = gzip.Read(buffer, 0, bufferSize);
                    if (count != 0)
                    {
                        fsOut.Write(buffer, 0, count);
                    }
                    if (count != bufferSize)
                    {
                        break;
                    }
                }
            }
            catch //(Exception ex1)
            {
                result.Errors = true;
            }
            finally
            {
                if (gzip != null)
                {
                    gzip.Close();
                    gzip = null;
                }
                if (fsOut != null)
                {
                    fsOut.Close();
                    fsOut = null;
                }
                if (fsIn != null)
                {
                    fsIn.Close();
                    fsIn = null;
                }
            }

            fsTemp = new FileStream(lpTempFile, FileMode.Open, FileAccess.Read, FileShare.None);
            if (fsTemp != null)
            {
                result.TempFileSize = fsTemp.Length;
            }
            return(fsTemp);
        }
Esempio n. 4
0
        /// <summary>
        /// 解压文件
        /// </summary>
        /// <param name="lpSrcFolder">zip文件的源目录</param>
        /// <param name="lpDestFolder">解压到的目录</param>
        /// <param name="zipFileName">Zip文件名</param>
        /// <param name="deleteTempFile">布尔值,如果为true则删除中间临时文件,false则在lpDestFolder保留临时文件(调试用)</param>
        /// <param name="writeFiles"></param>
        /// <param name="addExtension">增加后缀名</param>
        /// <param name="htFiles"></param>
        /// <param name="bufferSize"></param>
        /// <returns></returns>
        public static GZipResult Decompress(string lpSrcFolder, string lpDestFolder, string zipFileName,
                                            bool deleteTempFile, bool writeFiles, string addExtension, Hashtable htFiles, int bufferSize)
        {
            GZipResult result = new GZipResult();

            if (!lpSrcFolder.EndsWith("\\"))
            {
                lpSrcFolder += "\\";
            }

            if (!lpDestFolder.EndsWith("\\"))
            {
                lpDestFolder += "\\";
            }

            string lpTempFile = lpSrcFolder + zipFileName + ".tmp";
            string lpZipFile  = lpSrcFolder + zipFileName;

            result.TempFile = lpTempFile;
            result.ZipFile  = lpZipFile;

            string       line       = null;
            string       lpFilePath = null;
            string       lpFolder   = null;
            GZipFileInfo gzf        = null;
            FileStream   fsTemp     = null;
            ArrayList    gzfs       = new ArrayList();
            bool         write      = false;

            if (string.IsNullOrEmpty(addExtension))
            {
                addExtension = string.Empty;
            }
            else if (!addExtension.StartsWith("."))
            {
                addExtension = "." + addExtension;
            }

            // extract the files from the temp file
            try
            {
                fsTemp = UnzipToTempFile(lpZipFile, lpTempFile, result);
                if (fsTemp != null)
                {
                    while (fsTemp.Position != fsTemp.Length)
                    {
                        line = null;
                        while (string.IsNullOrEmpty(line) && fsTemp.Position != fsTemp.Length)
                        {
                            line = ReadLine(fsTemp);
                        }

                        if (!string.IsNullOrEmpty(line))
                        {
                            gzf = new GZipFileInfo();
                            if (gzf.ParseFileInfo(line) && gzf.Length > 0)
                            {
                                gzfs.Add(gzf);
                                lpFilePath    = lpDestFolder + gzf.RelativePath;
                                lpFolder      = GetFolder(lpFilePath);
                                gzf.LocalPath = lpFilePath;

                                write = false;
                                if (htFiles == null || htFiles.ContainsKey(gzf.RelativePath))
                                {
                                    gzf.RestoreRequested = true;
                                    write = writeFiles;
                                }

                                if (write)
                                {
                                    // make sure the folder exists
                                    if (!Directory.Exists(lpFolder))
                                    {
                                        Directory.CreateDirectory(lpFolder);
                                    }

                                    // read from fsTemp and write out the file
                                    gzf.Restored = WriteFile(fsTemp, gzf.Length, lpFilePath + addExtension, bufferSize);
                                }
                                else
                                {
                                    // need to advance fsTemp
                                    fsTemp.Position += gzf.Length;
                                }
                            }
                        }
                    }
                }
            }
            catch //(Exception ex3)
            {
                result.Errors = true;
            }
            finally
            {
                if (fsTemp != null)
                {
                    fsTemp.Close();
                    fsTemp = null;
                }
            }

            // delete the temp file
            try
            {
                if (deleteTempFile)
                {
                    File.Delete(lpTempFile);
                    result.TempFileDeleted = true;
                }
            }
            catch //(Exception ex4)
            {
                result.Errors = true;
            }

            result.FileCount = gzfs.Count;
            result.Files     = new GZipFileInfo[gzfs.Count];
            gzfs.CopyTo(result.Files);
            return(result);
        }
Esempio n. 5
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        private static void CreateTempFile(FileInfo[] files, string lpBaseFolder, string lpTempFile, GZipResult result)
        {
            byte[] buffer;
            int    count = 0;

            byte[]       header;
            string       fileHeader   = null;
            string       fileModDate  = null;
            string       lpFolder     = null;
            int          fileIndex    = 0;
            string       lpSourceFile = null;
            string       vpSourceFile = null;
            GZipFileInfo gzf          = null;
            FileStream   fsOut        = null;
            FileStream   fsIn         = null;

            if (files != null && files.Length > 0)
            {
                try
                {
                    result.Files = new GZipFileInfo[files.Length];

                    // open the temp file for writing
                    fsOut = new FileStream(lpTempFile, FileMode.Create, FileAccess.Write, FileShare.None);

                    foreach (FileInfo fi in files)
                    {
                        lpFolder = fi.DirectoryName + "\\";
                        try
                        {
                            gzf       = new GZipFileInfo();
                            gzf.Index = fileIndex;

                            // read the source file, get its virtual path within the source folder
                            lpSourceFile     = fi.FullName;
                            gzf.LocalPath    = lpSourceFile;
                            vpSourceFile     = lpSourceFile.Replace(lpBaseFolder, string.Empty);
                            vpSourceFile     = vpSourceFile.Replace("\\", "/");
                            gzf.RelativePath = vpSourceFile;

                            fsIn   = new FileStream(lpSourceFile, FileMode.Open, FileAccess.Read, FileShare.Read);
                            buffer = new byte[fsIn.Length];
                            count  = fsIn.Read(buffer, 0, buffer.Length);
                            fsIn.Close();
                            fsIn = null;

                            fileModDate      = fi.LastWriteTimeUtc.ToString();
                            gzf.ModifiedDate = fi.LastWriteTimeUtc;
                            gzf.Length       = buffer.Length;

                            fileHeader = fileIndex.ToString() + "," + vpSourceFile + "," + fileModDate + "," + buffer.Length.ToString() + "\n";
                            header     = Encoding.Default.GetBytes(fileHeader);

                            fsOut.Write(header, 0, header.Length);
                            fsOut.Write(buffer, 0, buffer.Length);
                            fsOut.WriteByte(10); // linefeed

                            gzf.AddedToTempFile = true;

                            // update the result object
                            result.Files[fileIndex] = gzf;

                            // increment the fileIndex
                            fileIndex++;
                        }
                        catch //(Exception ex1)
                        {
                            result.Errors = true;
                        }
                        finally
                        {
                            if (fsIn != null)
                            {
                                fsIn.Close();
                                fsIn = null;
                            }
                        }
                        if (fsOut != null)
                        {
                            result.TempFileSize = fsOut.Length;
                        }
                    }
                }
                catch //(Exception ex2)
                {
                    result.Errors = true;
                }
                finally
                {
                    if (fsOut != null)
                    {
                        fsOut.Close();
                        fsOut = null;
                    }
                }
            }

            result.FileCount = fileIndex;
        }