3

当我将 zip.MaxOutputSegmentSize 设置得足够高时,只有一个 zip 文件可以工作。一旦我限制 MaxOutputSegmentSize 在其中一个拆分文件达到其最大大小后出现此错误 - 当我有一个像 20MB 这样的值时,它总是出现在文件“.z02”的末尾,如果值更小它也可能稍后发生一些文件。

如果我使用 zip.ZipErrorAction = ZipErrorAction.Skip 或 .Retry 我会得到一个 System.ObjectDisposedException 。

这里可能是什么问题,或者这是 DotNetZip 库中的错误?

ZipFile zip = new ZipFile(backupPath + "Backup.zip");
            zip.MaxOutputSegmentSize = maxSize;
            //zip.TempFileFolder = @"D:\Backup\Temp"; //seems not to make any difference

            zip.Comment = "Backup created at " + System.DateTime.Now.ToString("G");
            zip.AddFile(dbBackup.FullName,"Database");
            zip.AddDirectory(physicalAppPath,"Application");

           zip.AddDirectory(mailArchivePath,"MailArchive");
           zip.Save(); //Exception occurs here

堆栈跟踪:

bei System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
bei System.IO.File.Move(String sourceFileName, String destFileName)
bei Ionic.Zip.ZipSegmentedStream.TruncateBackward(UInt32 diskNumber, Int64 offset)
bei Ionic.Zip.ZipEntry.Write(Stream s)
bei Ionic.Zip.ZipFile.Save()
bei MyProject.Configuration.Backup.BackupLogic.Backup(Boolean monthly) in D:\projects\MyProject.Configuration\Backup\BackupLogic.cs:Zeile 100.
bei MyProject.Configuration.Backup.BackupLogic.ScheduledBackup() in D:\projects\MyProject.Configuration\Backup\BackupLogic.cs:Zeile 42.
bei MyProject.Configuration.BackupTimer.CreateThread(Object parameters) in D:\projects\MyProject.Configuration\BackupTimer.cs:Zeile 60.
bei System.Threading.ExecutionContext.runTryCode(Object userData)
bei System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
bei System.Threading.ThreadHelper.ThreadStart(Object obj)

使用 ZipErrorAction.Skip 的异常和 StackTrace:

ObjectDisposed Exception was unhandled: Auf eine geschlossene Datei kann nicht zugegriffen werden. (Could not access an closed file)

bei System.IO.FileStream.get_Position()
bei Ionic.Zip.ZipEntry.Write(Stream s)
bei Ionic.Zip.ZipFile.Save()
...

在目标文件夹上带有过滤器的进程监视器显示没有任何可疑之处:(在这种情况下,创建了 3 个拆分文件,然后发生了异常)

12:35:25.6312905 PM w3wp.exe    5380    CreateFile  D:\Backup   SUCCESS Desired Access: Write Data/Add File, Synchronize, Disposition: Open, Options: , Attributes: n/a, ShareMode: Read, Write, AllocationSize: n/a, Impersonating: NT-AUTORITÄT\IUSR, OpenResult: Opened
12:35:25.6319249 PM w3wp.exe    5380    CloseFile   D:\Backup   SUCCESS 
12:35:27.7507327 PM w3wp.exe    5380    CreateFile  D:\Backup   SUCCESS Desired Access: Write Data/Add File, Synchronize, Disposition: Open, Options: , Attributes: n/a, ShareMode: Read, Write, AllocationSize: n/a, Impersonating: NT-AUTORITÄT\IUSR, OpenResult: Opened
12:35:27.7511904 PM w3wp.exe    5380    CloseFile   D:\Backup   SUCCESS 
12:35:32.9936509 PM w3wp.exe    5380    CreateFile  D:\Backup   SUCCESS Desired Access: Write Data/Add File, Synchronize, Disposition: Open, Options: , Attributes: n/a, ShareMode: Read, Write, AllocationSize: n/a, Impersonating: NT-AUTORITÄT\IUSR, OpenResult: Opened
12:35:32.9941529 PM w3wp.exe    5380    CloseFile   D:\Backup   SUCCESS 
4

1 回答 1

1

问题是一个文件夹中有 gzip 文件(带密码的 .gz) - 似乎 DotNetZip 无法拆分这些文件(7zip 可以)。因此,一旦到达充满这些 gzip 文件的 .zip 文件的末尾,就会发生异常。

我现在使用了一种解决方法,因此我循环所有文件,计算总大小并在每次达到最大大小时创建单个(未拆分)zip 文件。

DotNetZip 的问题(错误?)仍然存在。

于 2011-08-24T13:44:51.500 回答