我如何在一个文件块中找到散列而不必将块保存在单独的文件中？ [英] how do i find a hash for a chunk of file without having to save the chunk in a separate file?

问题描述

我想为一个文件块找到一个散列并将该散列保存在另一个文件中。我想直接做，而不必将块保存在单独的文件中。这是我的程序。

  Const chunksize = 1024000000 
 dim istream，ostream 
 Sub WriteChunk（data）
 Set oStream = CreateObject（ADODB.Stream）
 oStream.Open 
 oStream.Type = 1 
 oStream.Write data 
 
 Dim WshShell，oExec，input，objfile2 ，str1 
 Set WshShell = CreateObject（WScript.Shell）
 Set oExec = WshShell.exec（C：\ Users \Administrator\desktop\experimenting\md5.exe_ 
 -odup5.txt& ostream.write&）
 
 input =
 Do While oexec.status = 0 
 WScript。 Sleep 50 
 Loop 
 oStream.Close 
 End Sub 
 
 Set iStream = CreateObject（ADODB.Stream）
 iStream.Open 
 iStream.Type = 1'binary 
 Const FOR_READING = 1 
 
 strFolder =C：\test
 
 Set objFSO = CreateObject（Scripting.FileSystemObject ）
 
 Set objFolder = objFSO.GetFolder（st rFolder）
 
设置colFiles = objFolder.Files 
 
对于每个objFile在colFiles中
 iStream.LoadFromFile objfile.path 
 Do直到istream.EOS 
 WriteChunk iStream.Read（chunksize）
 
 
循环
 
 
下一个
 
 ShowSubFolders（objFolder）
 
 
 Sub ShowSubFolders（objFolder）
 
设置colFolders = objFolder.SubFolders 
 
对于每个objSubFolder在colFolders中
 
 set colFiles = objSubFolder.Files 
 
对于每个objFile2在colFiles中
 
 
 iStream.LoadFromFile objfile2.path 
 Do直到istream.EOS 
 WriteChunk iStream.Read（chunksize）
 
 
 
循环
下一个
 
 ShowSubFolders（objSubFolder）
 
下一个
 
 End Sub 
 
 
 iStream.Close 
  

ostream.write不能用作参数。但我不理解什么可以用来代替那个..请帮助解决方案

Set oExec = WshShell.exec（C：\ Users \Administrator\desktop\experimenting\md5.exe_
-odup5.txt& ostream.write& ）

以上将失败，因为您不能在字符串中使用换行符。此外， ostream.write 表示您正在尝试将写入 ADODB Stream对象。你真正想要做什么（假设我正确理解你的问题，并且你正在使用这个 <$ c
$ b

  WshShell.RunC：\\ c> md5.exe ）是这样的：
 \\ ... \md5.exe -chunk_md5.txt -d&数据& 
  

要将所有数据块的结果写入同一个文件，这：

  WshShell.Run％COMSPEC％/ c md5.exe -o- -d&数据& > chunk_md5.txt，1，True 
  

或者像这样：

  Set md5 = WshShell.Exec（md5.exe -o- -d& data&）
 Do while md5.Status = 0 
 WScript.Sleep 100 
 Loop 
 objFSO.OpenTextFile（chunk_md5.txt，8，True）.Write md5.StdOut.ReadAll 
  

或者您可以使用这个VBScript 用于计算哈希值并将结果写入文件。

I want to find a hash for a chunk of file and save that hash in another file. I want to do it directly without having to save the chunk in a separate file.. here is my program.

 Const chunksize = 1024000000
 dim istream,ostream
  Sub WriteChunk(data)
   Set oStream = CreateObject("ADODB.Stream")
   oStream.Open
   oStream.Type = 1 
   oStream.Write data

   Dim WshShell, oExec, input,objfile2,str1
   Set WshShell = CreateObject("WScript.Shell")
   Set oExec    = WshShell.exec("C:\Users\Administrator\desktop\experimenting\md5.exe_
                             -odup5.txt """ & ostream.write & """")

   input = ""
      Do While oexec.status=0
     WScript.Sleep 50
     Loop
     oStream.Close
   End Sub

    Set iStream = CreateObject("ADODB.Stream")
     iStream.Open
   iStream.Type = 1  'binary
    Const FOR_READING = 1

     strFolder = "C:\test" 

     Set objFSO = CreateObject("Scripting.FileSystemObject")

     Set objFolder = objFSO.GetFolder(strFolder)

     Set colFiles = objFolder.Files

     For Each objFile In colFiles
      iStream.LoadFromFile objfile.path
        Do Until istream.EOS
      WriteChunk iStream.Read(chunksize)


      loop 


     Next

     ShowSubFolders(objFolder)


   Sub ShowSubFolders(objFolder)

   Set colFolders = objFolder.SubFolders

       For Each objSubFolder In colFolders

      set colFiles = objSubFolder.Files

      For Each objFile2 In colFiles


      iStream.LoadFromFile objfile2.path
      Do Until istream.EOS
      WriteChunk iStream.Read(chunksize)



        loop 
        Next

        ShowSubFolders(objSubFolder)

       Next

     End Sub


       iStream.Close

ostream.write cannot be used as an argument. But i am not understanding as to what can be used instead of that..please help

解决方案

Set oExec = WshShell.exec("C:\Users\Administrator\desktop\experimenting\md5.exe_
                     -odup5.txt """ & ostream.write & """")

The above will fail, because you can't use line-wrapping inside strings. Also, ostream.write means you're trying to write something to an ADODB Stream object. What you actually want to do (assuming I understood your question correctly and you're using this md5.exe) is something like this:

WshShell.Run "C:\...\md5.exe -ochunk_md5.txt -d""" & data & """"

To write the results of all chunks of data to the same file, do something like this:

WshShell.Run "%COMSPEC% /c md5.exe -o- -d""" & data & """>chunk_md5.txt", 1, True

or like this:

Set md5 = WshShell.Exec("md5.exe -o- -d""" & data & """")
Do While md5.Status = 0
  WScript.Sleep 100
Loop
objFSO.OpenTextFile("chunk_md5.txt", 8, True).Write md5.StdOut.ReadAll

Or you could use this VBScript for calculating the hash and write the result to a file.

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