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  • Paul Cowan
    #1

    download complete

    Hi all,

    I am in a bit of a quandry. We have a change to make to an existing
    windows service which polls a folder at configurable times and if a
    certain file is found, it is ftp'd to a remote directory.

    We have a new requirement where by we are now downloading large files
    to UNIX. We have to provide a locking mechanism whereby we place what
    is called a lock file on the remote directory and only remove it when
    the proper file has completely been downloaded.

    My question is (and I am no expert on ftp), is how do I know when the
    file has been completely transferred onto the UNIX box.

    I have heard talk of CRC, but can find very little on google about
    this.

    Any help greatly appreciated

    Paul
    Tags: None
    • Nicholas Paldino [.NET/C# MVP]
      #2
      Re: download complete

      Paul,

      I don't think that CRC is what you need to use. If you are FTPing the
      file programatically , then the code will inform you when the file is
      uploaded. For example, if you are performing an asynchronous operation,
      then a callback will be called when the operation is complete. If you are
      performing a synchronous operation, then the upload is complete when the
      method you call to upload the file returns. After that, you can do what you
      wish, deleting or removing the file.

      Hope this helps.


      --
      - Nicholas Paldino [.NET/C# MVP]
      - nick(dot)paldin o=at=exisconsul ting<dot>com

      "Paul Cowan" <dagda1@hotmail .com> wrote in message
      news:f45ae861.0 310080223.42ed0 e28@posting.goo gle.com...[color=blue]
      > Hi all,
      >
      > I am in a bit of a quandry. We have a change to make to an existing
      > windows service which polls a folder at configurable times and if a
      > certain file is found, it is ftp'd to a remote directory.
      >
      > We have a new requirement where by we are now downloading large files
      > to UNIX. We have to provide a locking mechanism whereby we place what
      > is called a lock file on the remote directory and only remove it when
      > the proper file has completely been downloaded.
      >
      > My question is (and I am no expert on ftp), is how do I know when the
      > file has been completely transferred onto the UNIX box.
      >
      > I have heard talk of CRC, but can find very little on google about
      > this.
      >
      > Any help greatly appreciated
      >
      > Paul[/color]


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