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How To Retrieve and Change FTP File Attributes by Using WinInet Functions.

, 31 Mar 2006
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An article about using the FTPCommand function to send direct commands to the FTP server.
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Description

There are several good articles on CodeProject containing different implementations of FTP Clients by using WinInet functions. But since WinInet FTP is limited by itself (provides only basic implementation of FTP protocol) these implementations also inherit these limitations.

For example, you cannot retrieve the file attributes or owner information and cannot change them by using WinInet functions.

Implementation

Fortunately, starting with Internet Explorer 5.0 and later, you can use the FtpCommand function to send direct commands to the FTP Server and parse results by yourself.

In this example, I send “LIST” command to the FTP Server and use “D. J. Bernstein, http://cr.yp.to/ftpparse.htmlftpparser to analyze results. I have modified the ftpparser a little for this article.

In this sample, I use only the “LIST” command. You can send any allowed command to the FTP server. For example, to change file permissions, you can send “SITE CHMOD ...”, to retrieve single file attributes/permissions you can use “STAT ...”, etc. Refer to RFC 959 to get more information about all possible FTP commands.

History

  • 31st March, 2006: Initial post

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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Comments and Discussions

 
GeneralA comfortable FTP class in .NET PinmemberElmue27-Aug-08 12:21 
QuestionWinInet - Secure FTP? PinmemberChiew Heng Wah3-Apr-06 16:07 

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