I want to perform the checksum MD5 control after the upload of file to FTP(S) server.
What steps should I follow in C#? I think I have to use the XMD5 command on FTPS server and get the result.
But I do not know how to do it.
Thanks
Asked
Active
Viewed 3,444 times
0
Martin Prikryl
- 188,800
- 56
- 490
- 992
Cosma Iaffaldano
- 221
- 4
- 13
-
What FTP library/class are you using? – Martin Prikryl Aug 23 '17 at 14:28
-
FtpWebResponse of .Net – Cosma Iaffaldano Aug 23 '17 at 14:34
-
Do you even know if your FTP server supports XMD5 command? – Martin Prikryl Aug 23 '17 at 14:40
-
No..I'm developing and am simulating locally with filezilla server – Cosma Iaffaldano Aug 23 '17 at 14:45
-
There's no standard for checksum calculation, so there's no point developing this against some FTP server, if you are going to use another one in production. – Martin Prikryl Aug 23 '17 at 14:53
-
See https://stackoverflow.com/q/30626006/850848 – Martin Prikryl Aug 23 '17 at 14:54
1 Answers
1
You cannot execute random FTP commands using .NET FtpWebRequest, nor any other built-in .NET class.
You have to use a 3rd party FTP library for this.
For example WinSCP .NET assembly has Session.CalculateFileChecksum method. The method will automatically map checksum algorithm name (as "md5") to an FTP command that the server supports. So if the server supports XMD5, it will use XMD5.
(I'm the author of WinSCP)
For some background, see also my answer to:
FTP: copy, check integrity and delete
Martin Prikryl
- 188,800
- 56
- 490
- 992