Android Question test FTP connection b4x

[Uniko Sistemi srl]

Hi everyone
I need to know if there is a way to know if the connection made to an FTP was successful. because if I try to put the wrong FTP address and execute FTP1.Initialize with all the relative parameters, I don't get any response to know if I'm connected to the FTP server or not....
This is because I would like to test if the FTP server is online before starting to transfer or read data...
I tried to PING but it takes too long...
Is there a way?
A thousand thanks

 

[teddybear]

FTP1.Initialize doesn't connect to the ftpserver. you can use FTP1.List(".") to check whether the ftpserver has been connected. if a wrong address is given, it will take 120s for timeout.

 

[aeric]

Try:

Dim ftp As FTP
ftp.Initialize("ftp", "ftp.domain.com", 21, "user", "password")
Dim sf As Object = ftp.SendCommand("ACCT", Null)
Wait For (sf) ftp_CommandCompleted (Command As String, Success As Boolean, ReplyCode As Int, ReplyString As String)
Log(Command & "->" & Success & "->" & ReplyCode & "->" & ReplyString)

edit: I am not familiar with FTP but maybe can try some commands like NOOP, PWD or STAT

What is FTP ACCT command for?

The FTP protocol has quite some commands that can be used: ABOR - abort a file transfer CWD - change working directory DELE - delete a remote file LIST - list remote files MDTM - return the modifi...

stackoverflow.com

 

[Brian Dean]

A similar question was asked a few weeks ago. This was my suggestion . . .

1. Set the FTP timeout to, say, 200msec.
2. Try to send a dummy test file, just a few bytes.
3. If the FTP link times out you can tell that you do not have a connection.
4. If the dummy file transfer succeeds reset the timeout to something sensible, say 5000.

Here is a link.

I tried to PING but it takes too long...

I am not sure what you mean by "too long".

 

[Uniko Sistemi srl]

A similar question was asked a few weeks ago. This was my suggestion . . .

1. Set the FTP timeout to, say, 200msec.
2. Try to send a dummy test file, just a few bytes.
3. If the FTP link times out you can tell that you do not have a connection.
4. If the dummy file transfer succeeds reset the timeout to something sensible, say 5000.

Here is a link.



I am not sure what you mean by "too long".

thanks i tried to use your example, i just need to figure out where i can find FTPLINK because it's a library that i probably miss Thank you

 

[Brian Dean]

i just need to figure out where i can find FTPLINK because it's a library that i probably miss

Yes - it is not easy to find. In case you have not found it yet, FTP is part of the Net library.