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(Ruby) Directory Existence Check

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the directory.

Chilkat Ruby Downloads

Ruby Library for Linux and MAC OS X

require 'chilkat'

ftp = Chilkat::CkFtp2.new()

#  Any string unlocks the component for the 1st 30-days.
success = ftp.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
end

ftp.put_Hostname("ftp.yourftpserver.com")
ftp.put_Username("***")
ftp.put_Password("***")

#  Connect and login to the FTP server.
success = ftp.Connect()
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
end

#  Does the "temp" directory exist?

dirExists = ftp.ChangeRemoteDir("/temp")
if (dirExists == true)
    print "Yes, the temp directory exists." + "\n";
    #   Yes, it exists. Restore the current remote dir:
    success = ftp.ChangeRemoteDir("..")
    if (success != true)
        print ftp.lastErrorText() + "\n";
        exit
    end

end

#  Alternatively, you may set the ListPattern = "*" and
#   look for the directory:
ftp.put_ListPattern("*")

n = ftp.GetDirCount()
if (n < 0)
    #  Failed to get directory listing based on ListPattern
    print ftp.lastErrorText() + "\n";
    exit
end

if (n > 0)
    for i in 0 .. n - 1

        isDir = ftp.GetIsDirectory(i)
        if (isDir == true)

            fname = ftp.getFilename(i)
            if (fname == "temp")
                print "Found temp directory!" + "\n";
                success = ftp.Disconnect()
                exit
            end

        end

    end
end

success = ftp.Disconnect()

 

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