(Ruby) SFTP Fsync -- Flush an Open File on the Server

Demonstrates how to flush the contents of an open file on the server. This example only works for servers that implement the fsync@openssh.com extension.

Note: This example requires Chilkat v9.5.0.71 or later.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

sftp = Chilkat::CkSFtp.new()

# Pass a domain or IP address..
success = sftp.Connect("my-sftp-server.com",22)
if (success == true)
    success = sftp.AuthenticatePw("mySFtpLogin","mySFtpPassword")
end

if (success == true)
    success = sftp.InitializeSftp()
end

if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Open a file on the server for writing.
handle = sftp.openFile("myTest.txt","writeOnly","createTruncate")
if (sftp.get_LastMethodSuccess() != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Write some text to the file:
success = sftp.WriteFileText(handle,"ansi","abcdefghijklmnopqrstuvwxyz")
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Make sure the server flushes what we wrote to the disk..
# (this is requires a server that implements the fsync@openssh.com SFTP protocol extension)
success = sftp.Fsync(handle)
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# ....
# ....

success = sftp.WriteFileText(handle,"ansi","ABCDEFGHIJKLMNOPQRSTUVWXYZ")
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Close the file.
success = sftp.CloseHandle(handle)
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";