(Ruby) FTP Download Binary File to a Stream

Demonstrates how to FTP download a binary file to a Chilkat stream.

Note: This example requires Chilkat v9.5.0.67 or greater.

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 FTP2 API to have been previously unlocked.
# See FTP2 Unlock Sample for sample code.

ftp = Chilkat::CkFtp2.new()

ftp.put_Hostname("www.my-ftp-server.com")
ftp.put_Username("mFtpLogin")
ftp.put_Password("myFtpPassword")
ftp.put_AuthTls(true)
ftp.put_Passive(true)

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

# We'll read the incoming data chunk-by-chunk and write to an output file.
fac = Chilkat::CkFileAccess.new()
success = fac.OpenForWrite("qa_output/penguins2.jpg")
if (success != true)
    print fac.lastErrorText() + "\n";
    exit
end

streamObj = Chilkat::CkStream.new()

# Create a task to do the FTP download.
# t is a CkTask
t = ftp.GetFileToStreamAsync("penguins2.jpg",streamObj)
if (ftp.get_LastMethodSuccess() != true)
    print ftp.lastErrorText() + "\n";
    exit
end

# Start the task in a background thread.
t.Run()

bd = Chilkat::CkBinData.new()
while streamObj.get_EndOfStream() != true
    # Get the next chunk of JPG bytes.
    streamObj.ReadBd(bd)
    # Do something with it..
    # In this simple example, we'll just write to the file.
    fac.FileWriteBd(bd,0,0)
    # Clear for the next read.
    bd.Clear()
end

fac.FileClose()

print "Success." + "\n";