(PowerBuilder) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Ftp
integer li_Success
oleobject loo_Fac
oleobject loo_StreamObj
oleobject t
oleobject loo_Bd

// This example assumes the Chilkat FTP2 API to have been previously unlocked.
// See FTP2 Unlock Sample for sample code.

loo_Ftp = create oleobject
// Use "Chilkat_9_5_0.Ftp2" for versions of Chilkat < 10.0.0
li_rc = loo_Ftp.ConnectToNewObject("Chilkat.Ftp2")
if li_rc < 0 then
    destroy loo_Ftp
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Ftp.Hostname = "www.my-ftp-server.com"
loo_Ftp.Username = "mFtpLogin"
loo_Ftp.Password = "myFtpPassword"
loo_Ftp.AuthTls = 1
loo_Ftp.Passive = 1

// Connect and login to the FTP server using TLS.
li_Success = loo_Ftp.Connect()
if li_Success <> 1 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    return
end if

// We'll read the incoming data chunk-by-chunk and write to an output file.
loo_Fac = create oleobject
// Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
li_rc = loo_Fac.ConnectToNewObject("Chilkat.FileAccess")

li_Success = loo_Fac.OpenForWrite("qa_output/penguins2.jpg")
if li_Success <> 1 then
    Write-Debug loo_Fac.LastErrorText
    destroy loo_Ftp
    destroy loo_Fac
    return
end if

loo_StreamObj = create oleobject
// Use "Chilkat_9_5_0.Stream" for versions of Chilkat < 10.0.0
li_rc = loo_StreamObj.ConnectToNewObject("Chilkat.Stream")

// Create a task to do the FTP download.
t = loo_Ftp.GetFileToStreamAsync("penguins2.jpg",loo_StreamObj)
if loo_Ftp.LastMethodSuccess <> 1 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    destroy loo_Fac
    destroy loo_StreamObj
    return
end if

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

loo_Bd = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_Bd.ConnectToNewObject("Chilkat.BinData")

do while loo_StreamObj.EndOfStream <> 1
    // Get the next chunk of JPG bytes.
    loo_StreamObj.ReadBd(loo_Bd)
    // Do something with it..
    // In this simple example, we'll just write to the file.
    loo_Fac.FileWriteBd(loo_Bd,0,0)
    // Clear for the next read.
    loo_Bd.Clear()
loop

loo_Fac.FileClose()

destroy t

Write-Debug "Success."


destroy loo_Ftp
destroy loo_Fac
destroy loo_StreamObj
destroy loo_Bd