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Download an FTP File to a Stream

Demonstrates the Chilkat Ftp2.GetFileToStream method, which downloads a remote file and writes its bytes to a Stream. The first argument is the remote file path and the second is the Stream, which must have a destination sink configured beforehand.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Streaming to a Stream object decouples the download from where the bytes ultimately go — a file (as here, via SinkFile), or a pipe feeding another component such as a decompressor or a hashing routine — and processes the data as it arrives rather than buffering the whole file. That keeps memory flat for large downloads and lets you chain the transfer into a processing pipeline.

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Local $bSuccess = False

;  Demonstrates the Ftp2.GetFileToStream method, which downloads a remote file and writes its
;  bytes to a Stream.  The 1st argument is the remote file path and the 2nd is the Stream.

$oFtp = ObjCreate("Chilkat.Ftp2")

$oFtp.Hostname = "ftp.example.com"
$oFtp.Username = "myFtpLogin"

;  Normally you would not hard-code the password in source.  You should instead obtain it
;  from an interactive prompt, environment variable, or a secrets vault.
$oFtp.Password = "myPassword"

$bSuccess = $oFtp.Connect()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf

;  Configure the stream's destination sink before downloading.  Here the stream writes to a
;  local file.
$oFileStream = ObjCreate("Chilkat.Stream")
$oFileStream.SinkFile = "qa_output/report.pdf"

$bSuccess = $oFtp.GetFileToStream("public_html/report.pdf",$oFileStream)
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Downloaded to stream." & @CRLF)

$bSuccess = $oFtp.Disconnect()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf