Visual FoxPro

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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Visual FoxPro

LOCAL lnSuccess
LOCAL loFtp
LOCAL loFileStream

lnSuccess = 0

*  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.

loFtp = CreateObject('Chilkat.Ftp2')

loFtp.Hostname = "ftp.example.com"
loFtp.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.
loFtp.Password = "myPassword"

lnSuccess = loFtp.Connect()
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

*  Configure the stream's destination sink before downloading.  Here the stream writes to a
*  local file.
loFileStream = CreateObject('Chilkat.Stream')
loFileStream.SinkFile = "qa_output/report.pdf"

lnSuccess = loFtp.GetFileToStream("public_html/report.pdf",loFileStream)
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    RELEASE loFileStream
    CANCEL
ENDIF

? "Downloaded to stream."

lnSuccess = loFtp.Disconnect()
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    RELEASE loFileStream
    CANCEL
ENDIF

RELEASE loFtp
RELEASE loFileStream