Visual FoxPro

Monitor FTP Transfer Progress

Demonstrates the progress properties CurBytesReceived, CurBytesReceivedStr, CurBytesSent, CurBytesSentStr, ProgressMonSize, PercentDoneScale, and AutoGetSizeForProgress.

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: Percentage progress needs a known total, but FTP does not always report a file's size up front — so AutoGetSizeForProgress issues a SIZE command before a download, and ProgressMonSize supplies an expected size when even that is unavailable (a one-shot value consumed by the next transfer). PercentDoneScale sets the resolution of progress callbacks. The current byte counts are exposed both as 32-bit integers and as strings, the string forms avoiding integer-width limits for very large transfers.

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Visual FoxPro

LOCAL lnSuccess
LOCAL loFtp

lnSuccess = 0

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

*  AutoGetSizeForProgress sends a SIZE command before a download so percentage-based progress can
*  be computed.
loFtp.AutoGetSizeForProgress = 1

*  PercentDoneScale sets the value representing one hundred percent in PercentDone callbacks.
*  1000 gives tenth-of-a-percent resolution.
loFtp.PercentDoneScale = 1000

*  ProgressMonSize is a one-shot expected size for the next download when the size is not
*  otherwise known.  It is consumed by the next download and reset to 0.
loFtp.ProgressMonSize = 20485760

lnSuccess = loFtp.GetFile("public_html/bigfile.zip","qa_output/bigfile.zip")
IF (lnSuccess = 0) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

*  After a transfer, the current byte counts are available as 32-bit numbers or as strings (the
*  string forms avoid integer-size limits).
? "Bytes received: " + STR(loFtp.CurBytesReceived)
? "Bytes received (str): " + loFtp.CurBytesReceivedStr
? "Bytes sent: " + STR(loFtp.CurBytesSent)
? "Bytes sent (str): " + loFtp.CurBytesSentStr

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

RELEASE loFtp