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Get a Remote File's Size as a String

Demonstrates the Chilkat SFtp.GetFileSizeStr method, which returns a remote file's size in bytes as a decimal string. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: Returning the size as a string sidesteps integer-width limits entirely, so it is the safe choice for files of any size — multi-gigabyte archives, disk images, database dumps. It is also convenient in programming languages that lack a native 64-bit integer type. When you need to do arithmetic on the value, parse the string; when you only need to display or log it, the string is ready to use.

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llSuccess = .F.

//  Demonstrates the SFtp.GetFileSizeStr method, which returns a remote file's size in bytes as a
//  decimal string.  The 1st argument is the remote path (or handle), the 2nd selects whether
//  symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

loSftp = createobject("CkSFtp")

//  Connect, authenticate, and initialize the SFTP subsystem.
lnPort = 22
llSuccess = loSftp.Connect("sftp.example.com",lnPort)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    return
endif

//  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.
lcPassword = "mySshPassword"

llSuccess = loSftp.AuthenticatePw("mySshLogin",lcPassword)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    return
endif

llSuccess = loSftp.InitializeSftp()
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    return
endif

//  The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
//  The 3rd argument (bIsHandle) is .F. here because the 1st argument is a path, not an
//  open handle.
llBFollowLinks = .T.
llBIsHandle = .F.

//  A string return avoids the 32-bit overflow that GetFileSize32 would have for very large files.
lcFileSize = loSftp.GetFileSizeStr("subdir/hugefile.dat",llBFollowLinks,llBIsHandle)
if (loSftp.LastMethodSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    return
endif

? "File size: " + lcFileSize + " bytes"

loSftp.Disconnect()


release loSftp