CkPython

Get a Remote File's Size (32-bit)

Demonstrates the Chilkat SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a 32-bit integer. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: A 32-bit signed integer tops out near 2 GB, so this is fine for ordinary files but will misreport or fail for larger ones. When a file might exceed that, use GetFileSizeStr, which returns the size as a decimal string and cannot overflow. The two boolean arguments are shared by all the attribute getters: the first follows symbolic links to their target, and the second says whether you passed a path or an open handle.

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import sys
import chilkat

success = False

#  Demonstrates the SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a
#  32-bit integer.  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.

sftp = chilkat.CkSFtp()

#  Connect, authenticate, and initialize the SFTP subsystem.
port = 22
success = sftp.Connect("sftp.example.com",port)
if (success == False):
    print(sftp.lastErrorText())
    sys.exit()

#  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.
password = "mySshPassword"

success = sftp.AuthenticatePw("mySshLogin",password)
if (success == False):
    print(sftp.lastErrorText())
    sys.exit()

success = sftp.InitializeSftp()
if (success == False):
    print(sftp.lastErrorText())
    sys.exit()

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

fileSize = sftp.GetFileSize32("subdir/report.pdf",bFollowLinks,bIsHandle)
if (fileSize < 0):
    print(sftp.lastErrorText())
    sys.exit()

print("File size: " + str(fileSize) + " bytes")

#  Note: For files that may exceed 2 GB, use GetFileSizeStr (returns a decimal string) instead,
#  because the value can overflow a 32-bit integer.

sftp.Disconnect()