Tcl

SCP Download/Upload Binary Files as Encoded Strings

See more SCP Examples

Demonstrates how to upload and download binary files as encoded strings (base64, hex, etc.) using the SCP protocol (Secure Copy Protocol over SSH). Tcl

load ./chilkat.dll

set success 0

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set ssh [new_CkSsh]

# Hostname may be an IP address or hostname:
set hostname "www.some-ssh-server.com"
set port 22

# Connect to an SSH server:
set success [CkSsh_Connect $ssh $hostname $port]
if {$success != 1} then {
    puts [CkSsh_lastErrorText $ssh]
    delete_CkSsh $ssh
    exit
}

# Wait a max of 5 seconds when reading responses..
CkSsh_put_IdleTimeoutMs $ssh 5000

# Authenticate using login/password:
set success [CkSsh_AuthenticatePw $ssh "myLogin" "myPassword"]
if {$success != 1} then {
    puts [CkSsh_lastErrorText $ssh]
    delete_CkSsh $ssh
    exit
}

# Once the SSH object is connected and authenticated, we use it
# in our SCP object.
set scp [new_CkScp]

set success [CkScp_UseSsh $scp $ssh]
if {$success != 1} then {
    puts [CkScp_lastErrorText $scp]
    delete_CkSsh $ssh
    delete_CkScp $scp
    exit
}

set remotePath "images/starfish.jpg"

# Download the binary file and return as a base64 string.
# See <a href="http://www.cknotes.com/chilkat-binary-encoding-list/">List of Encodings</a> for a list of possible encodings.
set encodedJpg [CkScp_downloadBinaryEncoded $scp $remotePath "base64"]
if {[CkScp_get_LastMethodSuccess $scp] != 1} then {
    puts [CkScp_lastErrorText $scp]
    delete_CkSsh $ssh
    delete_CkScp $scp
    exit
}

set remotePath "images/starfish2.jpg"

# Now upload from the base64 string to the SSH server.
# Insided the call to UploadBinaryEncoded, the base64 string is decoded,
# and the decoded bytes are uploaded.  The resulting starfish2.jpg on the
# server will be identical to the original starfish.jpg
set success [CkScp_UploadBinaryEncoded $scp $remotePath $encodedJpg "base64"]
if {$success != 1} then {
    puts [CkScp_lastErrorText $scp]
    delete_CkSsh $ssh
    delete_CkScp $scp
    exit
}

puts "SCP download/upload binary encoded success."

# Disconnect
CkSsh_Disconnect $ssh

delete_CkSsh $ssh
delete_CkScp $scp