(Tcl) SCP Download/Upload Binary Files as Encoded Strings

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

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load ./chilkat.dll

# 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