(PowerBuilder) SSH Tunnel for Database Connection (such as ADO, ODBC, JDBC, etc.)

Demonstrates how to create an SSH tunneling client in a background thread of your application. This makes it possible to SSH tunnel database connections without the need for separate software (such as PuTTY) to be running.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_ChilkatGlob
integer li_Success
oleobject loo_Tunnel
string ls_SshHostname
integer li_SshPort
integer li_ListenPort
integer li_WaitForThreadExit

loo_ChilkatGlob = create oleobject
// Use "Chilkat_9_5_0.Global" for versions of Chilkat < 10.0.0
li_rc = loo_ChilkatGlob.ConnectToNewObject("Chilkat.Global")
if li_rc < 0 then
    destroy loo_ChilkatGlob
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_ChilkatGlob.UnlockBundle("Anything for 30-day trial.")
if li_Success <> 1 then
    Write-Debug loo_ChilkatGlob.LastErrorText
    destroy loo_ChilkatGlob
    return
end if

loo_Tunnel = create oleobject
// Use "Chilkat_9_5_0.SshTunnel" for versions of Chilkat < 10.0.0
li_rc = loo_Tunnel.ConnectToNewObject("Chilkat.SshTunnel")

ls_SshHostname = "sftp.example.com"
li_SshPort = 22

// Connect to an SSH server and establish the SSH tunnel:
li_Success = loo_Tunnel.Connect(ls_SshHostname,li_SshPort)
if li_Success <> 1 then
    Write-Debug loo_Tunnel.LastErrorText
    destroy loo_ChilkatGlob
    destroy loo_Tunnel
    return
end if

// Authenticate with the SSH server via a login/password
// or with a public key.  
// This example demonstrates SSH password authentication.
li_Success = loo_Tunnel.AuthenticatePw("mySshLogin","mySshPassword")
if li_Success <> 1 then
    Write-Debug loo_Tunnel.LastErrorText
    destroy loo_ChilkatGlob
    destroy loo_Tunnel
    return
end if

// The destination host/port is the database server.
// The DestHostname may be the domain name or 
// IP address (in dotted decimal notation) of the database
// server.
loo_Tunnel.DestPort = 1433
loo_Tunnel.DestHostname = "myDbServer.com"

// Start accepting connections in a background thread.
// The SSH tunnels are autonomously run in a background
// thread.  There is one background thread for accepting
// connections, and another for managing the tunnel pool.
li_ListenPort = 3316
li_Success = loo_Tunnel.BeginAccepting(li_ListenPort)
if li_Success <> 1 then
    Write-Debug loo_Tunnel.LastErrorText
    destroy loo_ChilkatGlob
    destroy loo_Tunnel
    return
end if

// At this point the app may connect to the database server through
// the SSH tunnel.  The database connection string would
// use "localhost" for the hostname and 3316 for the port.
// We're not going to show the database coding here,
// because it can vary depending on the API you're using
// (ADO, ODBC, OLE DB, etc. )

// This is where the application's database code would go...

// Stop the background listen/accept thread:
li_WaitForThreadExit = 1
li_Success = loo_Tunnel.StopAccepting(li_WaitForThreadExit)
if li_Success <> 1 then
    Write-Debug loo_Tunnel.LastErrorText
    destroy loo_ChilkatGlob
    destroy loo_Tunnel
    return
end if

// Close the SSH tunnel (would also kick any remaining connected clients).
li_Success = loo_Tunnel.CloseTunnel(li_WaitForThreadExit)
if li_Success <> 1 then
    Write-Debug loo_Tunnel.LastErrorText
    destroy loo_ChilkatGlob
    destroy loo_Tunnel
    return
end if



destroy loo_ChilkatGlob
destroy loo_Tunnel