(Visual FoxPro) 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

LOCAL loChilkatGlob
LOCAL lnSuccess
LOCAL loTunnel
LOCAL lcSshHostname
LOCAL lnSshPort
LOCAL lnListenPort
LOCAL lnWaitForThreadExit

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Global')
loChilkatGlob = CreateObject('Chilkat.Global')
lnSuccess = loChilkatGlob.UnlockBundle("Anything for 30-day trial.")
IF (lnSuccess <> 1) THEN
    ? loChilkatGlob.LastErrorText
    RELEASE loChilkatGlob
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.SshTunnel')
loTunnel = CreateObject('Chilkat.SshTunnel')

lcSshHostname = "sftp.example.com"
lnSshPort = 22

* Connect to an SSH server and establish the SSH tunnel:
lnSuccess = loTunnel.Connect(lcSshHostname,lnSshPort)
IF (lnSuccess <> 1) THEN
    ? loTunnel.LastErrorText
    RELEASE loChilkatGlob
    RELEASE loTunnel
    CANCEL
ENDIF

* Authenticate with the SSH server via a login/password
* or with a public key.  
* This example demonstrates SSH password authentication.
lnSuccess = loTunnel.AuthenticatePw("mySshLogin","mySshPassword")
IF (lnSuccess <> 1) THEN
    ? loTunnel.LastErrorText
    RELEASE loChilkatGlob
    RELEASE loTunnel
    CANCEL
ENDIF

* 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.
loTunnel.DestPort = 1433
loTunnel.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.
lnListenPort = 3316
lnSuccess = loTunnel.BeginAccepting(lnListenPort)
IF (lnSuccess <> 1) THEN
    ? loTunnel.LastErrorText
    RELEASE loChilkatGlob
    RELEASE loTunnel
    CANCEL
ENDIF

* 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:
lnWaitForThreadExit = 1
lnSuccess = loTunnel.StopAccepting(lnWaitForThreadExit)
IF (lnSuccess <> 1) THEN
    ? loTunnel.LastErrorText
    RELEASE loChilkatGlob
    RELEASE loTunnel
    CANCEL
ENDIF

* Close the SSH tunnel (would also kick any remaining connected clients).
lnSuccess = loTunnel.CloseTunnel(lnWaitForThreadExit)
IF (lnSuccess <> 1) THEN
    ? loTunnel.LastErrorText
    RELEASE loChilkatGlob
    RELEASE loTunnel
    CANCEL
ENDIF

RELEASE loChilkatGlob
RELEASE loTunnel