SSH Tunnel using an HTTP proxy

Demonstrates how to establish an SSH tunnel that uses an HTTP proxy.

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import sys
import chilkat

sshTunnel = chilkat.CkSshTunnel()

success = sshTunnel.UnlockComponent("30-day trial")
if (success != True):
    print sshTunnel.lastErrorText()
    sys.exit()

#  The DestHostname / DestPort is the server with which we
#  are ultimately communicating.
sshTunnel.put_DestPort(1433)
sshTunnel.put_DestHostname("myServer.com")

#  Provide information about the location of the SSH server,
#  and the authentication to be used with it. This is the
#  login information for the SSH server.
sshTunnel.put_SshHostname("192.168.1.108")
sshTunnel.put_SshPort(22)
sshTunnel.put_SshLogin("mySshLogin")
sshTunnel.put_SshPassword("mySshPassword")

#  To connect through an HTTP proxy, set the HttpProxyHostname
#  and HttpProxyPort properties to the hostname (or IP address)
#  and port of the HTTP proxy.  Typical port numbers used by
#  HTTP proxy servers are 3128 and 8080.
sshTunnel.put_HttpProxyHostname("www.my-http-proxy.com")
sshTunnel.put_HttpProxyPort(3128)

#  Important:  Your HTTP proxy server must allow non-HTTP
#  traffic to pass.  Otherwise this does not work.

#  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.
listenPort = 3316
success = sshTunnel.BeginAccepting(listenPort)
if (success != True):
    print sshTunnel.lastErrorText()
    sys.exit()

#  At this point you may write code to communicate with
#  the server at DestHostname/DestPort.  This could be anything --
#  it could be WinSock, ADO/ODBC code, Chilkat Socket, etc.
#  However, instead of connecting directly to DestHostname/DestPort,
#  your code would connect to localhost:3316 (because this
#  is the listenPort of the SSH Tunnel

#  This is what happens when you connect to localhost:3316
#  1) The connection is accepted by the SSH tunnel
#      background thread (which was started in the call to BeginAccepting).
#  2) In the background thread, a connection to a remote SSH
#      server is established via an HTTP proxy.
#  3) Port-forwarding is setup so that the remote SSH server connects
#     to the DestHostname/DestPort.
#  4) Data sent by your application to localhost:3316 is ultimately forwarded to DestHostname/DestPort
#   5) Data sent back from DestHostname/DestPort is forwarded back and received by your application

#  When you're finished with the  connection, you may
#  stop the background tunnel threads:
#  Stop the background thread that accepts new connections:
success = sshTunnel.StopAccepting()
if (success != True):
    print sshTunnel.lastErrorText()
    sys.exit()

#  If any background tunnels are still in existence (and managed
#  by a single SSH tunnel pool background thread), stop them...
maxWaitMs = 1000
success = sshTunnel.StopAllTunnels(maxWaitMs)
if (success != True):
    print sshTunnel.lastErrorText()
    sys.exit()