AutoIt

SSH Tunnel (Port Forwarding via direct-tcpip channel)

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Demonstrates how to create an SSH tunnel to a remote hostname:port via a direct-tcpip channel. AutoIt

Local $bSuccess = False

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

$oSsh = ObjCreate("Chilkat.Ssh")

; Connect to an SSH server:
Local $sHostname
Local $iPort

; Hostname may be an IP address or hostname:
$sHostname = "192.168.1.117"
$iPort = 22

$bSuccess = $oSsh.Connect($sHostname,$iPort)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Wait a max of 5 seconds when reading responses..
$oSsh.IdleTimeoutMs = 5000

; Authenticate using login/password:
$bSuccess = $oSsh.AuthenticatePw("chilkat","myPassword")
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Open a direct-tcpip channel.  We want the SSH server to connect
; to www.chilkatsoft.com, port 80 (i.e. the web server).
; Data sent through the SSH tunnel is forwarded to the remote
; host:port.  (Note: The remote host:port does not need to be 
; a web server.  It can be anything.  It can be your own
; customer application server that listens on a port, or any
; other type of server.)
; When we read from the SSH channel, we'll be reading data
; sent from the remote host:port (i.e. the web server in this
; example).
Local $iChannelNum
$iChannelNum = $oSsh.OpenDirectTcpIpChannel("www.chilkatsoft.com",80)
If ($iChannelNum < 0) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Build a simple HTTP GET request for http://www.chilkatsoft.com/xyz.html
Local $sHttpReq = "GET /xyz123.html HTTP/1.1" & @CRLF & "Host: www.chilkatsoft.com" & @CRLF & @CRLF

; Send the HTTP request:
$bSuccess = $oSsh.ChannelSendString($iChannelNum,$sHttpReq,"ansi")
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Get the HTTP response.
; First read the HTTP response header which ends with a double CRLF.
; Calling ChannelReceiveUntilMatch will receive until match string is seen,
; or until a timeout occurs (IdleTimeoutMs property).  ChannelReceiveUntilMatch
; may read beyond the match string, but it will stop reading as soon as the match
; string is seen.
Local $bCaseSensitive = False
Local $sMatchStr = @CRLF & @CRLF
$bSuccess = $oSsh.ChannelReceiveUntilMatch($iChannelNum,$sMatchStr,"ansi",$bCaseSensitive)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Extract the HTTP header from the receive buffer.
; (GetReceiveTextS extracts up to and including the match string from the receive buffer)
Local $sResponseHeader
$sResponseHeader = $oSsh.GetReceivedTextS($iChannelNum,$sMatchStr,"ansi")
ConsoleWrite("---- HTTP Response Header ----" & @CRLF)
ConsoleWrite($sResponseHeader & @CRLF)

; Now get the body of the HTTP response (this is the HTML content
; of http://www.chilkatsoft.com/xyz.html
; It's possible we've already received the entire HTTP response in the
; call to ChannelReceiveUntilMatch.  Therefore, we'll poll for any remaining data
; and wait a max of .2 seconds.
Local $iNumBytesRead
Local $iPollTimeoutMs = 200
$iNumBytesRead = $oSsh.ChannelPoll($iChannelNum,$iPollTimeoutMs)
; We're not checking for an error here.
; A return value of -2 means that no data was available and the poll simply timed out (not an error)
; A return value of -1 indicates an error.
; A return value greater than 0 indicates that additional data was received.

ConsoleWrite("---- HTML BODY ----" & @CRLF)

; Extract the remainder of the accumulated data in the internal receive buffer.
; This should be our HTML body:
Local $sHtmlBody
$sHtmlBody = $oSsh.GetReceivedText($iChannelNum,"ansi")
ConsoleWrite($sHtmlBody & @CRLF)

; Close the channel:
$bSuccess = $oSsh.ChannelSendClose($iChannelNum)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Disconnect
$oSsh.Disconnect