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DataFlex Examples

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(DataFlex) REST through SSH Tunnel

Demonstrates how to connect through an SSH Tunnel (via port-forwarding) to make REST API calls.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoTunnel
    String sSshHostname
    Integer iSshPort
    Boolean iSuccess
    Handle hoRest
    Variant vChannel
    Handle hoChannel
    Boolean iBTls
    Integer iPort
    Integer iMaxWaitMs
    Variant vAuthAws
    Handle hoAuthAws
    String sResponseXml
    Handle hoXml
    String sTemp1
    Boolean bTemp1

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

    Get Create (RefClass(cComChilkatSocket)) To hoTunnel
    If (Not(IsComObjectCreated(hoTunnel))) Begin
        Send CreateComObject of hoTunnel
    End

    Move "sftp.example.com" To sSshHostname
    Move 22 To iSshPort

    // Connect to an SSH server and establish the SSH tunnel:
    Get ComSshOpenTunnel Of hoTunnel sSshHostname iSshPort To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Authenticate with the SSH server via a login/password
    // or with a public key.
    // This example demonstrates SSH password authentication.
    Get ComSshAuthenticatePw Of hoTunnel "mySshLogin" "mySshPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  OK, the SSH tunnel is setup.  Now open a channel within the tunnel.
    //  (Any number of channels may be created from the same SSH tunnel.
    //  Multiple channels may coexist at the same time.)

    // This example connects to a REST server through the SSH tunnel.
    // It will connect to the Amazon AWS service for this example.
    Get Create (RefClass(cComChilkatRest)) To hoRest
    If (Not(IsComObjectCreated(hoRest))) Begin
        Send CreateComObject of hoRest
    End

    Move True To iBTls
    Move 443 To iPort
    Move 5000 To iMaxWaitMs

    // This returns a socket object that is a single channel within the SSH tunnel.
    Get ComSshOpenChannel Of hoTunnel "s3.amazonaws.com" iPort iBTls iMaxWaitMs To vChannel
    If (IsComObject(vChannel)) Begin
        Get Create (RefClass(cComChilkatSocket)) To hoChannel
        Set pvComObject Of hoChannel To vChannel
    End
    Get ComLastMethodSuccess Of hoTunnel To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Use the connection.  (This connection is a TLS running on an SSH channel through an SSH tunnel.
    // In other words, TLS is wrapped within the SSH tunnel.)
    Get ComUseConnection Of hoRest vChannel True To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Send Destroy of hoChannel
        Procedure_Return
    End

    // Provide AWS credentials for the REST call.
    Get Create (RefClass(cComChilkatAuthAws)) To hoAuthAws
    If (Not(IsComObjectCreated(hoAuthAws))) Begin
        Send CreateComObject of hoAuthAws
    End
    Set ComAccessKey Of hoAuthAws To "AWS_ACCESS_KEY"
    Set ComSecretKey Of hoAuthAws To "AWS_SECRET_KEY"
    Set ComServiceName Of hoAuthAws To "s3"
    Get pvComObject of hoAuthAws to vAuthAws
    Get ComSetAuthAws Of hoRest vAuthAws To iSuccess

    // List all buckets for the account...
    Get ComFullRequestNoBody Of hoRest "GET" "/" To sResponseXml
    Get ComLastMethodSuccess Of hoRest To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Send Destroy of hoChannel
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatXml)) To hoXml
    If (Not(IsComObjectCreated(hoXml))) Begin
        Send CreateComObject of hoXml
    End
    Get ComLoadXml Of hoXml sResponseXml To iSuccess

    // Show the full XML returned.
    Get ComGetXml Of hoXml To sTemp1
    Showln sTemp1

    // Iterate over the buckets, showing each bucket name.
    Get ComFindChild2 Of hoXml "Buckets" To iSuccess
    Get ComFirstChild2 Of hoXml To bTemp1
    If (bTemp1 = True) Begin
        Get ComGetChildContent Of hoXml "Name" To sTemp1
        Showln sTemp1
        While ((ComNextSibling2(hoXml)) = True)
            Get ComGetChildContent Of hoXml "Name" To sTemp1
            Showln sTemp1
        Loop

    End

    // Move the internal pointer back to the root node.
    Send ComGetRoot2 To hoXml

    Send Destroy of hoChannel


End_Procedure

 

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