(Delphi ActiveX) REST through SSH Tunnel

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

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
tunnel: TChilkatSocket;
sshHostname: WideString;
sshPort: Integer;
success: Integer;
rest: TChilkatRest;
channel: IChilkatSocket;
bTls: Integer;
port: Integer;
maxWaitMs: Integer;
authAws: TChilkatAuthAws;
responseXml: WideString;
xml: TChilkatXml;

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

tunnel := TChilkatSocket.Create(Self);

sshHostname := 'sftp.example.com';
sshPort := 22;

// Connect to an SSH server and establish the SSH tunnel:
success := tunnel.SshOpenTunnel(sshHostname,sshPort);
if (success <> 1) then
  begin
    Memo1.Lines.Add(tunnel.LastErrorText);
    Exit;
  end;

// Authenticate with the SSH server via a login/password
// or with a public key.
// This example demonstrates SSH password authentication.
success := tunnel.SshAuthenticatePw('mySshLogin','mySshPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(tunnel.LastErrorText);
    Exit;
  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.
rest := TChilkatRest.Create(Self);

bTls := 1;
port := 443;
maxWaitMs := 5000;

// This returns a socket object that is a single channel within the SSH tunnel.
channel := tunnel.SshOpenChannel('s3.amazonaws.com',port,bTls,maxWaitMs);
if (tunnel.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(tunnel.LastErrorText);
    Exit;
  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.)
success := rest.UseConnection(channel,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);

    Exit;
  end;

// Provide AWS credentials for the REST call.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
authAws.ServiceName := 's3';
success := rest.SetAuthAws(authAws.ControlInterface);

// List all buckets for the account...
responseXml := rest.FullRequestNoBody('GET','/');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);

    Exit;
  end;

xml := TChilkatXml.Create(Self);
success := xml.LoadXml(responseXml);

// Show the full XML returned.
Memo1.Lines.Add(xml.GetXml());

// Iterate over the buckets, showing each bucket name.
success := xml.FindChild2('Buckets');
if (xml.FirstChild2() = 1) then
  begin
    Memo1.Lines.Add(xml.GetChildContent('Name'));
    while (xml.NextSibling2() = 1) do
      begin
        Memo1.Lines.Add(xml.GetChildContent('Name'));
      end;

  end;
// Move the internal pointer back to the root node.
xml.GetRoot2();
end;