Pascal (Lazarus/Delphi)

Duplicate curl -u user:password with Chilkat HTTP

See more HTTP Misc Examples

Demonstrates how to duplicate a curl command that uses the -u username:password option. (This assumes HTTP Basic Authentication, and Chilkat requires Basic authentication to be over a TLS connection.)

Duplicates the following curl command:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.HttpRequest,
  Chilkat.HttpResponse;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  req: THttpRequest;
  resp: THttpResponse;

begin
  success := False;

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

  http := THttp.Create;
  req := THttpRequest.Create;

  //  The AddHeader method corresponds to the curl "-H" argument.
  req.AddHeader('Accept','application/json');
  req.AddHeader('Accept-Language','en_US');

  //  The curl "-d" argument specifies the HTTP request body.  In this case,
  //  we're sending an application/x-www-form-urlencoded request, and therefore
  //  the body contains the URL-encoded query parameters.
  req.AddParam('grant_type','client_credentials');

  http.Login := 'PAYPAL_REST_API_CLIENT_ID';
  http.Password := 'PAYPAL_REST_API_SECRET';

  //  Sends a POST request where the Content-Type is application/x-www-form-urlencoded
  req.HttpVerb := 'POST';
  req.ContentType := 'application/x-www-form-urlencoded';

  resp := THttpResponse.Create;
  success := http.HttpReq('https://api.sandbox.paypal.com/v1/oauth2/token',req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  if (resp.StatusCode <> 200) then
    begin
      WriteLn('Error status code: ' + resp.StatusCode);
      WriteLn(resp.BodyStr);
      Exit;
    end;

  //  The JSON response is in the resp BodyStr property
  WriteLn(resp.BodyStr);
  WriteLn('-- Success.');


  http.Free;
  req.Free;
  resp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.