Lazarus Pascal

REST Auto Reconnect for Multiple Requests (dev.markitondemand.com)

See more REST Examples

Demonstrates how the autoReconnect argument to the Connect method is used. Lazarus Pascal

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.Rest,
  Chilkat.Xml;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  responseXml: string;
  xml: TXml;

begin
  success := False;

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

  rest := TRest.Create;

  //  This example demonstrates the usage of the autoReconnect argument to the Connect method.
  //  When autoReconnect is on, subsequent REST method calls will automatically re-connect
  //  if necessary, using the same information (domain/IP address, port number, and TLS).
  bTls := False;
  port := 80;
  bAutoReconnect := True;
  success := rest.Connect('dev.markitondemand.com',port,bTls,bAutoReconnect);

  //  Get a stock quote:
  success := rest.AddQueryParam('symbol','AAPL');
  responseXml := rest.FullRequestNoBody('GET','/MODApis/Api/v2/Quote');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  xml := TXml.Create;
  success := xml.LoadXml(responseXml);
  WriteLn('AAPL LastPrice: ' + xml.GetChildContent('LastPrice'));

  //  Get another stock quote.  If a new HTTP connection is required,
  //  the REST object will automatically connect using the same parameters.
  success := rest.AddQueryParam('symbol','AMZN');
  responseXml := rest.FullRequestNoBody('GET','/MODApis/Api/v2/Quote');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  success := xml.LoadXml(responseXml);
  WriteLn('AMZN LastPrice: ' + xml.GetChildContent('LastPrice'));


  rest.Free;
  xml.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.