Pascal (Lazarus/Delphi)

Send XMLHttpRequest and Get Response

See more HTTP Examples

Demonstrates how to send an HTTP XML request and retrieve the response. 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.HttpResponse,
  Chilkat.Http;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  xmlStr: string;
  urlEndpoint: string;
  xmlCharset: string;
  resp: THttpResponse;

begin
  success := False;

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

  http := THttp.Create;

  //  The XML sent in the body of the request is application
  //  specified -- it should contain whatever the server-side
  //  application is expecting..
  xmlStr := '<?xml version="1.0" encoding="UTF-8"?><appXml><something>123</something></appXml>';

  urlEndpoint := 'http://www.chilkatsoft.com/xmlEcho.asp';
  xmlCharset := 'utf-8';

  resp := THttpResponse.Create;
  success := http.HttpStr('POST',urlEndpoint,xmlStr,xmlCharset,'application/xml',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  The raw HTTP request sent by the above call is:

  //  POST /xmlEcho.asp HTTP/1.1
  //  Content-Type: text/xml
  //  Host: www.chilkatsoft.com
  //  Accept: */*
  //  Accept-Charset: ISO-8859-1,utf-8;q=0.7,*; q=0.7
  //  Accept-Language: en-us,en;q=0.5
  //  Accept-Encoding: gzip
  //  Content-Length: 81
  //  
  //  <?xml version="1.0" encoding="UTF-8"?><appXml><something>123</something></appXml>

  //  Examine the Body of the HTTP response
  //  This would be the XML response sent by the server.
  WriteLn(resp.BodyStr);


  http.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.