Lazarus Pascal

QuickDeleteStr Example

Sends a DELETE request to a URL. The URL can potentially include params, and custom request headers can be added. 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.Http;

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

procedure RunDemo;
var
  http: THttp;
  statusCode: Integer;
  url: string;
  reponseBodyStr: string;

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

  http := THttp.Create;

  //  Specifiy a session log file so we can see the exact request/response
  http.SessionLogFilename := 'c:/aaworkarea/sessionLog.txt';

  //  Perhaps add a custom header or two..
  http.SetRequestHeader('x-exz-date','20201012T235046Z');
  http.SetRequestHeader('x-exz-id','1234');

  //  Send a DELETE request to https://www.example.com/someting?param1=123&param2=abc
  url := 'https://www.example.com/someting?param1=123&param2=abc';
  reponseBodyStr := http.QuickDeleteStr(url);
  if (http.LastMethodSuccess = False) then
    begin
      //  This will happen if the response status code was 400 or greater,
      //  or if the request could not be sent, or if no response was received.
      statusCode := http.LastStatus;
      WriteLn('Response status: ' + statusCode);

      if (statusCode = 0) then
        begin
          //  There was an error in communications.  
          WriteLn(http.LastErrorText);
        end
      else
        begin
          //  We received a response status code indicating failure.
          //  Examine the response body.
          WriteLn(http.LastResponseBody);
        end;

      Exit;
    end;

  //  The DELETE request that is sent looks like this.
  //  The Accept and Accept-Encoding headers are automatically added by default.

  //  	DELETE /someting?param1=123&param2=abc HTTP/1.1
  //  	Host: www.example.com
  //  	Accept: */*
  //  	Accept-Encoding: gzip
  //  	x-exz-date: 20201012T235046Z
  //  	x-exz-id: 1234

  //  Get the response status
  statusCode := http.LastStatus;
  WriteLn('Response status: ' + statusCode);

  //  Show the response body
  WriteLn(reponseBodyStr);


  http.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.