Pascal (Lazarus/Delphi)

Demonstrates the Http.QuickRequestParams Method

See more HTTP Examples

Demonstrates how to use the Http.QuickRequestParams method. This is where query params can be provided non-URL-encoded in JSON format. 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.FileAccess,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  queryParams: TJsonObject;
  sessionLogPath: string;
  resp: THttpResponse;
  fac: TFileAccess;
  sessionLog: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Demonstrate sending a GET request with query parameters.
  queryParams := TJsonObject.Create;
  queryParams.UpdateInt('limit',100);
  queryParams.UpdateString('email','joe@example.com');
  queryParams.UpdateString('token','VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wZWQgb3ZlciB0aGUgbGF6eSBkb2cuLi4=');

  //  Set a session log filename so we can examine the exact request that is sent.
  sessionLogPath := 'qa_output/sessionLog.txt';
  http.SessionLogFilename := sessionLogPath;

  //  Send the GET request to an endpoint.  We don't care about the response. The purpose of this example
  //  is to see the exact HTTP request that is sent..
  resp := THttpResponse.Create;
  success := http.HttpParams('GET','https://www.chilkatsoft.com/echoPostBody.asp',queryParams,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  fac := TFileAccess.Create;
  sessionLog := fac.ReadEntireTextFile(sessionLogPath,'utf-8');
  WriteLn(sessionLog);
  success := fac.FileDelete(sessionLogPath);

  //  This is the exact GET request that was sent.
  //  Notice how each query parameter is URL encoded and added to the HTTP start line of the request.

  //  GET /echoPostBody.asp?limit=100&email=joe%40example.com&token=VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wZWQgb3ZlciB0aGUgbGF6eSBkb2cuLi4%3D HTTP/1.1
  //  Host: www.chilkatsoft.com
  //  Accept: */*
  //  Accept-Encoding: gzip


  http.Free;
  queryParams.Free;
  resp.Free;
  fac.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.