Delphi ActiveX

Example: Http.SetUrlVar method

Demonstrates the HTTP SetUrlVar method. Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
http: TChilkatHttp;
url: WideString;
sbJson: TChilkatStringBuilder;
statusCode: Integer;

begin
success := 0;

http := TChilkatHttp.Create(Self);

url := 'https://finnhub.io/api/v1/quote?symbol={$symbol}&token={$api_key}';

// When the request is sent, the {$symbol} is replaced with "MSFT"
// and the {$api_key} is replaced with "1234567890ABCDEF"
http.SetUrlVar('symbol','MSFT');
http.SetUrlVar('api_key','1234567890ABCDEF');

sbJson := TChilkatStringBuilder.Create(Self);
success := http.QuickGetSb(url,sbJson.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

statusCode := http.LastStatus;
if (statusCode <> 200) then
  begin
    Memo1.Lines.Add('Status code: ' + IntToStr(statusCode));
    Memo1.Lines.Add('Error Message:');
    Memo1.Lines.Add(sbJson.GetAsString());
  end
else
  begin
    Memo1.Lines.Add('JSON Stock Quote:');
    Memo1.Lines.Add(sbJson.GetAsString());
  end;

// Output:

// JSON Stock Quote:
// {"c":522.98,"d":0.5,"dp":0.0957,"h":524.51,"l":520.86,"o":524.28,"pc":522.48,"t":1755271948}
end;