(Delphi ActiveX) CardConnect Signature Capture

Demonstrates how to upload a BMP image of a handwritten signature.

This signature capture service augments an existing authorization record with the provided signature data. ...

See https://developer.cardconnect.com/cardconnect-api?lang=json#signature-capture

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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
http: TChilkatHttp;
success: Integer;
json: TChilkatJsonObject;
bd: TChilkatBinData;
gzip: TChilkatGzip;
url: WideString;
responseStr: WideString;
jsonResp: TChilkatJsonObject;

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

http := TChilkatHttp.Create(Self);

http.BasicAuth := 1;
http.Login := 'API_USERNAME';
http.Password := 'API_PASSWORD';

// Build and send the following JSON:

// {
//   "merchid": "MERCHANT_ID",
//   "retref": "112989260941",
//   "signature": "BASE64_GZIPPED_BMP_DATA"
// }

json := TChilkatJsonObject.Create(Self);
json.UpdateString('merchid','MERCHANT_ID');
json.UpdateString('retref','106631225001');

// Load the .bmp containing a 200px x 100px signature.
bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/bmp/signature.bmp');
// Gzip compress.
gzip := TChilkatGzip.Create(Self);
success := gzip.CompressBd(bd.ControlInterface);
// Add to the JSON in base64 format
json.UpdateString('signature',bd.GetEncoded('base64'));

url := 'https://<site>.cardconnect.com:<port>/cardconnect/rest/sigcap';
responseStr := http.PutText(url,json.Emit(),'utf-8','application/json',0,0);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// A response status of 200 indicates potential success.  The JSON response body
// must be examined to determine if it was truly successful or an error.
Memo1.Lines.Add('response status code = ' + IntToStr(http.LastStatus));

jsonResp := TChilkatJsonObject.Create(Self);
jsonResp.Load(responseStr);
jsonResp.EmitCompact := 0;

Memo1.Lines.Add('response JSON:');
Memo1.Lines.Add(jsonResp.Emit());

// A successful response looks like this:

// {
//   "resptext": "signature stored",
//   "retref": "106631225001",
//   "respcode": "02",
//   "merchid": "MERCHANT_ID"
// }
end;