(MFC) 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 C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkBinData.h>
#include <CkGzip.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;
    bool success;

    http.put_BasicAuth(true);
    http.put_Login("API_USERNAME");
    http.put_Password("API_PASSWORD");

    // Build and send the following JSON:

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

    CkJsonObject json;
    json.UpdateString("merchid","MERCHANT_ID");
    json.UpdateString("retref","106631225001");

    // Load the .bmp containing a 200px x 100px signature.
    CkBinData bd;
    success = bd.LoadFile("qa_data/bmp/signature.bmp");
    // Gzip compress.
    CkGzip gzip;
    success = gzip.CompressBd(bd);
    // Add to the JSON in base64 format
    json.UpdateString("signature",bd.getEncoded("base64"));

    const char *url = "https://<site>.cardconnect.com:<port>/cardconnect/rest/sigcap";
    const char *responseStr = http.putText(url,json.emit(),"utf-8","application/json",false,false);
    if (http.get_LastMethodSuccess() == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // 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.
    strOut.append("response status code = ");
    strOut.appendInt(http.get_LastStatus());
    strOut.append("\r\n");

    CkJsonObject jsonResp;
    jsonResp.Load(responseStr);
    jsonResp.put_EmitCompact(false);

    strOut.append("response JSON:");
    strOut.append("\r\n");
    strOut.append(jsonResp.emit());
    strOut.append("\r\n");

    // A successful response looks like this:

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }