(MFC) PDF File Encoding to Base64

Demonstrates how to encode a PDF file to base64, and then decode.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkBinData.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkBinData pdfData;

    bool success = pdfData.LoadFile("qa_data/helloWorld.pdf");
    if (success != true) {
        strOut.append("failed to load PDF file.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Encode the PDF to base64
    // Note: to produce base64 on multiple lines (as it would appear in the MIME of an email),
    // pass the string "base64_mime" instead of "base64".
    const char *b64 = pdfData.getEncoded("base64");
    strOut.append(b64);
    strOut.append("\r\n");

    // Decode from base64 PDF.
    CkBinData pdfData2;
    pdfData2.AppendEncoded(b64,"base64");
    success = pdfData2.WriteFile("qa_output/helloWorld2.pdf");
    if (success != true) {
        strOut.append("failed to write PDF file.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }