Unicode C++

Decode Base64 Image String (GIF, JPG, etc.) and Save to File

I have an XML response that includes a base 64 encoded image string (UPS label). It's a huge string and I need to save it as a gif file on my users pc.

This example shows how to do it..

Unicode C++

#include <CkBinDataW.h>
#include <CkXmlW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkBinDataW bd;

    //  I created an extra-small GIF image for this example..
    success = bd.LoadFile(L"qa_data/gif/xsmall.gif");
    if (success != true) {
        wprintf(L"Failed to load GIF image file.\n");
        return;
    }

    //  Show GIF bytes as base64:
    wprintf(L"%s\n",bd.getEncoded(L"base64"));

    //  This particular GIF in base64 is this:
    //  R0lGODlhBQAFAMQAAAAAAP////z8/PHx8evr6+jo6OHh4d7e3sPDw8LCwpqamo2NjWxsbGRkZFpaWk1NTUtLS0hISCwsLCQkJP///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAFAAUAAAUTYCAYQUBAU1lI0TIgztE8jFImIQA7

    //  Let's begin with an XML string:
    const wchar_t *x = L"<abc><def>R0lGODlhBQAFAMQAAAAAAP////z8/PHx8evr6+jo6OHh4d7e3sPDw8LCwpqamo2NjWxsbGRkZFpaWk1NTUtLS0hISCwsLCQkJP///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAFAAUAAAUTYCAYQUBAU1lI0TIgztE8jFImIQA7</def></abc>";

    CkXmlW xml;
    success = xml.LoadXml(x);

    //  Get the base64 string:
    const wchar_t *gifBase64 = xml.getChildContent(L"def");

    wprintf(L"%s\n",gifBase64);

    //  Load bd with the base64 decoded bytes.  
    bd.Clear();
    bd.AppendEncoded(gifBase64,L"base64");

    //  Save to a GIF file.
    success = bd.WriteFile(L"qa_output/xsmall.gif");
    }