Node.js

Read/Write JSON with Binary Data such as JPEG Files

See more JSON Examples

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  First load a small JPG file..
    var bd = new chilkat.BinData();

    success = bd.LoadFile("qa_data/jpg/starfish20.jpg");
    //  Assume success, but your code should check for success..

    //  Create JSON containing the binary data in base64 format.
    var json1 = new chilkat.JsonObject();
    json1.UpdateBd("starfish","base64",bd);

    var jsonStr = json1.Emit();
    console.log(jsonStr);

    //  Here's the output:
    //  {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

    //  Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
    var json2 = new chilkat.JsonObject();
    json2.Load(jsonStr);

    //  Get the binary bytes.
    var bd2 = new chilkat.BinData();
    json2.BytesOf("starfish","base64",bd2);

    //  Save to a file.
    success = bd2.WriteFile("qa_output/starfish20.jpg");

    console.log("Success.");

}

chilkatExample();