(Node.js) Demonstrate Binary Data Encoding Methods

Demonstrates binary data encoding methods.

Note: This example requires Chilkat v9.5.0.64 or later.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    var binData = new chilkat.BinData();

    // Append 10 bytes: 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
    binData.AppendEncoded("00010203040506070809","hex");

    // Show that binData contains 10 bytes.
    console.log("num bytes = " + binData.NumBytes);

    // Get as base64
    console.log("base64: " + binData.GetEncoded("base64"));

    // Get a chunk of the binary data.
    // The 1st byte is at index 0.
    // The output should be "02030405"
    var offset = 2;
    var numBytes = 4;
    console.log("chunk: " + binData.GetEncodedChunk(offset,numBytes,"hex"));

    // Copy the bytes to a StringBuilder using the base64url encoding
    var sb = new chilkat.StringBuilder();
    binData.GetEncodedSb("base64url",sb);
    console.log("base64url: " + sb.GetAsString());

    // Remove a chunk from the binary data
    offset = 2;
    numBytes = 4;
    binData.RemoveChunk(offset,numBytes);
    // The bytes remaining are 00,01,06,07,08,and 09
    console.log("after removing chunk: " + binData.GetEncoded("hex"));

}

chilkatExample();