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Node.js Examples

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(Node.js) Gzip Compress In Memory and Base64 Encode

Demonstrates how to Gzip compress in-memory data and then encode the compressed data to base64.

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-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    var gzip = new chilkat.Gzip();

    var success = gzip.UnlockComponent("Anything for 30-day trial");
    if (success !== true) {
        console.log(gzip.LastErrorText);
        return;
    }

    // This example will load a file into the fileData object.
    // Your application might load fileData from other sources..
    var fileData = new chilkat.BinData();
    success = fileData.LoadFile("qa_data/xml/hamlet.xml");
    if (success !== true) {
        console.log("Failed to load file.");
        return;
    }

    // In-place compress the contents of fileData
    success = gzip.CompressBd(fileData);
    if (success !== true) {
        console.log(gzip.LastErrorText);
        return;
    }

    // Get the base64 encoded compressed data (in a single line).
    var strBase64 = fileData.GetEncoded("base64");
    console.log(strBase64);
    console.log("--------");

    // To get the base64 in multiple lines, as it might appear in MIME,
    // use "base64-mime".
    var strBase64MultiLine = fileData.GetEncoded("base64-mime");
    console.log(strBase64MultiLine);

}

chilkatExample();

 

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