Package Exports

barcode-secure

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Readme

barcode generator

Generate 1D and 2D barcodes

Supported 1D types

Supported 2D types

QR Code (comming soon)
DataMatrix (comming soon)
PDF417 (comming soon)

Requirements

A working installation of GraphicsMagick.
node >= 0.10.0

Installing

npm install barcode

Usage

Set it up and specify your type and options. The following 3 are the only required ones.

var barcode = require('barcode');
var code39 = barcode('code39', {
    data: "it works",
    width: 400,
    height: 100,
});

Next choose from the three methods below how you want to output your barcode.

Stream

Get a stream of the final image data. you can collect this and save out a new PNG (default type), pipe it elsewhere, or save it to a CDN.

code39.getStream(function (err, readStream) {
    if (err) throw err;

    // 'readStream' is an instance of ReadableStream
    readStream.pipe(CdnWriteStream);
});

File to disk

Save an image out to the file system, pretty simple. Just be sure to specify your outfile.

var outfile = path.join(__dirname, 'imgs', 'mycode.png')
code39.saveImage(outfile, function (err) {
    if (err) throw err;

    console.log('File has been written!');
});

Base64 encoded img src

Often times, barcodes are single use for a single print or whatever. With this method, we can create one on the fly and just send the base64 encoded image to the browser through the HTML.

code39.getBase64(function (err, imgsrc) {
    if (err) throw err;

    // if we're using HTTP or another framework
    res.end('<img src="' + imgsrc + '">');
});

Refactor

Much of the underlying code for the generation is being rewritten, however the API will remain the same. As a rule, anything new will have to be testable.

Things todo:

Move all checksums and ECC to a module in lib/utils
Use the new barcode generation class: Barcode2D.js
Remove uses of Barcode1D and in-place image generation
Create separate functions for generating sequences

In the future:

Abstract drawing to be able to draw with gm or output html (bars with css or canvas)

License

The MIT License (MIT)