barcode generator
Generate 1D and 2D barcodes
Supported 1D types
Supported 2D types
Requirements
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.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;
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)