Codes
Notice that I am not the author of the code, I am just the creator of an npm module out of the great library from https://code.google.com/p/bwip-js/.
Install
npm install rescode
Barcode or Code types available
ean2, ean5, ean8, upca, upce, isbn, ismn, issm, code128, gs1-128, ean13, sscc18, code39, code39ext, code32, pzn, code93, code93ext, interleaved2of5, itf14, identcode, leitcode, databaromni, databarstacked, databarstackedomni, databartruncated, databarlimited, databarexpanded, databarexpandedstacked, pharmacode, pharmacode2, code2of5, code11, bc412, rationalizedCodabar, onecode, postnet, planet, royalmail, auspost, kix, japanpost, msi, plessey, telepen, posicode, codablockf, code16k, code49, channelcode, flattermarken, raw, daft, symbol, pdf417, micropdf417, datamatrix, qrcode, maxicode, azteccode, codeone, gs1-cc, ean13composite, ean8composite, upcacomposite, upcecomposite, databaromnicomposite, databarstackedcomposite, databarstackedomnicomposite, databartruncatedcomposite, databarlimitedcomposite, databarexpandedcomposite, databarexpandedstackedcomposite, gs1-128composite, gs1datamatrix, hibccode39, hibccode128, hibcdatamatrix, hibcpdf417, hibcmicropdf417, hibcqrcode, hibccodablockf
Example loading specific barcode types
var codes = require("rescode");
function( res, req )
{
// Sequence is important
codes.loadModules(["ean2", "ean5", "ean8", "ean13"]);
var data8 = codes.create("ean8","12345678");
res.setHeader("Content-Type","image/png");
res.end( data8 );
OR
res.end("<html><img src='data:image/png;base64,"+data8.toString("base64")+"' /></html>");
}
Example loading ean barcode types and setting specific options
var codes = require("rescode");
function( res, req )
{
codes.loadModules(["ean2", "ean5"]);
codes.loadModules(["ean8"], { "includetext":false, "guardwhitespace":false, "inkspread":0, scaleX:3, textyoffset:-15 });
codes.loadModules(["ean13"]);
var data8 = codes.create("ean8","12345678");
res.setHeader("Content-Type","image/png");
res.end( data8 );
OR
res.end("<html><img src='data:image/png;base64,"+data8.toString("base64")+"' /></html>");
}
Example loading qrcode
var codes = require("rescode");
function( res, req )
{
// Level L - 7% of codewords can be restored
// Level M - 15% of codewords can be restored
// Level Q - 25% of codewords can be restored
// Level H - 30% of codewords can be restored
// IMPORTANT white padding around qrcode
// CREATE
codes.loadModules(["qrcode"], { "eclevel":"M" , "version": "4", "scaleX": 2, "scaleY": 2} );
var data = codes.create("qrcode","http://npmjs.org");
OR
codes.loadModules(["qrcode"]);
var data = codes.create("qrcode","http://npmjs.org", { "eclevel":"M" , "version": "4", "scaleX": 2, "scaleY": 2} );
// SHOW
res.setHeader("Content-Type","image/png");
res.end( data );
OR
res.end("<html><img src='data:image/png;base64,"+data.toString("base64")+"' /></html>");
}
Configure
Choose in lib/codes.js the Adatper PNG ( binary png ) or Canvas ( dataURL (smaller size), but canvas has to be installed )
Thanks
To Jens Olsson for dynamic loading of the libraries