在Node.js中使用条形码生成pdf [英] Generate pdf with barcode in Node.js

问题描述

我正在使用

我找到了可以生成的库

看起来不错，但看起来与普通的UPC-A条形码并不完全一样.

我在 http://www.fontpalace.com/font使用了字体-download/UPC-A/.

解决方案

我使用JSBarcode和Canvas在pdf中生成条形码.

您需要为此安装JSBarcode:

  npm install jsbarcode 

在PDF中生成条形码的代码:

  var canvas = document.createElement("canvas");JsBarcode(画布，"3000001"，{格式:"ean8"，高度:20，displayValue:否});doc.image(canvas.toDataURL()，10，10，height:30，width:130); 

I am using https://github.com/devongovett/pdfkit to generate PDF files which I can do simply with something like

app.get('/get-pdf', (req, res) => {
  const doc = new PDFDocument();
  const filename = 'my_pdf.pdf';

  res.setHeader('Content-disposition', 'attachment; filename="' + filename + '"');
  res.setHeader('Content-type', 'application/pdf');

  const content = "Some content";

  doc.y = 300;
  doc.text(content, 50, 50);
  doc.pipe(res);
  doc.end();
});

But I also want to generate an UPC-A barcode:

I have found the library https://github.com/lindell/JsBarcode which can generate such barcode from just the 12-digit code. However, it seems the library is mainly used in the client.

I want to generate a PDF with such barcode, but I don't know how to do it or if JsBarcode isn't too complex for just this single type of barcode.

Edit

As suggested in the comments, I did try to generate a the barcode with the UPC-A font:

app.get('/get-pdf', (req, res) => {
  const doc = new PDFDocument();
  const filename = 'my_pdf.pdf';

  res.setHeader('Content-disposition', 'attachment; filename="' + filename + '"');
  res.setHeader('Content-type', 'application/pdf');

  doc.font('/fonts/UPC-A.ttf').fontSize(50).text('012345678905');
  doc.pipe(res);
  doc.end();
});

from which I get

which does look good, but it doesn't look exactly like common UPC-A barcodes.

I used the font at http://www.fontpalace.com/font-download/UPC-A/.

解决方案

I used JSBarcode and Canvas to generate Barcode within pdf.

You need to install JSBarcode for this:

npm install jsbarcode

Code to generate barcode inside PDF:

var canvas = document.createElement("canvas");
JsBarcode(canvas, "3000001", {
    format: "ean8", height: 20,
    displayValue: false
});
doc.image(canvas.toDataURL(), 10, 10, height:30, width:130);

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