Loading and capturing PDF content with Phantomjs headless browser

Other Questions Headless Browser
1

Hey everyone, I’m trying to figure out how to work with PDFs using Phantomjs. I’ve got a PDF stored on an S3 server, and I want to open it and take some screenshots. But I’m running into issues. Every time I try, I get a ‘fail’ status.

Here’s a snippet of what I’ve tried:

var page = require('webpage').create();
var pdfUrl = 'https://example-storage.com/docs/sample.pdf'; 

page.open(pdfUrl, function(result) {
  if (result !== 'success') {
    console.log('Failed to load PDF');
    phantom.exit();
  } 
  console.log('PDF loaded successfully');
  phantom.exit();
});

I’ve looked through the Phantomjs docs but couldn’t find anything specific about handling PDFs. My end goal is to take screenshots of the PDF pages and then add an overlay image using jQuery. Is this doable with just Phantomjs and jQuery? Any tips or pointers would be super helpful!

2

I’ve grappled with PDFs in PhantomJS too, and it can be a real headache. One approach that worked for me was using a PDF.js renderer in combination with PhantomJS. It’s a bit more complex, but it gives you better control over the PDF content.

Here’s a rough idea of how you could approach it:

  1. Use PDF.js to render the PDF into a canvas
  2. Capture the canvas content with PhantomJS
  3. Use page.evaluate() to inject jQuery and add your overlay

Keep in mind that this method requires some additional setup and might be slower than direct PDF handling. Also, as others mentioned, PhantomJS is outdated. If you’re starting a new project, I’d strongly recommend looking into more modern tools like Puppeteer or Playwright. They offer better PDF support out of the box and are actively maintained.

3

I’ve encountered similar issues with PhantomJS and PDFs. One workaround I’ve found effective is using a PDF to HTML conversion service first. This approach allows you to load the HTML version into PhantomJS, which is much more reliable for capturing screenshots and adding overlays.

For the conversion, you could use a third-party API or set up a server-side conversion tool. Once you have the HTML, you can proceed with your original plan using PhantomJS and jQuery.

Regarding screenshots, the page.render() function in PhantomJS works well for capturing specific areas or full pages. Just ensure you set appropriate viewport sizes before rendering.

Remember, PhantomJS is no longer actively maintained. For long-term projects, consider alternatives like Puppeteer or Selenium WebDriver for more robust headless browser automation.

4

hey there mikechen! phantomjs can be tricky with pdfs. have u tried using a pdf.js library alongside phantomjs? it might help render the pdf properly. for screenshots, u could use page.render() function. as for jquery overlay, you’d prob need to convert pdf to html first. good luck with ur project!