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javascript - print a pdf via iframe (cross domain)

I need to print a PDF... But I get an error

Is there a workaround? I just need to print a PDF file with one click

error:

Uncaught SecurityError: Blocked a frame with origin "https://secure.domain.com" from accessing a frame with origin "https://cdn.domain.com". Protocols, domains, and ports must match.

code:

var iframe = $('<iframe src="'+url+'" style="display:none"></iframe>').appendTo($('#main')).load(function(){
    iframe.get(0).contentWindow.print();
});
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The error you are dealing with is related to cross-domain protection and the same-origin policy.

In your case, you can print an cross-domain iframe if you nest this iframe in another local iframe that we can call a proxy iframe.

Since the proxy iframe is local and have the same origin, you can print it without any issue and it'll also print the cross-domain iframe.

See below for an example:

index.html (container)

$(function() {
  var url = 'proxy.html'; // We're not loading the PDF but a proxy which will load the PDF in another iframe.

  var iframe = $('<iframe src="' + url + '"></iframe>').appendTo($('#main'));

  iframe.on('load', function(){
    iframe.get(0).contentWindow.print();
  });
});

proxy.html (proxy)

<body>
  <iframe src="http://ANOTHER_DOMAIN/PDF_NAME.pdf"></iframe>
</body>

With this solution, you no longer have cross-domain issues and you can use the print() function. The only things you need to deal with are a way to pass the PDF url from the container to the proxy and a way to detect when the iframe with the PDF is actually loaded but these depends on the solution / languages you're using.


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