[Webkit-unassigned] [Bug 235066] New: Printing PDF from iframe result in blank page

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jan 11 07:42:34 PST 2022


            Bug ID: 235066
           Summary: Printing PDF from iframe result in blank page
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Apple Silicon)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Frames
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cyril at tutteo.com

Created attachment 448847

  --> https://bugs.webkit.org/attachment.cgi?id=448847&action=review

Simple proof of concept to highlight the issue.

Programmatically printing a PDF from an iframe result in a blank page. 

You can find an archive attached to this message, on which you can run a web server to reproduce the issue. 

If a `setTimeout` is set (1000ms in the attached example) before the call to `print()`, the 
first attempt works (see `working-print.png` in the attached archive)

However if we click on "cancel", successive attempts result in a blank page, after asking "This web page is trying to print. Do you want to print this web page?". 
(See `failed-print.png` in the attached archive). 

So far I have only reproduced the bug on Safari. I have tested it on last versions of Firefox (95) and Chrome (97) without the bug happening. 

It seems that the bug has been introduced in a recent version of Safari, as it used to work before.

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