Sharing by print gives a blank page with only the text "undefined" on it

[sbrl]

Hey! I've recently set up FreshRSS as an alternative to Miniflux 1 (v2 uses PostgreSQL exclusively, and I don't want a PostgreSQL database server!), and been generally happy with with actually.

I've encountered a bug though in the sharing system. I 'print' things often to a virtual PDF printer I've got setup. If I go to share -> print in FreshRSS, I get the text "undefined" on a white page. I'm including an image and a copy of the resulting PDF at the bottom of this report.

Here's the PDF when I print:
mozilla.pdf

[Alkarex]

Hello @sbrl and welcome :-)
I cannot reproduce the problem.
Tested with Firefox on Ubuntu 18.04, Firefox + Chrome + Edge on Windows.
Do you have any information in your browser console?
Could you please try with another browser?

[sbrl]

Ah, yeah I do get something in the console:

Content Security Policy: Directive ‘child-src’ has been deprecated. Please use directive ‘worker-src’ to control workers, or directive ‘frame-src’ to control frames respectively.
FreshRSS waiting for Sticky-kit… main.js:521:4
FreshRSS init done. main.js:1550:3
Content Security Policy: The page's settings blocked the loading of a resource at inline ("default-src"). i:1:1
This site appears to use a scroll-linked positioning effect. This may not work well with asynchronous panning; see https://developer.mozilla.org/docs/Mozilla/Performance/ScrollLinkedEffects for further details and to join the discussion on related tools and features! i
Content Security Policy: The page's settings blocked the loading of a resource at inline ("default-src").
i:1:1
Content Security Policy: The page's settings blocked the loading of a resource at inline ("default-src").

[sbrl]

Tried Chrome, and can still reproduce - though nothing of interest in the console. I'm using the dark theme, if that helps.

[Alkarex]

Would you mind making a test account for me in your FreshRSS instance? So I can see if it is something due to your instance, or due to your client. If not, I will make you a test instance.

[Alkarex]

I am guessing from your screenshot that you are using Ubuntu, aren't you? Which version?

[Alkarex]

Screenshot using Firefox in Ubuntu 18.04:

[sbrl]

Yep, it's Ubuntu - v18.04 with the latest version of Firefox.

I've created an account for you at my server. Is there a private way I can give you the login details, @Alkarex?

[Alkarex]

@sbrl Please find my e-mail address here.

[sbrl]

Send & encrypted with GPG.

[Alkarex]

@sbrl Well received. Tested from your instance with Firefox 63 (64 bits) on Ubuntu 18.04, as well as Firefox 63 (64 bits) on Windows 10, both without problem. So it seems to be client-related. Could you please try with the exact same account than the one you just sent me?

[sbrl]

Ah, thanks for checking it out! I've checked that out, and the debug account does indeed work as intended. However, if I switch back to my original account, it doesn't work again :-(

Does it make a difference if I imported my feeds via OPML? If need be, I can provide database dumps etc. for debugging purposes.

[Alkarex]

@sbrl I cannot really think of what could be different between the two accounts. Did you observe the problem on some specific feeds, or all feeds?
What database do you use? (not that it makes a difference for this bug, just to know what could be done to export the data)

[Alkarex]

Hum, maybe some settings could be different between your two accounts, one of which could interfere... E.g. shortcuts, extensions, mark-as-read options...

[sbrl]

I've observed it on 2-3 different feeds now, so I think it's safe to say it's practically all feeds, though the they are all imported from Miniflux.

I use an SQLite3 database. Shall I send you a copy of the database for inspection?

[Alkarex]

Yes @sbrl , if not too confidential, please send me your SQLite database, so I can maybe reproduce the problem. Same channel as above.

[sbrl]

@Alkarex Sent. The Firefox Send link expires after 1 download or 24 hours, so if you need me to send it again, just ask :-)

[Alkarex]

@sbrl Received :-) Will test tonight

[Alkarex]

@sbrl Thanks, I can reproduce the problem with the "Show articles unfolded by default" option. Will fix!

FreshRSS/p/scripts/main.js

Lines 1303 to 1322 in 01c4cd8

	function init_print_action() {
	$('.item.share > a[href="#"]').click(function () {
	var content = "<html><head><style>" +
	"body { font-family: Serif; text-align: justify; }" +
	"a { color: #000; text-decoration: none; }" +
	"a:after { content: ' [' attr(href) ']'}" +
	"</style></head><body>" +
	$(".flux.current .content").html() +
	"</body></html>";
	var tmp_window = window.open();
	tmp_window.document.writeln(content);
	tmp_window.document.close();
	tmp_window.focus();
	tmp_window.print();
	tmp_window.close();
	return false;
	});
	}

[sbrl]

Ah, awesome! Glad I've been able to help in tracking down a bug. I await a fix :D

[Alkarex]

Fixed in #2148
Tests welcome!

[sbrl]

Thanks so much :D