1208896 - Internationalized Domain Name link broken on click, works on Enter

Status: UNCONFIRMED

(Core :: Networking: DNS, defect, P3)

Description

[Jehan]

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150827075926

Steps to reproduce:

1/ On this page: http://linuxfr.org/users/bortzmeyer/journaux/consultation-republique-numerique-ouverte
Click the link called "site parodique" which is supposed to open http://république-numérique.fr/
2/ I get an error "Firefox can't find the server at r%c3%a9publique-num%c3%a9rique.fr."
This is wrong since the domain exists.
3/ Click on the address bar to get the keyboard focus and click the "Enter" button.



Actual results:

Results: the domain name actually resolves on this second attempt only (clicking Enter).


Expected results:

Expected: it should have already resolved on clicking the link. I did not change anything when I focused the address bar and hit Enter.

Comment 1

[Jehan]

Note also that the first time I went on the link, I believe it tried to open www.république-numérique.fr instead, which I believe corresponds to bug 66183 (adding www. when domain name resolution failed at first), and which failed too (even more since this domain has no www. subdomain). But I can't reproduce it anymore. Now it seems to stick to the domain name without www. and just fails immediately. Not sure if this is relevant.

Comment 2

[Loic]

Yes, it's a dupe. FF adds "www" and fails to resolve the domain.

Comment 3

[Jehan]

Hi,

Sorry to reopen, but no this is not a dupe of bug 66183, which is why I cited it! As I said, even when going to this address without Firefox adding www.
Actually when looking the description of bug 66183, comment 2, you see that the problem is that:

> [Firefox] automatically tries adding a "www." whenever a second-level domain name you type into the location bar doesn't resolve

But république-numérique.fr is an existing domain name and is supposed to resolve! So Firefox should never even have to try the www. variant. I even explained that if I click Enter in the address bar **without changing anything in the address**, it suddenly works.

After more investigation, it seems the bug happens only on percent-encoded variants of the domain name (even though this is apparently valid for the host name to be encoded according to RFC 3986, section 3.2.2).
So clicking on http://république-numérique.fr/ works fine, but clicking on http://r%C3%A9publique-num%C3%A9rique.fr/ (which should be exactly the same thing) does not work.
This is a completely different problem to bug 66183 (it only happens to trigger this other bug, since the name resolution fails).

Comment 4

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258

Comment 5

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258