From: Bartosz Dziewoński <matma.rex@gmail.com>
Date: Fri, 7 Mar 2014 17:39:51 +0000 (+0100)
Subject: Check validity and availability of usernames during signup via AJAX
X-Git-Tag: 1.31.0-rc.0~16657^2
X-Git-Url: https://git.heureux-cyclage.org/?a=commitdiff_plain;h=74b222230da8a3dadc4d03e1a3e000c1ca09e12a;hp=74b222230da8a3dadc4d03e1a3e000c1ca09e12a;p=lhc%2Fweb%2Fwiklou.git

Check validity and availability of usernames during signup via AJAX

This is done in addition to the server-side checks. Users who have
disabled JavaScript will not notice any difference.

The way this is done (via action=query&list=users API) means that we
can't check for all possible error conditions, both for the username
(e.g. these enforced by extensions like AntiSpoof) and other parts of
the form (e-mail, password…) – these are still handled server-side
only. Thus we intentionally never say that whatever the user typed in
is valid – we only warn when we know it's not.

Doing this "properly" would require some reworking of the internals of
the signup process and this way is already a huge improvement.

(Split off from the reverted a0c72523.)

Bug: 34447
Change-Id: I42c00b54651fd4e7217a862b3116c6113935f5ae
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