⚓ T417797 [MEX] Display errors using HTML format

⚓ T417797 [MEX] Display errors using HTML format
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T417797
[MEX] Display errors using HTML format
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Assigned To
mahmoud.abdelsattar.wmde
Authored By
Lucas_Werkmeister_WMDE
Feb 18 2026, 3:54 PM
2026-02-18 15:54:02 (UTC+0)
Tags
Wikidata
(incoming)
MW-1.46-notes (1.46.0-wmf.26; 2026-04-28)
Wikidata-Omega (Completed Tasks)
(Newly completed tasks)
Referenced Files
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Subscribers
Aklapper
Arian_Bozorg
Lucas_Werkmeister_WMDE
mahmoud.abdelsattar.wmde
Sadiya.Mohammed_WMDE
Description
In
Mathematical expression: Simple text input
(for
T405730
), we changed the API
errorformat
parameter from
html
to
plaintext
. However, in the long term we should return to the HTML error format, as it can be more informative (e.g. hyperlinks might have been stripped from the plain text; AbuseFilter errors might have contained an error box).
Acceptance criteria:
All wbui2025 API requests use
errorformat=html
HTML errors are displayed correctly (no double-escaping but also no XSS vulnerability)
Details
Related Changes in Gerrit:
Subject
Repo
Branch
Lines +/-
Display errors using HTML format
mediawiki/extensions/Wikibase
master
+35
-13
Customize query in gerrit
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Status
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Assigned
Task
Open
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T394621
[MEX] Mobile Editing Experience of Items Project
Resolved
mahmoud.abdelsattar.wmde
T417797
[MEX] Display errors using HTML format
Mentioned Here
T304945: Remove custom error responses (localization, several errors) from Wikibase APIs
T405730: [MEX] M4.1.5 - Mathematical expression: Simple text input (string) with value specific output
Event Timeline
Lucas_Werkmeister_WMDE
created this task.
Feb 18 2026, 3:54 PM
2026-02-18 15:54:02 (UTC+0)
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Feb 18 2026, 3:54 PM
2026-02-18 15:54:04 (UTC+0)
karapayneWMDE
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Feb 23 2026, 7:28 PM
2026-02-23 19:28:41 (UTC+0)
mahmoud.abdelsattar.wmde
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Feb 24 2026, 12:55 PM
2026-02-24 12:55:15 (UTC+0)
Sadiya.Mohammed_WMDE
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Mar 4 2026, 9:02 AM
2026-03-04 09:02:46 (UTC+0)
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Mar 4 2026, 12:07 PM
2026-03-04 12:07:41 (UTC+0)
Comment Actions
Change #1247982 had a related patch set uploaded (by Sadiya.mohammed13; author: Sadiya.mohammed13):
[mediawiki/extensions/Wikibase@master] Display errors using HTML format
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Mar 4 2026, 12:07 PM
2026-03-04 12:07:42 (UTC+0)
Sadiya.Mohammed_WMDE
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Mar 4 2026, 3:39 PM
2026-03-04 15:39:29 (UTC+0)
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Mar 10 2026, 2:33 PM
2026-03-10 14:33:00 (UTC+0)
mahmoud.abdelsattar.wmde
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Mar 12 2026, 9:18 AM
2026-03-12 09:18:33 (UTC+0)
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Comment Actions
I added some comments o the patch.
Thank you!
Sadiya.Mohammed_WMDE
reassigned this task from
Sadiya.Mohammed_WMDE
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mahmoud.abdelsattar.wmde
Mar 12 2026, 3:21 PM
2026-03-12 15:21:33 (UTC+0)
Sadiya.Mohammed_WMDE
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mahmoud.abdelsattar.wmde
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Mar 16 2026, 1:25 PM
2026-03-16 13:25:36 (UTC+0)
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mahmoud.abdelsattar.wmde
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Thu, Apr 2, 9:29 AM
2026-04-02 09:29:33 (UTC+0)
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Comment Actions
@Sadiya.Mohammed_WMDE
Could you please check the comments in the patch?
Thank you!
Sadiya.Mohammed_WMDE
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Thu, Apr 2, 1:38 PM
2026-04-02 13:38:14 (UTC+0)
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Lucas_Werkmeister_WMDE
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Tue, Apr 7, 10:20 AM
2026-04-07 10:20:21 (UTC+0)
Lucas_Werkmeister_WMDE
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Lucas_Werkmeister_WMDE
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Wed, Apr 8, 12:51 PM
2026-04-08 12:51:12 (UTC+0)
Comment Actions
I mentioned this on Gerrit but it seems worth pointing out here too: our effort to display useful errors in HTML is somewhat hampered by the weird structure of errors in Wikibase API responses – see
T304945
. Maybe now is a good time to tackle that task.
gerritbot
added a comment.
Thu, Apr 16, 3:51 PM
2026-04-16 15:51:12 (UTC+0)
Comment Actions
Change #1247982
merged
by jenkins-bot:
[mediawiki/extensions/Wikibase@master] Display errors using HTML format
Lucas_Werkmeister_WMDE
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Thu, Apr 16, 3:52 PM
2026-04-16 15:52:57 (UTC+0)
Lucas_Werkmeister_WMDE
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Comment Actions
Not sure if this goes into Tech or Product Verification… let’s try Product.
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MW-1.46-notes (1.46.0-wmf.26; 2026-04-28)
Thu, Apr 16, 4:00 PM
2026-04-16 16:00:51 (UTC+0)
Maintenance_bot
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Patch-For-Review
Thu, Apr 16, 4:32 PM
2026-04-16 16:32:04 (UTC+0)
Arian_Bozorg
subscribed.
Mon, Apr 20, 1:12 PM
2026-04-20 13:12:43 (UTC+0)
Comment Actions
Is there an example I can check this one on?
Arian_Bozorg
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Mon, Apr 20, 1:13 PM
2026-04-20 13:13:21 (UTC+0)
mahmoud.abdelsattar.wmde
added a comment.
Mon, Apr 20, 1:25 PM
2026-04-20 13:25:36 (UTC+0)
Comment Actions
@Arian_Bozorg
Sure.
Open any item page.
Create/edit any math expression statement. Type in the value any invalid character like "\".
Or, in URL statement type, use a invalid protocol like "hpsfs://".
(before saving open the browser inspector on the network tab and check for the requests "api.php?..." and check the:
Save.
Check for:
"Payload" tab for "errorformat=html".
"Preview/Response" tab and check the "html" node in the response tree.
mahmoud.abdelsattar.wmde
added a comment.
Wed, Apr 22, 8:45 AM
2026-04-22 08:45:40 (UTC+0)
Comment Actions
TV: No issues found and the acceptance criteria are met.
Thank you!
mahmoud.abdelsattar.wmde
closed this task as
Resolved
Wed, Apr 22, 8:45 AM
2026-04-22 08:45:47 (UTC+0)
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