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Maniphest T123806

Some thumbnails return an application/x-www-form-urlencoded Content-Type (fixed by purging)
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Description

This is a strange one. Some thumbnail URLs, like the one below, return a Content-Type header of "application/x-www-form-urlencoded", even though it returns PNG content.

https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Cholesterol.svg/200px-Cholesterol.svg.png

$ curl -I https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Cholesterol.svg/200px-Cholesterol.svg.png
HTTP/1.1 200 OK
Server: nginx/1.9.4
Date: Fri, 15 Jan 2016 23:26:31 GMT
Content-Type: application/x-www-form-urlencoded

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Event Timeline

JasperStPierre created this task.Jan 15 2016, 11:28 PM
JasperStPierre raised the priority of this task from to Needs Triage.
JasperStPierre updated the task description. (Show Details)
JasperStPierre subscribed.
Restricted Application added subscribers: StudiesWorld, Aklapper. · View Herald TranscriptJan 15 2016, 11:28 PM
Krenair added subscribers: Krenair, • Gilles.Jan 16 2016, 12:17 AM
• MZMcBride added projects: MediaWiki-Uploading, Wikimedia-SVG-rendering.Jan 16 2016, 4:29 AM
• MZMcBride set Security to None.
• MZMcBride subscribed.
Restricted Application added a project: Multimedia. · View Herald TranscriptJan 16 2016, 4:31 AM
Restricted Application added a subscriber: Steinsplitter. · View Herald Transcript
Aklapper added a parent task: T43371: Thumbnail/imagescaler (tracking).Jan 16 2016, 11:59 PM
Matthewarkin subscribed.Jan 19 2016, 12:17 AM

I was able to fix this specific image by visiting https://commons.wikimedia.org/wiki/File:Cholesterol.svg?action=purge so it seems that in some cases a cache is getting corrupted (though we have a few other documented articles where a similar issue was/is happening)

Restricted Application added a subscriber: Matanya. · View Herald TranscriptJan 19 2016, 12:17 AM
Aklapper renamed this task from Some thumbnails return an application/x-www-form-urlencoded Content-Type to Some thumbnails return an application/x-www-form-urlencoded Content-Type (fixed by purging).Mar 8 2016, 9:55 PM
Aklapper triaged this task as Low priority.
MarkTraceur moved this task from Untriaged to Triaged on the Multimedia board.Dec 6 2016, 4:13 PM
Tgr subscribed.Jan 4 2018, 5:29 AM

Probably fixed by the SwiftFileBackend::sanitizeHdrs patch in T178849.

Tgr closed this task as a duplicate of T178849: Click on fullImageLink <a> for PDF on File: page no longer rendering in browser.Jan 4 2018, 5:30 AM
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