According to the linked discussions, error messages are file name is not allowed, this type of file is banned, badupload_file, The stashed file was not found when attempting to upload it from the stash (this one probably unrelated, but who knows).

If someone could share an affected file without uploading it to Commons, that would be helpful.

In T87062#982992, @Tgr wrote:

According to the linked discussions, error messages are file name is not allowed, this type of file is banned, badupload_file, The stashed file was not found when attempting to upload it from the stash (this one probably unrelated, but who knows).

this type of file is banned is filetype-banned (or api-error-filetype-banned).
The stashed file was not found when attempting to upload it from the stash is api-error-stashedfilenotfound.

I can't find file name is not allowed` but [api-error-]illegal-filename is close enough (The filename is not allowed.).

Sorry, I translated the message without retry. The exact message is in German Der Dateiname ist nicht erlaubt. In English The filename is not allowed.

There you have a file not uploaded and failing with the same message. Name on local disk is 20150103_15-32-20_01.3.jpg.

I know that the name is not legal for the final naming, but until yesterday it was possible to rename after the upload to stash. But I tried a similar file renamed to Ernst Uray.jpg and it did not work either.

This is the relevant part of the web console:

[23:20:26.883] GET https://bits.wikimedia.org/event.gif?%7B%22event%22%3A%7B%22quantity%22%3A1%2C%22event%22%3A%22uploads-added%22%2C%22flowId%22%3A1421446817511787%7D%2C%22clientValidated%22%3Atrue%2C%22revision%22%3A9651951%2C%22schema%22%3A%22UploadWizardUploadFlowEvent%22%2C%22webHost%22%3A%22commons.wikimedia.org%22%2C%22wiki%22%3A%22commonswiki%22%7D; [HTTP/1.1 204 No Content 50ms]
[23:20:26.885] POST https://commons.wikimedia.org/w/api.php [HTTP/1.1 200 OK 2049ms]
[23:20:29.989] GET https://bits.wikimedia.org/event.gif?%7B%22event%22%3A%7B%22step%22%3A%22file%22%2C%22code%22%3A%22illegal-filename%22%2C%22message%22%3A%22The%20filename%20is%20not%20allowed%22%2C%22flowId%22%3A1421446817511787%7D%2C%22clientValidated%22%3Atrue%2C%22revision%22%3A9924376%2C%22schema%22%3A%22UploadWizardErrorFlowEvent%22%2C%22webHost%22%3A%22commons.wikimedia.org%22%2C%22wiki%22%3A%22commonswiki%22%7D; [HTTP/1.1 204 No Content 38ms]

Thanks for the details!

Is this really a bug? Uploads failing due to title blacklist issues after one has went through the effort to fill out the description is a weird thing and seems to be responsible for a significant amount of aborted uploads (T77827; see stats here). Is there any disadvantage of these errors happening sooner? Are they happening in a more disturbing / less informative way?

Eh, stupid question. I still had the old upload form in mind. In UW you can't rename the file until the description step...

Content-Disposition: form-data; name="filename"
-----------------------------202708882616013225741163437014

As Lupo pointed out on-wiki, the filename is missing.

It only happens in FF, in Safari the upload via UW succeeds. So it is unlikely the internet provider.

The upload with FF and Upload Wizard works for me on one computer, does not work on another. Different providers.

I now tried Computer A (which produces upload error messages with two different Internet providers) with the third Internet provider, and upload with the Wizard failed as well with the exact same message "badupload_image". Wizard upload using Computer B with this third Internet provider works without any error messages. I can't test Computer B with the first two Internet providers because I can't really move it. I'm using the latest Firefox (with Adblock enabled, but disabling it doesn't change anything) on both computers.

FYI, I have removed a comment in this task that contained personal data and afterwards removed the custom access policy again.

Change 187317 had a related patch set uploaded (by Gilles):
Fix formdata filename field

https://gerrit.wikimedia.org/r/187317

Patch-For-Review

Change 187317 merged by jenkins-bot:
Fix formdata filename field

https://gerrit.wikimedia.org/r/187317

I still get „badupload_file“.

@Rosenzweig locally? This hasn't been deployed to production yet. The fix is verifiable on commons beta, though.

Change 187697 had a related patch set uploaded (by Gilles):
Fix formdata filename field

https://gerrit.wikimedia.org/r/187697

Patch-For-Review

Change 187698 had a related patch set uploaded (by Gilles):
Fix formdata filename field

https://gerrit.wikimedia.org/r/187698

Patch-For-Review

Change 187699 had a related patch set uploaded (by Gilles):
Bring UploadWizard submodule up to date

https://gerrit.wikimedia.org/r/187699

Patch-For-Review

Change 187697 merged by jenkins-bot:
Fix formdata filename field

https://gerrit.wikimedia.org/r/187697

Change 187698 merged by jenkins-bot:
Fix formdata filename field

https://gerrit.wikimedia.org/r/187698

Change 187700 had a related patch set uploaded (by Gilles):
Bring UploadWizard submodule up to date

https://gerrit.wikimedia.org/r/187700

Patch-For-Review

Change 187699 merged by MarkTraceur:
Bring UploadWizard submodule up to date

https://gerrit.wikimedia.org/r/187699

Change 187700 merged by MarkTraceur:
Bring UploadWizard submodule up to date

https://gerrit.wikimedia.org/r/187700

Upload through UW worked for me this morning on FF, but now (after 14 UTC) no upload happens again. The behavior is different: I get the ''share from Flickr'' button. Upload through UW does not with Safari either, same behavior.

To clarify:
After selecting a file, I see the usual box for a single file with the original name and the remove button, but no spinning 'I'm uploading' icon to the right. And that's what is happening: no upload.

Below I have two buttons named (with &uselang=en)

• Add more files
• Share images from Flickr

No idea whether this is the same problem or something different. There was a similar problem with the Flickr-button, I remember.

I get the ''share from Flickr'' button.

Can you clarify what you mean by that?

Do you think it is still the same bug, or something unrelated?

Do you think it is still the same bug, or something unrelated?

Could be unrelated, but I don't know. Do you need more diagnostic data?

See also T88576