Unable to upload ttml file from wp-admin

[casiepa]

When trying to upload a .ttml file from the Media Library, the error 'Sorry, this file type is not permitted for security reasons.' is displayed although the ttml file is valid.

[dd32]

Is there any real need to use the wp-admin uploader? What's the specific use-case?

Supporting it may require duplicated handling due to the front-end uploader using a different code path.

We can support it if needed, but it's just easier for everyone if it's only done from one place

[casiepa]

Is there any real need to use the wp-admin uploader?

No. But a ttml file failed to upload in the frontend, so I tried in wp-admin. First message was that the file was not a valid ttml file (that was a better error message then the frontend). When that was fixed I got the error that I could not upload in the wp-admin although at the top it said ttml files were accepted.

We can support it if needed

Nah, we can close this one. (But I do need to do some more tests as it seems – is not supported in a ttml file)
thanks @dd32

[dd32]

But a ttml file failed to upload in the frontend, so I tried in wp-admin. First message was that the file was not a valid ttml file (that was a better error message then the frontend).

Ahah, so the validation rejected it and failed to provide an error message. That's a fair thing to fix for the uploader, but probably isn't hit normally since it should be rare for an application to generate an invalid file.