[S.G.]

Our developer went to network settings and added tex to the uploaded file types, but when we tested this in a sub-site media library, by uploading a LaTeX file, we got the same error message (“this file is not permitted due to security reasons”). We believe we are missing a final step–do you know what it is?

Thank you!

[Ryan Seslow]

Hi Syelle! Thanks for posting this, can you attach the LaTeX file here,

Have you posted this file formant in the past with out issues?

Thanks!

Ryan

[S.G.]

Thanks, Ryan! Yes, I’ve tested with this file before, successfully, but years ago. Let us know what you think!

[Ryan Seslow]

OK, by default the WP media library only allows a few file format types (for security purposes) the most common are –

• Images like .png, .gif, .jpg
• Documents such as .doc, .xls, .ppt, .pdf
• Audio like .wav, .mp3, .mp4
• Video like .mpg, .mov, .wmv

Im thinking, in the past you used a plug-in to add the LaTeX file or the plug-in converted it, Im going to take a peek at our plug-in roster and see if there is a compatible option, back soon 🙂

[S.G.]

Our allowed file types are:
<p data-pm-slice=”1 1 []”>jpg jpeg png gif mov avi mpg 3gp 3g2 midi mid pdf doc ppt odt pptx docx pps ppsx xls xlsx key mp3 ogg m4a wav mp4 m4v webm ogv flv svg</p>
<p data-pm-slice=”1 1 []”>I know that CityTech’s OL allows tex files, for example, though I don’t know if they use the plugin you mention…</p>
<p data-pm-slice=”1 1 []”>I just tested a different LaTeX file, and it did not work; the setting we changed as Network Admin still seems to be missing a step.</p>

[Ryan Seslow]

Im digging into this and will be back in touch soon with info – in the meantime, did you already clear the web browser cache on your browser and also reboot the machine? The WordPress media library will reject uploads from cached pages. Its always worth a try. 🙂

[Ray]

Hi Syelle and Ryan,

Besides adding the latex and ltx file extensions to the uploaded file types, you also need to register the mime type for the file type with WordPress.

You can do this with the following snippet in /wp-content/mu-plugins/:

/**
 * Add custom items to mime type array for uploads
 */
function my_mime_types( $types ) {
	$types['latex']  = 'application/x-latex';
	$types['ltx']    = 'application/x-latex';

	return $types;
}
add_filter( 'upload_mimes', 'my_mime_types' );

To find out how to add a mu-plugin, read this article:
https://pantheon.io/docs/mu-plugin

Hope that helps!

[Ryan Seslow]

Thanks so much Ray! This is super helpful, as I was wondering how much ability one has to make those inputs themselves here versus reaching out to the DEV team to do it, or discovering an existing plug-in that converts things. Thank you!

[Ray]

Hi Ryan,

You could give this plugin a shot:
https://wordpress.org/plugins/wp-add-mime-types/

I haven’t tested it though, but looks like it should work.

[S.G.]

Thank you, Ray! I’ll let you know how it goes when Chris has a chance to implement your instructions.

Just one question: You wrote “Besides adding the latex and ltx file extensions…”

The LaTeX files I have are .tex file extension. Are we supposed to add tex and ltx?

Thanks!

[Ryan Seslow]

Thanks Ray! Will ask Chris and Boone about this plug in as it could be a good option as well! Thanks!

[S.G.]

Hi Ray,

We tried the mu- plugin but it did not work! The file types showed in list of allowed mime types, but we could not upload LaTeX files.
We then installed your recommended plugin (wp-add-mime-types) and that did work!

[Ryan Seslow]

Happy to read this!

[Author]

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