Deny mime type before uploading?

[paulcanning]

Currently, to disallow a mime type, the file has to be upload to the server first then it comes back saying the file type is not allowed.

This is useless for huge files, as I need to be able to have elFinder inform the user that the mime type is not allowed after then select a file, before it gets uploaded.

I cannot use the client option onlyMimes as the list is huge and allowed types may change quickly and frequently. I only need to stop certain ones e.g .exe

Is this possible?

[paulcanning]

Also, to add to this (unless there is a solution already) can we check file extensions, rather then mime types? I want to allow users to add their own extensions to a deny list in a backend system, but they might not know the exact mime type for a particular file extension.

[nao-pon]

We plan to use the MIME type of the type property of the browser of file objects. It does not check when the MIME type can not be acquired.

[paulcanning]

Is there anyway to use the client option onlyMime to deny file types right now?

For example, I want to hide files with extension exe in the file dialog window, but onlyMimes is a list of allowed file types as it stands.

[nao-pon]

onlyMime is allowed filter only. By the way what about volume option accessControl?

e.g. in accessControl call back function

if ($attr === 'hidden') {
    if (preg_match('/\.exe$/i', $path)) {
        return true;
    }
}

[paulcanning]

How will the new check work? Is it a client option? And when will it be ready to roll out? :)