Laravel evaluates JPEG as of mime-type application/octet-stream but php and ubuntu correctly state image/jpeg

Question

In a Laravel 7 application I am uploading images. In my last batch I uploaded roughly 600 jpegs and 80 of these jpegs failed to be uploaded becaus of a Laravel validation error. The other jpegs were uploaded successful.

I checked all these 80 jpegs manually via Ubuntu command line tool file and also via php-interactive-mode finfo. Both tell that the mime-type is image/jpeg.

But my code in Laravel

    $this->validate($request, [
        'file'  => 'required',
        'file'  => 'file',
        'file'  => 'mime-types:image/jpeg'
    ]);

returns message: "The given data was invalid.", errors: {file: ["validation.mime_types"]}} beause the mime-type was evaluated to be application/octet-stream from Laravel.

I then thought okay, Laravel might do some special coding. Therefore I checked the source-code of Laravel at FileinfoMimeTypeGuesser.php and at FileBinaryMimeTypeGuesser.php. But Laravel obviously only either uses file -b --mime -- %s or new finfo(FILEINFO_MIME_TYPE, $this->magicFile); so nothing special at all.

And both code-options result in (as written before) image/jpeg when I use file on the Ubuntu command line or finfo in an interactive-mode php session for any of the above mentioned 80 jpegs which Laravel rejected.

Can anyone help me on this? How is Laravel determining the mime-type? Maybe there is a magic database in Laravel which I need to update?

Thanks in advance.

question from:https://stackoverflow.com/questions/65868417/laravel-evaluates-jpeg-as-of-mime-type-application-octet-stream-but-php-and-ubun

Answer 1

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