如何在Laravel Validator中添加MIME类型

Question

I can not figure out how to add a mime type before validation. I need to upload CSV files however they have the mime type text/x-comma-separated-values so how can I add that mime type to the MimeTypeExtensionGuesser array? I would like to keep things simple in my Controller method and just have:

$validator = Validator::make(Input::all(), [
'file' => 'required|mimes:csv'
]);

but first I need to add the new mime type.

Answer 1

I've got a little bit different approach: just get file extension from file name and use in rule. Here is my full answer to similar question - https://stackoverflow.com/a/26299430/1331510

Answer 2

$mime = Input::file('file')->getMimeType();//returns text/plain

    //check if file is csv

    if($mime != 'text/plain'){

        $error = array();
        $error[] = "File type must be csv";
        $validator = $error;
        return Redirect::to('your-page')->withErrors($validator);
    }