Returns the file mime type.
The client mime type is extracted from the request from which the file
was uploaded, so it should not be considered as a safe value.
Returns the original file extension.
It is extracted from the original file name that was uploaded.
This should not be considered as a safe value to use for a file name on your servers.
Returns the original file name.
It is extracted from the request from which the file has been uploaded.
This should not be considered as a safe value to use for a file name on your servers.