mimeData | Object MIME object for which you want to retrieve the Content-Type message header. |
contentType | String A String containing the value of the MIME object's Content-Type header field. Note that this service returns only the media type and subtype portion of this header field's value. It does not return any parameters the value might include. For example, if the message's Content-Type header was: content-type: text/plain;charset=UTF8 contentType would contain text/plain. |