The Content-Type entity-header field indicates the media type of the Entity-Body sent to the recipient or, in the case of the HEAD method, the media type that would have been sent had the request been a GET.
Content-Type = "Content-Type" ":" media-type
Media types are defined in Section 3.6. An example of the field is
Further discussion of methods for identifying the media type of an entity is provided in Section 7.2.1.