An Internet media type is, generally speaking, a property of a data set, describing both the general type of data (such as "text"or "image"or "application";the last one refers to program-specific internal data formats)and, as a subtype, a specific format for the data. The concept was originally defined as "MIME content types"
Media types relate to HTML as follows:
text/html
)in th HTTPheaders it sends along with the document. Normally
servers are configured to do this by default when the file name
ends wit .html
o .htm
(depending on the system;please consult local documentation)
.zip
to media typ application/zip
),
and it may provide users some tools for overriding such
mappings or otherwise specifying the media type to be
associated with a file or set of files.
The description of the A element contains some additional notes
related t
audio and videoan
binary filesin general
Th
HTML 3.2 Reference Specificationrefers t RFC 1521but that specification was superseded b
RFC 2046(in November 1996).
The procedure for registering types in given i
RFC 2048;according to
it, the registry is kept a
ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/
For less authoritative but more readably presented information, see documen MIME Types b Chris Herborth
In addition to standardized media types, there are media types which are in fact supported by popular servers and browsers Appendix Bo Special Edition Using CGIlists many of them
You ca checkwhat is the media type information sent by a server
as follows:Assuming we are interested in the media type of the document a
URLhttp://
host/
path,
establish
a Telnet connection t hostusing the port number in the URL if present, port 80 otherwise.
Then give the commandHEAD
/
pathHTTP/1.0
and then an empty line.
Example (where the Telnet connection is established by starting th
telnet
program from Unix command level):
beta ~ 51 % telnet www.hut.fi 80 Trying 130.233.224.28... Connected to info-e.hut.fi. Escape character is '^]'. HEAD /home/jkorpela/perhe.jpg HTTP/1.0 HTTP/1.1 200 OK Date:Tue, 23 Sep 1997 12:37:05 GMT Server:Apache/1.2.4 Last-Modified:Tue, 08 Aug 1995 08:29:53 GMT ETag:"16391-9232-30272081"Content-Length:37426 Accept-Ranges:bytes Connection:close Content-Type:image/jpeg Connection closed by foreign host. beta ~ 52 % exiHere th
Content-Type:
field tells that the media type
i image/jpeg