Media Type Sniffing

Document Type Replaced Internet-Draft (individual)
Authors Adam Barth  , Ian Hickson 
Last updated 2011-09-26 (latest revision 2011-01-24)
Replaced by draft-ietf-websec-mime-sniff
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream Stream state (No stream defined)
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RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-websec-mime-sniff
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Many web servers supply incorrect Content-Type header fields with their HTTP responses. In order to be compatible with these servers, user agents consider the content of HTTP responses as well as the Content-Type header fields when determining the effective media type of the response. This document describes an algorithm for determining the effective media type of HTTP responses that balances security and compatibility considerations. Please send feedback on this draft to


Adam Barth (
Ian Hickson (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)