If we were to adopt the rule (however qualified) that a broader set of header fields are valid in the trailer, there would still be a set that really need to be in the header. I'll throw out a list based on wanting certain kinds of information before receiving the body: - fields that govern operation of the recipient directly such as Upgrade, Expect, or Host - fields that determine whether or not the body is needed at all, such as Authorization, Range, and the If-* headers - fields that are needed to render or interpret the body, such as Content-* Header fields which MUST NOT be sent in the trailer: Transfer-Encoding Upgrade Authorization Expect Host If-Modified-Since If-Match If-None-Match If-Range If-Unmodified-Since Max-Forwards Proxy-Authorization Range Content-Base Content-Encoding Content-Language Content-Length Content-Location Content-Range Content-Type -- Scott Lawrence EmWeb Embedded Server <lawrence@agranat.com> Agranat Systems, Inc. Engineering http://www.agranat.com/Received on Monday, 15 September 1997 15:10:12 UTC
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