Cisco 4700M Configuration Manual page 174

Configuring a Layer 7 HTTP Deep Inspection Policy
Table 3-6
Field Name
Host
If-Match
Pragma
Referer
Transfer-Encoding
Cisco 4700 Series Application Control Engine Appliance Security Configuration Guide
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HTTP/1.1 Header Fields (continued)
Description
Internet host and port number of the resource being
requested, as obtained from the original URI given
by the user or referring resource. The Host field
value must represent the naming authority of the
origin server or gateway given by the original URL.
Used with a method to make it conditional. A client
that has one or more entities previously obtained
from the resource can verify that one of those entities
is current by including a list of their associated entity
tags in the If-Match header field. This feature allows
efficient updates of cached information with a
minimum amount of transaction overhead. It is also
used, on updating requests, to prevent inadvertent
modification of the wrong version of a resource. As
a special case, the value "*" matches any current
entity of the resource.
Pragma directives understood by servers to whom
the directives are relevant. The syntax is the same as
for other multiple-value fields in HTTP. For
example, the accept field is a comma-separated list
of entries for which the optional parameters are
separated by semicolons.
Address (URI) of the resource from which the URI
in the request was obtained.
What (if any) type of transformation has been
applied to the message body in order to safely
transfer it between the sender and the recipient.
Chapter 3 Configuring Application Protocol Inspection
OL-16202-01