About the specification of squid cache - Red Hat Customer Portal

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Issue

The object is not cached by squid when a user browses a certain URL.
There is the following setting by default in squid.conf.

   refresh_pattern -i (/cgi-bin/|\?) 0  0%  0

We expect that this object is cached by removing the above setting. However, it was not cached.
When we confirmed tcpdump, web server responded to squid "302 Moved Temporarily" not including Expires header.
Is the reason that this object is not cached when the above-mentioned refresh_pattern is not set the 302 response not including Expires header?
Does this specification, which 302 response not including Expires header is not cached, have priority over the processing of above-mentioned refresh_pattern?

Environment

Red Hat Enterprise Linux 6 Update 4
Package Version: squid-3.1.10-18.el6_4.x86_64

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