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From Martin DEVERA <de...@cdi.cz>
Subject protocol/5411: probably missing test in If-Modified-Since code
Date Fri, 03 Dec 1999 11:39:16 GMT

>Number:         5411
>Category:       protocol
>Synopsis:       probably missing test in If-Modified-Since code
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Fri Dec  3 03:40:00 PST 1999
>Last-Modified:
>Originator:     devik@cdi.cz
>Organization:
apache
>Release:        1.3.9
>Environment:
Linux RH 6.1 .. doesn't matter	
>Description:
Suppose you have apache on IP and only one global web (with "It worked..").
Someone looked it via SQUID proxy which cached the / dir. Then we created
virtual web on the same IP. The same person looked again but it have seen
the same old page. When I traced it using sniffit I found that SQUID sends
request with If-Modified-Since header with date 11/8 and length=1945.
New index.html was older but has DIFFERENT LENGTH. It seems the Apache tests
ONLY date and when file-date is older it doesn't check file length too.
It's not too serious bug, but probably it can make some headaches ..	
>How-To-Repeat:
see above
>Fix:
Yep. Test for file length difference before sending 304 response ..
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