more information on overrideCacheControlPrivate

I run squid for 2 days with the patch overrideCacheControlPrivate, in the
previous messages I explained what I have changed in http.c.
I told you that each time I got a HIT the object was released, well I have
found out that my netscape is totaly broken, I've seen that it sends
Pragma: no-cache with a lot of request, I haven't got the time yet to see
why is that and for which requests/Netscape 4.7 for Linux/.So only with my
Netscape the object got released after a HIT,
with Netscape for Windows and IE it did not got released.

I noticed that around 1% of all the requests were images with
Cache-Control: private, but like 99% were with one particular site,
and the rest were from msn.com, microsoft.com and other sites.

So I increased my hit ratio and I was pretty happy about it, though I new
that I haven't done it gracefully, and I was looking for a better
solution.

There was a problem with the server/non-squid related/, but I had to
restart squid, after restarting then a problem occured.

$telnet 0 3128
HTTP/1.0 304 Not Modified
Date: Tue, 12 Jun 2001 22:05:15 GMT
Server: Apache/1.3.19 (Unix) Debian/GNU PHP/4.0.5
ETag: "2132400a-34d-3a27d506"
Expires: Tue, 19 Jun 2001 22:05:15 GMT
Cache-Control: private, max-age=604800
Age: 42013
X-Cache: HIT from proxy.eweb.bg
Proxy-Connection: close

Nothing is returned :(.

I got a hit but the object was not returned, so I had too purge all the
objects that were cached because of my patch.

So as you see 1% of the request is not unsignificant for me, though
probably not many people will need this patch, but I do.

I have come to the conlcusion, that the way to do it is to actually
remove the Cache-Control: private from the server reply header, there are
certainly other ways though.

I haven'f found a way to remove this from the header and that is why again
I write to squid-dev.

I was looking in httpHdrCc.c:
in httpHdrCcParseInit()
I did
case CC_PRIVATE:
debug("Here I have to remove it");
if it is here how to remove it?

I was also trying in HttpHeader.c
in httpHeaderEntryCreate() i changed
debug(55, 9) ("created entry %p: '%s: %s'\n", e, strBuf(e->name),
strBuf(e->value)); */
to debug(55, 1) ...
and in cache.log I was looking for private, but :
the header of the image was Cache-control: private, max-age=.....
and in cache.log the entry was only Cache-Control: max-age=....

Thank you for the help so far, hope you will point me in the right
direction on how to make this patch work and work good.

And just one more thing:

in cache.log I get

2001/06/13 12:53:55| ctx: enter level 0
2001/06/13 12:53:55| override_cache_control_private is matched
2001/06/13 12:54:29| ctx: exit level 0

this is becuse in http.c I added
debug(11, 1) ("override_cache_control_private is matched ....

is the section '11' wrong so I get this ctx: enter level 0.

Thank you.

Krasi Zlatev
032/ 944 138
Network Administration
EWeb
Enjoy!
Received on Wed Jun 13 2001 - 04:52:52 MDT