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Squid 3.1 + Accel conf + ETag = ignoring ETag

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Hi,

I'm experimenting with squid and a service I'm writing.

my service compute ETag and return it along with other Http headers:

Headers returned by a request to my service:

HTTP/1.1 200 OK
Content-Language: it
Cache-Control: public, max-age=60, s-maxage=60
ETag: "32b71ecde17592a1d6ef696f5ae78216"
Last-Modified: Fri, 27 Apr 2012 14:09:08 GMT
Date: Fri, 27 Apr 2012 17:43:52 GMT
Vary: Accept, Accept-Language
Age: 0
Content-Type: application/json;charset=UTF-8
Content-Length: 932
Server: Jetty(6.1.21)


here's what's happen if I pass
If-Modified-Since: Fri, 27 Apr 2012 14:09:08 GMT

HTTP/1.1 304 Not Modified
Content-Language: it
Cache-Control: public, max-age=60, s-maxage=60
ETag: "32b71ecde17592a1d6ef696f5ae78216"
Last-Modified: Fri, 27 Apr 2012 14:09:08 GMT
Date: Fri, 27 Apr 2012 17:44:49 GMT
Vary: Accept, Accept-Language
Age: 0
Content-Type: application/json;charset=UTF-8
Content-Length: 932
Server: Jetty(6.1.21)



And if pass:
If-None-Match: "32b71ecde17592a1d6ef696f5ae78216"

HTTP/1.1 304 Not Modified
Content-Language: it
Cache-Control: public, max-age=60, s-maxage=60
ETag: "32b71ecde17592a1d6ef696f5ae78216"
Last-Modified: Fri, 27 Apr 2012 14:09:08 GMT
Date: Fri, 27 Apr 2012 17:46:20 GMT
Vary: Accept, Accept-Language
Age: 0
Content-Type: application/json;charset=UTF-8
Content-Length: 932
Server: Jetty(6.1.21)



Nothing special...
But squid is not sending me the "If-None-Match" header

I have situation where the Last-Modified date doesn't change, the ETag work in identifying what's a 304 and what's not. The last modified date check fails there (give 304 when the content has been actually modified).


So I need squid to give me If-None-Match

is there some config to enable?
Am I doing something wrong?

thanks,
Daniele


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