[squid-users] cache problem of image/gif

i'm using squid3.0 and meet some problem.

request one:
http://192.168.8.20/gmap/near?near=39.900711,116.392&spn=1,1&q=%D2%F4%C0%D6
 above request return type TEXT/PLAIN cache ok
request two:
http://192.168.8.20/gmap/staticmap?center=30.279752,120.142699&zoom=12&size=240x320&format=gif&maptype=roadmap
above request return IMAGE/GIF，can't cache

access.log :
--------------------------------------------------------------------------------------------------------------
1252545652.809 0 192.168.8.38 TCP_HIT/200 2966 GET http://192.168.8.20/gmap/near? - NONE/- text/plain
1252545670.510 353 192.168.8.38 TCP_MISS/200 36526 GET http://192.168.8.20/gmap/staticmap? - FIRST_UP_PARENT/www image/gif
1252545693.538 0 192.168.8.38 TCP_HIT/200 2966 GET http://192.168.8.20/gmap/near? - NONE/- text/plain
1252545693.892 356 192.168.8.38 TCP_MISS/200 36526 GET http://192.168.8.20/gmap/staticmap? - FIRST_UP_PARENT/www image/gif
---------------------------------------------------------------------------------------------------------------

i reference some docs and add two lines to mime.conf, but it's of no use
mime.conf
#-----------------------------------------------------------------------------------
\.gif$ image/gif anthony-image.gif - image +download
staticmap image/gif anthony-image.gif - image +download
roadmap image/gif anthony-image.gif - image +download
-------------------------------------------------------------------------------------

i can't resolve it !! so anyone pls give me some suggestions, thanks a lot!
          
2009-09-10
 jboot
Received on Thu Sep 10 2009 - 03:38:42 MDT