Instead of hot-linking to external images from my application I'd like to cache them on my server where my web app resides, e.g. instead of
<img src="http://api.domain.com/image/1234.jpeg" />
I'd like to call a cache, e.g.
<img src="http://dev:3128/myapp/image?href=http://api.domain.com/image/1234.jpeg">
So of Squid has the image it'll pass it through, otherwise it'll retrieve and then cache it for next time. Is this possible?
I've installed squid, configured it as a reverse proxy in front of Apache. My config is below (hostname is dev):
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
acl dev_users dstdomain dev
http_access allow dev_users
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
acl JPEG url_regex -i \.myapp/image?href=http://api.domain.com/image/*.jpeg$
#acl ALL dst 0.0.0.0/0.0.0.0
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access deny all
http_port 3128 accel defaultsite=dev vhost
cache_peer 127.0.0.1 parent 80 0 no-query originserver name=dev
cache_peer_access dev allow dev_users
cache_peer_access dev deny all
cache_dir ufs /var/spool/squid3 100 16 256
coredump_dir /var/spool/squid3
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880
refresh_pattern . 0 20% 4320
never_direct allow JPEG
#always_direct allow ALL
At this point the squid proxy seems to work at http://dev:3128/myapp as it serves my php app fine. But I have to comment out the ALL acl lines (otherwise I get no response) and requests for <img src="http://dev:3128/myapp/image?href=http://api.domain.com/image/1234.jpeg"> are still showing in the apache access log (whereas I'm looking for squid to cache/serve them).
http://dev:3128/myapp/image is actually a PHP script that retrieves and serves the image via fopen and fpassthru.
Best Answer
I would try the following config. I cleaned up yours (removed stuff not referenced) and forced it to cache anything for a year and not cache failures.
Note, squid configs are very version specific, so what version are you running?