See Thread at: http://www.techienuggets.com/Detail?tx=32811 Posted on behalf of a User We have about 600 users behind a squid 2.6stable20 proxy, and youtube represents a big chunk of our bandwidth. Will this method work in 2.6 or is 2.7 needed? We tried to used 3.0 for a while, but suffered a proxy auth bug, and when that was fixed, it was unstable, so I went back to 2.6 Thanks. In Response To: On Thu, Apr 17, 2008 at 08:11:51AM +0800, Adrian Chadd wrote: > The problem with caching Youtube (and other CDN content) is that > the same content is found at lots of different URLs/hosts. This > unfortunately means you'll end up caching multiple copies of the > same content and (almost!) never see hits. > > Squid-2.7 -should- be quite stable. I'd suggest just running it from > source. Hopefully Henrik will find some spare time to roll 2.6.STABLE19 > and 2.7.STABLE1 soon so 2.7 will appear in distributions. Thanks Adrian. FYI I got this to work with 2.7 (latest) based off the instructions you provided earlier. Here is my final config and the perl script used to generate the storage URL: http_port 3128 append_domain .esri.com acl apache rep_header Server ^Apache broken_vary_encoding allow apache maximum_object_size 4194240 KB maximum_object_size_in_memory 1024 KB access_log /usr/local/squid/var/logs/access.log squid # Some refresh patterns including YouTube -- although YouTube probably needs to # be adjusted. refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i \.flv$ 10080 90% 999999 ignore-no-cache override-expire ignore-private refresh_pattern ^http://sjl-v[0-9]+\.sjl\.youtube\.com 10080 90% 999999 ignore-no-cache override-expire ignore-private refresh_pattern get_video\?video_id 10080 90% 999999 ignore-no-cache override-expire ignore-private refresh_pattern youtube\.com/get_video\? 10080 90% 999999 ignore-no-cache override-expire ignore-private refresh_pattern . 0 20% 4320 acl all src 0.0.0.0/0.0.0.0 acl esri src 10.0.0.0/255.0.0.0 acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl to_localhost dst 127.0.0.0/8 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 # Some Youtube ACL's acl youtube dstdomain .youtube.com .googlevideo.com .video.google.com .video.google.com.au acl youtubeip dst 74.125.15.0/24 acl youtubeip dst 64.15.0.0/16 cache allow youtube cache allow youtubeip cache allow esri # These are from http://wiki.squid-cache.org/Features/StoreUrlRewrite acl store_rewrite_list dstdomain mt.google.com mt0.google.com mt1.google.com mt2.google.com acl store_rewrite_list dstdomain mt3.google.com acl store_rewrite_list dstdomain kh.google.com kh0.google.com kh1.google.com kh2.google.com acl store_rewrite_list dstdomain kh3.google.com acl store_rewrite_list dstdomain kh.google.com.au kh0.google.com.au kh1.google.com.au acl store_rewrite_list dstdomain kh2.google.com.au kh3.google.com.au # This needs to be narrowed down quite a bit! acl store_rewrite_list dstdomain .youtube.com storeurl_access allow store_rewrite_list storeurl_access deny all storeurl_rewrite_program /usr/local/bin/store_url_rewrite 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 allow esri http_access deny all http_reply_access allow all icp_access allow all coredump_dir /usr/local/squid/var/cache # YouTube options. quick_abort_min -1 KB # This will block other streaming media. Maybe we don't want this, but using # it for now. hierarchy_stoplist cgi-bin ? acl QUERY urlpath_regex cgi-bin \? cache deny QUERY And here is the store_url_rewrite script. I added some logging: #!/usr/bin/perl use IO::File; use IO::Socket::INET; use IO::Pipe; $| = 1; $fh = new IO::File("/tmp/debug.log", "a"); $fh->print("Hello!\n"); $fh->flush(); while (<>) { chomp; #print LOG "Orig URL: " . $_ . "\n"; $fh->print("Orig URL: " . $_ . "\n"); if (m/kh(.*?)\.google\.com(.*?)\/(.*?) /) { print "http://keyhole-srv.google.com"; . $2 . ".SQUIDINTERNAL/" . $3 . "\n"; # print STDERR "KEYHOLE\n"; } elsif (m/mt(.*?)\.google\.com(.*?)\/(.*?) /) { print "http://map-srv.google.com"; . $2 . ".SQUIDINTERNAL/" . $3 . "\n"; # print STDERR "MAPSRV\n"; } elsif (m/^http:\/\/([A-Za-z]*?)-(.*?)\.(.*)\.youtube\.com\/get_video\?video_id=([^&]+).* /) { print "http://video-srv.youtube.com.SQUIDINTERNAL/get_video?video_id="; . $4 . "\n"; $fh->print("http://video-srv.youtube.com.SQUIDINTERNAL/get_video?video_id="; . $4 . "\n"); $fh->flush(); } elsif (m/^http:\/\/([A-Za-z]*?)-(.*?)\.(.*)\.youtube\.com\/get_video\?video_id=(.*) /) { # http://lax-v290.lax.youtube.com/get_video?video_id=jqx1ZmzX0k0 print "http://video-srv.youtube.com.SQUIDINTERNAL/get_video?video_id="; . $4 . "\n"; } else { print $_ . "\n"; } } Could likely remove the last elsif block at this point as it's catching on the previous one now. But this is working great! Probably some tuning yet to be done. Maybe someone could update the wiki with the new regexp syntax. Ray
