-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 10/12/2014 6:04 a.m., Ulises Nicolini wrote: > Hello, > > I'm working with some scripts to prefetch content but having some > trouble, what I can't work out is a way to check if a given object > is already cached, in other words, I want to check if the object > I'm going to download is going to hit, in which case I can ignore > it. I've read squidclient man page but could not find something > like it > While HIT means cached object was used, an object being in cache does not mean it will HIT. An object in cache can be stale, or could be a variant different from what will be needed in future. Pre-caching in HTTP has not been of much use since HTTP/1.1 started getting popular. The HTTP/1.0 concept of HIT/MISS got extended and expanded to include near-HIT or near-MISS or shared-HIT. Back to your question... The way to check if an object is in cache is to fetch it. If it was already there it will be refreshed, and if it was missing it may now be cached (if cacheable). If you want to do the test without risking upstream bandwidth use the squidclient parameter -H 'Cache-Control:only-if-cached\n' which will return 200 status only if the cache does contain the object matching the request. Amos -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQEcBAEBAgAGBQJUiGldAAoJELJo5wb/XPRjfdgIANEiy8Zbo3Yfo64hco//khUI wf9GHxViAGEH2LmDopDrjxfmHsOjeZoZoeepCGh3NgHgGOaFo0wQAw1uYUd0QBxY 15YzLEyb5WFo/L6BmQM344RolFOrqygY+tNVQabyUWRZ9h0iMahStpOm7TZY44Ih pPYyByNJLRTiixCtPDtqfCPgc+1dL0ZHjvc+//iw48HIocx9dmv8UEfFPMOsyGO4 +0LBXPvdYG3ccBpXJjJ9fYURR5G7EuTi3lnOvwR4Cf7vJyd8v06qjCK+yT20o6O4 A4MgAvbRN6eLTY9RZ6nnlbzqDmBnS8g19bjedhOkPx8mPWi4xeZWfUF8U8MBIMQ= =FRb2 -----END PGP SIGNATURE----- _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
