Re: [squid-users] Minimal caching time squid honors

[Thomas Ristic]

Am Fr, den 17.12.2004 schrieb Henrik Nordstrom um 19:02:

> > Is there a way to disable this with a configuration directive?
> 
> No, only by modifying the source. See refresh.c

Thanks for the hint! Does this make sense? Do I get this right?

Regards
Thomas 


diff -Nur squid-2.5.STABLE7.orig/src/cf.data.pre squid-2.5.STABLE7/src/cf.data.pre
--- squid-2.5.STABLE7.orig/src/cf.data.pre	2004-10-08 19:41:10.000000000 +0200
+++ squid-2.5.STABLE7/src/cf.data.pre	2004-12-17 21:47:42.132485508 +0100
@@ -4017,4 +4017,18 @@
 	until all the child processes have been started.
 DOC_END
 
+NAME: minimum_expiry_time
+COMMENT: (seconds)
+TYPE: time_t
+LOC: Config.minimum_expiry_time
+DEFAULT: 60 seconds
+DOC_START
+	The minimum caching time according to (Expires - Date)
+	Headers Squid honors if the object can't be revalidated 
+	defaults to 60 seconds. In reverse proxy enorinments it 
+	might be desirable to honor shorter object lifetimes. It 
+	is most likely better to make your server return a 
+	meaningful Last-Modified header.
+DOC_END
+
 EOF
diff -Nur squid-2.5.STABLE7.orig/src/refresh.c squid-2.5.STABLE7/src/refresh.c
--- squid-2.5.STABLE7.orig/src/refresh.c	2002-07-18 11:22:17.000000000 +0200
+++ squid-2.5.STABLE7/src/refresh.c	2004-12-17 22:08:46.887912258 +0100
@@ -331,7 +331,12 @@
      * 60 seconds delta, to avoid objects which expire almost
      * immediately, and which can't be refreshed.
      */
-    int reason = refreshCheck(entry, NULL, 60);
+    int reason;
+    if (Config.minimum_expiry_time) {
+    	reason = refreshCheck(entry, NULL, Config.minimum_expiry_time);
+    } else {
+    	reason = refreshCheck(entry, NULL, 60);
+    }
     refreshCounts[rcStore].total++;
     refreshCounts[rcStore].status[reason]++;
     if (reason < 200)
diff -Nur squid-2.5.STABLE7.orig/src/structs.h squid-2.5.STABLE7/src/structs.h
--- squid-2.5.STABLE7.orig/src/structs.h	2004-10-06 00:56:36.000000000 +0200
+++ squid-2.5.STABLE7/src/structs.h	2004-12-17 21:21:28.414182041 +0100
@@ -706,6 +706,7 @@
     } warnings;
     char *store_dir_select_algorithm;
     int sleep_after_fork;	/* microseconds */
+    time_t minimum_expiry_time;	/* seconds */
     external_acl *externalAclHelperList;
 };