[LON-CAPA-cvs] cvs: loncom /lonnet/perl lonnet.pm

[www]

www		Thu Feb  7 18:56:06 2002 EDT

  Modified files:              
    /loncom/lonnet/perl	lonnet.pm 
  Log:
  Tries to cache course resource data. NOT VERY WELL TESTED AT ALL.
  
  
Index: loncom/lonnet/perl/lonnet.pm
diff -u loncom/lonnet/perl/lonnet.pm:1.199 loncom/lonnet/perl/lonnet.pm:1.200
--- loncom/lonnet/perl/lonnet.pm:1.199	Mon Feb  4 20:31:22 2002
+++ loncom/lonnet/perl/lonnet.pm	Thu Feb  7 18:56:06 2002
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.199 2002/02/04 15:31:22 www Exp $
+# $Id: lonnet.pm,v 1.200 2002/02/07 13:56:06 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -66,7 +66,7 @@
 # 12/18 Scott Harrison
 # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
 # YEAR=2002
-# 1/4,2/4 Gerd Kortemeyer
+# 1/4,2/4,2/7 Gerd Kortemeyer
 #
 ###
 
@@ -80,7 +80,7 @@
 qw(%perlvar %hostname %homecache %hostip %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab 
    %courselogs %accesshash $processmarker $dumpcount 
-   %coursedombuf %coursehombuf);
+   %coursedombuf %coursehombuf %courseresdatacache);
 use IO::Socket;
 use GDBM_File;
 use Apache::Constants qw(:common :http);
@@ -2024,6 +2024,38 @@
     return $result;
 }
 
+# --------------------------------------------------- Course Resourcedata Query
+
+sub courseresdata {
+    my ($coursenum,$coursedomain,@which)=@_;
+    my $coursehom=&homeserver($coursenum,$coursedomain);
+    my $hashid=$coursenum.':'.$coursedomain;
+    unless (defined($courseresdatacache{$hashid.'.time'})) {
+	unless (time-$courseresdatacache{$hashid.'.time'}<300) {
+           my $coursehom=&homeserver($coursenum,$coursedomain);
+           if ($coursehom) {
+              my $dumpreply=&reply('dump:'.$coursedomain.':'.$coursenum.
+			     ':resourcedata:.',$coursehom);
+	      unless ($dumpreply=~/^error\:/) {
+	         $courseresdatacache{$hashid.'.time'}=time;
+                 $courseresdatacache{$hashid}=$dumpreply;
+	     }
+	  }
+       }
+    }
+   my @pairs=split(/\&/,$courseresdatacache{$hashid});
+   my %returnhash=();
+   foreach (@pairs) {
+      my ($key,$value)=split(/=/,$_);
+      $returnhash{unescape($key)}=unescape($value);
+   }
+    my $item;
+   foreach $item (@which) {
+       if ($returnhash{$item}) { return $returnhash{$item}; }
+   }
+   return '';
+}
+
 # --------------------------------------------------------- Value of a Variable
 
 sub EXT {
@@ -2144,28 +2176,13 @@
 
 # -------------------------------------------------------- second, check course
 
-        my $reply=&reply('get:'.
-              $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
-              $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
-	      ':resourcedata:'.
-   &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
-   &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
-		   $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
-      if ($reply!~/^error\:/) {
-	  foreach (split(/\&/,$reply)) {
-	      if ($_) { return &unescape($_); }
-          }
-      }
-      if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
-	  &logthis("<font color=blue>WARNING:".
-                " Getting ".$reply." asking for ".$varname." for ".
-                $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
-                ' at '.
-                $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
-                ' from '.
-                $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
-                 "</font>");
-      }
+        my $coursereply=&courseresdata(
+                        $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
+                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
+                        ($seclevelr,$seclevelm,$seclevel,
+                         $courselevelr,$courselevelm,$courselevel));
+        if ($coursereply) { return $coursereply; }
+
 # ------------------------------------------------------ third, check map parms
        my %parmhash=();
        my $thisparm='';