copyright notices and licences

[rrd-graphs.git] / cgi

diff --git a/cgi b/cgi
index 5133ffb9d5f36708fd32b447e83c8002b22844f2..96282376aabff29acc3ff6421d20df427acd574c 100755 (executable)
--- a/cgi
+++ b/cgi
@@ -1,9 +1,29 @@
 #!/usr/bin/speedy -w -- -t100 -M1
+#
+# Main CGI program's logic; must be run inside a lock.
+
+# rrd-graphs/cgi - part of rrd-graphs, a tool for online graphs
+# Copyright 2010, 2012 Ian Jackson
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 
 use strict qw(vars);
 use CGI::SpeedyCGI qw/:standard -no_xhtml/;
 use CGI qw/:standard -no_xhtml/;
 use POSIX;
+use MD5;
 
 sub fail ($) {
     print(header(-status=>500),
@@ -396,13 +416,16 @@ sub num_param ($$$$) {
 
 our $group= param('graph');
 
+my $defwidth= 370;
+my $defheight= 200;
+
 our $elem= param('elem');
 if (defined $elem) {
     my $g= $graphs{$section,$group,$elem};
     die unless $g;
 
-    my $width= num_param('w',370,100,1600);
-    my $height= num_param('h',200,100,1600);
+    my $width= num_param('w',$defwidth,100,1600);
+    my $height= num_param('h',$defheight,100,1600);
 
     my $sloth= param('sloth');
     die unless defined $sloth;
@@ -411,9 +434,6 @@ if (defined $elem) {
     my $end= $g->{TimeRanges}[$sloth];
     die unless defined $end;
 
-    my $cacheid= "$section!$group!$elem!$sloth!$width!$height";
-    my $cachepath= "cache/$cacheid.png";
-
     my @args= @{ $g->{Args} };
     s,\<interval/(\d+)\>, $end/$1 ,ge foreach @args;
     unshift @args, qw(--end now --start), "end-${end}s";
@@ -425,6 +445,10 @@ if (defined $elem) {
     unshift @args, '-t', $title, '-w',$width, '-h',$height;
     unshift @args, qw(-a PNG --full-size-mode);
 
+    my $cacheid= "$section!$group!$elem!$sloth!$width!$height!";
+    $cacheid .= unpack "H*", MD5->hash(join '\0', @args);
+    my $cachepath= "cache/$cacheid.png";
+
     if (param('debug')) {
         print((join "\n",@args),"\n"); exit 0;
     }
@@ -487,7 +511,8 @@ if (defined $detail) {
            my $imgurl= "$self?graph=$detail&section=$section".
                "&sloth=$tsloth&elem=$elem";
            print a({href=>"$imgurl&w=780&h=800"},
-                   img({src=>$imgurl, alt=>''}));
+                   img({src=>$imgurl, alt=>'',
+                        width=>$defwidth, height=>$defheight}));
        }
     }
     print end_html();
@@ -533,7 +558,7 @@ foreach my $group (@{ $section_groups{$section} }) {
     foreach my $elem (@$elems) {
        my $g= $graphs{$ref_section,$ref_group,$elem};
        print img({src=>"$imgurl&elem=$elem&sloth=".($sloth + $g->{Slower}),
-                  alt=>''});
+                  alt=>'', width=>$defwidth, height=>$defheight});
     }
     print "</span>";
     print "</a>\n";