From 66cb73cd2c475094d76911764addaaf3cc97ea3b Mon Sep 17 00:00:00 2001
From: fredrik <fredrik@959494ce-11ee-0310-bf91-de5d638817bd>
Date: Mon, 15 Aug 2005 01:40:43 +0000
Subject: [PATCH] Added cache and better error handling.

git-svn-id: svn+ssh://svn.dolda2000.com/srv/svn/repos/src/utils@310 959494ce-11ee-0310-bf91-de5d638817bd
---
 ANN.pm | 50 ++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/ANN.pm b/ANN.pm
index 2ae48cd..dfa4b41 100644
--- a/ANN.pm
+++ b/ANN.pm
@@ -1,21 +1,45 @@
 package Anime::ANN;
 
+use POSIX;
+use Digest::MD5;
 use LWP::UserAgent;
 use HTML::Entities;
 
 $ver = "0.1";
+$ua = LWP::UserAgent->new;
+$ua->agent("ANNData/$ver ");
+$usecache = 1;
 
 sub _get
 {
-    my($uri, $ua, $res);
+    my($uri, $cname, $res);
     ($uri) = @_;
 
-    $ua = LWP::UserAgent->new;
-    $ua->agent("ANNData/$ver ");
-
+    $cname = $ENV{"HOME"} . "/.ann/";
+    mkdir $cname unless -e $cname;
+    $cname .= "cache/";
+    mkdir $cname unless -e $cname;
+    $cname .= Digest::MD5::md5_hex $uri;
+    if($usecache && -e $cname) {
+	my(@s);
+	@s = stat $cname;
+	if((time - $s[9]) < 86400) {
+	    my($buf);
+	    open CACHE, "<:utf8", $cname;
+	    $res .= $buf while read CACHE, $buf, 1024;
+	    close CACHE;
+	    return $res;
+	}
+    }
+    
     $res = $ua->request(HTTP::Request->new("GET", "$uri"));
-
-    die "could not fetch $uri\n" unless $res->is_success;
+    
+    if(open CACHE, ">:utf8", $cname) {
+	print CACHE $res->content;
+	close CACHE;
+    }
+    
+    return undef unless $res->is_success;
     return $res->content;
 }
 
@@ -26,14 +50,16 @@ sub getlist
     
     $il = uc(($name =~ /^(.)/)[0]);
     $il = "9" if (!($il =~ /[A-Z]/));
-    $html = _get "http://www.animenewsnetwork.com/encyclopedia/anime.php?list=$il";
+    if(!($html = _get "http://www.animenewsnetwork.com/encyclopedia/anime.php?list=$il")) {
+	return undef;
+    }
     
     # The only way to recognize entries that seems sure is to look
     # after the "HOVERLINE" class.
     
     push @ret, $1 while $html =~ /<A\s.*CLASS=HOVERLINE\s.*>.*<FONT.*>([^<>]*$name[^<>]*)<\/FONT/ig;
     
-    return(@ret);
+    return @ret;
 }
 
 sub getid
@@ -43,7 +69,9 @@ sub getid
     
     $il = uc(($name =~ /^(.)/)[0]);
     $il = "9" if (!($il =~ /[A-Z]/));
-    $html = _get "http://www.animenewsnetwork.com/encyclopedia/anime.php?list=$il";
+    if(!($html = _get "http://www.animenewsnetwork.com/encyclopedia/anime.php?list=$il")) {
+	return undef;
+    }
     
     # The only way to recognize entries that seems sure is to look
     # after the "HOVERLINE" class.
@@ -97,7 +125,9 @@ sub getseries
     my($id, $buf, $html, %ret);
     ($id) = @_;
     
-    $html = _get geturl $id;
+    if(!($html = _get geturl $id)) {
+	return undef;
+    }
     
     $ret{"url"} = geturl $id;
     ($buf) = ($html =~ /\<TITLE\>Anime News Network - ([^<]*)<\/TITLE>/);
-- 
2.11.0