From 877afea59e9d85cecbefa2fe01df5adc6fa252b1 Mon Sep 17 00:00:00 2001
From: Patrick J Cherry <patrick@bytemark.co.uk>
Date: Wed, 21 Nov 2012 11:57:17 +0000
Subject: Removed duplicate code from Alert#in_source_list, and
 SourceList#include.  Also cut down on DNS queries, and IPAddr conversions.

---
 lib/mauve/alert.rb       | 45 +--------------------------------------------
 lib/mauve/source_list.rb | 19 +++++++++++++------
 2 files changed, 14 insertions(+), 50 deletions(-)

diff --git a/lib/mauve/alert.rb b/lib/mauve/alert.rb
index 52c098c..4629191 100644
--- a/lib/mauve/alert.rb
+++ b/lib/mauve/alert.rb
@@ -190,50 +190,7 @@ module Mauve
       source_list = Mauve::Configuration.current.source_lists[listname]
       return false unless source_list.is_a?(SourceList)
 
-      host = self.subject
-
-      #
-      # Pick out hostnames from URIs.
-      #
-      if host =~ /^[a-z][a-z0-9+-]+:\/\//
-        begin      
-          uri = URI.parse(host)
-          host = uri.host unless uri.host.nil?
-        rescue URI::InvalidURIError => ex
-          # ugh
-          logger.warn "Did not recognise URI #{host}"
-        end
-      end
-
-      return true if source_list.list.any? do |l|
-        case l
-          when String
-            host == l
-          when Regexp
-            host =~ l
-          when IPAddr 
-            begin
-              l.include?(IPAddr.new(host))
-            rescue ArgumentError => err
-              # rescue random IPAddr argument errors
-              false
-            end
-          else
-            false
-        end
-      end
-
-      return false unless source_list.list.any?{|l| l.is_a?(IPAddr)}
-
-      @subject_ips ||= MauveResolv.get_ips_for(host).collect{|i| IPAddr.new(i)}
-
-      return false if @subject_ips.nil? or @subject_ips.empty?
-
-      return source_list.list.select{|i| i.is_a?(IPAddr)}.any? do |list_ip| 
-        @subject_ips.any?{|ip| list_ip.include?(ip)}
-      end
-      
-      return false
+      source_list.include?(self.subject)
     end
 
     # Returns the alert level 
diff --git a/lib/mauve/source_list.rb b/lib/mauve/source_list.rb
index 0596177..ad84670 100644
--- a/lib/mauve/source_list.rb
+++ b/lib/mauve/source_list.rb
@@ -123,6 +123,13 @@ module Mauve
         end
       end
 
+      host_as_ip = nil
+      begin
+        host_as_ip = IPAddr.new(host)
+      rescue ArgumentError
+        # Rescue IPAddr argument errors, i.e. host is not an IP address.
+      end
+
       return true if self.list.any? do |l|
         case l
           when String
@@ -130,17 +137,17 @@ module Mauve
           when Regexp
             host =~ l
           when IPAddr 
-            begin
-              l.include?(IPAddr.new(host))
-            rescue ArgumentError
-              # rescue random IPAddr argument errors
-              false
-            end
+            host_as_ip.is_a?(IPAddr) and l.include?(host_as_ip)
           else
             false
         end
       end
 
+      #
+      # To cut down the amount of DNS queries, we'll bail out at this point.
+      #
+      return false
+
       return false unless self.list.any?{|l| l.is_a?(IPAddr)}
 
       ips = MauveResolv.get_ips_for(host).collect{|i| IPAddr.new(i)}
-- 
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