uri/generic.rb: fix exception on non-IP format

* lib/uri/generic.rb (URI::Generic#find_proxy): match IP address
  no_proxy against resolved self IP address.  [Fix GH-1513]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57359 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/generic.rb

@@ -1531,14 +1531,14 @@ module URI
           if (!port || self.port == port.to_i)
             if /(\A|\.)#{Regexp.quote host}\z/i =~ self.host
               return nil
-            else
+            elsif addr
               require 'ipaddr'
               return nil if
                 begin
                   IPAddr.new(host)
                 rescue IPAddr::InvalidAddressError
                   next
-                end.include?(self.host)
+                end.include?(addr)
             end
           end
         }

test/uri/test_generic.rb

@@ -839,6 +839,31 @@ class URI::TestGeneric < Test::Unit::TestCase
     with_proxy_env('http_proxy'=>'http://127.0.0.1:8080', 'no_proxy'=>'192.0.2.2') {|env|
       assert_equal(URI('http://127.0.0.1:8080'), URI("http://192.0.2.1/").find_proxy(env))
       assert_nil(URI("http://192.0.2.2/").find_proxy(env))
+
+      getaddress = IPSocket.method(:getaddress)
+      begin
+        class << IPSocket
+          undef getaddress
+          def getaddress(host)
+            host == "example.org" or raise
+            "192.0.2.1"
+          end
+        end
+        assert_equal(URI('http://127.0.0.1:8080'), URI.parse("http://example.org").find_proxy(env))
+        class << IPSocket
+          undef getaddress
+          def getaddress(host)
+            host == "example.org" or raise
+            "192.0.2.2"
+          end
+        end
+        assert_nil(URI.parse("http://example.org").find_proxy(env))
+      ensure
+        IPSocket.singleton_class.class_eval do
+          undef getaddress
+          define_method(:getaddress, getaddress)
+        end
+      end
     }
     with_proxy_env('http_proxy'=>'http://127.0.0.1:8080', 'no_proxy'=>'example.org') {|env|
       assert_nil(URI("http://example.org/").find_proxy(env))