merge revision(s) 42930: [Backport #8898]

	* lib/uri/generic.rb (URI::Generic.find_proxy): return nil if
	  http_proxy environment variable is empty string.
	  [ruby-core:57140] [Bug #8898]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43062 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 17 deletions

diff --git a/lib/uri/generic.rb b/lib/uri/generic.rb
index 387682b5b5..b1195fdf0b 100644
--- a/lib/uri/generic.rb
+++ b/lib/uri/generic.rb
@@ -1647,31 +1647,29 @@ module URI
         proxy_uri = ENV[name] || ENV[name.upcase]
       end
 
-      if proxy_uri && self.hostname
+      if proxy_uri.nil? || proxy_uri.empty?
+        return nil
+      end
+
+      if self.hostname
         require 'socket'
         begin
           addr = IPSocket.getaddress(self.hostname)
-          proxy_uri = nil if /\A127\.|\A::1\z/ =~ addr
+          return nil if /\A127\.|\A::1\z/ =~ addr
         rescue SocketError
         end
       end
 
-      if proxy_uri
-        proxy_uri = URI.parse(proxy_uri)
-        name = 'no_proxy'
-        if no_proxy = ENV[name] || ENV[name.upcase]
-          no_proxy.scan(/([^:,]*)(?::(\d+))?/) {|host, port|
-            if /(\A|\.)#{Regexp.quote host}\z/i =~ self.host &&
-               (!port || self.port == port.to_i)
-              proxy_uri = nil
-              break
-            end
-          }
-        end
-        proxy_uri
-      else
-        nil
+      name = 'no_proxy'
+      if no_proxy = ENV[name] || ENV[name.upcase]
+        no_proxy.scan(/([^:,]*)(?::(\d+))?/) {|host, port|
+          if /(\A|\.)#{Regexp.quote host}\z/i =~ self.host &&
+            (!port || self.port == port.to_i)
+            return nil
+          end
+        }
       end
+      URI.parse(proxy_uri)
     end
   end
 end