o protocol.rb: ProtocolError can take data

o  http.rb:  raise exception with response


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@739 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/http.rb

@@ -54,6 +54,20 @@ module Net
 
   If called as iterator, give a part String of entity body.
 
+  Note:
+  If status is not 2xx(success), ProtocolError exception is
+  raised. At that time, you can get Response object from 
+  execption object. (same in head/post)
+
+    ex.
+
+    begin
+      head, body = http.get(...)
+    rescue ProtoRetriableError
+      response = $!.data
+      ...
+    end
+
 : head( path, header = nil )
   get only header from "path" on connecting host.
   "header" is a Hash like { 'Accept' => '*/*', ... }.
@@ -375,7 +389,9 @@ All "key" is case-insensitive.
     end
 
     def value
-      error! unless SuccessCode === self
+      unless SuccessCode === self then
+        error! self
+      end
     end
 
   end

lib/net/protocol.rb

@@ -68,7 +68,7 @@ Object
 
   class Protocol
 
-    Version = '1.1.20'
+    Version = '1.1.21'
 
     class << self
 
@@ -295,8 +295,8 @@ Object
     attr_reader :code_type, :code, :message
     alias msg message
 
-    def error!
-      raise @code_type.error_type, @code + ' ' + Net.quote(@message)
+    def error!( data = nil )
+      raise code_type.error_type.new( code + ' ' + Net.quote(msg), data )
     end
 
   end
@@ -312,6 +312,17 @@ Object
   class ProtoRetriableError    < ProtocolError; end
   ProtocRetryError = ProtoRetriableError
 
+  class ProtocolError
+  
+    def initialize( msg, data )
+      super msg
+      @data = data
+    end
+
+    attr :data
+  
+  end
+
 
   class Code