Upgraded to open_id_authentication plugin at 00d8bc7f97 and unpacked ruby-openid gem version 2.1.2.

vendor/gems/ruby-openid-2.1.2/lib/openid/kvpost.rb

@@ -0,0 +1,58 @@
+require "openid/message"
+require "openid/fetchers"
+
+module OpenID
+  # Exception that is raised when the server returns a 400 response
+  # code to a direct request.
+  class ServerError < OpenIDError
+    attr_reader :error_text, :error_code, :message
+
+    def initialize(error_text, error_code, message)
+      super(error_text)
+      @error_text = error_text
+      @error_code = error_code
+      @message = message
+    end
+
+    def self.from_message(msg)
+      error_text = msg.get_arg(OPENID_NS, 'error',
+                               '<no error message supplied>')
+      error_code = msg.get_arg(OPENID_NS, 'error_code')
+      return self.new(error_text, error_code, msg)
+    end
+  end
+
+  class KVPostNetworkError < OpenIDError
+  end
+  class HTTPStatusError < OpenIDError
+  end
+
+  class Message
+    def self.from_http_response(response, server_url)
+      msg = self.from_kvform(response.body)
+      case response.code.to_i
+      when 200
+        return msg
+      when 206
+        return msg
+      when 400
+        raise ServerError.from_message(msg)
+      else
+        error_message = "bad status code from server #{server_url}: "\
+        "#{response.code}"
+        raise HTTPStatusError.new(error_message)
+      end
+    end
+  end
+
+  # Send the message to the server via HTTP POST and receive and parse
+  # a response in KV Form
+  def self.make_kv_post(request_message, server_url)
+    begin
+      http_response = self.fetch(server_url, request_message.to_url_encoded)
+    rescue Exception
+      raise KVPostNetworkError.new("Unable to contact OpenID server: #{$!.to_s}")
+    end
+    return Message.from_http_response(http_response, server_url)
+  end
+end