embed response from proxy in ProxyConnectionError

lib/excon/error.rb

@@ -50,7 +50,17 @@ class InvalidHeaderKey < Error; end
     class InvalidHeaderValue < Error; end
     class Timeout < Error; end
     class ResponseParse < Error; end
-    class ProxyConnectionError < Error; end
+
+    class ProxyConnectionError < Error
+      attr_reader :request, :response
+
+      def initialize(msg, request = nil, response = nil)
+        super(msg)
+        @request = request
+        @response = response
+      end
+    end
+
     class ProxyParse < Error; end
     class TooManyRedirects < Error; end
 

lib/excon/ssl_socket.rb

@@ -109,7 +109,7 @@ def initialize(data = {})
         # eat the proxy's connection response
         response = Excon::Response.parse(self,  :expects => 200, :method => 'CONNECT')
         if response[:response][:status] != 200
-          raise(Excon::Errors::ProxyConnectionError.new("proxy connection is not exstablished"))
+          raise(Excon::Errors::ProxyConnectionError.new("proxy connection could not be established", request, response))
         end
       end