Better support for unicode path and values.

Added WSF_REQUEST.percent_encoded_path_info: READABLE_STRING_8
    to keep url encoded path info, as it is useful for specific component

The router is now using WSF_REQUEST.percent_encoded_path_info
    since URI_TEMPLATE are handling URI (and not IRI)
    this fixes an issue with unicode path parameters.

This should not break existing code, and this fixes various unicode related issues related
   to PATH parameter and path info
   but also any component using file names.

(required EiffelStudio >= 7.2)

library/text/encoder/src/utf8_encoder.e

@@ -15,8 +15,6 @@ class
 inherit
 	ENCODER [READABLE_STRING_32, READABLE_STRING_8]
 
-	UTF8_ENCODER_HELPER
-
 	PLATFORM
 		export
 			{NONE} all
@@ -37,9 +35,13 @@ feature -- Encoder
 
 	encoded_string (s: READABLE_STRING_32): STRING_8
 			-- UTF8-encoded value of `s'.
+		do
+			Result := general_encoded_string (s)
+		end
+
+	general_encoded_string (s: READABLE_STRING_GENERAL): STRING_8
 		do
 			Result := utf32_to_utf8 (s)
-			has_error := not last_conversion_successful
 		end
 
 feature -- Decoder
@@ -48,11 +50,34 @@ feature -- Decoder
 			-- The UTF8-encoded equivalent of the given string
 		do
 			Result := utf8_to_utf32 (v)
-			has_error := not last_conversion_successful
+			has_error := not is_valid_utf8 (v)
+		end
+
+feature {NONE} -- UTF implementation
+
+	utf32_to_utf8 (s: READABLE_STRING_GENERAL): STRING_8
+		local
+			utf: UTF_CONVERTER
+		do
+			Result := utf.utf_32_string_to_utf_8_string_8 (s)
+		end
+
+	utf8_to_utf32 (s: READABLE_STRING_8): STRING_32
+		local
+			utf: UTF_CONVERTER
+		do
+			Result := utf.utf_8_string_8_to_string_32 (s)
+		end
+
+	is_valid_utf8 (s: READABLE_STRING_8): BOOLEAN
+		local
+			utf: UTF_CONVERTER
+		do
+			Result := utf.is_valid_utf_8_string_8 (s)
 		end
 
 note
-	copyright: "2011-2012, Eiffel Software and others"
+	copyright: "2011-2013, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software