diff --git a/library/network/http_client/http_client-safe.ecf b/library/network/http_client/http_client-safe.ecf
index 7f249cee..652bd060 100644
--- a/library/network/http_client/http_client-safe.ecf
+++ b/library/network/http_client/http_client-safe.ecf
@@ -33,6 +33,7 @@
 		</library>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri-safe.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_null" location="$|spec\null\" recursive="true"/>
 			<cluster name="spec_net" location="$|spec\net\">
 				<condition>
diff --git a/library/network/http_client/http_client.ecf b/library/network/http_client/http_client.ecf
index b4694aeb..704ee655 100644
--- a/library/network/http_client/http_client.ecf
+++ b/library/network/http_client/http_client.ecf
@@ -33,6 +33,7 @@
 		</library>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_null" location="$|spec\null\" recursive="true"/>
 			<cluster name="spec_net" location="$|spec\net\">
 				<condition>
diff --git a/library/network/http_client/src/http_client_request.e b/library/network/http_client/src/http_client_request.e
index 6fcd7307..087484d9 100644
--- a/library/network/http_client/src/http_client_request.e
+++ b/library/network/http_client/src/http_client_request.e
@@ -196,73 +196,8 @@ feature -- Settings
 			Result := session.is_insecure
 		end
 
-feature {NONE} -- Utilities
-
-	append_parameters_to_url (a_parameters: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_32]; a_url: STRING)
-			-- Append parameters `a_parameters' to `a_url'
-		require
-			a_url_attached: a_url /= Void
-		local
-			l_first_param: BOOLEAN
-		do
-			if a_parameters.count > 0 then
-				if a_url.index_of ('?', 1) > 0 then
-					l_first_param := False
-				elseif a_url.index_of ('&', 1) > 0 then
-					l_first_param := False
-				else
-					l_first_param := True
-				end
-
-				from
-					a_parameters.start
-				until
-					a_parameters.after
-				loop
-					if l_first_param then
-						a_url.append_character ('?')
-					else
-						a_url.append_character ('&')
-					end
-					a_url.append (urlencode (a_parameters.key_for_iteration))
-					a_url.append_character ('=')
-					a_url.append (urlencode (a_parameters.item_for_iteration))
-					l_first_param := False
-					a_parameters.forth
-				end
-			end
-		end
-
-feature {NONE} -- Utilities: encoding
-
-	url_encoder: URL_ENCODER
-		once
-			create Result
-		end
-
-	urlencode (s: READABLE_STRING_32): READABLE_STRING_8
-			-- URL encode `s'
-		do
-			Result := url_encoder.encoded_string (s)
-		end
-
-	urldecode (s: READABLE_STRING_8): READABLE_STRING_32
-			-- URL decode `s'
-		do
-			Result := url_encoder.decoded_string (s)
-		end
-
-	stripslashes (s: STRING): STRING
-		do
-			Result := s.string
-			Result.replace_substring_all ("\%"", "%"")
-			Result.replace_substring_all ("\'", "'")
-			Result.replace_substring_all ("\/", "/")
-			Result.replace_substring_all ("\\", "\")
-		end
-
 note
-	copyright: "2011-2016, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/src/http_client_request_context.e b/library/network/http_client/src/http_client_request_context.e
index fc91c0f5..d8e7fe60 100644
--- a/library/network/http_client/src/http_client_request_context.e
+++ b/library/network/http_client/src/http_client_request_context.e
@@ -142,16 +142,16 @@ feature -- Element change
 			end
 		end
 
-	add_query_parameter (k: READABLE_STRING_32; v: READABLE_STRING_32)
+	add_query_parameter (k: READABLE_STRING_GENERAL; v: READABLE_STRING_GENERAL)
 			-- Add a query parameter `k=v'.
 		do
-			query_parameters.force (v, k)
+			query_parameters.force (v.to_string_32, k.to_string_32)
 		end
 
-	add_form_parameter (k: READABLE_STRING_32; v: READABLE_STRING_32)
+	add_form_parameter (k: READABLE_STRING_GENERAL; v: READABLE_STRING_GENERAL)
 			-- Add a form parameter `k'= `v'.
 		do
-			form_parameters.force (v, k)
+			form_parameters.force (v.to_string_32, k.to_string_32)
 		end
 
 	set_credentials_required (b: BOOLEAN)
@@ -236,18 +236,62 @@ feature -- Status setting
 			end
 		end
 
+feature -- URL helpers
+
+	append_query_parameters_to_url (a_url: STRING)
+			-- Append parameters `a_parameters' to `a_url'
+		require
+			a_url_attached: a_url /= Void
+		local
+			l_first_param: BOOLEAN
+		do
+			if
+				attached query_parameters as l_query_parameters and then
+				not l_query_parameters.is_empty
+			then
+				if a_url.index_of ('?', 1) > 0 then
+					l_first_param := False
+				elseif a_url.index_of ('&', 1) > 0 then
+					l_first_param := False
+				else
+					l_first_param := True
+				end
+
+				across
+					query_parameters as ic
+				loop
+					if l_first_param then
+						a_url.append_character ('?')
+					else
+						a_url.append_character ('&')
+					end
+					l_first_param := False
+					uri_percent_encoder.append_query_name_encoded_string_to (ic.key, a_url)
+					a_url.append_character ('=')
+					uri_percent_encoder.append_query_value_encoded_string_to (ic.item, a_url)
+				end
+			end
+		end
+
 feature -- Conversion helpers
 
 	query_parameters_to_url_encoded_string: STRING_8
 			-- `query_parameters' as url-encoded string.
 		do
-			Result := parameters_to_url_encoded_string (query_parameters)
+			Result := parameters_to_uri_percent_encoded_string (query_parameters)
+		end
+
+	form_parameters_to_x_www_form_url_encoded_string: STRING_8
+			-- `form_parameters' as x-www-form-urlencoded string.	
+		do
+			Result := parameters_to_x_www_form_urlencoded_string (form_parameters)
 		end
 
 	form_parameters_to_url_encoded_string: STRING_8
 			-- `form_parameters' as url-encoded string.	
+		obsolete "Use form_parameters_to_x_www_form_url_encoded_string [2017-05-31]"
 		do
-			Result := parameters_to_url_encoded_string (form_parameters)
+			Result := form_parameters_to_x_www_form_url_encoded_string
 		end
 
 feature {NONE} -- Implementation
@@ -271,6 +315,52 @@ feature {NONE} -- Implementation
 			end
 		end
 
+	parameters_to_uri_percent_encoded_string (ht: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_32]): STRING_8
+			-- Build query urlencoded string using parameters from `ht'.
+		do
+			create Result.make (64)
+			across
+				ht as ic
+			loop
+				if not Result.is_empty then
+					Result.append_character ('&')
+				end
+				uri_percent_encoder.append_query_name_encoded_string_to (ic.key, Result)
+				Result.append_character ('=')
+				uri_percent_encoder.append_query_value_encoded_string_to (ic.item, Result)
+			end
+		end
+
+	parameters_to_x_www_form_urlencoded_string (ht: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_32]): STRING_8
+			-- Build x-www-form-urlencoded string using parameters from `ht'.
+		do
+			create Result.make (64)
+			from
+				ht.start
+			until
+				ht.after
+			loop
+				if not Result.is_empty then
+					Result.append_character ('&')
+				end
+				Result.append (x_www_form_url_encoder.encoded_string (ht.key_for_iteration))
+				Result.append_character ('=')
+				Result.append (x_www_form_url_encoder.encoded_string (ht.item_for_iteration))
+				ht.forth
+			end
+		end
+
+	x_www_form_url_encoder: X_WWW_FORM_URL_ENCODER
+			-- Shared x-www-form-urlencoded encoder.
+		once
+			create Result
+		end
+
+	uri_percent_encoder: URI_PERCENT_ENCODER
+		once
+			create Result
+		end
+
 	url_encoder: URL_ENCODER
 			-- Shared URL encoder.
 		once
@@ -278,7 +368,7 @@ feature {NONE} -- Implementation
 		end
 
 note
-	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/src/http_client_session.e b/library/network/http_client/src/http_client_session.e
index f5342695..5272173e 100644
--- a/library/network/http_client/src/http_client_session.e
+++ b/library/network/http_client/src/http_client_session.e
@@ -60,28 +60,10 @@ feature -- Access
 
 	url (a_path: READABLE_STRING_8; ctx: detachable HTTP_CLIENT_REQUEST_CONTEXT): STRING_8
 			-- Url computed from Current and `ctx' data.
-		local
-			s: STRING_8
-			url_encoder: URL_ENCODER
 		do
 			Result := base_url + a_path
 			if ctx /= Void then
-				create s.make_empty
-				create url_encoder
-				across
-					ctx.query_parameters as q
-				loop
-					if not s.is_empty then
-						s.append_character ('&')
-					end
-					s.append (url_encoder.encoded_string (q.key))
-					s.append_character ('=')
-					s.append (url_encoder.encoded_string (q.item))
-				end
-				if not s.is_empty then
-					Result.append_character ('?')
-					Result.append (s)
-				end
+				ctx.append_query_parameters_to_url (Result)
 			end
 		end
 
@@ -420,7 +402,7 @@ feature -- Element change
 		end
 
 note
-	copyright: "2011-2016, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/src/implementation/uri_percent_encoder.e b/library/network/http_client/src/implementation/uri_percent_encoder.e
new file mode 100644
index 00000000..9e0d0396
--- /dev/null
+++ b/library/network/http_client/src/implementation/uri_percent_encoder.e
@@ -0,0 +1,628 @@
+note
+	description: "[
+				Component to handle percent encoding
+
+				WARNING: THIS IS A COPY FROM $ISE_LIBRARY/library/text/uri library.
+				In the future, http_client will use directly the `uri` library.
+			]"
+	date: "$Date$"
+	revision: "$Revision$"
+	EIS: "name=Percent-encoding", "protocol=URI", "src=http://en.wikipedia.org/wiki/Percent-encoding"
+
+class
+	URI_PERCENT_ENCODER
+
+feature -- Percent encoding
+
+	append_percent_encoded_string_to (s: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append `s' as percent-encoded value to `a_result'
+		local
+			i,n: INTEGER
+		do
+			from
+				i := 1
+				n := s.count
+			until
+				i > n
+			loop
+				append_encoded_character_code_to (s.code (i), a_result)
+				i := i + 1
+			end
+		end
+
+	append_query_name_encoded_string_to (s: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append `s' as encoded for URI query name to `a_result'
+		local
+			i,n: INTEGER
+		do
+			from
+				i := 1
+				n := s.count
+			until
+				i > n
+			loop
+				append_query_name_encoded_character_code_to (s.code (i), a_result)
+				i := i + 1
+			end
+		end
+
+	append_query_value_encoded_string_to (s: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append `s' as encoded for URI query value to `a_result'.
+		local
+			i,n: INTEGER
+		do
+			from
+				i := 1
+				n := s.count
+			until
+				i > n
+			loop
+				append_query_value_encoded_character_code_to (s.code (i), a_result)
+				i := i + 1
+			end
+		end
+
+	append_path_segment_encoded_string_to (s: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append `a_string' as encoded for URI path segment to `a_result'
+		local
+			i,n: INTEGER
+		do
+			from
+				i := 1
+				n := s.count
+			until
+				i > n
+			loop
+				append_path_segment_encoded_character_code_to (s.code (i), a_result)
+				i := i + 1
+			end
+		end
+
+	append_www_form_url_encoded_string_to (s: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append `a_string' as www-form-urlencoded value to `a_result'.
+			-- The main difference with `append_percent_encoded_string_to` is the encoding of space using '+'.
+		local
+			i,n: INTEGER
+		do
+			from
+				i := 1
+				n := s.count
+			until
+				i > n
+			loop
+				inspect s.code (i)
+				when 32 then -- space: 32 ' '
+					a_result.append_code (43) -- 43 '+'
+				else
+					append_encoded_character_code_to (s.code (i), a_result)
+				end
+				i := i + 1
+			end
+		end
+
+feature {NONE} -- URI building helpers		
+
+	append_encoded_character_code_to (c: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append character code `c' as query name encoded content into `a_result'.
+		do
+			if
+					--| unreserved ALPHA / DIGIT
+				   (48 <= c and c <= 57)  -- DIGIT: 0 .. 9
+				or (65 <= c and c <= 90)  -- ALPHA: A .. Z
+				or (97 <= c and c <= 122) -- ALPHA: a .. z
+			then
+				a_result.append_code (c)
+			else
+				inspect c
+				when
+					45, 46, 95, 126 -- unreserved characters: -._~
+				then
+					a_result.append_code (c)
+				when
+					58, 64, -- reserved =+ gen-delims: : @
+					33, 36, 38, 39, 40, 41, 42, -- reserved =+ sub-delims: ! $ & ' ( ) *
+					43, 44, 59, 61, -- reserved = sub-delims: + , ; =
+					37 -- percent encoding: %
+				then
+					append_percent_encoded_character_code_to (c, a_result)
+				else
+					append_percent_encoded_character_code_to (c, a_result)
+				end
+			end
+		end
+
+	append_query_name_encoded_character_code_to (c: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append character code `a_code' as query name encoded content into `a_result'.
+		do
+			inspect c
+			when 61 then -- equal sign: =
+				append_percent_encoded_character_code_to (c, a_result)
+			else
+				append_query_value_encoded_character_code_to (c, a_result)
+			end
+		end
+
+	append_query_value_encoded_character_code_to (c: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append character code `a_code' as query value encoded content into `a_result'.
+		do
+			inspect c
+			when 32 then -- Space
+				a_result.append_code (43) -- 43 '+'
+			when
+				39, -- '
+				58, 64, -- reserved =+ gen-delims: : @
+				33, 36, 40, 41, 42, -- reserved =+ sub-delims: ! $ ( ) *
+				44, 59, 61 -- reserved = sub-delims: , ; =
+			then
+				a_result.append_code (c)
+			when
+				47, -- slash: /
+				63  -- question mark ?
+			then
+				a_result.append_code (c)
+			else
+				append_encoded_character_code_to (c, a_result)
+			end
+		end
+
+	append_path_segment_encoded_character_code_to (c: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append character code `a_code' as query name encoded content into `a_result'.
+		do
+			append_encoded_character_code_to (c, a_result)
+		end
+
+feature -- Percent encoding: character		
+
+	append_percent_encoded_character_code_to (a_code: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append character code `a_code' as percent-encoded content into `a_result'
+		do
+			if a_code > 0xFF then
+				-- Unicode
+				append_percent_encoded_unicode_character_code_to (a_code, a_result)
+			elseif a_code > 0x7F then
+				-- Extended ASCII
+				-- This requires percent-encoding on UTF-8 converted character.
+				append_percent_encoded_unicode_character_code_to (a_code, a_result)
+			else
+				-- ASCII
+				append_percent_encoded_ascii_character_code_to (a_code, a_result)
+			end
+		ensure
+			appended: a_result.count > old a_result.count
+		end
+
+feature {NONE} -- Implementation: character encoding
+
+	append_percent_encoded_ascii_character_code_to (a_code: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append extended ascii character code `a_code' as percent-encoded content into `a_result'
+			-- Note: it does not UTF-8 convert this extended ASCII.
+		require
+			is_extended_ascii: a_code <= 0xFF
+		local
+			c: INTEGER
+		do
+			if a_code > 0xFF then
+				-- Unicode
+				append_percent_encoded_unicode_character_code_to (a_code, a_result)
+			else
+				-- Extended ASCII
+				c := a_code.to_integer_32
+				a_result.append_code (37) -- 37 '%%'
+	 			a_result.append_code (hex_digit [c |>> 4])
+	 			a_result.append_code (hex_digit [c & 0xF])
+			end
+		ensure
+			appended: a_result.count > old a_result.count
+		end
+
+	append_percent_encoded_unicode_character_code_to (a_code: NATURAL_32; a_result: STRING_GENERAL)
+			-- Append Unicode character code `a_code' as UTF-8 and percent-encoded content into `a_result'
+			-- Note: it does include UTF-8 conversion of extended ASCII and Unicode.
+		do
+			if a_code <= 0x7F then
+					-- 0xxxxxxx
+				append_percent_encoded_ascii_character_code_to (a_code, a_result)
+			elseif a_code <= 0x7FF then
+					-- 110xxxxx 10xxxxxx
+				append_percent_encoded_ascii_character_code_to ((a_code |>> 6) | 0xC0, a_result)
+				append_percent_encoded_ascii_character_code_to ((a_code & 0x3F) | 0x80, a_result)
+			elseif a_code <= 0xFFFF then
+					-- 1110xxxx 10xxxxxx 10xxxxxx
+				append_percent_encoded_ascii_character_code_to ((a_code |>> 12) | 0xE0, a_result)
+				append_percent_encoded_ascii_character_code_to (((a_code |>> 6) & 0x3F) | 0x80, a_result)
+				append_percent_encoded_ascii_character_code_to ((a_code & 0x3F) | 0x80, a_result)
+			else
+					-- c <= 1FFFFF - there are no higher code points
+					-- 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+				append_percent_encoded_ascii_character_code_to ((a_code |>> 18) | 0xF0, a_result)
+				append_percent_encoded_ascii_character_code_to (((a_code |>> 12) & 0x3F) | 0x80, a_result)
+				append_percent_encoded_ascii_character_code_to (((a_code |>> 6) & 0x3F) | 0x80, a_result)
+				append_percent_encoded_ascii_character_code_to ((a_code & 0x3F) | 0x80, a_result)
+			end
+		ensure
+			appended: a_result.count > old a_result.count
+		end
+
+feature -- Percent decoding
+
+	append_percent_decoded_string_to (v: READABLE_STRING_GENERAL; a_result: STRING_GENERAL)
+			-- Append to `a_result' a string equivalent to the percent-encoded string `v'
+			--| Note that is `a_result' is a STRING_8, any Unicode character will be kept as UTF-8
+		local
+			i,n: INTEGER
+			c: NATURAL_32
+			pr: CELL [INTEGER]
+			a_result_is_string_32: BOOLEAN
+		do
+			a_result_is_string_32 := attached {STRING_32} a_result
+			from
+				i := 1
+				create pr.put (i)
+				n := v.count
+			until
+				i > n
+			loop
+				c := v.code (i)
+				inspect c
+				when 43 then -- 43 '+'
+						-- Some implementation are replacing spaces with "+" instead of "%20"
+					a_result.append_code (32) -- 32 ' '
+				when 37 then -- 37 '%%'
+						-- An escaped character ?
+					if i = n then -- Error?
+						a_result.append_code (c)
+					else
+						if a_result_is_string_32 then
+								-- Convert UTF-8 to UTF-32
+							pr.replace (i)
+							c := next_percent_decoded_unicode_character_code (v, pr)
+							a_result.append_code (c)
+							i := pr.item
+						else
+								-- Keep UTF-8
+							pr.replace (i)
+							c := next_percent_decoded_character_code (v, pr)
+							a_result.append_code (c)
+							i := pr.item
+						end
+					end
+				else
+					if c <= 0x7F then
+						a_result.append_code (c)
+					else
+						if a_result_is_string_32 then
+							a_result.append_code (c)
+						else
+								-- Keep the percent encoded char for non string 32.
+							append_percent_encoded_character_code_to (c, a_result)
+						end
+					end
+				end
+				i := i + 1
+			end
+		end
+
+feature {NONE} -- Implementation: decoding
+
+	next_percent_decoded_character_code (v: READABLE_STRING_GENERAL; a_position: CELL [INTEGER]): NATURAL_32
+			-- Character decoded from string `v' starting from index `a_position.item'
+			-- note: it also updates `a_position.item' to indicate the new index position.
+		require
+			valid_start: a_position.item <= v.count
+			is_percent_char: v.code (a_position.item) = 37 -- 37 '%%'
+		local
+			c: NATURAL_32
+			i, n: INTEGER
+			not_a_digit: BOOLEAN
+			ascii_pos: NATURAL_32
+			ival: NATURAL_32
+			pos: INTEGER
+			c_is_digit: BOOLEAN
+		do
+				--| pos is index in stream of escape character ('%')
+			pos := a_position.item
+			c := v.code (pos + 1)
+			if c = 85 or c = 117 then -- 117 'u'  85 'U'
+					-- NOTE: this is not a standard, but it can occur, so use this for decoding only
+					-- An escaped Unicode (ucs2) value, from ECMA scripts
+					--   has the form: %u<n> where <n> is the UCS value
+					--   of the character (two byte integer, one to 4 chars
+					--   after escape sequence).
+					-- See: http://en.wikipedia.org/wiki/Percent-encoding#Non-standard_implementations
+					-- UTF-8 result can be 1 to 4 characters.
+				from
+					i := pos + 2
+					n := v.count
+				until
+					(i > n) or not_a_digit
+				loop
+					c := v.code (i)
+					c_is_digit := (48 <= c and c <= 57) -- DIGIT: 0 .. 9
+					if
+						   c_is_digit
+						or (97 <= c and c <= 102)	-- ALPHA: a..f
+						or (65 <= c and c <= 70)	-- ALPHA: A..F
+					then
+						ival := ival * 16
+						if c_is_digit then
+							ival := ival + (c - 48) -- 48 '0'
+						else
+							if c > 70 then -- a..f
+								ival := ival + (c - 97) + 10 -- 97 'a'
+							else -- A..F
+								ival := ival + (c - 65) + 10 -- 65 'A'
+							end
+						end
+						i := i + 1
+					else
+						not_a_digit := True
+						i := i - 1
+					end
+				end
+				a_position.replace (i)
+				Result := ival
+			else
+					-- ASCII char?
+				ascii_pos := hexadecimal_string_to_natural_32 (v.substring (pos + 1, pos + 2))
+				Result := ascii_pos
+				a_position.replace (pos + 2)
+			end
+		end
+
+	next_percent_decoded_unicode_character_code (v: READABLE_STRING_GENERAL; a_position: CELL [INTEGER]): NATURAL_32
+			-- Next decoded character from `v' at position `a_position.item'
+			-- note: it also updates `a_position' to indicate the new index position.
+		require
+			valid_start: a_position.item <= v.count
+			is_percent_char: v.code (a_position.item) = 37 -- 37 '%%'
+		local
+			n, j: INTEGER
+			c: NATURAL_32
+			c1, c2, c3, c4: NATURAL_32
+			pr: CELL [INTEGER]
+		do
+			create pr.put (a_position.item)
+			c1 := next_percent_decoded_character_code (v, pr)
+
+			j := pr.item
+			n := v.count
+
+			Result := c1
+			a_position.replace (j)
+
+			if c1 <= 0x7F then
+					-- 0xxxxxxx
+				Result := c1
+			elseif c1 <= 0xDF then
+					-- 110xxxxx 10xxxxxx
+				if j + 2 <= n then
+					c := v.code (j + 1)
+					if c = 37 then -- 37 '%%'
+						pr.replace (j + 1)
+						c2 := next_percent_decoded_character_code (v, pr)
+						j := pr.item
+						Result := (
+									((c1 & 0x1F) |<< 6) |
+									( c2 & 0x3F       )
+								)
+						a_position.replace (j)
+					else
+						-- Do not try to decode
+					end
+				end
+			elseif c1 <= 0xEF then
+					-- 1110xxxx 10xxxxxx 10xxxxxx
+				if j + 2 <= n then
+					c := v.code (j + 1)
+					if c = 37 then -- 37 '%%'
+						pr.replace (j + 1)
+						c2 := next_percent_decoded_character_code (v, pr)
+						j := pr.item
+						if j + 2 <= n then
+							c := v.code (j + 1)
+							if c = 37 then -- 37 '%%'
+								pr.replace (j + 1)
+								c3 := next_percent_decoded_character_code (v, pr)
+								j := pr.item
+
+								Result := (
+										((c1 & 0xF)  |<< 12) |
+										((c2 & 0x3F) |<<  6) |
+										( c3 & 0x3F        )
+									)
+								a_position.replace (j)
+							else
+								-- Do not try to decode
+							end
+						end
+					else
+						-- Do not try to decode
+					end
+				end
+			elseif c1 <= 0xF7 then
+					-- 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+
+				if j + 2 <= n then
+					c := v.code (j + 1)
+					if c = 37 then -- 37 '%%'
+						pr.replace (j + 1)
+						c2 := next_percent_decoded_character_code (v, pr)
+						j := pr.item
+						if j + 2 <= n then
+							c := v.code (j + 1)
+							if c = 37 then -- 37 '%%'
+								pr.replace (j + 1)
+								c3 := next_percent_decoded_character_code (v, pr)
+								j := pr.item
+								if j + 2 <= n then
+									c := v.code (j + 1)
+									if c = 37 then -- 37 '%%'
+										pr.replace (j + 1)
+										c4 := next_percent_decoded_character_code (v, pr)
+										j := pr.item
+
+										a_position.replace (j)
+
+										Result := (
+												((c1 & 0x7)  |<< 18 ) |
+												((c2 & 0x3F) |<< 12) |
+												((c3 & 0x3F) |<<  6) |
+												( c4 & 0x3F        )
+											)
+									else
+										-- Do not try to decode
+									end
+								end
+							else
+								-- Do not try to decode
+							end
+						end
+					else
+						-- Do not try to decode
+					end
+				end
+			else
+				Result := c1
+			end
+		end
+
+feature -- RFC and characters
+
+	is_hexa_decimal_character (c: CHARACTER_32): BOOLEAN
+			-- Is hexadecimal character ?
+		do
+			Result :=  ('a' <= c and c <= 'f') or ('A' <= c and c <= 'F')	-- HEXA
+					or ('0' <= c and c <= '9') 								-- DIGIT
+		end
+
+	is_alpha_or_digit_character (c: CHARACTER_32): BOOLEAN
+			-- Is ALPHA or DIGIT character ?
+		do
+			Result :=  ('a' <= c and c <= 'z') or ('A' <= c and c <= 'Z')	-- ALPHA
+					or ('0' <= c and c <= '9') 								-- DIGIT
+		end
+
+	is_alpha_character (c: CHARACTER_32): BOOLEAN
+			-- Is ALPHA character ?
+		do
+			Result := ('a' <= c and c <= 'z') or ('A' <= c and c <= 'Z')
+		end
+
+	is_digit_character (c: CHARACTER_32): BOOLEAN
+			-- Is DIGIT character ?
+		do
+			Result := ('0' <= c and c <= '9')
+		end
+
+	is_unreserved_character (c: CHARACTER_32): BOOLEAN
+			-- unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+		do
+			if
+				   ('a' <= c and c <= 'z')	-- ALPHA
+				or ('A' <= c and c <= 'Z')	-- ALPHA
+				or ('0' <= c and c <= '9') 	-- DIGIT
+			then
+				Result := True
+			else
+				inspect c
+				when '-', '_', '.', '~' then -- unreserved
+					Result := True
+				else
+				end
+			end
+		end
+
+	is_reserved_character (c: CHARACTER_32): BOOLEAN
+			-- reserved    = gen-delims / sub-delims
+		do
+			Result := is_gen_delims_character (c) or is_sub_delims_character (c)
+		end
+
+	is_gen_delims_character (c: CHARACTER_32): BOOLEAN
+			-- gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"	
+		do
+			inspect c
+			when ':' , '/', '?' , '#' , '[' , ']' , '@' then
+				Result := True
+			else
+			end
+		end
+
+	is_sub_delims_character (c: CHARACTER_32): BOOLEAN
+			-- sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
+            --				   / "*" / "+" / "," / ";" / "="
+		do
+			inspect c
+			when '!' , '$' , '&' , '%'' , '(' , ')' , '*' , '+' , ',' , ';' , '=' then -- sub-delims
+				Result := True
+			else
+			end
+		end
+
+feature {NONE} -- Implementation
+
+ 	hex_digit: SPECIAL [NATURAL_32]
+ 			-- Hexadecimal digits.
+ 		once
+ 			create Result.make_filled (0, 16)
+ 			Result [0] := {NATURAL_32} 48 -- 48 '0'
+ 			Result [1] := {NATURAL_32} 49 -- 49 '1'
+ 			Result [2] := {NATURAL_32} 50 -- 50 '2'
+ 			Result [3] := {NATURAL_32} 51 -- 51 '3'
+ 			Result [4] := {NATURAL_32} 52 -- 52 '4'
+ 			Result [5] := {NATURAL_32} 53 -- 53 '5'
+ 			Result [6] := {NATURAL_32} 54 -- 54 '6'
+ 			Result [7] := {NATURAL_32} 55 -- 55 '7'
+ 			Result [8] := {NATURAL_32} 56 -- 56 '8'
+ 			Result [9] := {NATURAL_32} 57 -- 57 '9'
+ 			Result [10] := {NATURAL_32} 65 -- 65 'A'
+ 			Result [11] := {NATURAL_32} 66 -- 66 'B'
+ 			Result [12] := {NATURAL_32} 67 -- 67 'C'
+ 			Result [13] := {NATURAL_32} 68 -- 68 'D'
+ 			Result [14] := {NATURAL_32} 69 -- 69 'E'
+ 			Result [15] := {NATURAL_32} 70 -- 70 'F'
+ 		end
+
+	is_hexa_decimal (a_string: READABLE_STRING_GENERAL): BOOLEAN
+			-- Is `a_string' a valid hexadecimal sequence?
+		local
+			l_convertor: like ctoi_convertor
+		do
+			l_convertor := ctoi_convertor
+			l_convertor.parse_string_with_type (a_string, {NUMERIC_INFORMATION}.type_natural_32)
+			Result := l_convertor.is_integral_integer
+		end
+
+	hexadecimal_string_to_natural_32 (a_hex_string: READABLE_STRING_GENERAL): NATURAL_32
+			-- Convert hexadecimal value `a_hex_string' to its corresponding NATURAL_32 value.
+		require
+			is_hexa: is_hexa_decimal (a_hex_string)
+		local
+			l_convertor: like ctoi_convertor
+		do
+			l_convertor := ctoi_convertor
+			l_convertor.parse_string_with_type (a_hex_string, {NUMERIC_INFORMATION}.type_no_limitation)
+			Result := l_convertor.parsed_natural_32
+		end
+
+	ctoi_convertor: HEXADECIMAL_STRING_TO_INTEGER_CONVERTER
+			-- Converter used to convert string to integer or natural.
+		once
+			create Result.make
+			Result.set_leading_separators_acceptable (False)
+			Result.set_trailing_separators_acceptable (False)
+		ensure
+			ctoi_convertor_not_void: Result /= Void
+		end
+
+note
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end
diff --git a/library/network/http_client/src/spec/libcurl/libcurl_http_client_request.e b/library/network/http_client/src/spec/libcurl/libcurl_http_client_request.e
index c46c8e9b..1ad66b1d 100644
--- a/library/network/http_client/src/spec/libcurl/libcurl_http_client_request.e
+++ b/library/network/http_client/src/spec/libcurl/libcurl_http_client_request.e
@@ -82,9 +82,6 @@ feature -- Execution
 
 				--| URL
 				l_url := url
-				if ctx /= Void then
-					append_parameters_to_url (ctx.query_parameters, l_url)
-				end
 
 				if session.is_header_sent_verbose then
 					io.error.put_string ("> Sending:%N")
@@ -171,7 +168,7 @@ feature -- Execution
 							then
 								if l_ct.starts_with ("application/x-www-form-urlencoded") then
 									-- Content-Type is already application/x-www-form-urlencoded
-									l_upload_data := ctx.form_parameters_to_url_encoded_string
+									l_upload_data := ctx.form_parameters_to_x_www_form_url_encoded_string
 								elseif l_ct.starts_with ("multipart/form-data") then
 									l_use_curl_form := True
 								else
@@ -179,7 +176,7 @@ feature -- Execution
 									l_use_curl_form := True
 								end
 							else
-								l_upload_data := ctx.form_parameters_to_url_encoded_string
+								l_upload_data := ctx.form_parameters_to_x_www_form_url_encoded_string
 							end
 						else
 							l_use_curl_form := True
@@ -199,6 +196,14 @@ feature -- Execution
 									)
 								l_form_data.forth
 							end
+							if l_upload_filename /= Void then
+								curl.formadd_string_string (l_form, l_last,
+										{CURL_FORM_CONSTANTS}.curlform_copyname, "file",
+										{CURL_FORM_CONSTANTS}.curlform_file, l_upload_filename,
+										{CURL_FORM_CONSTANTS}.curlform_end
+									)
+									l_upload_filename := Void
+							end
 							l_last.release_item
 							curl_easy.setopt_form (curl_handle, {CURL_OPT_CONSTANTS}.curlopt_httppost, l_form)
 						end
diff --git a/library/network/http_client/src/spec/libcurl/libcurl_http_client_session.e b/library/network/http_client/src/spec/libcurl/libcurl_http_client_session.e
index af8e4572..a17f2204 100644
--- a/library/network/http_client/src/spec/libcurl/libcurl_http_client_session.e
+++ b/library/network/http_client/src/spec/libcurl/libcurl_http_client_session.e
@@ -41,7 +41,7 @@ feature -- Custom
 		local
 			req: HTTP_CLIENT_REQUEST
 		do
-			create {LIBCURL_HTTP_CLIENT_REQUEST} req.make (base_url + a_path, a_method, Current, ctx)
+			create {LIBCURL_HTTP_CLIENT_REQUEST} req.make (url (a_path, ctx), a_method, Current, ctx)
 			Result := req.response
 		end
 
@@ -154,7 +154,7 @@ feature {NONE} -- Implementation
 				end
 			end
 
-			create {LIBCURL_HTTP_CLIENT_REQUEST} req.make (base_url + a_path, a_method, Current, ctx)
+			create {LIBCURL_HTTP_CLIENT_REQUEST} req.make (url (a_path, ctx), a_method, Current, ctx)
 			Result := req.response
 
 			if f /= Void then
@@ -176,7 +176,7 @@ feature {LIBCURL_HTTP_CLIENT_REQUEST} -- Curl implementation
 
 
 ;note
-	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/src/spec/net/net_http_client_request.e b/library/network/http_client/src/spec/net/net_http_client_request.e
index 8c9b1776..5808b031 100644
--- a/library/network/http_client/src/spec/net/net_http_client_request.e
+++ b/library/network/http_client/src/spec/net/net_http_client_request.e
@@ -156,7 +156,7 @@ feature -- Access
 					end
 
 					create l_request_uri.make_from_string (l_uri.path)
-					if attached l_uri.query as l_query then
+					if attached l_uri.query as l_query and then not l_query.is_empty then
 						l_request_uri.append_character ('?')
 						l_request_uri.append (l_query)
 					end
@@ -198,7 +198,7 @@ feature -- Access
 									attached headers.item ("Content-Type") as l_ct
 								then
 									if l_ct.starts_with ("application/x-www-form-urlencoded") then
-										l_upload_data := ctx.form_parameters_to_url_encoded_string
+										l_upload_data := ctx.form_parameters_to_x_www_form_url_encoded_string
 									elseif l_ct.starts_with ("multipart/form-data") then
 											-- create form using multipart/form-data encoding
 										l_boundary := new_mime_boundary (l_form_data)
@@ -208,12 +208,12 @@ feature -- Access
 											-- not supported !
 											-- Send as form-urlencoded
 										headers.extend ("application/x-www-form-urlencoded", "Content-Type")
-										l_upload_data := ctx.form_parameters_to_url_encoded_string
+										l_upload_data := ctx.form_parameters_to_x_www_form_url_encoded_string
 									end
 								else
 										-- Send as form-urlencoded
 									headers.extend ("application/x-www-form-urlencoded", "Content-Type")
-									l_upload_data := ctx.form_parameters_to_url_encoded_string
+									l_upload_data := ctx.form_parameters_to_x_www_form_url_encoded_string
 								end
 								headers.extend (l_upload_data.count.out, "Content-Length")
 								if l_is_chunked_transfer_encoding then
@@ -246,7 +246,7 @@ feature -- Access
 						elseif l_upload_filename /= Void then
 							check ctx.has_upload_filename end
 							create l_upload_file.make_with_name (l_upload_filename)
-							if l_upload_file.exists and then l_upload_file.readable then
+							if l_upload_file.exists and then l_upload_file.is_access_readable then
 								if not l_is_chunked_transfer_encoding then
 									headers.extend (l_upload_file.count.out, "Content-Length")
 								end
@@ -495,6 +495,7 @@ feature {NONE} -- Helpers
 			across
 				a_form_parameters as ic
 			loop
+				Result.append ("--")
 				Result.append (a_mime_boundary)
 				Result.append (http_end_of_header_line)
 				Result.append ("Content-Disposition: form-data; name=")
@@ -519,7 +520,7 @@ feature {NONE} -- Helpers
 				else
 					l_mime_type := "application/octet-stream"
 				end
-
+				Result.append ("--")
 				Result.append (a_mime_boundary)
 				Result.append (http_end_of_header_line)
 				Result.append ("Content-Disposition: form-data; name=%"")
@@ -542,6 +543,7 @@ feature {NONE} -- Helpers
 				end
 				Result.append (http_end_of_header_line)
 			end
+			Result.append ("--")
 			Result.append (a_mime_boundary)
 			Result.append ("--") --| end			
 		end
@@ -907,7 +909,7 @@ feature {NONE} -- Helpers
 			create ran.set_seed (i) -- FIXME: use a real random seed.
 			ran.start
 			ran.forth
-			n := (20 * ran.real_item).truncated_to_integer
+			n := (10 * ran.real_item).truncated_to_integer
 			create Result.make_filled ('-', 3 + n)
 			s := "_1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 			from
diff --git a/library/network/http_client/src/spec/net/net_http_client_session.e b/library/network/http_client/src/spec/net/net_http_client_session.e
index e3269fc1..d414d66c 100644
--- a/library/network/http_client/src/spec/net/net_http_client_session.e
+++ b/library/network/http_client/src/spec/net/net_http_client_session.e
@@ -67,7 +67,7 @@ feature -- Custom
 		local
 			req: HTTP_CLIENT_REQUEST
 		do
-			create {NET_HTTP_CLIENT_REQUEST} req.make (base_url + a_path, a_method, Current, ctx)
+			create {NET_HTTP_CLIENT_REQUEST} req.make (url (a_path, ctx), a_method, Current, ctx)
 			Result := req.response
 		end
 
@@ -167,12 +167,12 @@ feature {NONE} -- Implementation
 				end
 			end
 
-			create {NET_HTTP_CLIENT_REQUEST} req.make (base_url + a_path, a_method, Current, ctx)
+			create {NET_HTTP_CLIENT_REQUEST} req.make (url (a_path, ctx), a_method, Current, ctx)
 			Result := req.response
 		end
 
 note
-	copyright: "2011-2016, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/src/spec/null/null_http_client_session.e b/library/network/http_client/src/spec/null/null_http_client_session.e
index bf5b20ea..1ceeeab5 100644
--- a/library/network/http_client/src/spec/null/null_http_client_session.e
+++ b/library/network/http_client/src/spec/null/null_http_client_session.e
@@ -25,7 +25,7 @@ feature -- Custom
 
 	custom (a_method: READABLE_STRING_8; a_path: READABLE_STRING_8; ctx: detachable HTTP_CLIENT_REQUEST_CONTEXT): HTTP_CLIENT_RESPONSE
 		do
-			create Result.make (base_url + a_path)
+			create Result.make (url (a_path, ctx))
 		end
 
 	custom_with_upload_data (a_method: READABLE_STRING_8; a_path: READABLE_STRING_8; a_ctx: detachable HTTP_CLIENT_REQUEST_CONTEXT; data: READABLE_STRING_8): HTTP_CLIENT_RESPONSE
@@ -98,7 +98,7 @@ feature -- Status report
 			-- Is interface usable?
 
 note
-	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/network/http_client/tests/test_libcurl_with_web.e b/library/network/http_client/tests/test_libcurl_with_web.e
index 52c6fc23..69ad2337 100644
--- a/library/network/http_client/tests/test_libcurl_with_web.e
+++ b/library/network/http_client/tests/test_libcurl_with_web.e
@@ -34,6 +34,11 @@ feature -- Tests
 			test_post_with_form_data
 		end
 
+	libcurl_test_post_with_uncommon_form_data
+		do
+			test_post_with_uncommon_form_data
+		end
+
 	libcurl_test_post_with_file
 		do
 			test_post_with_file
diff --git a/library/network/http_client/tests/test_net_with_web.e b/library/network/http_client/tests/test_net_with_web.e
index 94ca734b..6a1a112c 100644
--- a/library/network/http_client/tests/test_net_with_web.e
+++ b/library/network/http_client/tests/test_net_with_web.e
@@ -34,6 +34,11 @@ feature -- Tests
 			test_post_with_form_data
 		end
 
+	net_test_post_with_uncommon_form_data
+		do
+			test_post_with_uncommon_form_data
+		end
+
 	net_test_post_with_file
 		do
 			test_post_with_file
@@ -69,4 +74,9 @@ feature -- Tests
 			test_post_with_file_using_chunked_transfer_encoding
 		end
 
+	net_test_get_with_query_parameters
+		do
+			test_get_with_query_parameters
+		end
+
 end
diff --git a/library/network/http_client/tests/test_with_web_i.e b/library/network/http_client/tests/test_with_web_i.e
index 3f3411a1..56a1604a 100644
--- a/library/network/http_client/tests/test_with_web_i.e
+++ b/library/network/http_client/tests/test_with_web_i.e
@@ -1,4 +1,4 @@
-note
+note
 	description: "[
 		Eiffel tests that can be executed by testing tool.
 	]"
@@ -21,7 +21,10 @@ feature -- Initialization
 	on_prepare
 		do
 			Precursor
-			global_requestbin_path := new_requestbin_path
+			global_requestbin_path := "/s0jkhhs0"
+			if global_requestbin_path = Void then
+				global_requestbin_path := new_requestbin_path
+			end
 		end
 
 feature -- Factory
@@ -49,6 +52,9 @@ feature -- Requestbin
 					i := l_content.substring_index ("%"name%":", 1)
 					if i > 0 then
 						j := l_content.index_of (',', i + 1)
+						if j = 0 then
+							j := l_content.index_of ('}', i + 1)
+						end
 						if j > 0 then
 							Result := l_content.substring (i + 7, j - 1)
 							Result.adjust
@@ -61,6 +67,7 @@ feature -- Requestbin
 							if not Result.starts_with ("/") then
 								Result.prepend_character ('/')
 							end
+							print ("new_requestbin_path => http://requestb.in" + Result + "?inspect%N")
 						end
 					end
 				end
@@ -108,8 +115,55 @@ feature -- Factory
 					-- check requestbin to ensure the form parameters are correctly received
 				sess := new_session ("http://requestb.in")
 				create l_ctx.make
-				l_ctx.form_parameters.extend ("First Value", "First Key")
-				l_ctx.form_parameters.extend ("Second Value", "Second Key")
+				l_ctx.add_form_parameter ("First Key", "First Value")
+				l_ctx.add_form_parameter ("Second Key", "Second Value")
+				l_ctx.add_form_parameter ("unicode", {STRING_32} "Hello / 你好 !")
+				l_ctx.add_form_parameter ({STRING_32} "Field 你好 !", "How are you?")
+				create h.make_empty
+				if
+					attached sess.post (requestbin_path, l_ctx, "") as res and then
+					attached res.headers as hds
+				then
+					across
+						hds as c
+					loop
+						h.append (c.item.name + ": " + c.item.value + "%R%N")
+					end
+				end
+				print (h)
+			else
+				assert ("Has requestbin path", False)
+			end
+		end
+
+	test_post_with_uncommon_form_data
+		local
+			sess: HTTP_CLIENT_SESSION
+			h: STRING_8
+			l_ctx: HTTP_CLIENT_REQUEST_CONTEXT
+		do
+			if attached global_requestbin_path as requestbin_path then
+
+					-- POST REQUEST WITH FORM DATA
+					-- check requestbin to ensure the form parameters are correctly received
+				sess := new_session ("http://requestb.in")
+				create l_ctx.make
+
+				l_ctx.add_form_parameter ("title", "Eiffel World!") -- space and !
+				l_ctx.add_form_parameter ("path", "foo/bar") -- slash
+				l_ctx.add_form_parameter ("unreserved", ":!@[]{}()*") -- ...
+				l_ctx.add_form_parameter ("reserved", "+=?&_#_") -- ...
+				l_ctx.add_form_parameter ("a=b", "a=b") -- equal sign
+				l_ctx.add_form_parameter ("test", "!$&'()*") --
+				l_ctx.add_form_parameter ("lst[a][b]", "[123][456]") -- brackets
+				l_ctx.add_form_parameter ("pos{1,2}", "loc{a,b}") -- curly brackets
+				l_ctx.add_form_parameter ("?foo", "?bar") -- question mark
+				l_ctx.add_form_parameter ("?", "?") -- question mark
+				l_ctx.add_form_parameter ("&bar", "&bar") -- ampersand
+				l_ctx.add_form_parameter ("&", "&") -- ampersand
+
+				assert ("form data well generated", l_ctx.form_parameters_to_x_www_form_url_encoded_string.same_string ("title=Eiffel+World!&path=foo%%2Fbar&unreserved=%%3A!%%40%%5B%%5D%%7B%%7D()*&reserved=%%2B%%3D%%3F%%26_%%23_&a%%3Db=a%%3Db&test=!%%24%%26'()*&lst%%5Ba%%5D%%5Bb%%5D=%%5B123%%5D%%5B456%%5D&pos%%7B1%%2C2%%7D=loc%%7Ba%%2Cb%%7D&%%3Ffoo=%%3Fbar&%%3F=%%3F&%%26bar=%%26bar&%%26=%%26"))
+
 				create h.make_empty
 				if
 					attached sess.post (requestbin_path, l_ctx, "") as res and then
@@ -143,7 +197,7 @@ feature -- Factory
 				l_ctx.set_upload_filename ("test.txt")
 				create h.make_empty
 				if
-					attached sess.post (requestbin_path, l_ctx, "") as res and then
+					attached sess.post (requestbin_path, l_ctx, Void) as res and then
 					attached res.headers as hds
 				then
 					across
@@ -202,7 +256,7 @@ feature -- Factory
 					-- set filename to a local file
 				sess := new_session ("http://requestb.in")
 				create l_ctx.make
-				l_ctx.set_upload_data ("This is a test for http client.%N")
+				l_ctx.set_upload_data ("name=This is a test for http client.%N")
 				create h.make_empty
 				if
 					attached sess.put (requestbin_path, l_ctx, Void) as res and then
@@ -232,10 +286,12 @@ feature -- Factory
 					-- check requestbin to ensure the file and form parameters are correctly received
 					-- set filename to a local file
 				sess := new_session ("http://requestb.in")
+--				sess := new_session ("http://localhost:9090")
 				create l_ctx.make
-				l_ctx.set_upload_filename ("logo.jpg")
-				l_ctx.form_parameters.extend ("First Value", "First Key")
-				l_ctx.form_parameters.extend ("Second Value", "Second Key")
+--				l_ctx.set_upload_filename ("logo.jpg")
+				l_ctx.set_upload_filename ("test.txt")
+				l_ctx.add_form_parameter ("First", "Value")
+				l_ctx.add_form_parameter ("Second", "and last value")
 				create h.make_empty
 				if
 					attached sess.post (requestbin_path, l_ctx, Void) as res and then
@@ -297,6 +353,7 @@ feature -- Factory
 				sess := new_session ("http://google.com")
 				create h.make_empty
 				if attached sess.get ("/", Void) as res and then attached res.headers as hds then
+					assert("was redirected", res.redirections_count > 0)
 					across
 						hds as c
 					loop
@@ -328,6 +385,53 @@ feature -- Factory
 			end
 		end
 
+	test_get_with_query_parameters
+		local
+			sess: HTTP_CLIENT_SESSION
+			h: STRING_8
+			l_ctx: HTTP_CLIENT_REQUEST_CONTEXT
+			q: STRING
+		do
+			if attached global_requestbin_path as requestbin_path then
+
+					-- GET REQUEST WITH A FILE AND FORM DATA
+					-- check requestbin to ensure the file and form parameters are correctly received
+					-- set filename to a local file
+				sess := new_session ("http://requestb.in")
+				create l_ctx.make
+				l_ctx.add_query_parameter ("?", "?first&arg")
+				l_ctx.add_query_parameter ("title", "Eiffel World!")
+				l_ctx.add_query_parameter ("path", "foo/bar")
+				l_ctx.add_query_parameter ("reserved", "+=&?")
+				l_ctx.add_query_parameter ("unreserved", ":!@'()*")
+				l_ctx.add_query_parameter ("unsafe", "%"[]{}")
+				l_ctx.add_query_parameter ("test", "!$&'()*")
+				l_ctx.add_query_parameter ("a&b", "a&b")
+				l_ctx.add_query_parameter ("lst[a][b]", "[abc][123]")
+				l_ctx.add_query_parameter ("foo(a,b)", "bar(1,2)*pi")
+				create q.make_empty
+				l_ctx.append_query_parameters_to_url (q)
+				assert("query", q.same_string ("??=?first%%26arg&title=Eiffel+World!&path=foo/bar&reserved=%%2B=%%26?&unreserved=:!@'()*&unsafe=%%22%%5B%%5D%%7B%%7D&test=!$%%26'()*&a%%26b=a%%26b&lst%%5Ba%%5D%%5Bb%%5D=%%5Babc%%5D%%5B123%%5D&foo(a,b)=bar(1,2)*pi"))
+
+
+				create h.make_empty
+				if
+					attached sess.get (requestbin_path, l_ctx) as res and then
+					attached res.headers as hds
+				then
+					across
+						hds as c
+					loop
+						h.append (c.item.name + ": " + c.item.value + "%R%N")
+					end
+				end
+				print (h)
+			else
+				assert ("Has requestbin path", False)
+			end
+		end
+
+
 
 end
 
diff --git a/library/text/encoder/src/x_www_form_url_encoder.e b/library/text/encoder/src/x_www_form_url_encoder.e
new file mode 100644
index 00000000..1d91dfff
--- /dev/null
+++ b/library/text/encoder/src/x_www_form_url_encoder.e
@@ -0,0 +1,47 @@
+note
+	description: "Summary description for {X_WWW_FORM_URL_ENCODER}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	X_WWW_FORM_URL_ENCODER
+
+inherit
+	URL_ENCODER
+		redefine
+			append_percent_encoded_ascii_character_code_to
+		end
+
+feature {NONE} -- Implementation: character encoding
+
+	append_percent_encoded_ascii_character_code_to (a_code: NATURAL_32; a_result: STRING_GENERAL)
+			-- <Precursor>
+			-- Note: space is encoded with '+' for x-www-form-urlencoding.
+		do
+			inspect a_code
+			when
+				32 -- 32 ' '
+			then
+				a_result.append_code (43) -- 43 '+'
+			when
+				33, 39,		-- ! '
+				40, 41, 42 -- ( ) *
+			then
+				a_result.append_code (a_code) -- Keep slash
+			else
+				Precursor (a_code, a_result)
+			end
+		end
+
+note
+	copyright: "Copyright (c) 2011-2017, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end