diff --git a/library/server/ewsgi/src/implementation/in_memory/gw_in_memory_response.e b/library/server/ewsgi/src/implementation/in_memory/gw_in_memory_response.e
new file mode 100644
index 00000000..5cc4fdc2
--- /dev/null
+++ b/library/server/ewsgi/src/implementation/in_memory/gw_in_memory_response.e
@@ -0,0 +1,91 @@
+note
+	description: "Summary description for {GW_IN_MEMORY_RESPONSE}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	GW_IN_MEMORY_RESPONSE
+
+inherit
+	GW_RESPONSE
+		redefine
+			commit
+		end
+
+create {GW_APPLICATION}
+	make
+
+feature {NONE} -- Initialization
+
+	make
+		do
+			create header.make
+			create body.make (100)
+		end
+
+	header: GW_HEADER
+
+	body: STRING_8
+
+feature -- Status setting
+
+	set_status_code (c: INTEGER)
+			-- Set the status code of the response
+		do
+			header.put_status (c)
+		end
+
+feature -- Output operation
+
+	write_string (s: STRING)
+			-- Send the content of `s'
+		do
+			body.append (s)
+		end
+
+	write_file_content (fn: STRING)
+			-- Send the content of file `fn'
+		local
+			f: RAW_FILE
+		do
+			create f.make (fn)
+			if f.exists and then f.is_readable then
+				f.open_read
+				from
+				until
+					f.exhausted
+				loop
+					f.read_stream (1024)
+					write_string (f.last_string)
+				end
+				f.close
+			end
+		end
+
+	write_header_object (h: GW_HEADER)
+			-- Send `header' to `output'.
+		do
+			header := h
+		end
+
+feature {GW_APPLICATION} -- Commit
+
+	commit (a_output: GW_OUTPUT_STREAM)
+		do
+			header.send_to (a_output)
+			write_string (body)
+			Precursor (a_output)
+		end
+
+;note
+	copyright: "2011-2011, 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/server/ewsgi/src/implementation/in_memory/gw_in_memory_response_application.e b/library/server/ewsgi/src/implementation/in_memory/gw_in_memory_response_application.e
new file mode 100644
index 00000000..7f98b878
--- /dev/null
+++ b/library/server/ewsgi/src/implementation/in_memory/gw_in_memory_response_application.e
@@ -0,0 +1,53 @@
+note
+	description: "Summary description for {GW_IN_MEMORY_RESPONSE_APPLICATION}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	GW_IN_MEMORY_RESPONSE_APPLICATION
+
+inherit
+	GW_APPLICATION
+		redefine
+			process
+		end
+
+feature -- Access
+
+	request_count: INTEGER
+			-- Request count
+
+feature -- Execution
+
+	process (env: GW_ENVIRONMENT; a_input: GW_INPUT_STREAM; a_output: GW_OUTPUT_STREAM)
+			-- Process request with environment `env', and i/o streams `a_input' and `a_output'
+		do
+			request_count := request_count + 1
+			Precursor (env, a_input, a_output)
+		end
+
+feature -- Factory
+
+	new_request (env: GW_ENVIRONMENT; a_input: GW_INPUT_STREAM): GW_REQUEST
+		do
+			create {GW_REQUEST_IMP} Result.make (env, a_input)
+			Result.execution_variables.set_variable (request_count.out, "REQUEST_COUNT")
+		end
+
+	new_response (a_output: GW_OUTPUT_STREAM): GW_IN_MEMORY_RESPONSE
+		do
+			create {GW_IN_MEMORY_RESPONSE} Result.make
+		end
+
+note
+	copyright: "2011-2011, 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/server/ewsgi/src/response/gw_buffered_response.e b/library/server/ewsgi/src/response/gw_buffered_response.e
new file mode 100644
index 00000000..cd769a74
--- /dev/null
+++ b/library/server/ewsgi/src/response/gw_buffered_response.e
@@ -0,0 +1,129 @@
+note
+	description: "Summary description for {GW_BUFFERED_RESPONSE}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	GW_BUFFERED_RESPONSE
+
+inherit
+	GW_RESPONSE
+		redefine
+			commit
+		end
+
+create {GW_APPLICATION}
+	make
+
+feature {NONE} -- Initialization
+
+	make (a_output: like output; a_buffer_size: INTEGER)
+		do
+			output := a_output
+			buffer_capacity := a_buffer_size
+			create buffer.make (a_buffer_size)
+		end
+
+	output: GW_OUTPUT_STREAM
+
+	buffer: STRING_8
+
+	buffer_capacity: INTEGER
+
+	buffer_count: INTEGER
+
+feature -- Status setting
+
+	set_status_code (c: INTEGER)
+			-- Set the status code of the response
+		do
+			header.put_status (c)
+		end
+
+feature -- Output operation
+
+	write_string (s: STRING)
+			-- Send the content of `s'
+		local
+			buf: like buffer
+			len_b, len_s: INTEGER
+		do
+			buf := buffer
+			len_s := s.count
+			len_b := buffer_count
+			if len_b + len_s >= buffer_capacity then
+				flush_buffer
+				if len_s >= buffer_capacity then
+						-- replace buffer by `s'
+					buffer := s
+					buffer_count := len_s
+					flush_buffer
+						-- restore buffer with `buf'
+					buffer := buf
+				else
+					buf.append (s)
+					buffer_count := len_s
+				end
+			else
+				buf.append (s)
+				buffer_count := len_b + len_s
+			end
+		end
+
+	write_file_content (fn: STRING)
+			-- Send the content of file `fn'
+		local
+			f: RAW_FILE
+		do
+			create f.make (fn)
+			if f.exists and then f.is_readable then
+				f.open_read
+				from
+				until
+					f.exhausted
+				loop
+					f.read_stream (buffer_capacity)
+					write_string (f.last_string)
+				end
+				f.close
+			end
+		end
+
+	write_header_object (h: GW_HEADER)
+			-- Send `header' to `output'.
+		do
+			header := h
+		end
+
+feature {NONE} -- Implementation
+
+	flush_buffer
+		require
+			buffer_count_match_buffer: buffer_count = buffer.count
+		do
+			output.put_string (buffer)
+			buffer_count := 0
+		ensure
+			buffer_flushed: buffer_count = 0 and buffer.count = 0
+		end
+
+feature {GW_APPLICATION} -- Commit
+
+	commit (a_output: GW_OUTPUT_STREAM)
+		do
+			flush_buffer
+			Precursor (a_output)
+		end
+
+;note
+	copyright: "2011-2011, 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