Changed prefix from EWSGI_ to WGI_

Changed meta variable type to READABLE_STRING_32

library/server/ewsgi/examples/hello_world_with_response/src/hello_world.e

@@ -8,18 +8,18 @@ class
 	HELLO_WORLD
 
 inherit
-	EWSGI_RESPONSE_APPLICATION
+	WGI_RESPONSE_APPLICATION
 
-	DEFAULT_EWSGI_APPLICATION
+	DEFAULT_WGI_APPLICATION
 
 create
 	make_and_launch
 
 feature -- Response
 
-    response (request: EWSGI_REQUEST): EWSGI_RESPONSE
+    response (request: WGI_REQUEST): WGI_RESPONSE
         do
-        	if request.environment.path_info.starts_with ("/streaming/") then
+        	if request.path_info.starts_with ("/streaming/") then
         		Result := streaming_response (request)
         	else
 	            create Result.make
@@ -29,7 +29,7 @@ feature -- Response
         	end
         end
 
-    streaming_response (request: EWSGI_REQUEST): EWSGI_RESPONSE
+    streaming_response (request: WGI_REQUEST): WGI_RESPONSE
         do
 	        create {HELLO_WORLD_RESPONSE} Result.make
             Result.set_status (200)

library/server/ewsgi/examples/hello_world_with_response/src/hello_world_response.e

@@ -6,7 +6,7 @@ note
 class HELLO_WORLD_RESPONSE
 
 inherit
-    EWSGI_RESPONSE
+    WGI_RESPONSE
         redefine
             make,
             read_block