Added url routing for /files/... and /module/{modname}/files/...

Added CMS_HOOK_RESPONSE_ALTER to give a last chance to alter the response before rendering.
   This hook should not be used, when there are other alternative hook that answer the need, but this is proposed for now, as a way to alter response by adding css, js url, ...
Moved blog under official modules folder.
Cleaned theme of demo example project.
Renamed NODE_MODULE as CMS_NODE_MODULE.

modules/blog/handler/blog_user_handler.e

@@ -0,0 +1,148 @@
+note
+	description: "[
+			Request handler related to 
+				/blogs/user/{id}/ 
+				or /blogs/user/{id}/page/{page}. 
+				
+			Displays all posts of the given user
+		]"
+	author: "Dario B<>sch <daboesch@student.ethz.ch>"
+	date: "$Date: 2015-05-22 15:13:00 +0100 (lun., 18 mai 2015) $"
+	revision: "$Revision 96616$"
+
+class
+	BLOG_USER_HANDLER
+
+inherit
+	BLOG_HANDLER
+		redefine
+			do_get,
+			posts,
+			total_entries,
+			append_page_title_html_to,
+			base_path
+		end
+
+create
+	make
+
+feature -- Global Variables
+
+	user : detachable CMS_USER
+
+feature -- HTTP Methods
+
+	do_get (req: WSF_REQUEST; res: WSF_RESPONSE)
+			-- <Precursor>
+		local
+			l_error: NOT_FOUND_ERROR_CMS_RESPONSE
+		do
+			user := Void
+			if attached user_from_request (req) as l_user then
+				user := l_user
+					-- Output the results, similar as in the blog hanlder (but with other queries)
+				Precursor (req, res)
+			else
+					-- Throw a bad request error because the user is not valid
+				create l_error.make (req, res, api)
+				l_error.set_main_content ("<h1>Error</h1>User with id " + user_id_path_parameter (req).out + " doesn't exist!")
+				l_error.execute
+			end
+		end
+
+feature -- Query
+
+	user_valid (req: WSF_REQUEST) : BOOLEAN
+			-- Returns true if a valid user id is given and a user with this id exists,
+			-- otherwise returns false.
+		local
+			user_id: INTEGER_32
+		do
+			user_id := user_id_path_parameter (req)
+
+			if user_id <= 0 then
+					-- Given user id is not valid
+				Result := False
+			else
+					--Check if user with user_id exists
+				Result := api.user_api.user_by_id (user_id) /= Void
+			end
+		end
+
+	user_from_request (req: WSF_REQUEST): detachable CMS_USER
+			-- Eventual user with given id in the path of request `req'.
+		local
+			uid: like user_id_path_parameter
+		do
+			uid := user_id_path_parameter (req)
+			if uid > 0 then
+				Result := api.user_api.user_by_id (uid)
+			else
+					-- Missing or invalid user id.
+			end
+		end
+
+	user_id_path_parameter (req: WSF_REQUEST): INTEGER_32
+			-- User id from path /blogs/{user}.
+			-- Unsigned integer since negative ids are not allowed.
+			-- If no valid id can be read it returns -1
+		do
+			Result := -1
+			if attached {WSF_STRING} req.path_parameter ("user") as l_user_id then
+				if l_user_id.is_integer then
+					Result := l_user_id.integer_value
+				end
+			end
+		end
+
+	posts: LIST [CMS_BLOG]
+			-- Blog posts to display on given page.
+			-- Filters out the posts of the current user.
+		do
+			if attached user as l_user then
+				Result := blog_api.blogs_from_user_order_created_desc_limited (l_user, entries_per_page, entries_per_page * (page_number - 1))
+			else
+				create {ARRAYED_LIST [CMS_BLOG]} Result.make (0)
+			end
+		end
+
+	total_entries : NATURAL_32
+			-- Returns the number of total entries/posts of the current user
+		do
+			if attached user as l_user then
+				Result := blog_api.blogs_count_from_user (l_user).to_natural_32
+			else
+				Result := Precursor
+			end
+		end
+
+feature -- HTML Output
+
+	append_page_title_html_to (a_output: STRING)
+			-- Returns the title of the page as a html string. It shows the current page number and the name of the current user
+		do
+			a_output.append ("<h2>Posts from ")
+			if attached user as l_user then
+				a_output.append (l_user.name)
+			else
+				a_output.append ("unknown user")
+			end
+			if multiple_pages_needed then
+				a_output.append (" (Page " + page_number.out + " of " + pages_count.out + ")")
+					-- Get the posts from the current page (limited by entries per page)
+			end
+			a_output.append ("</h2>")
+		end
+
+	base_path : STRING
+			-- Path to page listing all blogs.
+			-- If user is logged in, include user id
+		do
+			if attached user as l_user then
+				Result := "/blogs/user/" + l_user.id.out
+			else
+				Result := precursor
+			end
+		end
+
+end