suppression de vieux articles
This commit is contained in:
Yann Esposito (Yogsototh)
parent
b9f8ebf2dc
commit
2c0bfbd5e8
8 changed files with 0 additions and 656 deletions
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@ -1,34 +0,0 @@
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-----
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# Custom
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kind: article
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menupriority: 1
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title: MVC explained
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multiTitle:
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fr: design naïf
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en: Naive design
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-----
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## The naive design ##
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Suppose you want to make a simple todo list application.
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In your mind you draw a simple scheme:
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|
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<pre>
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[ ] task 1 X
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[ ] task 2 X
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[ ] task 3 X
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</pre>
|
||||
|
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If you click on the box, then it should show the task is done.
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If you click on the cross, then it should delete the task from
|
||||
the list.
|
||||
|
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You then think:
|
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> "Whoa! That's easy!"
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You want to be able to use it as fast as possible
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and you also want to complexify this model later.
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For example, adding dates, contexts and projects...
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||||
|
|
@ -1,56 +0,0 @@
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|||
-----
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# Built-in
|
||||
filters_pre:
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- "bluecloth"
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||||
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||||
# Custom
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kind: article
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menupriority: 2
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title: MVC explained (Let's code it)
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multiTitle:
|
||||
fr: let's code it
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en: Let's code it
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||||
-----
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||||
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the purpose of this part is to code the webserver part of your
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application. Some really complete framework already exists for that.
|
||||
|
||||
newcorps
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||||
|
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## Let's code it ##
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You choose a programming language (for readability I choosen
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Ruby).
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|
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First you use a simple HTTP Server library (for simplicity
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I choosen webrick)
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Here an example of a very minimal HTTP Server. When it receives
|
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a GET request at the port number 2000 at the directory '/' it returns:
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<code class="html"><html>Content</html></code>
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Here is the code:
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<div>
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<code class="ruby" file="minimalHttpServer.rb">
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#!/usr/bin/env ruby
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require 'webrick'
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include WEBrick
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s = HTTPServer.new( :Port => 2000 )
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class HelloServlet < HTTPServlet::AbstractServlet
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def do_GET(req, res)
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res.body = '<html>Content</html>'
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res['Content-Type'] = "text/html"
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end
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end
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s.mount("/", HelloServlet)
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s.start </code>
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</div>
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You can try it yourself starting by downloading and starting the ruby program and clicking this [link (http://localhost:2000)](http://localhost:2000/) (You must start the server for this link to work).
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|
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I Believe what it does is mostly straightforward
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|
|
@ -1,105 +0,0 @@
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-----
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# Built-in
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filters_pre:
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- "bluecloth"
|
||||
|
||||
# Custom
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kind: article
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menupriority: 3
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title: MVC explained (first design cleaning)
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multiTitle:
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fr: first design cleaning
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en: first design cleaning
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-----
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## first design cleaning ##
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If you want your applications to
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generate strict XHTML 1.0 web pages you
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have to modify your application to put the content
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between an *header* and a *footer*.
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|
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Naturally, You write directly the header and footer
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in the source code of the application.
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|
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You also want to initialize with some tasks.
|
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And in order to prepare the future, you separate
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the server code from you todo list code.
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Then you write a specifical class for the two
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*features* of your application.
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Your new code will look like:
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<div>
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<code class="ruby">
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class Todo
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def content
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Print the content of the list
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...
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todo = new Todo
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HEADER="<... code HTML ...>"
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FOOTER="<... code HTML ...>"
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Class Server
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def do_GET
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return HEADER + (todo.content) + FOOTER
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server = new Server
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server.start # and for each GET request execute do_GET</code>
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</div>
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Here are the details of the modified code:
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<div>
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<code class="ruby" file="step0.rb">
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#!/usr/bin/env ruby
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require 'webrick'
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include WEBrick
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s = HTTPServer.new( :Port => 2000 )
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class Todo
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def initialize
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@todoList=['first task','second task']
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end
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def content
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res='<h1>Todo</h1><ul>'
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@todoList.each{|task| res<<='<li>'+task+'</li>'}
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res<<='</ul>'
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return res
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end
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end
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class Servlet
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# you write the common header and footer of all pages
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# directly in the source code
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@@Header='<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="fr" xml:lang="fr">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Todo Application</title>
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</head>
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<body><div id="content">'
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@@Footer='</div></body>'
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@@Todo=Todo.new
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def do_GET(req, res)
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res.body = @@Header + @@Todo.content + @@Footer
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res['Content-Type'] = "text/html"
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end
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end
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servlet=Servlet.new
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s.mount("/"){ |req,res| server.do_GET(req,res) }
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trap("INT"){ s.shutdown }
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s.start </code>
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</div>
|
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|
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For now your application isn't functionnal. But it's great,
|
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you can print your todo list. We just have to add content
|
||||
at runtime now.
|
||||
|
|
@ -1,133 +0,0 @@
|
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-----
|
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# Built-in
|
||||
filters_pre:
|
||||
- "bluecloth"
|
||||
|
||||
# Custom
|
||||
kind: article
|
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menupriority: 4
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||||
title: MVC explained (make it usable)
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multiTitle:
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fr: make it usable
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en: make it usable
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-----
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## Make it usable ##
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The app is almost usable. You only need to have a way to
|
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add new tasks and to delete them. Let's do it using
|
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|
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<div>
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<code class="html">
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http://localhost:2000/?newtask="new task text"
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http://localhost:2000/?deletetask=taskNumber </code>
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</div>
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It is not a so difficult part, you only need a little
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code in the `do_GET` function of server to call to correct
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Todo methods depending of the request.
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And of course code the correponding method in the Todo class.
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<div>
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<code class="ruby" file="naivetodolist.rb">
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#!/usr/bin/env ruby
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require 'webrick'
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# the Todo class is in an external file
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require 'todo.rb'
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include WEBrick
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s = HTTPServer.new( :Port => 2000 )
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class Servlet
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# you write the common header and footer of all pages
|
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# directly in the source code
|
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@@Header='<?xml version="1.0" encoding="utf-8"?>
|
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"
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lang="fr" xml:lang="fr">
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<head>
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<meta http-equiv="Content-Type"
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content="text/html; charset=UTF-8" />
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<title>Todo Application</title>
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</head>
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<body><div id="content">'
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@@Footer='</div></body>'
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def initialize()
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@todo=Todo.new
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end
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# implement the GET request
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def do_GET(req, res)
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if req.query['newtask']
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@todo.addTask(req.query['newtask'])
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elsif req.query['deletetask']
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@todo.deleteTask(req.query['deletetask'])
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end
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res.body = @@Header + @todo.content + @@Footer
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res['Content-Type'] = "text/html"
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end
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end
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servlet=Servlet.new
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s.mount_proc("/"){ |req,res| servlet.do_GET(req,res) }
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trap("INT"){ s.shutdown }
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s.start</code>
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</div>
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Where the TODO class is really simple and coded like this:
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<div>
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<code class="ruby" file="todo.rb">
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class Todo
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def initialize
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@todoList=['first task','second task']
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end
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def content
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res='<h1>Todo</h1><ul>';
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i=0
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@todoList.each do |task|
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res<<='<li>'+task+
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' <a href="?deletetask='+ i.to_s +
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'">done</a>'+'</li>'
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i+=1
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end
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res<<='</ul>
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<form name="input" action="#" metho="get">
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Task: <input type="text" name="newtask"/>
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</form>'
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return res
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end
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def addTask(task)
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@todoList<<=task
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end
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def deleteTask(taskNum)
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@todoList.delete_at(Integer(taskNum.to_s))
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end
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end</code>
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</div>
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Here is the results :
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Now we have separated the server and the todo list into
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two different files.
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The application's working within only 76 lines of code
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Now speak about the problems of this (working) implementation.
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What will occurs if you want to change from list to tables for
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example or more generally if we want to change the html structure?
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You'll have to modify the **Todo** class.
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This is why you should separate even more each concepts.
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|
|
@ -1,34 +0,0 @@
|
|||
-----
|
||||
|
||||
# Custom
|
||||
kind: article
|
||||
menupriority: 1
|
||||
title: MVC explained
|
||||
multiTitle:
|
||||
fr: design naïf
|
||||
en: Naive design
|
||||
|
||||
-----
|
||||
|
||||
## The naive design ##
|
||||
|
||||
Suppose you want to make a simple todo list application.
|
||||
In your mind you draw a simple scheme:
|
||||
|
||||
<pre>
|
||||
[ ] task 1 X
|
||||
[ ] task 2 X
|
||||
[ ] task 3 X
|
||||
</pre>
|
||||
|
||||
If you click on the box, then it should show the task is done.
|
||||
If you click on the cross, then it should delete the task from
|
||||
the list.
|
||||
|
||||
You then think:
|
||||
> "Whoa! That's easy!"
|
||||
|
||||
You want to be able to use it as fast as possible
|
||||
and you also want to complexify this model later.
|
||||
|
||||
For example, adding dates, contexts and projects...
|
||||
|
|
@ -1,56 +0,0 @@
|
|||
-----
|
||||
# Built-in
|
||||
filters_pre:
|
||||
- "bluecloth"
|
||||
|
||||
# Custom
|
||||
kind: article
|
||||
menupriority: 2
|
||||
title: MVC explained (Let's code it)
|
||||
multiTitle:
|
||||
fr: let's code it
|
||||
en: Let's code it
|
||||
|
||||
-----
|
||||
|
||||
the purpose of this part is to code the webserver part of your
|
||||
application. Some really complete framework already exists for that.
|
||||
|
||||
newcorps
|
||||
|
||||
## Let's code it ##
|
||||
|
||||
You choose a programming language (for readability I choosen
|
||||
Ruby).
|
||||
|
||||
First you use a simple HTTP Server library (for simplicity
|
||||
I choosen webrick)
|
||||
|
||||
Here an example of a very minimal HTTP Server. When it receives
|
||||
a GET request at the port number 2000 at the directory '/' it returns:
|
||||
|
||||
<code class="html"><html>Content</html></code>
|
||||
|
||||
Here is the code:
|
||||
|
||||
<div>
|
||||
<code class="ruby" file="minimalHttpServer.rb">
|
||||
#!/usr/bin/env ruby
|
||||
require 'webrick'
|
||||
include WEBrick
|
||||
s = HTTPServer.new( :Port => 2000 )
|
||||
|
||||
class HelloServlet < HTTPServlet::AbstractServlet
|
||||
def do_GET(req, res)
|
||||
res.body = '<html>Content</html>'
|
||||
res['Content-Type'] = "text/html"
|
||||
end
|
||||
end
|
||||
|
||||
s.mount("/", HelloServlet)
|
||||
s.start </code>
|
||||
</div>
|
||||
|
||||
You can try it yourself starting by downloading and starting the ruby program and clicking this [link (http://localhost:2000)](http://localhost:2000/) (You must start the server for this link to work).
|
||||
|
||||
I Believe what it does is mostly straightforward
|
||||
|
|
@ -1,105 +0,0 @@
|
|||
-----
|
||||
# Built-in
|
||||
filters_pre:
|
||||
- "bluecloth"
|
||||
|
||||
# Custom
|
||||
kind: article
|
||||
menupriority: 3
|
||||
title: MVC explained (first design cleaning)
|
||||
multiTitle:
|
||||
fr: first design cleaning
|
||||
en: first design cleaning
|
||||
|
||||
-----
|
||||
|
||||
## first design cleaning ##
|
||||
|
||||
If you want your applications to
|
||||
generate strict XHTML 1.0 web pages you
|
||||
have to modify your application to put the content
|
||||
between an *header* and a *footer*.
|
||||
|
||||
Naturally, You write directly the header and footer
|
||||
in the source code of the application.
|
||||
|
||||
You also want to initialize with some tasks.
|
||||
And in order to prepare the future, you separate
|
||||
the server code from you todo list code.
|
||||
Then you write a specifical class for the two
|
||||
*features* of your application.
|
||||
|
||||
Your new code will look like:
|
||||
|
||||
<div>
|
||||
<code class="ruby">
|
||||
class Todo
|
||||
def content
|
||||
Print the content of the list
|
||||
...
|
||||
|
||||
todo = new Todo
|
||||
HEADER="<... code HTML ...>"
|
||||
FOOTER="<... code HTML ...>"
|
||||
|
||||
Class Server
|
||||
def do_GET
|
||||
return HEADER + (todo.content) + FOOTER
|
||||
|
||||
server = new Server
|
||||
server.start # and for each GET request execute do_GET</code>
|
||||
</div>
|
||||
|
||||
Here are the details of the modified code:
|
||||
|
||||
<div>
|
||||
<code class="ruby" file="step0.rb">
|
||||
#!/usr/bin/env ruby
|
||||
|
||||
require 'webrick'
|
||||
include WEBrick
|
||||
|
||||
s = HTTPServer.new( :Port => 2000 )
|
||||
|
||||
class Todo
|
||||
def initialize
|
||||
@todoList=['first task','second task']
|
||||
end
|
||||
def content
|
||||
res='<h1>Todo</h1><ul>'
|
||||
@todoList.each{|task| res<<='<li>'+task+'</li>'}
|
||||
res<<='</ul>'
|
||||
return res
|
||||
end
|
||||
end
|
||||
|
||||
class Servlet
|
||||
|
||||
# you write the common header and footer of all pages
|
||||
# directly in the source code
|
||||
@@Header='<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" lang="fr" xml:lang="fr">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
||||
<title>Todo Application</title>
|
||||
</head>
|
||||
<body><div id="content">'
|
||||
@@Footer='</div></body>'
|
||||
@@Todo=Todo.new
|
||||
|
||||
def do_GET(req, res)
|
||||
res.body = @@Header + @@Todo.content + @@Footer
|
||||
res['Content-Type'] = "text/html"
|
||||
end
|
||||
end
|
||||
servlet=Servlet.new
|
||||
s.mount("/"){ |req,res| server.do_GET(req,res) }
|
||||
trap("INT"){ s.shutdown }
|
||||
s.start </code>
|
||||
</div>
|
||||
|
||||
For now your application isn't functionnal. But it's great,
|
||||
you can print your todo list. We just have to add content
|
||||
at runtime now.
|
||||
|
|
@ -1,133 +0,0 @@
|
|||
-----
|
||||
# Built-in
|
||||
filters_pre:
|
||||
- "bluecloth"
|
||||
|
||||
# Custom
|
||||
kind: article
|
||||
menupriority: 4
|
||||
title: MVC explained (make it usable)
|
||||
multiTitle:
|
||||
fr: make it usable
|
||||
en: make it usable
|
||||
|
||||
-----
|
||||
|
||||
## Make it usable ##
|
||||
|
||||
The app is almost usable. You only need to have a way to
|
||||
add new tasks and to delete them. Let's do it using
|
||||
|
||||
<div>
|
||||
<code class="html">
|
||||
http://localhost:2000/?newtask="new task text"
|
||||
http://localhost:2000/?deletetask=taskNumber </code>
|
||||
</div>
|
||||
|
||||
It is not a so difficult part, you only need a little
|
||||
code in the `do_GET` function of server to call to correct
|
||||
Todo methods depending of the request.
|
||||
|
||||
And of course code the correponding method in the Todo class.
|
||||
|
||||
<div>
|
||||
<code class="ruby" file="naivetodolist.rb">
|
||||
#!/usr/bin/env ruby
|
||||
|
||||
require 'webrick'
|
||||
# the Todo class is in an external file
|
||||
require 'todo.rb'
|
||||
include WEBrick
|
||||
|
||||
s = HTTPServer.new( :Port => 2000 )
|
||||
|
||||
class Servlet
|
||||
# you write the common header and footer of all pages
|
||||
# directly in the source code
|
||||
@@Header='<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
||||
<html xmlns="http://www.w3.org/1999/xhtml"
|
||||
lang="fr" xml:lang="fr">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type"
|
||||
content="text/html; charset=UTF-8" />
|
||||
<title>Todo Application</title>
|
||||
</head>
|
||||
<body><div id="content">'
|
||||
@@Footer='</div></body>'
|
||||
|
||||
def initialize()
|
||||
@todo=Todo.new
|
||||
end
|
||||
|
||||
# implement the GET request
|
||||
def do_GET(req, res)
|
||||
if req.query['newtask']
|
||||
@todo.addTask(req.query['newtask'])
|
||||
elsif req.query['deletetask']
|
||||
@todo.deleteTask(req.query['deletetask'])
|
||||
end
|
||||
res.body = @@Header + @todo.content + @@Footer
|
||||
res['Content-Type'] = "text/html"
|
||||
end
|
||||
end
|
||||
|
||||
servlet=Servlet.new
|
||||
s.mount_proc("/"){ |req,res| servlet.do_GET(req,res) }
|
||||
|
||||
trap("INT"){ s.shutdown }
|
||||
s.start</code>
|
||||
</div>
|
||||
|
||||
Where the TODO class is really simple and coded like this:
|
||||
|
||||
<div>
|
||||
|
||||
<code class="ruby" file="todo.rb">
|
||||
class Todo
|
||||
def initialize
|
||||
@todoList=['first task','second task']
|
||||
end
|
||||
def content
|
||||
res='<h1>Todo</h1><ul>';
|
||||
i=0
|
||||
@todoList.each do |task|
|
||||
res<<='<li>'+task+
|
||||
' <a href="?deletetask='+ i.to_s +
|
||||
'">done</a>'+'</li>'
|
||||
i+=1
|
||||
end
|
||||
res<<='</ul>
|
||||
<form name="input" action="#" metho="get">
|
||||
Task: <input type="text" name="newtask"/>
|
||||
</form>'
|
||||
return res
|
||||
end
|
||||
def addTask(task)
|
||||
@todoList<<=task
|
||||
end
|
||||
def deleteTask(taskNum)
|
||||
@todoList.delete_at(Integer(taskNum.to_s))
|
||||
end
|
||||
|
||||
end</code>
|
||||
</div>
|
||||
|
||||
Here is the results :
|
||||
|
||||
|
||||
|
||||
Now we have separated the server and the todo list into
|
||||
two different files.
|
||||
|
||||
The application's working within only 76 lines of code
|
||||
|
||||
Now speak about the problems of this (working) implementation.
|
||||
|
||||
What will occurs if you want to change from list to tables for
|
||||
example or more generally if we want to change the html structure?
|
||||
|
||||
You'll have to modify the **Todo** class.
|
||||
|
||||
This is why you should separate even more each concepts.
|
||||
Loading…
Reference in a new issue