Python Web编程 :10分钟创建简易博客
转自：http://blog.csdn.net/caleng/article/details/5712850一、web.py简介
web.py是一款轻量级的python web开发框架，简单、高效、学习成本低，特别适合作为python web开发的入门框架。官方站点：http://webpy.org/
二、web.py安装
1、下载：http://webpy.org/static/web.py-0.33.tar.gz
2、解压并进入web.py-0.33目录，安装：python setup.py install
三、创建简易博客
1、目录说明：主目录blog/，模板目录blog/templates
2、在数据库“test”中创建表“entries”
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[*]CREATETABLEentries(
[*]idINTAUTO_INCREMENT,
[*]titleTEXT,
[*]contentTEXT,
[*]posted_onDATETIME,
[*]primarykey(id)
[*]);
3、在主目录创建blog.py，blog/blog.py
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[*]#载入框架
[*]importweb
[*]#载入数据库操作model（稍后创建）
[*]importmodel
[*]#URL映射
[*]urls=(
[*]'/','Index',
[*]'/view/(/d+)','View',
[*]'/new','New',
[*]'/delete/(/d+)','Delete',
[*]'/edit/(/d+)','Edit',
[*]'/login','Login',
[*]'/logout','Logout',
[*])
[*]app=web.application(urls,globals())
[*]#模板公共变量
[*]t_globals={
[*]'datestr':web.datestr,
[*]'cookie':web.cookies,
[*]}
[*]#指定模板目录，并设定公共模板
[*]render=web.template.render('templates',base='base',globals=t_globals)
[*]#创建登录表单
[*]login=web.form.Form(
[*]web.form.Textbox('username'),
[*]web.form.Password('password'),
[*]web.form.Button('login')
[*])
[*]#首页类
[*]classIndex:
[*]defGET(self):
[*]login_form=login()
[*]posts=model.get_posts()
[*]returnrender.index(posts,login_form)
[*]defPOST(self):
[*]login_form=login()
[*]iflogin_form.validates():
[*]iflogin_form.d.username=='admin'/
[*]andlogin_form.d.password=='admin':
[*]web.setcookie('username',login_form.d.username)
[*]raiseweb.seeother('/')
[*]#查看文章类
[*]classView:
[*]defGET(self,id):
[*]post=model.get_post(int(id))
[*]returnrender.view(post)
[*]#新建文章类
[*]classNew:
[*]form=web.form.Form(
[*]web.form.Textbox('title',
[*]web.form.notnull,
[*]size=30,
[*]description='Posttitle:'),
[*]web.form.Textarea('content',
[*]web.form.notnull,
[*]rows=30,
[*]cols=80,
[*]description='Postcontent:'),
[*]web.form.Button('Postentry'),
[*])
[*]defGET(self):
[*]form=self.form()
[*]returnrender.new(form)
[*]defPOST(self):
[*]form=self.form()
[*]ifnotform.validates():
[*]returnrender.new(form)
[*]model.new_post(form.d.title,form.d.content)
[*]raiseweb.seeother('/')
[*]#删除文章类
[*]classDelete:
[*]defPOST(self,id):
[*]model.del_post(int(id))
[*]raiseweb.seeother('/')
[*]#编辑文章类
[*]classEdit:
[*]defGET(self,id):
[*]post=model.get_post(int(id))
[*]form=New.form()
[*]form.fill(post)
[*]returnrender.edit(post,form)
[*]defPOST(self,id):
[*]form=New.form()
[*]post=model.get_post(int(id))
[*]ifnotform.validates():
[*]returnrender.edit(post,form)
[*]model.update_post(int(id),form.d.title,form.d.content)
[*]raiseweb.seeother('/')
[*]#退出登录
[*]classLogout:
[*]defGET(self):
[*]web.setcookie('username','',expires=-1)
[*]raiseweb.seeother('/')
[*]#定义404错误显示内容
[*]defnotfound():
[*]returnweb.notfound("Sorry,thepageyouwerelookingforwasnotfound.")
[*]
[*]app.notfound=notfound
[*]#运行
[*]if__name__=='__main__':
[*]app.run()
4、在主目录创建model.py，blog/model.py
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[*]importweb
[*]importdatetime
[*]#数据库连接
[*]db=web.database(dbn='mysql',db='test',user='root',pw='123456')
[*]#获取所有文章
[*]defget_posts():
[*]returndb.select('entries',order='idDESC')
[*]
[*]#获取文章内容
[*]defget_post(id):
[*]try:
[*]returndb.select('entries',where='id=$id',vars=locals())
[*]exceptIndexError:
[*]returnNone
[*]#新建文章
[*]defnew_post(title,text):
[*]db.insert('entries',
[*]title=title,
[*]content=text,
[*]posted_on=datetime.datetime.utcnow())
[*]#删除文章
[*]defdel_post(id):
[*]db.delete('entries',where='id=$id',vars=locals())
[*]
[*]#修改文章
[*]defupdate_post(id,title,text):
[*]db.update('entries',
[*]where='id=$id',
[*]vars=locals(),
[*]title=title,
[*]content=text)
5、在模板目录依次创建：base.html、edit.html、index.html、new.html、view.html
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[*]<!--base.html-->
[*]$defwith(page)
[*]<html>
[*]<head>
[*]<title>MyBlog</title>
[*]<mce:style><!--
[*]#menu{
[*]width:200px;
[*]float:right;
[*]}
[*]
[*]--></mce:style><stylemce_bogus="1">#menu{
[*]width:200px;
[*]float:right;
[*]}
[*]</style>
[*]</head>
[*]
[*]<body>
[*]<ulid="menu">
[*]<li><ahref="/"mce_href="">Home</a></li>
[*]$ifcookie().get('username'):
[*]<li><ahref="/new"mce_href="new">NewPost</a></li>
[*]</ul>
[*]
[*]$:page
[*]</body>
[*]</html>
[*]
[*]<!--edit.html-->
[*]$defwith(post,form)
[*]<h1>Edit$form.d.title</h1>
[*]<formaction=""method="post">
[*]$:form.render()
[*]</form>
[*]<h2>Deletepost</h2>
[*]<formaction="/delete/$post.id"method="post">
[*]<inputtype="submit"value="Deletepost"/>
[*]</form>
[*]
[*]<!--index.html-->
[*]$defwith(posts,login_form)
[*]<h1>Blogposts</h1>
[*]$ifnotcookie().get('username'):
[*]<formaction=""method="post">
[*]$:login_form.render()
[*]</form>
[*]$else:
[*]Welcome$cookie().get('username')!<ahref="/logout"mce_href="logout">Logout</a>
[*]<ul>
[*]$forpostinposts:
[*]<li>
[*]<ahref="/view/$post.id"mce_href="view/$post.id">$post.title</a>
[*]on$post.posted_on
[*]$ifcookie().get('username'):
[*]<ahref="/edit/$post.id"mce_href="edit/$post.id">Edit</a>
[*]<ahref="/delete/$post.id"mce_href="delete/$post.id">Del</a>
[*]</li>
[*]</ul>
[*]
[*]<!--new.html-->
[*]$defwith(form)
[*]<h1>NewBlogPost</h1>
[*]<formaction=""method="post">
[*]$:form.render()
[*]</form>
[*]
[*]<!--view.html-->
[*]$defwith(post)
[*]<h1>$post.title</h1>
[*]$post.posted_on<br/>
[*]$post.content
6、进入主目录在命令行下运行：python blog.py，将启动web服务，在浏览器输入：http://localhost:8080/，简易博客即已完成。
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