web.py 十分钟创建简易博客实现代码
一、web.py简介
web.py是一款轻量级的Pythonweb开发框架，简单、高效、学习成本低，特别适合作为pythonweb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：pythonsetup.pyinstall
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”
CREATETABLEentries( idINTAUTO_INCREMENT, titleTEXT, contentTEXT, posted_onDATETIME, primarykey(id) );
3、在主目录创建blog.py，blog/blog.py
#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
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=$id',vars=locals())[0]
exceptIndexError:
returnNone
#新建文章
defnew_post(title,text):
db.insert('entries',
title=title,
content=text,
posted_on=datetime.datetime.utcnow())
#删除文章
defdel_post(id):
db.delete('entries',where='id=$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
<!--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：pythonblog.py，将启动web服务，在浏览器输入：http://localhost:8080/，简易博客即已完成。