web.py开发详解编程语言

web.py需要使用python2.X，所以安装python版本2.7.9

web.py 是一个轻量级Python web框架，它简单而且功能强大

web.py安装

安装python

(1)使用pip

pip install web.py

 安装的目录Python27/Lib/site-packages

(2) IT虾米网下载release版本的web.py

下载下来之后，解压，打开cmd，cd到解压目录下，输入

python setup.py install

查看安装是否成功，pip list

web.py 测试

新建hello.py

import web 

urls = ( 

 /(.*), hello 

app = web.application(urls, globals()) 

class hello: 

 def GET(self, name): 

 if not name: 

 name = World 

 return Hello,  + name + ! 

if __name__ == "__main__": 

 app.run() 

进入保存的目录

python hello.py

在浏览器输入http://127.0.0.1:8080/

命令窗口显示

 第一部分（‘/’）是一个匹配URL 的正则表达式；第二部分（‘index’）是一个类名，匹配的请求将会被发送过去

 若要制定另外的端口使用python code.py 后面添加IP 地址/端口

 如：http://192.168.5.239:8080/aa

 web.py的输出html页面

import web 

urls = ( 

 /(.*), hello 

app = web.application(urls, globals()) 

class hello: 

 def GET(self, name): 

 return open(raa.html,r).read() 

if __name__ == "__main__": 

 app.run() 

aa.html页面是已有的html页面

web.py学习

1.URL映射

完全匹配

模糊匹配

带组匹配

import web 

urls = ( 

 /index,index, 

 /blog//d+,blog, 

 /(.*), hello 

app = web.application(urls, globals()) 

class index: 

 def GET(self): 

 return index method 

class blog: 

 def GET(self): 

 return blog method 

class hello: 

 def GET(self, name): 

 if not name: 

 name = World 

 return Hello,  + name + ! 

if __name__ == "__main__": 

 app.run() 

注：

范围大的要放在后面

2.请求处理

请求参数获取

web.input()

请求头获取

web.ctx.env

hello.py

import web 

urls = ( 

 /index,index, 

 /blog//d+,blog, 

 /(.*), hello 

app = web.application(urls, globals()) 

class index: 

 def GET(self): 

 query = web.input() 

 return query 

class blog: 

 def POST(self): 

 data = web.input() 

 return data 

class hello: 

 def GET(self, name): 

 return open(rhello.html).read() 

if __name__ == "__main__": 

 app.run() 

hello.html

 html 

 head 

 title hello /title 

 head 

 body 

 form action="/blog/123" method="POST" 

 input type="text" name="id" value="" / 

 input type="text" name="name" value="" / 

 input type="submit" value="submit" 

 /form 

 /body 

 /html 

表单提交后

 

 修改代码获取请求头

import web 

urls = ( 

 /index,index, 

 /blog//d+,blog, 

 /(.*), hello 

app = web.application(urls, globals()) 

class index: 

 def GET(self): 

 query = web.input() 

 return query 

class blog: 

 def POST(self): 

 data = web.input() 

 return data 

 def GET(self): 

 data1 = web.ctx.env 

 return data1 

class hello: 

 def GET(self, name): 

 return open(rhello.html).read() 

if __name__ == "__main__": 

 app.run() 

3.相应处理

（1）模板文件读取

render.index( 参数 )

hello.py

import web 

render = web.template.render("templates") 

urls = ( 

 /index,index, 

 /blog//d+,blog, 

 /(.*), hello 

app = web.application(urls, globals()) 

class index: 

 def GET(self): 

 query = web.input() 

 return query 

class blog: 

 def POST(self): 

 data = web.input() 

 return data 

 def GET(self): 

 data1 = web.ctx.env 

 return data1 

class hello: 

 def GET(self, name): 

 return render.hello1(name) 

if __name__ == "__main__": 

 app.run() 

在hello.py同级目录下，存在templates/hello1.html

hello1.html

$def with(name) 

 html 

 head 

 title hello1 /title 

 head 

 body 

 h1 hello1,$name /h1 

 form action="/blog/123" method="POST" 

 input type="text" name="id" value="" / 

 input type="text" name="name" value="" / 

 input type="submit" value="submit" 

 /form 

 /body 

 /html 

（2）结果数据处理

model.select( sql)

安装已编译版本 下载MySQldb ,安装已编译版本

goods.py

import web 

import MySQLdb 

import MySQLdb.cursors 

render = web.template.render("templates") 

urls = ( 

 /goods,goods 

app = web.application(urls, globals()) 

class goods: 

 def GET(self): 

 conn = MySQLdb.connect(host=127.0.0.1,user=root,passwd=root,db=mshop_dev,port=3306,charset="utf8",cursor "select * from mshop_goods limit 5") 

 r=cur.fetchall() 

 cur.close() 

 conn.close() 

 print r 

 return render.goods(r) 

if __name__ == "__main__": 

 app.run() 

goods.html

$def with(r) 

 html 

 head 

 meta charset="utf-8" / 

 title goods /title 

 head 

 body 

 h1 商品列表 /h1 

 $for l in r: 

 li $l.get(goods_id),$l.get(goods_name)= $l.get(store_name) li 

 /ul 

 /body 

 /html 

（3）URL跳转

web.seeother( / )

import web 

import MySQLdb 

import MySQLdb.cursors 

render = web.template.render("templates") 

urls = ( 

 /index,index, 

 /goods,goods, 

 /(.*), hello 

app = web.application(urls, globals()) 

class index: 

 def GET(self): 

 return web.seeother("/goods") 

class goods: 

 def GET(self): 

 conn = MySQLdb.connect(host=127.0.0.1,user=root,passwd=root,db=mshop_dev,port=3306,charset="utf8",cursor "select * from mshop_goods limit 5") 

 r=cur.fetchall() 

 cur.close() 

 conn.close() 

 print r 

 return render.goods(r) 

class hello: 

 def GET(self, name): 

 return web.seeother("http://baidu.com") 

if __name__ == "__main__": 

 app.run() 

输入http://127.0.0.1/index跳转到http://127.0.0.1:8080/goods

输入http://127.0.0.1/hello跳转到https://www.baidu.com/

注:

web.py的静态文件必须放在static文件夹下面

web.py并不具备部署网站的能力，因此对于web.py程序只能在本地访问，如果要进行部署必须要使用apache、nginx、lighttped

通过FastCGI结合lighttpd是web.py，通过该方法可以处理百万次的点击

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/20510.html

cgomysqlpython