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    * Using Site Layout Templates
    * File Upload
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Requests: == 网站排版模板 ==

 命题::Problem
 * 如何在web.py 应用中使用排版模板?
 解决::
 * 在应用过程中直接使用
{{{#!python

app = web.application(urls, gloabals)
render = web.template.render('templates/')

def layout_processor(handle):
    result = handle()
    return render.layout(result)

app.add_processor(layout_processor)
}}}

== 文件上传 ==
 命题::
 * 即使你对表单上传或是CGI生成不熟悉，文件上传也可以轻易支持的

 解决::
{{{
import web

urls = ('/upload', 'Upload')

class Upload:
    def GET(self):
        return """<html><head></head><body>
<form method="POST" enctype="multipart/form-data" action="">
<input type="file" name="myfile" />
<br/>
<input type="submit" />
</form>
</body></html>"""

    def POST(self):
        x = web.input(myfile={})
        web.debug(x['myfile'].value) # This is the file contents
        web.debug(x['myfile'].filename) # This is the filename
        web.redirect('/upload')


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

if __name__ == "__main__":
    app.run()
}}}

 探讨::
 * 有些事儿得注意:
  * 对应表单必须有`enctype="multipart/form-data"`聲明，否则不会起作用
  * 在 webpy 代码中, 如果将文件作为想导入CGI`FieldStorage`对象，默认值是必须的(myfile={}部分) .
  * 否则将被视作文本文件-- 此例中，你这无法知道文件命了.


== 预备命题 ==

http://webpy.org/static/webpy.gif WebPy ~ 超轻量WSGI 应用框架

::-- ZoomQuiet [DateTime(2008-02-24T06:19:46Z)] TableOfContents

Include(CPUGnav)

web.py 0.3 的食谱格式文档.

1. web.py 食谱

1.1. Hello World!

命题

怎么使用web.py 写个hello world?

解决

   1 import web
   2 
   3 urls = ("/.*", "hello")
   4 app = web.application(urls, globals())
   5 
   6 class hello:
   7     def GET(self):
   8         return 'Hello, world!'
   9 
  10 if __name__ == "__main__":
  11     app.run()

1.2. 客户对话～Sessions

命题
  • 如果在web.py 中运用 客户对话？
    • 解决

  • web.session模块专门进行了支持，以下实例 

    •    1 import web
   2 urls = (
   3     "/count", "count",
   4     "/reset", "reset"
   5 )
   6 app = web.application(urls, locals())
   7 session = web.session.Session(app, web.session.DiskStore('sessions'), initializer={'count': 0})
   8 
   9 class count:
  10     def GET(self):
  11         session.count += 1
  12         return str(session.count)
  13 
  14 class reset:
  15     def GET(self):
  16         session.kill()
  17         return ""
  18 
  19 if __name__ == "__main__":
  20     app.run()
    • 对话对象在响应请求句柄前加载，前在请求句柄后保存变更

    • initializer 参数用以初创对话

    1.3. 邮件

    命题
  • 如何通过 web.py 操作邮件?
    • 解决

  • web.sendmail函式用以发送邮件 

    • web.sendmail('[email protected]', '[email protected]', 'subject', 'message')

    • 配置web.config可通过其它邮件服务发送比如:/usr/lib/sendmail. 

    web.config.smtp_server = 'mail.mydomain.com'

    • 可以在to_address 参数中指定多个地址 

    web.sendmail('[email protected]'
    , ['[email protected]', '[email protected]']
    , 'subject', 'message')

    • 使用cc和bcc键参数，则声明转发和暗送邮箱地址(使用列表，同樣支持多地址Cc Bcc) 

    web.sendmail('[email protected]', 
    '[email protected]', 'subject', 'message', 
    cc='[email protected]', 
    bcc='[email protected]')

    1.4. 网站排版模板

    • 命题::Problem
    • 如何在web.py 应用中使用排版模板?
      • 解决
    • 在应用过程中直接使用 

       1 app = web.application(urls, gloabals)
   2 render = web.template.render('templates/')
   3 
   4 def layout_processor(handle):
   5     result = handle()
   6     return render.layout(result)
   7 
   8 app.add_processor(layout_processor)

    1.5. 文件上传

    命题
  • 即使你对表单上传或是CGI生成不熟悉，文件上传也可以轻易支持的
    • 解决

    import web

urls = ('/upload', 'Upload')

class Upload:
    def GET(self):
        return """<html><head></head><body>
<form method="POST" enctype="multipart/form-data" action="">
<input type="file" name="myfile" />
<br/>
<input type="submit" />
</form>
</body></html>"""

    def POST(self):
        x = web.input(myfile={})
        web.debug(x['myfile'].value) # This is the file contents
        web.debug(x['myfile'].filename) # This is the filename
        web.redirect('/upload')


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

if __name__ == "__main__":
    app.run()
    探讨
  • 有些事儿得注意:

    • 对应表单必须有enctype="multipart/form-data"聲明，否则不会起作用

    • 在 webpy 代码中, 如果将文件作为想导入CGIFieldStorage对象，默认值是必须的(myfile={}部分) .

    • 否则将被视作文本文件-- 此例中，你这无法知道文件命了.

    • 1.6. 预备命题

    • How to properly use web.background

    1.7. 反馈

    PageComment2 [:/PageCommentData:PageCommentData]

    WebPyCookBook (last edited 2009-12-25 07:15:23 by localhost)