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← Revision 3 as of 2009-12-25 07:14:31 ⇥
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1 # -*- coding: utf-8 -*-
2 """
3 Tutorial 08 - 对话
4
5 保存对话信息在 CP2 中非常的简单:
6 cpg.request 提供了一个字典对象叫 sessionMap 记录了当前用户的会话数据.
7 如果你使用的是内存(RAM)式的会话,你可以保存任何类型的对象在此字典中;
8 否则,你将限制只能保持可以被线性化的对象.
9 """
10 from cherrypy import cpg
11 #改造,增加 Aspect机制
12 from cherrypy.lib.aspect import Aspect, STOP, CONTINUE
13
14 class Page(Aspect):
15 """要求从 Aspect 继承类
16 """
17 title = 'Untitled Page'
18
19 def __init__(self):
20 """增加全局性点击计数对象
21 """
22 self.count = 0
23 def _count(self):
24 """想简单的增加统一的计数函式,发现不行!
25 """
26 # 创建无聊的点击计数
27 self.count = cpg.request.sessionMap.get('count', 0) + 1
28 # 记录计数在会话对象中
29 cpg.request.sessionMap['count'] = self.count
30
31 def header(self):
32 """强调页面编码
33 """
34 return '''
35 <html>
36 <head>
37 <title>%s</title>
38 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
39 <head>
40 <body>
41 <h2>%s</h2>
42 ''' % (self.title, self.title)
43
44 def footer(self):
45 return '''
46 </body>
47 </html>
48 '''
49
50 def _before(self, methodName, method):
51 """投影函式 _before 会在任何函式运行时被调用，如果你有一些函式不想如此处理
52 可以在调用前检测一下
53 """
54 #self.count = cpg.request.sessionMap.get('count', 0) + 1
55 if methodName not in ['header', 'footer']:
56 return CONTINUE, self.header()
57 else:
58 return CONTINUE, ''
59
60 def _after(self, methodName, method):
61 """同上投影函式 _after 是在任何函式运行后自动调用
62 """
63 #cpg.request.sessionMap['count'] = self.count
64 if methodName not in ['header', 'footer']:
65 return CONTINUE, self.footer()
66 else:
67 return CONTINUE, ''
68
69 class HitCounter(Page):
70 """点击计数页面对象
71 """
72 title = '点击计数 尝试页面!'
73 def __init__(self):
74 """直接增加下层对象
75 """
76 self.deep = DeepPage()
77 def index(self):
78 # 创建无聊的点击计数
79 self.count = cpg.request.sessionMap.get('count', 0) + 1
80 # 记录计数在会话对象中
81 cpg.request.sessionMap['count'] = self.count
82 #self._count()
83
84 # 在页面中显示计数信息
85 return '''
86 During your current session, you've viewed this
87 page %s times! Your life is a patio of fun!
88
89 <hr/>
90 goto deep page count again!?
91 <a href="deep">deep page</a>
92 ''' % self.count
93
94 index.exposed = True
95
96 class DeepPage(Page):
97 """下层对象的展示
98 """
99 title = 'DeepPage base AnotherPage'
100 def index(self):
101 #self._count()
102
103 # 创建无聊的点击计数
104 self.count = cpg.request.sessionMap.get('count', 0) + 1
105 # 记录计数在会话对象中
106 cpg.request.sessionMap['count'] = self.count
107
108 return '''
109 <p>
110 在下层对象中继续计数!
111 </p>:%s
112 <hr/>
113 <a href="../">go back </a>
114 '''% self.count
115
116 index.exposed = True
117
118
119 cpg.root = HitCounter()
120
121 cpg.server.start(configFile = 'tutorial.conf')