Mercurial > ift6266

comparison pycaptcha/modpython_example.py @ 87:4775b4195b4b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
code pour la generation de captchas
author goldfinger
date Thu, 11 Feb 2010 05:09:46 -0500
parents
children
comparison
equal deleted inserted replaced
86:b3d76ebf2fac 87:4775b4195b4b
1 #
2 # An example that presents CAPTCHA tests in a web environment
3 # and gives the user a chance to solve them.
4 #
5 # This example is for use with Apache using mod_python and its
6 # Publisher handler. For example, if your apache configuration
7 # included something like:
8 #
9 # AddHandler python-program .py
10 # PythonHandler mod_python.publisher
11 #
12 # You could place this script anywhere in your web space to see
13 # the demo.
14 #
15 # --Micah <micah@navi.cx>
16 #
17
18 from Captcha.Visual import Tests
19 import Captcha
20 from mod_python import apache
21
22
23 def _getFactory(req):
24 return Captcha.PersistentFactory("/tmp/pycaptcha_%s" % req.interpreter)
25
26
27 def test(req, name=Tests.__all__[0]):
28 """Show a newly generated CAPTCHA of the given class.
29 Default is the first class name given in Tests.__all__
30 """
31 test = _getFactory(req).new(getattr(Tests, name))
32
33 # Make a list of tests other than the one we're using
34 others = []
35 for t in Tests.__all__:
36 if t != name:
37 others.append('<li><a href="?name=%s">%s</a></li>' % (t,t))
38 others = "\n".join(others)
39
40 return """<html>
41 <head>
42 <title>PyCAPTCHA Example</title>
43 </head>
44 <body>
45 <h1>PyCAPTCHA Example (for mod_python)</h1>
46 <p>
47 <b>%s</b>:
48 %s
49 </p>
50
51 <p><img src="image?id=%s"/></p>
52 <p>
53 <form action="solution" method="get">
54 Enter the word shown:
55 <input type="text" name="word"/>
56 <input type="hidden" name="id" value="%s"/>
57 </form>
58 </p>
59
60 <p>
61 Or try...
62 <ul>
63 %s
64 </ul>
65 </p>
66
67 </body>
68 </html>
69 """ % (test.__class__.__name__, test.__doc__, test.id, test.id, others)
70
71
72 def image(req, id):
73 """Generate an image for the CAPTCHA with the given ID string"""
74 test = _getFactory(req).get(id)
75 if not test:
76 raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
77 req.content_type = "image/jpeg"
78 test.render().save(req, "JPEG")
79 return apache.OK
80
81
82 def solution(req, id, word):
83 """Grade a CAPTCHA given a solution word"""
84 test = _getFactory(req).get(id)
85 if not test:
86 raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
87
88 if not test.valid:
89 # Invalid tests will always return False, to prevent
90 # random trial-and-error attacks. This could be confusing to a user...
91 result = "Test invalidated, try another test"
92 elif test.testSolutions([word]):
93 result = "Correct"
94 else:
95 result = "Incorrect"
96
97 return """<html>
98 <head>
99 <title>PyCAPTCHA Example</title>
100 </head>
101 <body>
102 <h1>PyCAPTCHA Example</h1>
103 <h2>%s</h2>
104 <p><img src="image?id=%s"/></p>
105 <p><b>%s</b></p>
106 <p>You guessed: %s</p>
107 <p>Possible solutions: %s</p>
108 <p><a href="test">Try again</a></p>
109 </body>
110 </html>
111 """ % (test.__class__.__name__, test.id, result, word, ", ".join(test.solutions))
112
113 ### The End ###