Mercurial > ift6266

diff 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
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pycaptcha/modpython_example.py	Thu Feb 11 05:09:46 2010 -0500
@@ -0,0 +1,113 @@
+#
+# An example that presents CAPTCHA tests in a web environment
+# and gives the user a chance to solve them.
+#
+# This example is for use with Apache using mod_python and its
+# Publisher handler. For example, if your apache configuration
+# included something like:
+#
+#   AddHandler python-program .py
+#   PythonHandler mod_python.publisher
+#
+# You could place this script anywhere in your web space to see
+# the demo.
+#
+# --Micah <micah@navi.cx>
+#
+
+from Captcha.Visual import Tests
+import Captcha
+from mod_python import apache
+
+
+def _getFactory(req):
+    return Captcha.PersistentFactory("/tmp/pycaptcha_%s" % req.interpreter)
+
+
+def test(req, name=Tests.__all__[0]):
+    """Show a newly generated CAPTCHA of the given class.
+       Default is the first class name given in Tests.__all__
+       """
+    test = _getFactory(req).new(getattr(Tests, name))
+
+    # Make a list of tests other than the one we're using
+    others = []
+    for t in Tests.__all__:
+        if t != name:
+            others.append('<li><a href="?name=%s">%s</a></li>' % (t,t))
+    others = "\n".join(others)
+
+    return """<html>
+<head>
+<title>PyCAPTCHA Example</title>
+</head>
+<body>
+<h1>PyCAPTCHA Example (for mod_python)</h1>
+<p>
+  <b>%s</b>:
+  %s
+</p>
+
+<p><img src="image?id=%s"/></p>
+<p>
+  <form action="solution" method="get">
+    Enter the word shown:
+    <input type="text" name="word"/>
+    <input type="hidden" name="id" value="%s"/>
+  </form>
+</p>
+
+<p>
+Or try...
+<ul>
+%s
+</ul>
+</p>
+
+</body>
+</html>
+""" % (test.__class__.__name__, test.__doc__, test.id, test.id, others)
+
+
+def image(req, id):
+    """Generate an image for the CAPTCHA with the given ID string"""
+    test = _getFactory(req).get(id)
+    if not test:
+        raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
+    req.content_type = "image/jpeg"
+    test.render().save(req, "JPEG")
+    return apache.OK
+
+
+def solution(req, id, word):
+    """Grade a CAPTCHA given a solution word"""
+    test = _getFactory(req).get(id)
+    if not test:
+        raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
+
+    if not test.valid:
+        # Invalid tests will always return False, to prevent
+        # random trial-and-error attacks. This could be confusing to a user...
+        result = "Test invalidated, try another test"
+    elif test.testSolutions([word]):
+        result = "Correct"
+    else:
+        result = "Incorrect"
+
+    return """<html>
+<head>
+<title>PyCAPTCHA Example</title>
+</head>
+<body>
+<h1>PyCAPTCHA Example</h1>
+<h2>%s</h2>
+<p><img src="image?id=%s"/></p>
+<p><b>%s</b></p>
+<p>You guessed: %s</p>
+<p>Possible solutions: %s</p>
+<p><a href="test">Try again</a></p>
+</body>
+</html>
+""" % (test.__class__.__name__, test.id, result, word, ", ".join(test.solutions))
+
+### The End ###