diff pycaptcha/modpython_example.py @ 87:4775b4195b4b

code pour la generation de captchas
author goldfinger
date Thu, 11 Feb 2010 05:09:46 -0500
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pycaptcha/modpython_example.py	Thu Feb 11 05:09:46 2010 -0500
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+#
+# 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 ###