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diff data_generation/transformations/pycaptcha/http_example.py @ 167:1f5937e9e530

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More moves - transformations into data_generation, added "deep" folder
author Dumitru Erhan <dumitru.erhan@gmail.com>
date Fri, 26 Feb 2010 14:15:38 -0500
parents pycaptcha/http_example.py@4775b4195b4b
children
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data_generation/transformations/pycaptcha/http_example.py	Fri Feb 26 14:15:38 2010 -0500
@@ -0,0 +1,154 @@
+#!/usr/bin/env python
+#
+# An example that presents CAPTCHA tests in a web environment
+# and gives the user a chance to solve them. Run it, optionally
+# specifying a port number on the command line, then point your web
+# browser at the given URL.
+#
+
+from Captcha.Visual import Tests
+from Captcha import Factory
+import BaseHTTPServer, urlparse, sys
+
+
+class RequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
+    def do_GET(self):
+        scheme, host, path, parameters, query, fragment = urlparse.urlparse(self.path)
+
+        # Split the path into segments
+        pathSegments = path.split('/')[1:]
+
+        # Split the query into key-value pairs
+        args = {}
+        for pair in query.split("&"):
+            if pair.find("=") >= 0:
+                key, value = pair.split("=", 1)
+                args.setdefault(key, []).append(value)
+            else:
+                args[pair] = []
+
+        # A hack so it works with a proxy configured for VHostMonster :)
+        if pathSegments[0] == "vhost":
+            pathSegments = pathSegments[3:]
+
+        if pathSegments[0] == "":
+            self.handleRootPage(args.get('test', Tests.__all__)[0])
+
+        elif pathSegments[0] == "images":
+            self.handleImagePage(pathSegments[1])
+
+        elif pathSegments[0] == "solutions":
+            self.handleSolutionPage(pathSegments[1], args['word'][0])
+
+        else:
+            self.handle404()
+
+    def handle404(self):
+        self.send_response(404)
+        self.send_header("Content-Type", "text/html")
+        self.end_headers()
+        self.wfile.write("<html><body><h1>No such resource</h1></body></html>")
+
+    def handleRootPage(self, testName):
+        self.send_response(200)
+        self.send_header("Content-Type", "text/html")
+        self.end_headers()
+
+        test = self.captchaFactory.new(getattr(Tests, testName))
+
+        # Make a list of tests other than the one we're using
+        others = []
+        for t in Tests.__all__:
+            if t != testName:
+                others.append('<li><a href="/?test=%s">%s</a></li>' % (t,t))
+        others = "\n".join(others)
+
+        self.wfile.write("""<html>
+<head>
+<title>PyCAPTCHA Example</title>
+</head>
+<body>
+<h1>PyCAPTCHA Example</h1>
+<p>
+  <b>%s</b>:
+  %s
+</p>
+
+<p><img src="/images/%s"/></p>
+<p>
+  <form action="/solutions/%s" method="get">
+    Enter the word shown:
+    <input type="text" name="word"/>
+  </form>
+</p>
+
+<p>
+Or try...
+<ul>
+%s
+</ul>
+</p>
+
+</body>
+</html>
+""" % (test.__class__.__name__, test.__doc__, test.id, test.id, others))
+
+    def handleImagePage(self, id):
+        test = self.captchaFactory.get(id)
+        if not test:
+            return self.handle404()
+
+        self.send_response(200)
+        self.send_header("Content-Type", "image/jpeg")
+        self.end_headers()
+        test.render().save(self.wfile, "JPEG")
+
+    def handleSolutionPage(self, id, word):
+        test = self.captchaFactory.get(id)
+        if not test:
+            return self.handle404()
+
+        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"
+
+        self.send_response(200)
+        self.send_header("Content-Type", "text/html")
+        self.end_headers()
+        self.wfile.write("""<html>
+<head>
+<title>PyCAPTCHA Example</title>
+</head>
+<body>
+<h1>PyCAPTCHA Example</h1>
+<h2>%s</h2>
+<p><img src="/images/%s"/></p>
+<p><b>%s</b></p>
+<p>You guessed: %s</p>
+<p>Possible solutions: %s</p>
+<p><a href="/">Try again</a></p>
+</body>
+</html>
+""" % (test.__class__.__name__, test.id, result, word, ", ".join(test.solutions)))
+
+
+def main(port):
+    print "Starting server at http://localhost:%d/" % port
+    handler = RequestHandler
+    handler.captchaFactory = Factory()
+    BaseHTTPServer.HTTPServer(('', port), RequestHandler).serve_forever()
+
+if __name__ == "__main__":
+    # The port number can be specified on the command line, default is 8080
+    if len(sys.argv) >= 2:
+        port = int(sys.argv[1])
+    else:
+        port = 8080
+    main(port)
+
+### The End ###