By CherryPy Team
CherryPy is a web framework upon which you build web applications. The most traditional shape taken by applications is through an HTML user-interface speaking to your CherryPy server.
Let’s see how to handle HTML forms via the following example.
import random
import string
import cherrypy
class StringGenerator(object):
@cherrypy.expose
def index(self):
return """<html>
<head></head>
<body>
<form method="get" action="generate">
<input type="text" value="8" name="length" />
<button type="submit">Give it now!</button>
</form>
</body>
</html>"""
@cherrypy.expose
def generate(self, length=8):
return ''.join(random.sample(string.hexdigits, int(length)))
if __name__ == '__main__':
cherrypy.quickstart(StringGenerator())
Go now to http://localhost:8080/ and your browser and this will display a simple input field to indicate the length of the string you want to generate.
Notice that in this example, the form uses the GET method and when you pressed the Give it now! button, the form is sent using the same URL as in the previous tutorial. HTML forms also support the POST method, in that case the query-string is not appended to the URL but it sent as the body of the client’s request to the server. However, this would not change your application’s exposed method because CherryPy handles both the same way and uses the exposed’s handler parameters to deal with the query-string (key, value) pairs.
