How do I make a trailing slash optional with webapp2?

Question

I\'m using the new webapp2 (now the default webapp in 1.6), and I haven\'t been able to figure out how to make the trailing slash optional in code like this:

web         


        

Answer 1

If you don't want to use redirects (and you probably don't), you can override Route.match():

from webapp2 import Route, _get_route_variables
import urllib
from webob import exc


class SloppyRoute(Route):
    """
    A route with optional trailing slash.
    """
    def __init__(self, *args, **kwargs):
        super(SloppyRoute, self).__init__(*args, **kwargs)

    def match(self, request):
        path = urllib.unquote(request.path)
        match = self.regex.match(path)
        try:
            if not match and not path.endswith('/'):
                match = self.regex.match(path + '/')
        except:
            pass
        if not match or self.schemes and request.scheme not in self.schemes:
            return None

        if self.methods and request.method not in self.methods:
            # This will be caught by the router, so routes with different
            # methods can be tried.
            raise exc.HTTPMethodNotAllowed()

        args, kwargs = _get_route_variables(match, self.defaults.copy())
        return self, args, kwargs