Serves static files from multiple local directories at a single external url

StaticFileScanner.py

# Serves static files from multiple local directories at a single external url
# usage demo: https://gist.github.com/aausch/7348230
# 
# Copyright 2013, Alex Ausch 
# Free to use under attribution license: http://creativecommons.org/licenses/by/2.0/ca/

from twisted.web.resource import Resource
from twisted.web.static import File

class StaticFileScanner(Resource):
    dirs = []
    def __init__(self, *dirs):
        if (len(dirs) < 1):
            self.dirs = [File()]
        else:
            self.dirs = [File(d) for d in dirs]
        Resource.__init__(self)
    
    def getChild(self, *args):
        for d in self.dirs:
            if d.getChild(*args) != d.childNotFound:
                return d.getChild(*args)
        return self.dirs[0].childNotFound