Middleware that appends slashes as to not break our url routes.

canonical.py

from logger import statsd
import settings


class CanonicalMiddleware(object):
    """Adjust incoming URLs to have a / so our routing still works.

    Additionally this saves the canonical version of the url at
    `request.canonical`.

    """

    def process_request(self, request):
        if not request.path.endswith('/'):
            statsd.sc.increment("web.middleware.canonical.canonize_path")
            request.path += "/"
        if not request.path_info.endswith('/'):
            request.path_info += "/"
        if not request.META['PATH_INFO'].endswith('/'):
            request.META['PATH_INFO'] += '/'

        proto = 'http'
        if request.is_secure():
            proto = 'https'
        host = request.META.get('HTTP_HOST', settings.MAIN_DOMAIN)
        request.canonical = u'{}://{}{}'.format(proto, host, request.path)
        if request.META.get('QUERY_STRING'):
            request.canonical += u'?{}'.format(request.META['QUERY_STRING'])