Files @ d73018440a4d
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Location: website/www/conservancy/middleware.py

bkuhn
Initial hack at a fundraising goal application.

This simple application will simply store the code name and the to goal
of each fundraiser. The so_far number will likely just be updated by
some external script, modifying the appropriate entry in the SQL
database.
from django import http
from django.conf import settings
from django.utils.cache import patch_response_headers

class ForceCanonicalHostnameMiddleware(object):

    def process_request(self, request):
        """Modified common middleware for Conservancy site

        * Performs redirects to strip trailing "index.html"
        * performs redirects based on APPEND_SLASH
        * performs redirects based on site-specific REDIRECT_TABLE
        * adds cache headers to provide hints to squid
        """

        # Never allow connection to the /admin part of the site without SSL
        if (not request.is_secure) and request.path.startswith('/admin'):
            url = 'https://sfconservancy.org%s' % request.path
            return http.HttpResponseRedirect(url)

        # Check for a redirect based on settings.APPEND_SLASH
        host = request.get_host()
        old_url = [host, request.path]
        new_url = old_url[:]
        # Append a slash if append_slash is set and the URL doesn't have a
        # trailing slash or a file extension.
        if settings.APPEND_SLASH and (old_url[1][-1] != '/') and ('.' not in old_url[1].split('/')[-1]):
            new_url[1] = new_url[1] + '/'
            if settings.DEBUG and request.method == 'POST':
                raise RuntimeError, "You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data. Change your form to point to %s%s (note the trailing slash), or set APPEND_SLASH=False in your Django settings." % (new_url[0], new_url[1])
        # Strip trailing index.html
        if new_url[1].endswith('/index.html'):
            new_url[1] = new_url[1][:new_url[1].rfind('index.html')]
        # Consult redirect table (if exists)
        if hasattr(settings, "REDIRECT_TABLE"):
            if settings.REDIRECT_TABLE.has_key(new_url[1]):
                new_url[1] = settings.REDIRECT_TABLE[new_url[1]]
        if new_url != old_url:
            # Force canonical hostname
            if settings.FORCE_CANONICAL_HOSTNAME:
                new_url[0] = settings.FORCE_CANONICAL_HOSTNAME
            # Redirect
            if new_url[0]:
                newurl = "%s://%s%s" % (request.is_secure() and 'https' or 'http', new_url[0], new_url[1])
            else:
                newurl = new_url[1]
            if request.GET:
                newurl += '?' + request.GET.urlencode()
            return http.HttpResponseRedirect(newurl)

        return None

    def process_response(self, request, response):
        # provide hints to squid
        if request.method in ('GET', 'HEAD') and response.status_code == 200:
            patch_response_headers(response)
        return response