58 lines
2.7 KiB
Python
58 lines
2.7 KiB
Python
from builtins import object
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from django import http
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from django.conf import settings
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from django.utils.cache import patch_response_headers
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class ForceCanonicalHostnameMiddleware(object):
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def process_request(self, request):
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"""Modified common middleware for Conservancy site
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* Performs redirects to strip trailing "index.html"
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* performs redirects based on APPEND_SLASH
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* performs redirects based on site-specific REDIRECT_TABLE
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* adds cache headers to provide hints to squid
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"""
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# Never allow connection to the /admin part of the site without SSL
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if (not request.is_secure) and request.path.startswith('/admin'):
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url = 'https://sfconservancy.org%s' % request.path
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return http.HttpResponseRedirect(url)
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# Check for a redirect based on settings.APPEND_SLASH
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host = request.get_host()
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old_url = [host, request.path]
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new_url = old_url[:]
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# Append a slash if append_slash is set and the URL doesn't have a
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# trailing slash or a file extension.
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if settings.APPEND_SLASH and (old_url[1][-1] != '/') and ('.' not in old_url[1].split('/')[-1]):
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new_url[1] = new_url[1] + '/'
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if settings.DEBUG and request.method == 'POST':
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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]))
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# Strip trailing index.html
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if new_url[1].endswith('/index.html'):
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new_url[1] = new_url[1][:new_url[1].rfind('index.html')]
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# Consult redirect table (if exists)
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if hasattr(settings, "REDIRECT_TABLE"):
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if new_url[1] in settings.REDIRECT_TABLE:
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new_url[1] = settings.REDIRECT_TABLE[new_url[1]]
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if new_url != old_url:
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# Force canonical hostname
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if settings.FORCE_CANONICAL_HOSTNAME:
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new_url[0] = settings.FORCE_CANONICAL_HOSTNAME
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# Redirect
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if new_url[0]:
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newurl = "%s://%s%s" % (request.is_secure() and 'https' or 'http', new_url[0], new_url[1])
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else:
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newurl = new_url[1]
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if request.GET:
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newurl += '?' + request.GET.urlencode()
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return http.HttpResponseRedirect(newurl)
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return None
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def process_response(self, request, response):
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# provide hints to squid
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if request.method in ('GET', 'HEAD') and response.status_code == 200:
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patch_response_headers(response)
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return response
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