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URL redirects middleware

Author:
gonz
Posted:
December 14, 2007
Language:
Python
Version:
.96
Tags:
middleware url redirect domain
Score:
4 (after 4 ratings)

Sometimes you need to make redirects that involve domains, you can't define those on the site urls, this middleware lets you define multiple redirects on your site settings.

Note: You also can use the web server to do this, but I have found this middleware a useful tool to quickly or temporarily define redirects.

Depending on your needs you may also find useful snippet 434.

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import re

from django.http import HttpResponsePermanentRedirect
from django.conf import settings


class UrlRedirectMiddleware:
    """
    This middleware lets you match a specific url and redirect the request to a
    new url.

    You keep a tuple of url regex pattern/url redirect tuples on your site
    settings, example:

    URL_REDIRECTS = (
        (r'www\.example\.com/hello/$', 'http://hello.example.com/'),
        (r'www\.example2\.com/$', 'http://www.example.com/example2/'),
    )

    """
    def process_request(self, request):
        host = request.META['HTTP_HOST'] + request.META['PATH_INFO']
        for url_pattern, redirect_url in settings.URL_REDIRECTS:
            regex = re.compile(url_pattern)
            if regex.match(host):
                return HttpResponsePermanentRedirect(redirect_url)

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