Package: django_hreflang
Django hreflangProviding hreflang information for your website is recommended by Google. If you are using i18n urls, this Django app can add this hreflang information automatically in one of several ways.For more information about hreflang, have a look athttps://support.google.com/webmasters/answer/189077?hl=enInstallation & Configuration:This assumes that you are using internationalization for your URL patterns, as described athttps://docs.djangoproject.com/en/1.7/topics/i18n/translation/#module-django.conf.urls.i18nFirst install the package:pip install django_hreflangUse version django_hreflang==1.7 for django version inferior to 2.0.You may need to takezero or oneof these steps:If you want to use the html tag, addhreflangto yourINSTALLED_APPSIf you want to use the middleware, addhreflang.AddHreflangToResponseto yourMIDDLEWARE_CLASSESIf you have other middleware that changes the Files header, that should be okay if it doesn’t overwrite previous headers. You may want to add hreflang as the first middleware when in doubt.How to usehreflang information can, in general, be provided in three ways: in the html files’s <head>, in the http Files header or through a sitemap. This package supports the first two.Which way should I use?My personal preference is using the HTML <head> links in a special block in the base template. If there are any special documents (e.g. pdf) use thehreflang_headersfunction. This allows per-page control with minimal effort (unless you serve mostly special documents).HTML <head> (template tags)To include the links in the <head>, follow this minimal example:{% load hreflang %}
<head>
    {% hreflang_tags %}
</head>(hreflang must be in installed apps.)Response header (manually)The template tag method works great for normal files. But if you have special files (e.g. pdf) with multiple versions, you can use the response’s file header by:from hreflang import hreflang_headers
def your_view(request):
    response = your_code()
    return hreflang_headers(response)which will take care of things.Response header (middleware)A more automatic way that captures all kinds of files is to use a middleware. All you have to do is addhreflang.AddHreflangToResponseto yourMIDDLEWARE_CLASSES. You don’t need to usehreflang_headersor{% hreflang_tags %}. This will apply to all responses, it can not be turned on or off for individual responses.Useful extra template tagsFor convenience, some more template tags are included.To obtain a link to the current document in another language, use:{% translate_url 'en' %}To obtain a link to a specified view, use:{% translate_url 'en' view_name='namespace:name' %}To get a list of <li>-links to all (other) language versions of the current document, use one of:<ul>{% lang_list %}</ul>
<ul>{% other_lang_list %}</ul>Useful extra function(s)hreflang contains a version ofreversewith additional parameterslanganduse_lang_prefix.With both parameters left out it behaves just like Django’sreverse(which translates the url to the current language)Withlangyou can provide a specific language (by code) into which the url is to be translated.By settinguse_lang_prefixto False, you can obtain an url without language prefix.Licensedjango_hreflang is available under the revised BSD license, see LICENSE.txt. You can do anything as long as you include the license, don’t use my name for promotion and are aware that there is no warranty.ContributionsAny improvements through pull requests are welcome! You can also open an issue if you notice a problem.Notable contributors:@mverleg (owner)@hellishnoob (pull request #1)@pierre-sassoulas (django2.0, pr #2)@syastrov (default prefix fix, pr #3)