补充Carl Meyer，你可以做一个这样的上下文处理器:

module.context_processors.py

from django.conf import settings

def site(request):
    return {'SITE_URL': settings.SITE_URL}

当地settings.py

SITE_URL = 'http://google.com' # this will reduce the Sites framework db call.

settings.py

TEMPLATE_CONTEXT_PROCESSORS = (
    ...
    "module.context_processors.site",
    ....
 )

返回上下文实例的模板，url站点为{{SITE_URL}}

如果想在上下文处理器中处理子域或SSL，可以编写自己的例程。

我认为我们想要的是现有url标签的替代品，所以我写了一个新标签:

from django.template import Library
from django.urls     import reverse

@register.simple_tag(takes_context = True)
def fullURL(context, name, *args, **kwargs):
    request = context['request']
    return f'{request.scheme}://{request.get_host()}{reverse(name, args = args, kwargs = kwargs)}'

然后在你的模板中你可以这样…

{% extends "myapp/email/email_base.html" %}

{% load mytags %} {# Replace mytags with whatever the name of your custom tags calss is. #}

{% block content %}
<p>You can use <a href="{% fullURL 'signup' %}">this link</a> to get started with your account. We look forward to seeing you soon!</p>
{% endblock content %}

然后，当你生成这个时，你只需要记住将请求传递到上下文，就像这样……

from django.template.loader import render_to_string

def sendEmail(subject, to, template, **context):
    html = render_to_string(f'myapp/email/{template}.html', context | {'subject': subject})
    # ... and so on with the rest of my function for sending email...

如果你使用“request”上下文处理器，并且正在使用Django sites框架，并且已经安装了Site中间件(即你的设置包括这些):

INSTALLED_APPS = [
    ...
    "django.contrib.sites",
    ...
]

MIDDLEWARE = [
    ...
     "django.contrib.sites.middleware.CurrentSiteMiddleware",
    ...
]

．.． 那么您将在模板中拥有可用的请求对象，并且它将包含对请求的当前Site的引用，即request. Site。然后你可以在模板中检索域:

    {{request.site.domain}}

并附上网站名称:

    {{request.site.name}}

下面这些可以获得完整的url和部分url:

def myview(request):
    request.build_absolute_uri()
    # http://localhost:8000/admin/store/product/

    request.build_absolute_uri('/')
    # http://localhost:8000/

    request.build_absolute_uri('/')[:-1]
    # http://localhost:8000

    request.scheme
    # http

    request.META['HTTP_HOST']
    # localhost:8000

    request.path    
    # /admin/store/product/

我知道这个问题很老了，但我是在寻找一种python方法来获取当前域时偶然发现的。

def myview(request):
    domain = request.build_absolute_uri('/')[:-1]
    # that will build the complete domain: http://foobar.com

from django.contrib.sites.models import Site
if Site._meta.installed:
    site = Site.objects.get_current()
else:
    site = RequestSite(request)