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53 lines
2.0 KiB
Python
53 lines
2.0 KiB
Python
from django.conf import settings
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from django.http import HttpRequest
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import re
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from typing import Optional
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from zerver.models import Realm, UserProfile
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def get_subdomain(request: HttpRequest) -> str:
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# The HTTP spec allows, but doesn't require, a client to omit the
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# port in the `Host` header if it's "the default port for the
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# service requested", i.e. typically either 443 or 80; and
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# whatever Django gets there, or from proxies reporting that via
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# X-Forwarded-Host, it passes right through the same way. So our
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# logic is a bit complicated to allow for that variation.
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#
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# For both EXTERNAL_HOST and REALM_HOSTS, we take a missing port
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# to mean that any port should be accepted in Host. It's not
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# totally clear that's the right behavior, but it keeps
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# compatibility with older versions of Zulip, so that's a start.
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host = request.get_host().lower()
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return get_subdomain_from_hostname(host)
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def get_subdomain_from_hostname(host: str) -> str:
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m = re.search(fr'\.{settings.EXTERNAL_HOST}(:\d+)?$',
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host)
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if m:
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subdomain = host[:m.start()]
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if subdomain in settings.ROOT_SUBDOMAIN_ALIASES:
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return Realm.SUBDOMAIN_FOR_ROOT_DOMAIN
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return subdomain
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for subdomain, realm_host in settings.REALM_HOSTS.items():
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if re.search(fr'^{realm_host}(:\d+)?$',
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host):
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return subdomain
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return Realm.SUBDOMAIN_FOR_ROOT_DOMAIN
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def is_subdomain_root_or_alias(request: HttpRequest) -> bool:
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return get_subdomain(request) == Realm.SUBDOMAIN_FOR_ROOT_DOMAIN
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def user_matches_subdomain(realm_subdomain: Optional[str], user_profile: UserProfile) -> bool:
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if realm_subdomain is None:
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return True # nocoverage # This state may no longer be possible.
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return user_profile.realm.subdomain == realm_subdomain
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def is_root_domain_available() -> bool:
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if settings.ROOT_DOMAIN_LANDING_PAGE:
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return False
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return not Realm.objects.filter(string_id=Realm.SUBDOMAIN_FOR_ROOT_DOMAIN).exists()
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