django-multitenant-middleware 0.1.0

HTTP + WebSocket middleware for multi-tenant Django projects

django-multitenant-middleware

django-multitenant-middleware is a Django package that provides multi-tenant support for both HTTP and WebSocket (Channels) requests. It resolves tenants dynamically based on subdomains, hostnames, or custom headers.

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Installation

pip install django-multitenant-middleware

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Settings Configuration (HTTP)

1. Define your tenant model in settings.py:

CHANNELS_MULTITENANT_TENANT_MODEL = "tenants.Client"

# Optional: Custom resolver class and args
CHANNELS_MULTITENANT_RESOLVER_CLASS = None  # defaults to FlexibleSubdomainTenantResolver
CHANNELS_MULTITENANT_RESOLVER_ARGS = {"base_domain": BASE_DOMAIN}

2. Add the middleware to your Django MIDDLEWARE list:

MIDDLEWARE = [
    # Other middleware...
    "channels_multitenant.http_middleware.TenantHTTPMiddleware",
]

The middleware automatically sets request.tenant and request.tenant_context.

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WebSocket Integration (ASGI)

1. In asgi.py:

import os
import django
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
from django.core.asgi import get_asgi_application

from channels_multitenant.ws_middleware import TenantWebSocketMiddleware
from channels_multitenant.resolvers import FlexibleSubdomainTenantResolver
from tenants.models import Client
from core.websocket.routing import websocket_urlpatterns

2. Setup ASGI:

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "core.settings")
django.setup()
django_asgi_app = get_asgi_application()

3. Configure tenant resolver:

resolver = FlexibleSubdomainTenantResolver(
    base_domain="app.example.com",  # your base domain
    separators=("-", ".")
)

4. Wrap WebSocket routes:

application = ProtocolTypeRouter({
    "http": django_asgi_app,
    "websocket": TenantWebSocketMiddleware(
        AuthMiddlewareStack(
            URLRouter(websocket_urlpatterns)
        ),
        tenant_model=Client,  # your tenant model
        resolver=resolver,
    ),
})

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Tenant Resolvers

• FlexibleSubdomainTenantResolver: Extracts tenant from subdomain prefixes Example: tenant1-app.example.com → tenant1

• HeaderTenantResolver: Extracts tenant from a custom HTTP header Example: X-Tenant-ID: tenant1 → tenant1

• Custom Resolver: Subclass BaseTenantResolver to implement your logic

from channels_multitenant.resolvers import BaseTenantResolver

class MyCustomResolver(BaseTenantResolver):
    def resolve(self, scope) -> str | None:
        # Implement your custom logic
        return "my_tenant"

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TenantFetcher (Optional Helper)

TenantFetcher provides async caching for WebSocket tenants:

from channels_multitenant.tenant_fetcher import TenantFetcher
from tenants.models import Client

fetcher = TenantFetcher(Client)
tenant = await fetcher.get_tenant("tenant1")

• Caches tenants (default 5 minutes)
• Async-ready for Channels

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Notes

• Ensure CHANNELS_MULTITENANT_TENANT_MODEL points to your tenant model.
• Missing or invalid settings will raise ImproperlyConfigured.
• Compatible with Django 4.x+ and Channels 3.x+.