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import re
from importlib import import_module
import django
import pytest
from django.conf import settings
from channels.consumer import AsyncConsumer
from channels.db import database_sync_to_async
from channels.sessions import CookieMiddleware, SessionMiddlewareStack
from channels.testing import HttpCommunicator
class SimpleHttpApp(AsyncConsumer):
"""
Barebones HTTP ASGI app for testing.
"""
async def http_request(self, event):
await database_sync_to_async(self.scope["session"].save)()
assert self.scope["path"] == "/test/"
assert self.scope["method"] == "GET"
await self.send({"type": "http.response.start", "status": 200, "headers": []})
await self.send({"type": "http.response.body", "body": b"test response"})
@pytest.mark.asyncio
async def test_set_cookie():
message = {}
CookieMiddleware.set_cookie(message, "Testing-Key", "testing-value")
assert message == {
"headers": [(b"Set-Cookie", b"Testing-Key=testing-value; Path=/; SameSite=lax")]
}
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_sessions():
app = SimpleHttpApp()
communicator = HttpCommunicator(SessionMiddlewareStack(app), "GET", "/test/")
response = await communicator.get_response()
headers = response.get("headers", [])
assert len(headers) == 1
name, value = headers[0]
assert name == b"Set-Cookie"
value = value.decode("utf-8")
assert re.compile(r"sessionid=").search(value) is not None
assert re.compile(r"expires=").search(value) is not None
assert re.compile(r"HttpOnly").search(value) is not None
assert re.compile(r"Max-Age").search(value) is not None
assert re.compile(r"Path").search(value) is not None
samesite = re.compile(r"SameSite=(\w+)").search(value)
assert samesite is not None
assert samesite.group(1) == "Lax"
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_session_samesite(samesite, settings):
app = SimpleHttpApp()
communicator = HttpCommunicator(SessionMiddlewareStack(app), "GET", "/test/")
response = await communicator.get_response()
headers = response.get("headers", [])
assert len(headers) == 1
name, value = headers[0]
assert name == b"Set-Cookie"
value = value.decode("utf-8")
samesite = re.compile(r"SameSite=(\w+)").search(value)
assert samesite is not None
assert samesite.group(1) == settings.SESSION_COOKIE_SAMESITE
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_session_samesite_invalid(samesite_invalid):
app = SimpleHttpApp()
communicator = HttpCommunicator(SessionMiddlewareStack(app), "GET", "/test/")
with pytest.raises(AssertionError):
await communicator.get_response()
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_multiple_sessions():
"""
Create two application instances and test then out of order to verify that
separate scopes are used.
"""
class SimpleHttpApp(AsyncConsumer):
async def http_request(self, event):
await database_sync_to_async(self.scope["session"].save)()
assert self.scope["method"] == "GET"
await self.send(
{"type": "http.response.start", "status": 200, "headers": []}
)
await self.send(
{"type": "http.response.body", "body": self.scope["path"].encode()}
)
app = SessionMiddlewareStack(SimpleHttpApp.as_asgi())
first_communicator = HttpCommunicator(app, "GET", "/first/")
second_communicator = HttpCommunicator(app, "GET", "/second/")
second_response = await second_communicator.get_response()
assert second_response["body"] == b"/second/"
first_response = await first_communicator.get_response()
assert first_response["body"] == b"/first/"
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_session_saves():
"""
Saves information to a session and validates that it actually saves to the backend
"""
class SimpleHttpApp(AsyncConsumer):
@database_sync_to_async
def set_fav_color(self):
self.scope["session"]["fav_color"] = "blue"
async def http_request(self, event):
if django.VERSION >= (5, 1):
await self.scope["session"].aset("fav_color", "blue")
else:
await self.set_fav_color()
await self.send(
{"type": "http.response.start", "status": 200, "headers": []}
)
await self.send(
{
"type": "http.response.body",
"body": self.scope["session"].session_key.encode(),
}
)
app = SessionMiddlewareStack(SimpleHttpApp.as_asgi())
communicator = HttpCommunicator(app, "GET", "/first/")
response = await communicator.get_response()
session_key = response["body"].decode()
SessionStore = import_module(settings.SESSION_ENGINE).SessionStore
session = SessionStore(session_key=session_key)
if django.VERSION >= (5, 1):
session_fav_color = await session.aget("fav_color")
else:
session_fav_color = await database_sync_to_async(session.get)("fav_color")
assert session_fav_color == "blue"
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_session_save_update_error():
"""
Intentionally deletes the session to ensure that SuspiciousOperation is raised
"""
async def inner(scope, receive, send):
send(scope["path"])
class SimpleHttpApp(AsyncConsumer):
@database_sync_to_async
def set_fav_color(self):
self.scope["session"]["fav_color"] = "blue"
async def http_request(self, event):
# Create a session as normal:
await database_sync_to_async(self.scope["session"].save)()
# Then simulate it's deletion from somewhere else:
# (e.g. logging out from another request)
SessionStore = import_module(settings.SESSION_ENGINE).SessionStore
session = SessionStore(session_key=self.scope["session"].session_key)
await database_sync_to_async(session.flush)()
await self.send(
{"type": "http.response.start", "status": 200, "headers": []}
)
app = SessionMiddlewareStack(SimpleHttpApp.as_asgi())
communicator = HttpCommunicator(app, "GET", "/first/")
with pytest.raises(django.core.exceptions.SuspiciousOperation):
await communicator.get_response()
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