134 lines
4.2 KiB
Python
134 lines
4.2 KiB
Python
"""
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ASGI config for passbook project.
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It exposes the ASGI callable as a module-level variable named ``application``.
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For more information on this file, see
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https://docs.djangoproject.com/en/3.0/howto/deployment/asgi/
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"""
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import os
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import typing
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from time import time
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from typing import Any, ByteString, Dict
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import django
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from asgiref.compatibility import guarantee_single_callable
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from defusedxml import defuse_stdlib
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from django.core.asgi import get_asgi_application
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from sentry_sdk.integrations.asgi import SentryAsgiMiddleware
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from structlog import get_logger
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os.environ.setdefault("DJANGO_SETTINGS_MODULE", "passbook.root.settings")
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defuse_stdlib()
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django.setup()
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# See https://github.com/encode/starlette/blob/master/starlette/types.py
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Scope = typing.MutableMapping[str, typing.Any]
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Message = typing.MutableMapping[str, typing.Any]
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Receive = typing.Callable[[], typing.Awaitable[Message]]
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Send = typing.Callable[[Message], typing.Awaitable[None]]
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ASGIApp = typing.Callable[[Scope, Receive, Send], typing.Awaitable[None]]
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ASGI_IP_HEADERS = (
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b"x-forwarded-for",
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b"x-real-ip",
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)
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LOGGER = get_logger("passbook.asgi")
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class ASGILoggerMiddleware:
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"""Main ASGI Logger middleware, starts an ASGILogger for each request"""
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def __init__(self, app: ASGIApp) -> None:
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self.app = app
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async def __call__(self, scope: Scope, receive: Receive, send: Send):
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responder = ASGILogger(self.app)
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await responder(scope, receive, send)
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return
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class ASGILogger:
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"""ASGI Logger, instantiated for each request"""
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app: ASGIApp
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scope: Scope
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headers: Dict[ByteString, Any]
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status_code: int
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start: float
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content_length: int
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def __init__(self, app: ASGIApp):
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self.app = app
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async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
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self.scope = scope
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self.content_length = 0
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self.headers = dict(scope.get("headers", []))
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async def send_hooked(message: Message) -> None:
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"""Hooked send method, which records status code and content-length, and for the final
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requests logs it"""
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headers = dict(message.get("headers", []))
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if "status" in message:
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self.status_code = message["status"]
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if b"Content-Length" in headers:
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self.content_length += int(headers.get(b"Content-Length", b"0"))
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if message["type"] == "http.response.body" and not message["more_body"]:
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runtime = int((time() - self.start) * 10 ** 6)
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self.log(runtime)
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await send(message)
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if self.headers.get(b"host", b"") == b"passbook-healthcheck-host":
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# Don't log healthcheck/readiness requests
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await send({"type": "http.response.start", "status": 204, "headers": []})
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await send({"type": "http.response.body", "body": ""})
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return
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self.start = time()
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if scope["type"] == "lifespan":
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# https://code.djangoproject.com/ticket/31508
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# https://github.com/encode/uvicorn/issues/266
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return
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await self.app(scope, receive, send_hooked)
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def _get_ip(self) -> str:
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client_ip = None
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for header in ASGI_IP_HEADERS:
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if header in self.headers:
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client_ip = self.headers[header].decode()
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if not client_ip:
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client_ip, _ = self.scope.get("client", ("", 0))
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# Check if header has multiple values, and use the first one
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return client_ip.split(", ")[0]
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def log(self, runtime: float):
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"""Outpot access logs in a structured format"""
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host = self._get_ip()
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query_string = ""
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if self.scope.get("query_string", b"") != b"":
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query_string = f"?{self.scope.get('query_string').decode()}"
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LOGGER.info(
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f"{self.scope.get('path', '')}{query_string}",
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host=host,
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method=self.scope.get("method", ""),
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scheme=self.scope.get("scheme", ""),
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status=self.status_code,
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size=self.content_length / 1000 if self.content_length > 0 else "-",
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runtime=runtime,
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)
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application = ASGILogger(
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guarantee_single_callable(SentryAsgiMiddleware(get_asgi_application()))
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)
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