Current File : //opt/alt/python37/lib/python3.7/site-packages/sentry_sdk/integrations/asgi.py
"""
An ASGI middleware.
Based on Tom Christie's `sentry-asgi <https://github.com/encode/sentry-asgi>`_.
"""
import asyncio
import inspect
import urllib
from sentry_sdk._functools import partial
from sentry_sdk._types import MYPY
from sentry_sdk.hub import Hub, _should_send_default_pii
from sentry_sdk.integrations._wsgi_common import _filter_headers
from sentry_sdk.utils import (
ContextVar,
event_from_exception,
transaction_from_function,
HAS_REAL_CONTEXTVARS,
CONTEXTVARS_ERROR_MESSAGE,
)
from sentry_sdk.tracing import Transaction
if MYPY:
from typing import Dict
from typing import Any
from typing import Optional
from typing import Callable
from typing_extensions import Literal
from sentry_sdk._types import Event, Hint
_asgi_middleware_applied = ContextVar("sentry_asgi_middleware_applied")
_DEFAULT_TRANSACTION_NAME = "generic ASGI request"
def _capture_exception(hub, exc):
# type: (Hub, Any) -> None
# Check client here as it might have been unset while streaming response
if hub.client is not None:
event, hint = event_from_exception(
exc,
client_options=hub.client.options,
mechanism={"type": "asgi", "handled": False},
)
hub.capture_event(event, hint=hint)
def _looks_like_asgi3(app):
# type: (Any) -> bool
"""
Try to figure out if an application object supports ASGI3.
This is how uvicorn figures out the application version as well.
"""
if inspect.isclass(app):
return hasattr(app, "__await__")
elif inspect.isfunction(app):
return asyncio.iscoroutinefunction(app)
else:
call = getattr(app, "__call__", None) # noqa
return asyncio.iscoroutinefunction(call)
class SentryAsgiMiddleware:
__slots__ = ("app", "__call__")
def __init__(self, app, unsafe_context_data=False):
# type: (Any, bool) -> None
"""
Instrument an ASGI application with Sentry. Provides HTTP/websocket
data to sent events and basic handling for exceptions bubbling up
through the middleware.
:param unsafe_context_data: Disable errors when a proper contextvars installation could not be found. We do not recommend changing this from the default.
"""
if not unsafe_context_data and not HAS_REAL_CONTEXTVARS:
# We better have contextvars or we're going to leak state between
# requests.
raise RuntimeError(
"The ASGI middleware for Sentry requires Python 3.7+ "
"or the aiocontextvars package." + CONTEXTVARS_ERROR_MESSAGE
)
self.app = app
if _looks_like_asgi3(app):
self.__call__ = self._run_asgi3 # type: Callable[..., Any]
else:
self.__call__ = self._run_asgi2
def _run_asgi2(self, scope):
# type: (Any) -> Any
async def inner(receive, send):
# type: (Any, Any) -> Any
return await self._run_app(scope, lambda: self.app(scope)(receive, send))
return inner
async def _run_asgi3(self, scope, receive, send):
# type: (Any, Any, Any) -> Any
return await self._run_app(scope, lambda: self.app(scope, receive, send))
async def _run_app(self, scope, callback):
# type: (Any, Any) -> Any
is_recursive_asgi_middleware = _asgi_middleware_applied.get(False)
if is_recursive_asgi_middleware:
try:
return await callback()
except Exception as exc:
_capture_exception(Hub.current, exc)
raise exc from None
_asgi_middleware_applied.set(True)
try:
hub = Hub(Hub.current)
with hub:
with hub.configure_scope() as sentry_scope:
sentry_scope.clear_breadcrumbs()
sentry_scope._name = "asgi"
processor = partial(self.event_processor, asgi_scope=scope)
sentry_scope.add_event_processor(processor)
ty = scope["type"]
if ty in ("http", "websocket"):
transaction = Transaction.continue_from_headers(
dict(scope["headers"]),
op="{}.server".format(ty),
)
else:
transaction = Transaction(op="asgi.server")
transaction.name = _DEFAULT_TRANSACTION_NAME
transaction.set_tag("asgi.type", ty)
with hub.start_transaction(
transaction, custom_sampling_context={"asgi_scope": scope}
):
# XXX: Would be cool to have correct span status, but we
# would have to wrap send(). That is a bit hard to do with
# the current abstraction over ASGI 2/3.
try:
return await callback()
except Exception as exc:
_capture_exception(hub, exc)
raise exc from None
finally:
_asgi_middleware_applied.set(False)
def event_processor(self, event, hint, asgi_scope):
# type: (Event, Hint, Any) -> Optional[Event]
request_info = event.get("request", {})
ty = asgi_scope["type"]
if ty in ("http", "websocket"):
request_info["method"] = asgi_scope.get("method")
request_info["headers"] = headers = _filter_headers(
self._get_headers(asgi_scope)
)
request_info["query_string"] = self._get_query(asgi_scope)
request_info["url"] = self._get_url(
asgi_scope, "http" if ty == "http" else "ws", headers.get("host")
)
client = asgi_scope.get("client")
if client and _should_send_default_pii():
request_info["env"] = {"REMOTE_ADDR": client[0]}
if (
event.get("transaction", _DEFAULT_TRANSACTION_NAME)
== _DEFAULT_TRANSACTION_NAME
):
endpoint = asgi_scope.get("endpoint")
# Webframeworks like Starlette mutate the ASGI env once routing is
# done, which is sometime after the request has started. If we have
# an endpoint, overwrite our generic transaction name.
if endpoint:
event["transaction"] = transaction_from_function(endpoint)
event["request"] = request_info
return event
# Helper functions for extracting request data.
#
# Note: Those functions are not public API. If you want to mutate request
# data to your liking it's recommended to use the `before_send` callback
# for that.
def _get_url(self, scope, default_scheme, host):
# type: (Dict[str, Any], Literal["ws", "http"], Optional[str]) -> str
"""
Extract URL from the ASGI scope, without also including the querystring.
"""
scheme = scope.get("scheme", default_scheme)
server = scope.get("server", None)
path = scope.get("root_path", "") + scope.get("path", "")
if host:
return "%s://%s%s" % (scheme, host, path)
if server is not None:
host, port = server
default_port = {"http": 80, "https": 443, "ws": 80, "wss": 443}[scheme]
if port != default_port:
return "%s://%s:%s%s" % (scheme, host, port, path)
return "%s://%s%s" % (scheme, host, path)
return path
def _get_query(self, scope):
# type: (Any) -> Any
"""
Extract querystring from the ASGI scope, in the format that the Sentry protocol expects.
"""
qs = scope.get("query_string")
if not qs:
return None
return urllib.parse.unquote(qs.decode("latin-1"))
def _get_headers(self, scope):
# type: (Any) -> Dict[str, str]
"""
Extract headers from the ASGI scope, in the format that the Sentry protocol expects.
"""
headers = {} # type: Dict[str, str]
for raw_key, raw_value in scope["headers"]:
key = raw_key.decode("latin-1")
value = raw_value.decode("latin-1")
if key in headers:
headers[key] = headers[key] + ", " + value
else:
headers[key] = value
return headers
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