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import asyncio
import functools
from copy import deepcopy
import sentry_sdk
from sentry_sdk._types import TYPE_CHECKING
from sentry_sdk.consts import OP
from sentry_sdk.integrations import DidNotEnable, Integration
from sentry_sdk.integrations._wsgi_common import (
_in_http_status_code_range,
_is_json_content_type,
request_body_within_bounds,
)
from sentry_sdk.integrations.asgi import SentryAsgiMiddleware
from sentry_sdk.scope import should_send_default_pii
from sentry_sdk.tracing import (
SOURCE_FOR_STYLE,
TRANSACTION_SOURCE_COMPONENT,
TRANSACTION_SOURCE_ROUTE,
)
from sentry_sdk.utils import (
AnnotatedValue,
capture_internal_exceptions,
ensure_integration_enabled,
event_from_exception,
logger,
parse_version,
transaction_from_function,
)
if TYPE_CHECKING:
from typing import Any, Awaitable, Callable, Dict, Optional, Tuple
from sentry_sdk._types import Event, HttpStatusCodeRange
try:
import starlette # type: ignore
from starlette import __version__ as STARLETTE_VERSION
from starlette.applications import Starlette # type: ignore
from starlette.datastructures import UploadFile # type: ignore
from starlette.middleware import Middleware # type: ignore
from starlette.middleware.authentication import ( # type: ignore
AuthenticationMiddleware,
)
from starlette.requests import Request # type: ignore
from starlette.routing import Match # type: ignore
from starlette.types import ASGIApp, Receive, Scope as StarletteScope, Send # type: ignore
except ImportError:
raise DidNotEnable("Starlette is not installed")
try:
# Starlette 0.20
from starlette.middleware.exceptions import ExceptionMiddleware # type: ignore
except ImportError:
# Startlette 0.19.1
from starlette.exceptions import ExceptionMiddleware # type: ignore
try:
# Optional dependency of Starlette to parse form data.
import multipart # type: ignore
except ImportError:
multipart = None
_DEFAULT_TRANSACTION_NAME = "generic Starlette request"
TRANSACTION_STYLE_VALUES = ("endpoint", "url")
class StarletteIntegration(Integration):
identifier = "starlette"
origin = f"auto.http.{identifier}"
transaction_style = ""
def __init__(
self,
transaction_style="url",
failed_request_status_codes=None,
middleware_spans=True,
):
# type: (str, Optional[list[HttpStatusCodeRange]], bool) -> None
if transaction_style not in TRANSACTION_STYLE_VALUES:
raise ValueError(
"Invalid value for transaction_style: %s (must be in %s)"
% (transaction_style, TRANSACTION_STYLE_VALUES)
)
self.transaction_style = transaction_style
self.middleware_spans = middleware_spans
self.failed_request_status_codes = failed_request_status_codes or [
range(500, 599)
]
@staticmethod
def setup_once():
# type: () -> None
version = parse_version(STARLETTE_VERSION)
if version is None:
raise DidNotEnable(
"Unparsable Starlette version: {}".format(STARLETTE_VERSION)
)
patch_middlewares()
patch_asgi_app()
patch_request_response()
if version >= (0, 24):
patch_templates()
def _enable_span_for_middleware(middleware_class):
# type: (Any) -> type
old_call = middleware_class.__call__
async def _create_span_call(app, scope, receive, send, **kwargs):
# type: (Any, Dict[str, Any], Callable[[], Awaitable[Dict[str, Any]]], Callable[[Dict[str, Any]], Awaitable[None]], Any) -> None
integration = sentry_sdk.get_client().get_integration(StarletteIntegration)
if integration is None or not integration.middleware_spans:
return await old_call(app, scope, receive, send, **kwargs)
middleware_name = app.__class__.__name__
# Update transaction name with middleware name
name, source = _get_transaction_from_middleware(app, scope, integration)
if name is not None:
sentry_sdk.get_current_scope().set_transaction_name(
name,
source=source,
)
with sentry_sdk.start_span(
op=OP.MIDDLEWARE_STARLETTE,
description=middleware_name,
origin=StarletteIntegration.origin,
) as middleware_span:
middleware_span.set_tag("starlette.middleware_name", middleware_name)
# Creating spans for the "receive" callback
async def _sentry_receive(*args, **kwargs):
# type: (*Any, **Any) -> Any
with sentry_sdk.start_span(
op=OP.MIDDLEWARE_STARLETTE_RECEIVE,
description=getattr(receive, "__qualname__", str(receive)),
origin=StarletteIntegration.origin,
) as span:
span.set_tag("starlette.middleware_name", middleware_name)
return await receive(*args, **kwargs)
receive_name = getattr(receive, "__name__", str(receive))
receive_patched = receive_name == "_sentry_receive"
new_receive = _sentry_receive if not receive_patched else receive
# Creating spans for the "send" callback
async def _sentry_send(*args, **kwargs):
# type: (*Any, **Any) -> Any
with sentry_sdk.start_span(
op=OP.MIDDLEWARE_STARLETTE_SEND,
description=getattr(send, "__qualname__", str(send)),
origin=StarletteIntegration.origin,
) as span:
span.set_tag("starlette.middleware_name", middleware_name)
return await send(*args, **kwargs)
send_name = getattr(send, "__name__", str(send))
send_patched = send_name == "_sentry_send"
new_send = _sentry_send if not send_patched else send
return await old_call(app, scope, new_receive, new_send, **kwargs)
not_yet_patched = old_call.__name__ not in [
"_create_span_call",
"_sentry_authenticationmiddleware_call",
"_sentry_exceptionmiddleware_call",
]
if not_yet_patched:
middleware_class.__call__ = _create_span_call
return middleware_class
@ensure_integration_enabled(StarletteIntegration)
def _capture_exception(exception, handled=False):
# type: (BaseException, **Any) -> None
event, hint = event_from_exception(
exception,
client_options=sentry_sdk.get_client().options,
mechanism={"type": StarletteIntegration.identifier, "handled": handled},
)
sentry_sdk.capture_event(event, hint=hint)
def patch_exception_middleware(middleware_class):
# type: (Any) -> None
"""
Capture all exceptions in Starlette app and
also extract user information.
"""
old_middleware_init = middleware_class.__init__
not_yet_patched = "_sentry_middleware_init" not in str(old_middleware_init)
if not_yet_patched:
def _sentry_middleware_init(self, *args, **kwargs):
# type: (Any, Any, Any) -> None
old_middleware_init(self, *args, **kwargs)
# Patch existing exception handlers
old_handlers = self._exception_handlers.copy()
async def _sentry_patched_exception_handler(self, *args, **kwargs):
# type: (Any, Any, Any) -> None
integration = sentry_sdk.get_client().get_integration(
StarletteIntegration
)
exp = args[0]
is_http_server_error = (
hasattr(exp, "status_code")
and isinstance(exp.status_code, int)
and _in_http_status_code_range(
exp.status_code, integration.failed_request_status_codes
)
)
if is_http_server_error:
_capture_exception(exp, handled=True)
# Find a matching handler
old_handler = None
for cls in type(exp).__mro__:
if cls in old_handlers:
old_handler = old_handlers[cls]
break
if old_handler is None:
return
if _is_async_callable(old_handler):
return await old_handler(self, *args, **kwargs)
else:
return old_handler(self, *args, **kwargs)
for key in self._exception_handlers.keys():
self._exception_handlers[key] = _sentry_patched_exception_handler
middleware_class.__init__ = _sentry_middleware_init
old_call = middleware_class.__call__
async def _sentry_exceptionmiddleware_call(self, scope, receive, send):
# type: (Dict[str, Any], Dict[str, Any], Callable[[], Awaitable[Dict[str, Any]]], Callable[[Dict[str, Any]], Awaitable[None]]) -> None
# Also add the user (that was eventually set by be Authentication middle
# that was called before this middleware). This is done because the authentication
# middleware sets the user in the scope and then (in the same function)
# calls this exception middelware. In case there is no exception (or no handler
# for the type of exception occuring) then the exception bubbles up and setting the
# user information into the sentry scope is done in auth middleware and the
# ASGI middleware will then send everything to Sentry and this is fine.
# But if there is an exception happening that the exception middleware here
# has a handler for, it will send the exception directly to Sentry, so we need
# the user information right now.
# This is why we do it here.
_add_user_to_sentry_scope(scope)
await old_call(self, scope, receive, send)
middleware_class.__call__ = _sentry_exceptionmiddleware_call
@ensure_integration_enabled(StarletteIntegration)
def _add_user_to_sentry_scope(scope):
# type: (Dict[str, Any]) -> None
"""
Extracts user information from the ASGI scope and
adds it to Sentry's scope.
"""
if "user" not in scope:
return
if not should_send_default_pii():
return
user_info = {} # type: Dict[str, Any]
starlette_user = scope["user"]
username = getattr(starlette_user, "username", None)
if username:
user_info.setdefault("username", starlette_user.username)
user_id = getattr(starlette_user, "id", None)
if user_id:
user_info.setdefault("id", starlette_user.id)
email = getattr(starlette_user, "email", None)
if email:
user_info.setdefault("email", starlette_user.email)
sentry_scope = sentry_sdk.get_isolation_scope()
sentry_scope.user = user_info
def patch_authentication_middleware(middleware_class):
# type: (Any) -> None
"""
Add user information to Sentry scope.
"""
old_call = middleware_class.__call__
not_yet_patched = "_sentry_authenticationmiddleware_call" not in str(old_call)
if not_yet_patched:
async def _sentry_authenticationmiddleware_call(self, scope, receive, send):
# type: (Dict[str, Any], Dict[str, Any], Callable[[], Awaitable[Dict[str, Any]]], Callable[[Dict[str, Any]], Awaitable[None]]) -> None
await old_call(self, scope, receive, send)
_add_user_to_sentry_scope(scope)
middleware_class.__call__ = _sentry_authenticationmiddleware_call
def patch_middlewares():
# type: () -> None
"""
Patches Starlettes `Middleware` class to record
spans for every middleware invoked.
"""
old_middleware_init = Middleware.__init__
not_yet_patched = "_sentry_middleware_init" not in str(old_middleware_init)
if not_yet_patched:
def _sentry_middleware_init(self, cls, **options):
# type: (Any, Any, Any) -> None
if cls == SentryAsgiMiddleware:
return old_middleware_init(self, cls, **options)
span_enabled_cls = _enable_span_for_middleware(cls)
old_middleware_init(self, span_enabled_cls, **options)
if cls == AuthenticationMiddleware:
patch_authentication_middleware(cls)
if cls == ExceptionMiddleware:
patch_exception_middleware(cls)
Middleware.__init__ = _sentry_middleware_init
def patch_asgi_app():
# type: () -> None
"""
Instrument Starlette ASGI app using the SentryAsgiMiddleware.
"""
old_app = Starlette.__call__
async def _sentry_patched_asgi_app(self, scope, receive, send):
# type: (Starlette, StarletteScope, Receive, Send) -> None
integration = sentry_sdk.get_client().get_integration(StarletteIntegration)
if integration is None:
return await old_app(self, scope, receive, send)
middleware = SentryAsgiMiddleware(
lambda *a, **kw: old_app(self, *a, **kw),
mechanism_type=StarletteIntegration.identifier,
transaction_style=integration.transaction_style,
span_origin=StarletteIntegration.origin,
)
middleware.__call__ = middleware._run_asgi3
return await middleware(scope, receive, send)
Starlette.__call__ = _sentry_patched_asgi_app
# This was vendored in from Starlette to support Starlette 0.19.1 because
# this function was only introduced in 0.20.x
def _is_async_callable(obj):
# type: (Any) -> bool
while isinstance(obj, functools.partial):
obj = obj.func
return asyncio.iscoroutinefunction(obj) or (
callable(obj) and asyncio.iscoroutinefunction(obj.__call__)
)
def patch_request_response():
# type: () -> None
old_request_response = starlette.routing.request_response
def _sentry_request_response(func):
# type: (Callable[[Any], Any]) -> ASGIApp
old_func = func
is_coroutine = _is_async_callable(old_func)
if is_coroutine:
async def _sentry_async_func(*args, **kwargs):
# type: (*Any, **Any) -> Any
integration = sentry_sdk.get_client().get_integration(
StarletteIntegration
)
if integration is None:
return await old_func(*args, **kwargs)
request = args[0]
_set_transaction_name_and_source(
sentry_sdk.get_current_scope(),
integration.transaction_style,
request,
)
sentry_scope = sentry_sdk.get_isolation_scope()
extractor = StarletteRequestExtractor(request)
info = await extractor.extract_request_info()
def _make_request_event_processor(req, integration):
# type: (Any, Any) -> Callable[[Event, dict[str, Any]], Event]
def event_processor(event, hint):
# type: (Event, Dict[str, Any]) -> Event
# Add info from request to event
request_info = event.get("request", {})
if info:
if "cookies" in info:
request_info["cookies"] = info["cookies"]
if "data" in info:
request_info["data"] = info["data"]
event["request"] = deepcopy(request_info)
return event
return event_processor
sentry_scope._name = StarletteIntegration.identifier
sentry_scope.add_event_processor(
_make_request_event_processor(request, integration)
)
return await old_func(*args, **kwargs)
func = _sentry_async_func
else:
@ensure_integration_enabled(StarletteIntegration, old_func)
def _sentry_sync_func(*args, **kwargs):
# type: (*Any, **Any) -> Any
integration = sentry_sdk.get_client().get_integration(
StarletteIntegration
)
sentry_scope = sentry_sdk.get_isolation_scope()
if sentry_scope.profile is not None:
sentry_scope.profile.update_active_thread_id()
request = args[0]
_set_transaction_name_and_source(
sentry_scope, integration.transaction_style, request
)
extractor = StarletteRequestExtractor(request)
cookies = extractor.extract_cookies_from_request()
def _make_request_event_processor(req, integration):
# type: (Any, Any) -> Callable[[Event, dict[str, Any]], Event]
def event_processor(event, hint):
# type: (Event, dict[str, Any]) -> Event
# Extract information from request
request_info = event.get("request", {})
if cookies:
request_info["cookies"] = cookies
event["request"] = deepcopy(request_info)
return event
return event_processor
sentry_scope._name = StarletteIntegration.identifier
sentry_scope.add_event_processor(
_make_request_event_processor(request, integration)
)
return old_func(*args, **kwargs)
func = _sentry_sync_func
return old_request_response(func)
starlette.routing.request_response = _sentry_request_response
def patch_templates():
# type: () -> None
# If markupsafe is not installed, then Jinja2 is not installed
# (markupsafe is a dependency of Jinja2)
# In this case we do not need to patch the Jinja2Templates class
try:
from markupsafe import Markup
except ImportError:
return # Nothing to do
from starlette.templating import Jinja2Templates # type: ignore
old_jinja2templates_init = Jinja2Templates.__init__
not_yet_patched = "_sentry_jinja2templates_init" not in str(
old_jinja2templates_init
)
if not_yet_patched:
def _sentry_jinja2templates_init(self, *args, **kwargs):
# type: (Jinja2Templates, *Any, **Any) -> None
def add_sentry_trace_meta(request):
# type: (Request) -> Dict[str, Any]
trace_meta = Markup(
sentry_sdk.get_current_scope().trace_propagation_meta()
)
return {
"sentry_trace_meta": trace_meta,
}
kwargs.setdefault("context_processors", [])
if add_sentry_trace_meta not in kwargs["context_processors"]:
kwargs["context_processors"].append(add_sentry_trace_meta)
return old_jinja2templates_init(self, *args, **kwargs)
Jinja2Templates.__init__ = _sentry_jinja2templates_init
class StarletteRequestExtractor:
"""
Extracts useful information from the Starlette request
(like form data or cookies) and adds it to the Sentry event.
"""
request = None # type: Request
def __init__(self, request):
# type: (StarletteRequestExtractor, Request) -> None
self.request = request
def extract_cookies_from_request(self):
# type: (StarletteRequestExtractor) -> Optional[Dict[str, Any]]
cookies = None # type: Optional[Dict[str, Any]]
if should_send_default_pii():
cookies = self.cookies()
return cookies
async def extract_request_info(self):
# type: (StarletteRequestExtractor) -> Optional[Dict[str, Any]]
client = sentry_sdk.get_client()
request_info = {} # type: Dict[str, Any]
with capture_internal_exceptions():
# Add cookies
if should_send_default_pii():
request_info["cookies"] = self.cookies()
# If there is no body, just return the cookies
content_length = await self.content_length()
if not content_length:
return request_info
# Add annotation if body is too big
if content_length and not request_body_within_bounds(
client, content_length
):
request_info["data"] = AnnotatedValue.removed_because_over_size_limit()
return request_info
# Add JSON body, if it is a JSON request
json = await self.json()
if json:
request_info["data"] = json
return request_info
# Add form as key/value pairs, if request has form data
form = await self.form()
if form:
form_data = {}
for key, val in form.items():
is_file = isinstance(val, UploadFile)
form_data[key] = (
val
if not is_file
else AnnotatedValue.removed_because_raw_data()
)
request_info["data"] = form_data
return request_info
# Raw data, do not add body just an annotation
request_info["data"] = AnnotatedValue.removed_because_raw_data()
return request_info
async def content_length(self):
# type: (StarletteRequestExtractor) -> Optional[int]
if "content-length" in self.request.headers:
return int(self.request.headers["content-length"])
return None
def cookies(self):
# type: (StarletteRequestExtractor) -> Dict[str, Any]
return self.request.cookies
async def form(self):
# type: (StarletteRequestExtractor) -> Any
if multipart is None:
return None
# Parse the body first to get it cached, as Starlette does not cache form() as it
# does with body() and json() https://github.com/encode/starlette/discussions/1933
# Calling `.form()` without calling `.body()` first will
# potentially break the users project.
await self.request.body()
return await self.request.form()
def is_json(self):
# type: (StarletteRequestExtractor) -> bool
return _is_json_content_type(self.request.headers.get("content-type"))
async def json(self):
# type: (StarletteRequestExtractor) -> Optional[Dict[str, Any]]
if not self.is_json():
return None
return await self.request.json()
def _transaction_name_from_router(scope):
# type: (StarletteScope) -> Optional[str]
router = scope.get("router")
if not router:
return None
for route in router.routes:
match = route.matches(scope)
if match[0] == Match.FULL:
return route.path
return None
def _set_transaction_name_and_source(scope, transaction_style, request):
# type: (sentry_sdk.Scope, str, Any) -> None
name = None
source = SOURCE_FOR_STYLE[transaction_style]
if transaction_style == "endpoint":
endpoint = request.scope.get("endpoint")
if endpoint:
name = transaction_from_function(endpoint) or None
elif transaction_style == "url":
name = _transaction_name_from_router(request.scope)
if name is None:
name = _DEFAULT_TRANSACTION_NAME
source = TRANSACTION_SOURCE_ROUTE
scope.set_transaction_name(name, source=source)
logger.debug(
"[Starlette] Set transaction name and source on scope: %s / %s", name, source
)
def _get_transaction_from_middleware(app, asgi_scope, integration):
# type: (Any, Dict[str, Any], StarletteIntegration) -> Tuple[Optional[str], Optional[str]]
name = None
source = None
if integration.transaction_style == "endpoint":
name = transaction_from_function(app.__class__)
source = TRANSACTION_SOURCE_COMPONENT
elif integration.transaction_style == "url":
name = _transaction_name_from_router(asgi_scope)
source = TRANSACTION_SOURCE_ROUTE
return name, source
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