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from __future__ import absolute_import
import weakref
from sentry_sdk.hub import Hub, _should_send_default_pii
from sentry_sdk.utils import capture_internal_exceptions, event_from_exception
from sentry_sdk.integrations import Integration, DidNotEnable
from sentry_sdk.integrations.wsgi import SentryWsgiMiddleware
from sentry_sdk.integrations._wsgi_common import RequestExtractor
from sentry_sdk._types import MYPY
if MYPY:
from sentry_sdk.integrations.wsgi import _ScopedResponse
from typing import Any
from typing import Dict
from werkzeug.datastructures import ImmutableTypeConversionDict
from werkzeug.datastructures import ImmutableMultiDict
from werkzeug.datastructures import FileStorage
from typing import Union
from typing import Callable
from sentry_sdk._types import EventProcessor
try:
import flask_login # type: ignore
except ImportError:
flask_login = None
try:
from flask import ( # type: ignore
Request,
Flask,
_request_ctx_stack,
_app_ctx_stack,
__version__ as FLASK_VERSION,
)
from flask.signals import (
got_request_exception,
request_started,
)
except ImportError:
raise DidNotEnable("Flask is not installed")
try:
import blinker # noqa
except ImportError:
raise DidNotEnable("blinker is not installed")
TRANSACTION_STYLE_VALUES = ("endpoint", "url")
class FlaskIntegration(Integration):
identifier = "flask"
transaction_style = None
def __init__(self, transaction_style="endpoint"):
# type: (str) -> 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
@staticmethod
def setup_once():
# type: () -> None
try:
version = tuple(map(int, FLASK_VERSION.split(".")[:3]))
except (ValueError, TypeError):
raise DidNotEnable("Unparsable Flask version: {}".format(FLASK_VERSION))
if version < (0, 10):
raise DidNotEnable("Flask 0.10 or newer is required.")
request_started.connect(_request_started)
got_request_exception.connect(_capture_exception)
old_app = Flask.__call__
def sentry_patched_wsgi_app(self, environ, start_response):
# type: (Any, Dict[str, str], Callable[..., Any]) -> _ScopedResponse
if Hub.current.get_integration(FlaskIntegration) is None:
return old_app(self, environ, start_response)
return SentryWsgiMiddleware(lambda *a, **kw: old_app(self, *a, **kw))(
environ, start_response
)
Flask.__call__ = sentry_patched_wsgi_app # type: ignore
def _request_started(sender, **kwargs):
# type: (Flask, **Any) -> None
hub = Hub.current
integration = hub.get_integration(FlaskIntegration)
if integration is None:
return
app = _app_ctx_stack.top.app
with hub.configure_scope() as scope:
request = _request_ctx_stack.top.request
# Set the transaction name here, but rely on WSGI middleware to actually
# start the transaction
try:
if integration.transaction_style == "endpoint":
scope.transaction = request.url_rule.endpoint
elif integration.transaction_style == "url":
scope.transaction = request.url_rule.rule
except Exception:
pass
weak_request = weakref.ref(request)
evt_processor = _make_request_event_processor(
app, weak_request, integration # type: ignore
)
scope.add_event_processor(evt_processor)
class FlaskRequestExtractor(RequestExtractor):
def env(self):
# type: () -> Dict[str, str]
return self.request.environ
def cookies(self):
# type: () -> ImmutableTypeConversionDict[Any, Any]
return self.request.cookies
def raw_data(self):
# type: () -> bytes
return self.request.get_data()
def form(self):
# type: () -> ImmutableMultiDict[str, Any]
return self.request.form
def files(self):
# type: () -> ImmutableMultiDict[str, Any]
return self.request.files
def is_json(self):
# type: () -> bool
return self.request.is_json
def json(self):
# type: () -> Any
return self.request.get_json()
def size_of_file(self, file):
# type: (FileStorage) -> int
return file.content_length
def _make_request_event_processor(app, weak_request, integration):
# type: (Flask, Callable[[], Request], FlaskIntegration) -> EventProcessor
def inner(event, hint):
# type: (Dict[str, Any], Dict[str, Any]) -> Dict[str, Any]
request = weak_request()
# if the request is gone we are fine not logging the data from
# it. This might happen if the processor is pushed away to
# another thread.
if request is None:
return event
with capture_internal_exceptions():
FlaskRequestExtractor(request).extract_into_event(event)
if _should_send_default_pii():
with capture_internal_exceptions():
_add_user_to_event(event)
return event
return inner
def _capture_exception(sender, exception, **kwargs):
# type: (Flask, Union[ValueError, BaseException], **Any) -> None
hub = Hub.current
if hub.get_integration(FlaskIntegration) is None:
return
# If an integration is there, a client has to be there.
client = hub.client # type: Any
event, hint = event_from_exception(
exception,
client_options=client.options,
mechanism={"type": "flask", "handled": False},
)
hub.capture_event(event, hint=hint)
def _add_user_to_event(event):
# type: (Dict[str, Any]) -> None
if flask_login is None:
return
user = flask_login.current_user
if user is None:
return
with capture_internal_exceptions():
# Access this object as late as possible as accessing the user
# is relatively costly
user_info = event.setdefault("user", {})
try:
user_info.setdefault("id", user.get_id())
# TODO: more configurable user attrs here
except AttributeError:
# might happen if:
# - flask_login could not be imported
# - flask_login is not configured
# - no user is logged in
pass
# The following attribute accesses are ineffective for the general
# Flask-Login case, because the User interface of Flask-Login does not
# care about anything but the ID. However, Flask-User (based on
# Flask-Login) documents a few optional extra attributes.
#
# https://github.com/lingthio/Flask-User/blob/a379fa0a281789618c484b459cb41236779b95b1/docs/source/data_models.rst#fixed-data-model-property-names
try:
user_info.setdefault("email", user.email)
except Exception:
pass
try:
user_info.setdefault("username", user.username)
user_info.setdefault("username", user.email)
except Exception:
pass