Current File : //opt/alt/python35/lib/python3.5/site-packages/sentry_sdk/integrations/wsgi.py
import sys
from sentry_sdk.hub import Hub, _should_send_default_pii
from sentry_sdk.utils import capture_internal_exceptions, event_from_exception
from sentry_sdk._compat import PY2, reraise
from sentry_sdk.integrations._wsgi_common import _filter_headers
if False:
from typing import Callable
from typing import Dict
from typing import List
from typing import Iterator
from typing import Any
from typing import Tuple
from typing import Optional
from sentry_sdk.utils import ExcInfo
if PY2:
def wsgi_decoding_dance(s, charset="utf-8", errors="replace"):
# type: (str, str, str) -> str
return s.decode(charset, errors)
else:
def wsgi_decoding_dance(s, charset="utf-8", errors="replace"):
# type: (str, str, str) -> str
return s.encode("latin1").decode(charset, errors)
def get_host(environ):
# type: (Dict[str, str]) -> str
"""Return the host for the given WSGI environment. Yanked from Werkzeug."""
if environ.get("HTTP_HOST"):
rv = environ["HTTP_HOST"]
if environ["wsgi.url_scheme"] == "http" and rv.endswith(":80"):
rv = rv[:-3]
elif environ["wsgi.url_scheme"] == "https" and rv.endswith(":443"):
rv = rv[:-4]
elif environ.get("SERVER_NAME"):
rv = environ["SERVER_NAME"]
if (environ["wsgi.url_scheme"], environ["SERVER_PORT"]) not in (
("https", "443"),
("http", "80"),
):
rv += ":" + environ["SERVER_PORT"]
else:
# In spite of the WSGI spec, SERVER_NAME might not be present.
rv = "unknown"
return rv
def get_request_url(environ):
# type: (Dict[str, str]) -> str
"""Return the absolute URL without query string for the given WSGI
environment."""
return "%s://%s/%s" % (
environ.get("wsgi.url_scheme"),
get_host(environ),
wsgi_decoding_dance(environ.get("PATH_INFO") or "").lstrip("/"),
)
class SentryWsgiMiddleware(object):
__slots__ = ("app",)
def __init__(self, app):
# type: (Callable) -> None
self.app = app
def __call__(self, environ, start_response):
# type: (Dict[str, str], Callable) -> _ScopedResponse
hub = Hub(Hub.current)
with hub:
with capture_internal_exceptions():
with hub.configure_scope() as scope:
scope.clear_breadcrumbs()
scope._name = "wsgi"
scope.add_event_processor(_make_wsgi_event_processor(environ))
try:
rv = self.app(environ, start_response)
except Exception:
reraise(*_capture_exception(hub))
return _ScopedResponse(hub, rv)
def _get_environ(environ):
# type: (Dict[str, str]) -> Iterator[Tuple[str, str]]
"""
Returns our whitelisted environment variables.
"""
keys = ("SERVER_NAME", "SERVER_PORT")
if _should_send_default_pii():
keys += ("REMOTE_ADDR",) # type: ignore
for key in keys:
if key in environ:
yield key, environ[key]
# `get_headers` comes from `werkzeug.datastructures.EnvironHeaders`
#
# We need this function because Django does not give us a "pure" http header
# dict. So we might as well use it for all WSGI integrations.
def _get_headers(environ):
# type: (Dict[str, str]) -> Iterator[Tuple[str, str]]
"""
Returns only proper HTTP headers.
"""
for key, value in environ.items():
key = str(key)
if key.startswith("HTTP_") and key not in (
"HTTP_CONTENT_TYPE",
"HTTP_CONTENT_LENGTH",
):
yield key[5:].replace("_", "-").title(), value
elif key in ("CONTENT_TYPE", "CONTENT_LENGTH"):
yield key.replace("_", "-").title(), value
def get_client_ip(environ):
# type: (Dict[str, str]) -> Optional[Any]
"""
Naively yank the first IP address in an X-Forwarded-For header
and assume this is correct.
Note: Don't use this in security sensitive situations since this
value may be forged from a client.
"""
try:
return environ["HTTP_X_FORWARDED_FOR"].split(",")[0].strip()
except (KeyError, IndexError):
return environ.get("REMOTE_ADDR")
def _capture_exception(hub):
# type: (Hub) -> ExcInfo
# Check client here as it might have been unset while streaming response
if hub.client is not None:
exc_info = sys.exc_info()
event, hint = event_from_exception(
exc_info,
client_options=hub.client.options,
mechanism={"type": "wsgi", "handled": False},
)
hub.capture_event(event, hint=hint)
return exc_info
class _ScopedResponse(object):
__slots__ = ("_response", "_hub")
def __init__(self, hub, response):
# type: (Hub, List[bytes]) -> None
self._hub = hub
self._response = response
def __iter__(self):
# type: () -> Iterator[bytes]
iterator = iter(self._response)
while True:
with self._hub:
try:
chunk = next(iterator)
except StopIteration:
break
except Exception:
reraise(*_capture_exception(self._hub))
yield chunk
def close(self):
with self._hub:
try:
self._response.close()
except AttributeError:
pass
except Exception:
reraise(*_capture_exception(self._hub))
def _make_wsgi_event_processor(environ):
# type: (Dict[str, str]) -> Callable
# It's a bit unfortunate that we have to extract and parse the request data
# from the environ so eagerly, but there are a few good reasons for this.
#
# We might be in a situation where the scope/hub never gets torn down
# properly. In that case we will have an unnecessary strong reference to
# all objects in the environ (some of which may take a lot of memory) when
# we're really just interested in a few of them.
#
# Keeping the environment around for longer than the request lifecycle is
# also not necessarily something uWSGI can deal with:
# https://github.com/unbit/uwsgi/issues/1950
client_ip = get_client_ip(environ)
request_url = get_request_url(environ)
query_string = environ.get("QUERY_STRING")
method = environ.get("REQUEST_METHOD")
env = dict(_get_environ(environ))
headers = _filter_headers(dict(_get_headers(environ)))
def event_processor(event, hint):
# type: (Dict[str, Any], Dict[str, Any]) -> Dict[str, Any]
with capture_internal_exceptions():
# if the code below fails halfway through we at least have some data
request_info = event.setdefault("request", {})
if _should_send_default_pii():
user_info = event.setdefault("user", {})
user_info["ip_address"] = client_ip
request_info["url"] = request_url
request_info["query_string"] = query_string
request_info["method"] = method
request_info["env"] = env
request_info["headers"] = headers
return event
return event_processor
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