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import re
import uuid
import contextlib
import time
import itertools
import platform
from datetime import datetime, timedelta
import sentry_sdk
from sentry_sdk.utils import capture_internal_exceptions, logger, to_string
from sentry_sdk._compat import PY2
from sentry_sdk._types import MYPY
if PY2:
from collections import Mapping
else:
from collections.abc import Mapping
if MYPY:
import typing
from typing import Generator
from typing import Optional
from typing import Any
from typing import Dict
from typing import List
from typing import Tuple
from typing import Iterator
_traceparent_header_format_re = re.compile(
"^[ \t]*" # whitespace
"([0-9a-f]{32})?" # trace_id
"-?([0-9a-f]{16})?" # span_id
"-?([01])?" # sampled
"[ \t]*$" # whitespace
)
_ITERTOOLS_COUNT_IS_ATOMIC = platform.python_implementation() in ("CPython", "PyPy")
class EnvironHeaders(Mapping): # type: ignore
def __init__(
self,
environ, # type: typing.Mapping[str, str]
prefix="HTTP_", # type: str
):
# type: (...) -> None
self.environ = environ
self.prefix = prefix
def __getitem__(self, key):
# type: (str) -> Optional[Any]
return self.environ[self.prefix + key.replace("-", "_").upper()]
def __len__(self):
# type: () -> int
return sum(1 for _ in iter(self))
def __iter__(self):
# type: () -> Generator[str, None, None]
for k in self.environ:
if not isinstance(k, str):
continue
k = k.replace("-", "_").upper()
if not k.startswith(self.prefix):
continue
yield k[len(self.prefix) :]
class _SpanRecorder(object):
"""Limits the number of spans recorded in a transaction."""
__slots__ = ("maxlen", "spans")
def __init__(self, maxlen):
# type: (int) -> None
# FIXME: this is `maxlen - 1` only to preserve historical behavior
# enforced by tests.
# Either this should be changed to `maxlen` or the JS SDK implementation
# should be changed to match a consistent interpretation of what maxlen
# limits: either transaction+spans or only child spans.
self.maxlen = maxlen - 1
self.spans = [] # type: List[Span]
def add(self, span):
# type: (Span) -> None
if len(self.spans) > self.maxlen:
span._span_recorder = None
else:
self.spans.append(span)
class Span(object):
__slots__ = (
"trace_id",
"span_id",
"parent_span_id",
"same_process_as_parent",
"sampled",
"op",
"description",
"start_timestamp",
"_start_timestamp_monotonic",
"status",
"timestamp",
"_tags",
"_data",
"_span_recorder",
"hub",
"_context_manager_state",
"_span_id_generator",
)
def __new__(cls, **kwargs):
# type: (**Any) -> Any
# TODO: consider removing this in a future release.
# This is for backwards compatibility with releases before Transaction
# existed, to allow for a smoother transition.
if "transaction" in kwargs:
return object.__new__(Transaction)
return object.__new__(cls)
def __init__(
self,
trace_id=None, # type: Optional[str]
span_id=None, # type: Optional[str]
parent_span_id=None, # type: Optional[str]
same_process_as_parent=True, # type: bool
sampled=None, # type: Optional[bool]
op=None, # type: Optional[str]
description=None, # type: Optional[str]
hub=None, # type: Optional[sentry_sdk.Hub]
status=None, # type: Optional[str]
transaction=None, # type: Optional[str] # deprecated
_span_id_generator=None, # type: Optional[Iterator[str]]
):
# type: (...) -> None
self.trace_id = trace_id or uuid.uuid4().hex
if not span_id and _span_id_generator:
span_id = "{:016x}".format(
int(self.trace_id, 16) + next(_span_id_generator)
)
if not span_id:
span_id = uuid.uuid4().hex[16:]
self.span_id = span_id
self._span_id_generator = _span_id_generator
self.parent_span_id = parent_span_id
self.same_process_as_parent = same_process_as_parent
self.sampled = sampled
self.op = op
self.description = description
self.status = status
self.hub = hub
self._tags = {} # type: Dict[str, str]
self._data = {} # type: Dict[str, Any]
self.start_timestamp = datetime.utcnow()
try:
# TODO: For Python 3.7+, we could use a clock with ns resolution:
# self._start_timestamp_monotonic = time.perf_counter_ns()
# Python 3.3+
self._start_timestamp_monotonic = time.perf_counter()
except AttributeError:
pass
#: End timestamp of span
self.timestamp = None # type: Optional[datetime]
self._span_recorder = None # type: Optional[_SpanRecorder]
def init_span_recorder(self, maxlen):
# type: (int) -> None
if self._span_recorder is None:
self._span_recorder = _SpanRecorder(maxlen)
self._span_recorder.add(self)
def __repr__(self):
# type: () -> str
return "<%s(trace_id=%r, span_id=%r, parent_span_id=%r, sampled=%r)>" % (
self.__class__.__name__,
self.trace_id,
self.span_id,
self.parent_span_id,
self.sampled,
)
def __enter__(self):
# type: () -> Span
hub = self.hub or sentry_sdk.Hub.current
_, scope = hub._stack[-1]
old_span = scope.span
scope.span = self
self._context_manager_state = (hub, scope, old_span)
return self
def __exit__(self, ty, value, tb):
# type: (Optional[Any], Optional[Any], Optional[Any]) -> None
if value is not None:
self.set_status("internal_error")
hub, scope, old_span = self._context_manager_state
del self._context_manager_state
self.finish(hub)
scope.span = old_span
def start_child(self, **kwargs):
# type: (**Any) -> Span
"""
Start a sub-span from the current span or transaction.
Takes the same arguments as the initializer of :py:class:`Span`. No
attributes other than the sample rate are inherited.
"""
kwargs.setdefault("sampled", self.sampled)
rv = Span(
trace_id=self.trace_id,
span_id=None,
parent_span_id=self.span_id,
_span_id_generator=self._span_id_generator,
**kwargs
)
rv._span_recorder = recorder = self._span_recorder
if recorder:
recorder.add(rv)
return rv
def new_span(self, **kwargs):
# type: (**Any) -> Span
"""Deprecated: use start_child instead."""
logger.warning("Deprecated: use Span.start_child instead of Span.new_span.")
return self.start_child(**kwargs)
@classmethod
def continue_from_environ(
cls,
environ, # type: typing.Mapping[str, str]
**kwargs # type: Any
):
# type: (...) -> Transaction
if cls is Span:
logger.warning(
"Deprecated: use Transaction.continue_from_environ "
"instead of Span.continue_from_environ."
)
return Transaction.continue_from_headers(EnvironHeaders(environ), **kwargs)
@classmethod
def continue_from_headers(
cls,
headers, # type: typing.Mapping[str, str]
**kwargs # type: Any
):
# type: (...) -> Transaction
if cls is Span:
logger.warning(
"Deprecated: use Transaction.continue_from_headers "
"instead of Span.continue_from_headers."
)
parent = Transaction.from_traceparent(headers.get("sentry-trace"), **kwargs)
if parent is None:
parent = Transaction(**kwargs)
parent.same_process_as_parent = False
return parent
def iter_headers(self):
# type: () -> Generator[Tuple[str, str], None, None]
yield "sentry-trace", self.to_traceparent()
@classmethod
def from_traceparent(
cls,
traceparent, # type: Optional[str]
**kwargs # type: Any
):
# type: (...) -> Optional[Transaction]
if cls is Span:
logger.warning(
"Deprecated: use Transaction.from_traceparent "
"instead of Span.from_traceparent."
)
if not traceparent:
return None
if traceparent.startswith("00-") and traceparent.endswith("-00"):
traceparent = traceparent[3:-3]
match = _traceparent_header_format_re.match(str(traceparent))
if match is None:
return None
trace_id, span_id, sampled_str = match.groups()
if trace_id is not None:
trace_id = "{:032x}".format(int(trace_id, 16))
if span_id is not None:
span_id = "{:016x}".format(int(span_id, 16))
if sampled_str:
sampled = sampled_str != "0" # type: Optional[bool]
else:
sampled = None
return Transaction(
trace_id=trace_id, parent_span_id=span_id, sampled=sampled, **kwargs
)
def to_traceparent(self):
# type: () -> str
sampled = ""
if self.sampled is True:
sampled = "1"
if self.sampled is False:
sampled = "0"
return "%s-%s-%s" % (self.trace_id, self.span_id, sampled)
def to_legacy_traceparent(self):
# type: () -> str
return "00-%s-%s-00" % (self.trace_id, self.span_id)
def set_tag(self, key, value):
# type: (str, Any) -> None
self._tags[key] = value
def set_data(self, key, value):
# type: (str, Any) -> None
self._data[key] = value
def set_status(self, value):
# type: (str) -> None
self.status = value
def set_http_status(self, http_status):
# type: (int) -> None
self.set_tag("http.status_code", http_status)
if http_status < 400:
self.set_status("ok")
elif 400 <= http_status < 500:
if http_status == 403:
self.set_status("permission_denied")
elif http_status == 404:
self.set_status("not_found")
elif http_status == 429:
self.set_status("resource_exhausted")
elif http_status == 413:
self.set_status("failed_precondition")
elif http_status == 401:
self.set_status("unauthenticated")
elif http_status == 409:
self.set_status("already_exists")
else:
self.set_status("invalid_argument")
elif 500 <= http_status < 600:
if http_status == 504:
self.set_status("deadline_exceeded")
elif http_status == 501:
self.set_status("unimplemented")
elif http_status == 503:
self.set_status("unavailable")
else:
self.set_status("internal_error")
else:
self.set_status("unknown_error")
def is_success(self):
# type: () -> bool
return self.status == "ok"
def finish(self, hub=None):
# type: (Optional[sentry_sdk.Hub]) -> Optional[str]
# XXX: would be type: (Optional[sentry_sdk.Hub]) -> None, but that leads
# to incompatible return types for Span.finish and Transaction.finish.
if self.timestamp is not None:
# This span is already finished, ignore.
return None
hub = hub or self.hub or sentry_sdk.Hub.current
try:
duration_seconds = time.perf_counter() - self._start_timestamp_monotonic
self.timestamp = self.start_timestamp + timedelta(seconds=duration_seconds)
except AttributeError:
self.timestamp = datetime.utcnow()
_maybe_create_breadcrumbs_from_span(hub, self)
return None
def to_json(self, client):
# type: (Optional[sentry_sdk.Client]) -> Dict[str, Any]
rv = {
"trace_id": self.trace_id,
"span_id": self.span_id,
"parent_span_id": self.parent_span_id,
"same_process_as_parent": self.same_process_as_parent,
"op": self.op,
"description": self.description,
"start_timestamp": self.start_timestamp,
"timestamp": self.timestamp,
} # type: Dict[str, Any]
if self.status:
self._tags["status"] = self.status
tags = self._tags
if tags:
rv["tags"] = tags
data = self._data
if data:
rv["data"] = data
return rv
def get_trace_context(self):
# type: () -> Any
rv = {
"trace_id": self.trace_id,
"span_id": self.span_id,
"parent_span_id": self.parent_span_id,
"op": self.op,
"description": self.description,
}
if self.status:
rv["status"] = self.status
return rv
class Transaction(Span):
__slots__ = ("name",)
def __init__(
self,
name="", # type: str
**kwargs # type: Any
):
# type: (...) -> None
# TODO: consider removing this in a future release.
# This is for backwards compatibility with releases before Transaction
# existed, to allow for a smoother transition.
if not name and "transaction" in kwargs:
logger.warning(
"Deprecated: use Transaction(name=...) to create transactions "
"instead of Span(transaction=...)."
)
name = kwargs.pop("transaction")
if "_span_id_generator" in kwargs:
raise TypeError("Argument _span_id_generator can only be provided to Spans")
# next() on itertools.count() is a way to get-and-increment an integer
# "atomically" on Python runtimes with a GIL
if _ITERTOOLS_COUNT_IS_ATOMIC and kwargs.pop("_fast_span_ids", None):
kwargs["_span_id_generator"] = itertools.count()
Span.__init__(self, **kwargs)
self.name = name
def __repr__(self):
# type: () -> str
return (
"<%s(name=%r, trace_id=%r, span_id=%r, parent_span_id=%r, sampled=%r)>"
% (
self.__class__.__name__,
self.name,
self.trace_id,
self.span_id,
self.parent_span_id,
self.sampled,
)
)
def finish(self, hub=None):
# type: (Optional[sentry_sdk.Hub]) -> Optional[str]
if self.timestamp is not None:
# This transaction is already finished, ignore.
return None
if self._span_recorder is None:
return None
hub = hub or self.hub or sentry_sdk.Hub.current
client = hub.client
if client is None:
# We have no client and therefore nowhere to send this transaction.
return None
if not self.name:
logger.warning(
"Transaction has no name, falling back to `<unlabeled transaction>`."
)
self.name = "<unlabeled transaction>"
Span.finish(self, hub)
if not self.sampled:
# At this point a `sampled = None` should have already been resolved
# to a concrete decision.
if self.sampled is None:
logger.warning("Discarding transaction without sampling decision.")
return None
finished_spans = [
span.to_json(client)
for span in self._span_recorder.spans
if span is not self and span.timestamp is not None
]
return hub.capture_event(
{
"type": "transaction",
"transaction": self.name,
"contexts": {"trace": self.get_trace_context()},
"tags": self._tags,
"timestamp": self.timestamp,
"start_timestamp": self.start_timestamp,
"spans": finished_spans,
}
)
def _format_sql(cursor, sql):
# type: (Any, str) -> Optional[str]
real_sql = None
# If we're using psycopg2, it could be that we're
# looking at a query that uses Composed objects. Use psycopg2's mogrify
# function to format the query. We lose per-parameter trimming but gain
# accuracy in formatting.
try:
if hasattr(cursor, "mogrify"):
real_sql = cursor.mogrify(sql)
if isinstance(real_sql, bytes):
real_sql = real_sql.decode(cursor.connection.encoding)
except Exception:
real_sql = None
return real_sql or to_string(sql)
@contextlib.contextmanager
def record_sql_queries(
hub, # type: sentry_sdk.Hub
cursor, # type: Any
query, # type: Any
params_list, # type: Any
paramstyle, # type: Optional[str]
executemany, # type: bool
):
# type: (...) -> Generator[Span, None, None]
# TODO: Bring back capturing of params by default
if hub.client and hub.client.options["_experiments"].get(
"record_sql_params", False
):
if not params_list or params_list == [None]:
params_list = None
if paramstyle == "pyformat":
paramstyle = "format"
else:
params_list = None
paramstyle = None
query = _format_sql(cursor, query)
data = {}
if params_list is not None:
data["db.params"] = params_list
if paramstyle is not None:
data["db.paramstyle"] = paramstyle
if executemany:
data["db.executemany"] = True
with capture_internal_exceptions():
hub.add_breadcrumb(message=query, category="query", data=data)
with hub.start_span(op="db", description=query) as span:
for k, v in data.items():
span.set_data(k, v)
yield span
def _maybe_create_breadcrumbs_from_span(hub, span):
# type: (sentry_sdk.Hub, Span) -> None
if span.op == "redis":
hub.add_breadcrumb(
message=span.description, type="redis", category="redis", data=span._tags
)
elif span.op == "http":
hub.add_breadcrumb(type="http", category="httplib", data=span._data)
elif span.op == "subprocess":
hub.add_breadcrumb(
type="subprocess",
category="subprocess",
message=span.description,
data=span._data,
)