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serializer.py
import sys import math from datetime import datetime from sentry_sdk.utils import ( AnnotatedValue, capture_internal_exception, disable_capture_event, format_timestamp, safe_repr, strip_string, ) from sentry_sdk._compat import ( text_type, PY2, string_types, number_types, iteritems, binary_sequence_types, ) from sentry_sdk._types import TYPE_CHECKING if TYPE_CHECKING: from types import TracebackType from typing import Any from typing import Callable from typing import ContextManager from typing import Dict from typing import List from typing import Optional from typing import Type from typing import Union from sentry_sdk._types import NotImplementedType, Event Span = Dict[str, Any] ReprProcessor = Callable[[Any, Dict[str, Any]], Union[NotImplementedType, str]] Segment = Union[str, int] if PY2: # Importing ABCs from collections is deprecated, and will stop working in 3.8 # https://github.com/python/cpython/blob/master/Lib/collections/__init__.py#L49 from collections import Mapping, Sequence, Set serializable_str_types = string_types + binary_sequence_types else: # New in 3.3 # https://docs.python.org/3/library/collections.abc.html from collections.abc import Mapping, Sequence, Set # Bytes are technically not strings in Python 3, but we can serialize them serializable_str_types = string_types + binary_sequence_types # Maximum length of JSON-serialized event payloads that can be safely sent # before the server may reject the event due to its size. This is not intended # to reflect actual values defined server-side, but rather only be an upper # bound for events sent by the SDK. # # Can be overwritten if wanting to send more bytes, e.g. with a custom server. # When changing this, keep in mind that events may be a little bit larger than # this value due to attached metadata, so keep the number conservative. MAX_EVENT_BYTES = 10**6 # Maximum depth and breadth of databags. Excess data will be trimmed. If # max_request_body_size is "always", request bodies won't be trimmed. MAX_DATABAG_DEPTH = 5 MAX_DATABAG_BREADTH = 10 CYCLE_MARKER = "<cyclic>" global_repr_processors = [] # type: List[ReprProcessor] def add_global_repr_processor(processor): # type: (ReprProcessor) -> None global_repr_processors.append(processor) class Memo(object): __slots__ = ("_ids", "_objs") def __init__(self): # type: () -> None self._ids = {} # type: Dict[int, Any] self._objs = [] # type: List[Any] def memoize(self, obj): # type: (Any) -> ContextManager[bool] self._objs.append(obj) return self def __enter__(self): # type: () -> bool obj = self._objs[-1] if id(obj) in self._ids: return True else: self._ids[id(obj)] = obj return False def __exit__( self, ty, # type: Optional[Type[BaseException]] value, # type: Optional[BaseException] tb, # type: Optional[TracebackType] ): # type: (...) -> None self._ids.pop(id(self._objs.pop()), None) def serialize(event, **kwargs): # type: (Event, **Any) -> Event memo = Memo() path = [] # type: List[Segment] meta_stack = [] # type: List[Dict[str, Any]] keep_request_bodies = ( kwargs.pop("max_request_body_size", None) == "always" ) # type: bool max_value_length = kwargs.pop("max_value_length", None) # type: Optional[int] def _annotate(**meta): # type: (**Any) -> None while len(meta_stack) <= len(path): try: segment = path[len(meta_stack) - 1] node = meta_stack[-1].setdefault(text_type(segment), {}) except IndexError: node = {} meta_stack.append(node) meta_stack[-1].setdefault("", {}).update(meta) def _should_repr_strings(): # type: () -> Optional[bool] """ By default non-serializable objects are going through safe_repr(). For certain places in the event (local vars) we want to repr() even things that are JSON-serializable to make their type more apparent. For example, it's useful to see the difference between a unicode-string and a bytestring when viewing a stacktrace. For container-types we still don't do anything different. Generally we just try to make the Sentry UI present exactly what a pretty-printed repr would look like. :returns: `True` if we are somewhere in frame variables, and `False` if we are in a position where we will never encounter frame variables when recursing (for example, we're in `event.extra`). `None` if we are not (yet) in frame variables, but might encounter them when recursing (e.g. we're in `event.exception`) """ try: p0 = path[0] if p0 == "stacktrace" and path[1] == "frames" and path[3] == "vars": return True if ( p0 in ("threads", "exception") and path[1] == "values" and path[3] == "stacktrace" and path[4] == "frames" and path[6] == "vars" ): return True except IndexError: return None return False def _is_databag(): # type: () -> Optional[bool] """ A databag is any value that we need to trim. :returns: Works like `_should_repr_strings()`. `True` for "yes", `False` for :"no", `None` for "maybe soon". """ try: rv = _should_repr_strings() if rv in (True, None): return rv is_request_body = _is_request_body() if is_request_body in (True, None): return is_request_body p0 = path[0] if p0 == "breadcrumbs" and path[1] == "values": path[2] return True if p0 == "extra": return True except IndexError: return None return False def _is_request_body(): # type: () -> Optional[bool] try: if path[0] == "request" and path[1] == "data": return True except IndexError: return None return False def _serialize_node( obj, # type: Any is_databag=None, # type: Optional[bool] is_request_body=None, # type: Optional[bool] should_repr_strings=None, # type: Optional[bool] segment=None, # type: Optional[Segment] remaining_breadth=None, # type: Optional[Union[int, float]] remaining_depth=None, # type: Optional[Union[int, float]] ): # type: (...) -> Any if segment is not None: path.append(segment) try: with memo.memoize(obj) as result: if result: return CYCLE_MARKER return _serialize_node_impl( obj, is_databag=is_databag, is_request_body=is_request_body, should_repr_strings=should_repr_strings, remaining_depth=remaining_depth, remaining_breadth=remaining_breadth, ) except BaseException: capture_internal_exception(sys.exc_info()) if is_databag: return "<failed to serialize, use init(debug=True) to see error logs>" return None finally: if segment is not None: path.pop() del meta_stack[len(path) + 1 :] def _flatten_annotated(obj): # type: (Any) -> Any if isinstance(obj, AnnotatedValue): _annotate(**obj.metadata) obj = obj.value return obj def _serialize_node_impl( obj, is_databag, is_request_body, should_repr_strings, remaining_depth, remaining_breadth, ): # type: (Any, Optional[bool], Optional[bool], Optional[bool], Optional[Union[float, int]], Optional[Union[float, int]]) -> Any if isinstance(obj, AnnotatedValue): should_repr_strings = False if should_repr_strings is None: should_repr_strings = _should_repr_strings() if is_databag is None: is_databag = _is_databag() if is_request_body is None: is_request_body = _is_request_body() if is_databag: if is_request_body and keep_request_bodies: remaining_depth = float("inf") remaining_breadth = float("inf") else: if remaining_depth is None: remaining_depth = MAX_DATABAG_DEPTH if remaining_breadth is None: remaining_breadth = MAX_DATABAG_BREADTH obj = _flatten_annotated(obj) if remaining_depth is not None and remaining_depth <= 0: _annotate(rem=[["!limit", "x"]]) if is_databag: return _flatten_annotated( strip_string(safe_repr(obj), max_length=max_value_length) ) return None if is_databag and global_repr_processors: hints = {"memo": memo, "remaining_depth": remaining_depth} for processor in global_repr_processors: result = processor(obj, hints) if result is not NotImplemented: return _flatten_annotated(result) sentry_repr = getattr(type(obj), "__sentry_repr__", None) if obj is None or isinstance(obj, (bool, number_types)): if should_repr_strings or ( isinstance(obj, float) and (math.isinf(obj) or math.isnan(obj)) ): return safe_repr(obj) else: return obj elif callable(sentry_repr): return sentry_repr(obj) elif isinstance(obj, datetime): return ( text_type(format_timestamp(obj)) if not should_repr_strings else safe_repr(obj) ) elif isinstance(obj, Mapping): # Create temporary copy here to avoid calling too much code that # might mutate our dictionary while we're still iterating over it. obj = dict(iteritems(obj)) rv_dict = {} # type: Dict[str, Any] i = 0 for k, v in iteritems(obj): if remaining_breadth is not None and i >= remaining_breadth: _annotate(len=len(obj)) break str_k = text_type(k) v = _serialize_node( v, segment=str_k, should_repr_strings=should_repr_strings, is_databag=is_databag, is_request_body=is_request_body, remaining_depth=remaining_depth - 1 if remaining_depth is not None else None, remaining_breadth=remaining_breadth, ) rv_dict[str_k] = v i += 1 return rv_dict elif not isinstance(obj, serializable_str_types) and isinstance( obj, (Set, Sequence) ): rv_list = [] for i, v in enumerate(obj): if remaining_breadth is not None and i >= remaining_breadth: _annotate(len=len(obj)) break rv_list.append( _serialize_node( v, segment=i, should_repr_strings=should_repr_strings, is_databag=is_databag, is_request_body=is_request_body, remaining_depth=remaining_depth - 1 if remaining_depth is not None else None, remaining_breadth=remaining_breadth, ) ) return rv_list if should_repr_strings: obj = safe_repr(obj) else: if isinstance(obj, bytes) or isinstance(obj, bytearray): obj = obj.decode("utf-8", "replace") if not isinstance(obj, string_types): obj = safe_repr(obj) is_span_description = ( len(path) == 3 and path[0] == "spans" and path[-1] == "description" ) if is_span_description: return obj return _flatten_annotated(strip_string(obj, max_length=max_value_length)) # # Start of serialize() function # disable_capture_event.set(True) try: serialized_event = _serialize_node(event, **kwargs) if meta_stack and isinstance(serialized_event, dict): serialized_event["_meta"] = meta_stack[0] return serialized_event finally: disable_capture_event.set(False)
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