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|
import inspect
import logging
import sys
import traceback
from collections import Counter
from html import escape as escape_html
from types import FrameType, TracebackType
from typing import Union, Iterable, List
from stack_data import (
style_with_executing_node,
Options,
Line,
FrameInfo,
Variable,
RepeatedFrames,
)
from stack_data.utils import some_str
log = logging.getLogger(__name__)
class Serializer:
def __init__(
self,
*,
options=None,
pygmented=False,
show_executing_node=True,
pygments_formatter_cls=None,
pygments_formatter_kwargs=None,
pygments_style="monokai",
executing_node_modifier="bg:#005080",
use_code_qualname=True,
strip_leading_indent=True,
html=False,
chain=True,
collapse_repeated_frames=True,
show_variables=False,
):
if options is None:
options = Options()
if pygmented and not options.pygments_formatter:
if show_executing_node:
pygments_style = style_with_executing_node(
pygments_style, executing_node_modifier
)
if pygments_formatter_cls is None:
if html:
from pygments.formatters.html import (
HtmlFormatter as pygments_formatter_cls,
)
else:
from pygments.formatters.terminal256 import (
Terminal256Formatter as pygments_formatter_cls,
)
options.pygments_formatter = pygments_formatter_cls(
style=pygments_style,
**pygments_formatter_kwargs or {},
)
self.pygmented = pygmented
self.use_code_qualname = use_code_qualname
self.strip_leading_indent = strip_leading_indent
self.html = html
self.chain = chain
self.options = options
self.collapse_repeated_frames = collapse_repeated_frames
self.show_variables = show_variables
def format_exception(self, e=None) -> List[dict]:
if e is None:
e = sys.exc_info()[1]
result = []
if self.chain:
if e.__cause__ is not None:
result = self.format_exception(e.__cause__)
result[-1]["tail"] = traceback._cause_message.strip()
elif e.__context__ is not None and not e.__suppress_context__:
result = self.format_exception(e.__context__)
result[-1]["tail"] = traceback._context_message.strip()
result.append(self.format_traceback_part(e))
return result
def format_traceback_part(self, e: BaseException) -> dict:
return dict(
frames=self.format_stack(e.__traceback__ or sys.exc_info()[2]),
exception=dict(
type=type(e).__name__,
message=some_str(e),
),
tail="",
)
def format_stack(self, frame_or_tb=None) -> List[dict]:
if frame_or_tb is None:
frame_or_tb = inspect.currentframe().f_back
return list(
self.format_stack_data(
FrameInfo.stack_data(
frame_or_tb,
self.options,
collapse_repeated_frames=self.collapse_repeated_frames,
)
)
)
def format_stack_data(
self, stack: Iterable[Union[FrameInfo, RepeatedFrames]]
) -> Iterable[dict]:
for item in stack:
if isinstance(item, FrameInfo):
if not self.should_include_frame(item):
continue
yield dict(type="frame", **self.format_frame(item))
else:
yield dict(type="repeated_frames", **self.format_repeated_frames(item))
def format_repeated_frames(self, repeated_frames: RepeatedFrames) -> dict:
counts = sorted(
Counter(repeated_frames.frame_keys).items(),
key=lambda item: (-item[1], item[0][0].co_name),
)
return dict(
frames=[
dict(
name=code.co_name,
lineno=lineno,
count=count,
)
for (code, lineno), count in counts
]
)
def format_frame(self, frame: Union[FrameInfo, FrameType, TracebackType]) -> dict:
if not isinstance(frame, FrameInfo):
frame = FrameInfo(frame, self.options)
result = dict(
name=(
frame.executing.code_qualname()
if self.use_code_qualname
else frame.code.co_name
),
filename=frame.filename,
lineno=frame.lineno,
lines=list(self.format_lines(frame.lines)),
)
if self.show_variables:
result["variables"] = list(self.format_variables(frame))
return result
def format_lines(self, lines):
for line in lines:
if isinstance(line, Line):
yield dict(type="line", **self.format_line(line))
else:
yield dict(type="line_gap")
def format_line(self, line: Line) -> dict:
return dict(
is_current=line.is_current,
lineno=line.lineno,
text=line.render(
pygmented=self.pygmented,
escape_html=self.html,
strip_leading_indent=self.strip_leading_indent,
),
)
def format_variables(self, frame_info: FrameInfo) -> Iterable[dict]:
try:
for var in sorted(frame_info.variables, key=lambda v: v.name):
yield self.format_variable(var)
except Exception: # pragma: no cover
log.exception("Error in getting frame variables")
def format_variable(self, var: Variable) -> dict:
return dict(
name=self.format_variable_part(var.name),
value=self.format_variable_part(self.format_variable_value(var.value)),
)
def format_variable_part(self, text):
if self.html:
return escape_html(text)
else:
return text
def format_variable_value(self, value) -> str:
return repr(value)
def should_include_frame(self, frame_info: FrameInfo) -> bool:
return True # pragma: no cover
|
