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from django.template import TemplateSyntaxError from sentry_sdk._types import MYPY if MYPY: from typing import Any from typing import Dict from typing import Optional from typing import Iterator from typing import Tuple try: # support Django 1.9 from django.template.base import Origin except ImportError: # backward compatibility from django.template.loader import LoaderOrigin as Origin def get_template_frame_from_exception(exc_value): # type: (Optional[BaseException]) -> Optional[Dict[str, Any]] # As of Django 1.9 or so the new template debug thing showed up. if hasattr(exc_value, "template_debug"): return _get_template_frame_from_debug(exc_value.template_debug) # type: ignore # As of r16833 (Django) all exceptions may contain a # ``django_template_source`` attribute (rather than the legacy # ``TemplateSyntaxError.source`` check) if hasattr(exc_value, "django_template_source"): return _get_template_frame_from_source( exc_value.django_template_source # type: ignore ) if isinstance(exc_value, TemplateSyntaxError) and hasattr(exc_value, "source"): source = exc_value.source if isinstance(source, (tuple, list)) and isinstance(source[0], Origin): return _get_template_frame_from_source(source) # type: ignore return None def _get_template_frame_from_debug(debug): # type: (Dict[str, Any]) -> Dict[str, Any] if debug is None: return None lineno = debug["line"] filename = debug["name"] if filename is None: filename = "<django template>" pre_context = [] post_context = [] context_line = None for i, line in debug["source_lines"]: if i < lineno: pre_context.append(line) elif i > lineno: post_context.append(line) else: context_line = line return { "filename": filename, "lineno": lineno, "pre_context": pre_context[-5:], "post_context": post_context[:5], "context_line": context_line, "in_app": True, } def _linebreak_iter(template_source): # type: (str) -> Iterator[int] yield 0 p = template_source.find("\n") while p >= 0: yield p + 1 p = template_source.find("\n", p + 1) def _get_template_frame_from_source(source): # type: (Tuple[Origin, Tuple[int, int]]) -> Optional[Dict[str, Any]] if not source: return None origin, (start, end) = source filename = getattr(origin, "loadname", None) if filename is None: filename = "<django template>" template_source = origin.reload() lineno = None upto = 0 pre_context = [] post_context = [] context_line = None for num, next in enumerate(_linebreak_iter(template_source)): line = template_source[upto:next] if start >= upto and end <= next: lineno = num context_line = line elif lineno is None: pre_context.append(line) else: post_context.append(line) upto = next if context_line is None or lineno is None: return None return { "filename": filename, "lineno": lineno, "pre_context": pre_context[-5:], "post_context": post_context[:5], "context_line": context_line, }