anti
f2b3393669
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends `SPDX-License-Identifier: AGPL-3.0-or-later` to every source file across decnet/, decnet_web/, tests/, scripts/, and tools/. Rationale: closes the GPLv3 ASP loophole so any party operating a modified DECNET as a network service must offer their modified source. Personal copyright (Samuel Paschuan) + inbound=outbound contributions make a future unilateral relicense infeasible. - LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt) - COPYRIGHT: project copyright notice - tools/add_spdx_headers.py: idempotent header injector (shebang- and PEP 263-aware) Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh). No behavior change; comments only.
85 lines
2.8 KiB
Python
85 lines
2.8 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""iptoasn provider — orchestrates fetch + parse into an :class:`AsnLookup`.
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Mirrors :class:`decnet.geoip.rir.provider.RirProvider` exactly: fetch,
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build a pickled cache, invalidate when raw files are newer than the
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cache.
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"""
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from __future__ import annotations
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import logging
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from pathlib import Path
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from typing import Sequence
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from decnet.asn.base import Provider
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from decnet.asn.iptoasn.fetch import IPTOASN_SOURCES, fetch_all
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from decnet.asn.iptoasn.parse import parse_file
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from decnet.asn.lookup import AsnLookup, Range
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from decnet.asn.paths import ensure_root
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logger = logging.getLogger("decnet.asn.iptoasn.provider")
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# Pickled lookup cache — skips re-parsing the ~580k-row gz dump on every
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# profiler restart. Rebuilt whenever any raw file is newer than the
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# cache, see ``_cache_fresh``.
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_CACHE_NAME = ".iptoasn_index.pkl"
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class IptoasnProvider(Provider):
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name = "iptoasn"
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def __init__(self) -> None:
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self._root = ensure_root()
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# ---------- Provider interface ----------
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def refresh(self) -> None:
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logger.info("asn.iptoasn: refreshing dump into %s", self._root)
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fetch_all(self._root)
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cache = self._root / _CACHE_NAME
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if cache.exists():
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cache.unlink(missing_ok=True)
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def build_lookup(self) -> AsnLookup:
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cache = self._root / _CACHE_NAME
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if self._cache_fresh(cache):
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try:
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lookup = AsnLookup.load(cache)
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logger.debug(
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"asn.iptoasn: loaded cached index (%d ranges)",
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len(lookup),
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)
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return lookup
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except Exception as exc:
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logger.warning(
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"asn.iptoasn: cache load failed, rebuilding: %s", exc
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)
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ranges: list[Range] = []
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for path in self.data_paths():
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if not path.exists():
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continue
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ranges.extend(parse_file(path))
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lookup = AsnLookup.from_ranges(ranges)
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try:
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lookup.save(cache)
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except Exception as exc:
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logger.warning("asn.iptoasn: cache save failed: %s", exc)
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logger.info("asn.iptoasn: built index with %d ranges", len(lookup))
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return lookup
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def data_paths(self) -> Sequence[Path]:
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return [self._root / f"{name}.tsv.gz" for name, _url in IPTOASN_SOURCES]
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# ---------- internals ----------
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def _cache_fresh(self, cache: Path) -> bool:
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"""True when the pickle exists and is at least as new as every raw file."""
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if not cache.exists():
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return False
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cache_mtime = cache.stat().st_mtime
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for path in self.data_paths():
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if path.exists() and path.stat().st_mtime > cache_mtime:
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return False
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return True
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