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.
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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import asyncio
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import time
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from typing import Any, Optional
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from fastapi import APIRouter, Depends
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from decnet.telemetry import traced as _traced
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from decnet.web.dependencies import require_viewer, repo
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from decnet.web.db.models import StatsResponse
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router = APIRouter()
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# /stats is aggregate telemetry polled constantly by the UI and locust.
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# A 5s window collapses thousands of concurrent calls — each of which
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# runs SELECT count(*) FROM logs + SELECT count(DISTINCT attacker_ip) —
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# into one DB hit per window.
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_STATS_TTL = 5.0
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_stats_cache: tuple[Optional[dict[str, Any]], float] = (None, 0.0)
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_stats_lock: Optional[asyncio.Lock] = None
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def _reset_stats_cache() -> None:
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global _stats_cache, _stats_lock
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_stats_cache = (None, 0.0)
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_stats_lock = None
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async def _get_stats_cached() -> dict[str, Any]:
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global _stats_cache, _stats_lock
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value, ts = _stats_cache
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now = time.monotonic()
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if value is not None and now - ts < _STATS_TTL:
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return value
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if _stats_lock is None:
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_stats_lock = asyncio.Lock()
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async with _stats_lock:
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value, ts = _stats_cache
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now = time.monotonic()
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if value is not None and now - ts < _STATS_TTL:
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return value
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value = await repo.get_stats_summary()
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_stats_cache = (value, time.monotonic())
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return value
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@router.get("/stats", response_model=StatsResponse, tags=["Observability"],
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responses={401: {"description": "Could not validate credentials"}, 403: {"description": "Insufficient permissions"}, 422: {"description": "Validation error"}},)
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@_traced("api.get_stats")
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async def get_stats(user: dict = Depends(require_viewer)) -> dict[str, Any]:
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return await _get_stats_cached()
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