Logan Cusano
5355095c48
/upload compared the per-node API key with a plain !=, which short-circuits on the first differing byte and so leaks a little information about how much of a guess was correct. The reason to fix it is less the timing channel itself -- an HTTP round trip is noisy -- than the inconsistency: enrollment.py and dynsec.py both went out of their way to use secrets.compare_digest for the same class of credential, so the codebase contradicted itself on whether this mattered. Now it does not. Also coalesces a missing api_key field to "" so compare_digest is never handed None, which would raise TypeError and turn a malformed node_keys document into a 500 instead of a 401. Closes logan/server-26#12
357 lines
15 KiB
Python
357 lines
15 KiB
Python
import secrets
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from typing import Optional
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from datetime import datetime, timezone
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from fastapi import APIRouter, BackgroundTasks, UploadFile, File, Form, HTTPException, Security
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from app.internal.storage import upload_audio
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from app.internal import dedup
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from app.internal import firestore as fstore
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from app.internal.logger import logger
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from app.config import settings
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router = APIRouter(tags=["upload"])
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_bearer = HTTPBearer(auto_error=False)
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@router.post("/upload")
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async def upload_call_audio(
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background_tasks: BackgroundTasks,
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file: UploadFile = File(...),
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call_id: str = Form(...),
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node_id: str = Form(...),
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talkgroup_id: Optional[int] = Form(None),
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talkgroup_name: Optional[str] = Form(None),
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system_id: Optional[str] = Form(None),
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credentials: Optional[HTTPAuthorizationCredentials] = Security(_bearer),
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):
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"""
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Receive an audio recording from an edge node.
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Upload to GCS, update the call document in Firestore with the audio URL,
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then kick off the intelligence pipeline as a background task.
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"""
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# Verify the per-node API key
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if not credentials:
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raise HTTPException(401, "Missing authorization")
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key_doc = await fstore.doc_get("node_keys", node_id)
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if not key_doc:
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logger.warning(f"Upload 401: no key_doc in Firestore for node_id={node_id!r}")
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raise HTTPException(401, "Invalid node API key")
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# compare_digest, not !=, so the comparison cost does not depend on how many
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# leading characters matched. enrollment.py and dynsec.py were explicit about
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# this for the same class of credential; this route was the odd one out.
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stored_key = key_doc.get("api_key") or ""
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if not secrets.compare_digest(stored_key, credentials.credentials):
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logger.warning(
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f"Upload 401: key mismatch for node_id={node_id!r} "
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f"(received prefix: {credentials.credentials[:8]}...)"
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)
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raise HTTPException(401, "Invalid node API key")
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data = await file.read()
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if not data:
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raise HTTPException(400, "Empty file.")
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if len(data) > settings.upload_max_bytes:
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raise HTTPException(413, f"File too large (max {settings.upload_max_bytes // (1024*1024)} MB).")
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gcs_uri = await upload_audio(data, file.filename or "", call_id=call_id)
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if gcs_uri:
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try:
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# Canonical object location only. The playback link is minted per
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# read in storage.playback_url() — nothing durable is stored here.
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# org_id is stamped defensively here too (not just in
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# mqtt_handler.py's call_start/call_end): key_doc above proves this
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# node_id is real and authenticated, so resolving org_id from the
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# node doc here covers a call whose Firestore doc was somehow
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# never written by call_start (the upload is otherwise the
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# authoritative record of which node this audio came from).
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node = await fstore.doc_get_cached("nodes", node_id)
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updates = {"audio_gcs_uri": gcs_uri}
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if node and node.get("org_id"):
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updates["org_id"] = node["org_id"]
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await fstore.doc_set("calls", call_id, updates)
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except Exception as e:
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logger.warning(f"Could not update call {call_id} with audio_gcs_uri: {e}")
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# Another node in range recorded the same transmission. Keep the audio
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# (it may be the cleaner capture) but don't transcribe or correlate it
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# a second time — see app/internal/dedup.py.
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call_doc = await fstore.doc_get("calls", call_id)
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duplicate_of = await dedup.find_duplicate_of(call_doc) if call_doc else None
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if duplicate_of:
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await fstore.doc_set("calls", call_id, {"duplicate_of": duplicate_of})
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logger.info(
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f"Call {call_id} from {node_id} duplicates {duplicate_of} "
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f"— audio kept, AI pipeline skipped."
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)
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return {"url": gcs_uri, "duplicate_of": duplicate_of}
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background_tasks.add_task(
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_run_intelligence_pipeline,
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call_id=call_id,
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node_id=node_id,
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system_id=system_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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gcs_uri=gcs_uri,
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)
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return {"url": gcs_uri}
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async def _correlate_with_consensus(
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call_id: str,
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node_id: str,
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system_id: Optional[str],
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talkgroup_id: Optional[int],
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talkgroup_name: Optional[str],
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tags: list[str],
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incident_type: Optional[str],
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location: Optional[str],
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location_coords: Optional[dict],
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units: Optional[list] = None,
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vehicles: Optional[list] = None,
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cleared_units: Optional[list] = None,
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reassignment: bool = False,
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) -> Optional[str]:
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"""
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Consensus correlator: runs the rules engine and the cheap LLM in sequence.
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If they agree the rules decision is committed directly.
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If they disagree a smarter tiebreaker LLM makes the final call.
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Falls back to rules-only when GEMINI_API_KEY is absent, the call is
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content-free (thin), or any LLM call fails.
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"""
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from app.internal import incident_correlator, llm_correlator
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preview = await incident_correlator.preview_correlation(
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call_id=call_id, node_id=node_id, system_id=system_id,
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talkgroup_id=talkgroup_id, talkgroup_name=talkgroup_name,
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tags=tags, incident_type=incident_type, location=location,
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location_coords=location_coords, units=units, vehicles=vehicles,
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cleared_units=cleared_units, reassignment=reassignment,
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)
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ctx = preview["ctx"]
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rules_decision = preview["decision"]
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llm_decision = await llm_correlator.decide(call_id, ctx)
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if llm_decision is None:
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# LLM unavailable, skipped (thin call), or errored — rules wins.
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rules_decision["corr_debug"]["corr_consensus"] = "rules_only"
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return await incident_correlator.apply_correlation(preview)
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if llm_correlator.decisions_agree(rules_decision, llm_decision):
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rules_decision["corr_debug"]["corr_consensus"] = "agreed"
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rules_decision["corr_debug"]["corr_llm_reasoning"] = llm_decision.get("reasoning", "")
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return await incident_correlator.apply_correlation(preview)
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# Disagree — escalate to the smarter tiebreaker.
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logger.info(
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f"Consensus disagreement for call {call_id}: "
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f"rules={rules_decision['action']} vs llm={llm_decision['action']} — tiebreak"
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)
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final = await llm_correlator.tiebreak(rules_decision, llm_decision, ctx)
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final["corr_debug"]["corr_consensus"] = "tiebreak"
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final["corr_debug"]["corr_rules_action"] = rules_decision["action"]
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final["corr_debug"]["corr_llm_action"] = llm_decision["action"]
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return await incident_correlator.apply_correlation({"decision": final, "ctx": ctx})
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async def _run_extraction_pipeline(
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call_id: str,
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node_id: str,
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system_id: Optional[str],
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talkgroup_id: Optional[int],
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talkgroup_name: Optional[str],
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transcript: str,
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segments: Optional[list] = None,
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preserve_transcript_correction: bool = False,
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) -> None:
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"""Run steps 2-4 of the intelligence pipeline using an existing transcript."""
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from app.internal import intelligence, incident_correlator, alerter
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# Step 2: Scene detection + intelligence extraction.
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# Returns one scene per distinct incident detected in the recording.
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scenes = await intelligence.extract_scenes(
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call_id, transcript, talkgroup_name,
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talkgroup_id=talkgroup_id, system_id=system_id, segments=segments,
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node_id=node_id,
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preserve_transcript_correction=preserve_transcript_correction,
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)
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# Step 3: Correlate each scene to an incident independently.
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incident_ids: list[str] = []
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all_tags: list[str] = []
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for scene in scenes:
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all_tags.extend(scene["tags"])
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# When dispatch is pulling a unit to a NEW call (reassignment), suppress unit
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# overlap so the new scene doesn't chain into the unit's previous incident.
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is_reassignment = bool(scene.get("reassignment"))
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corr_units = [] if is_reassignment else scene.get("units")
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incident_id = await _correlate_with_consensus(
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call_id=call_id,
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node_id=node_id,
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system_id=system_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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tags=scene["tags"],
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incident_type=scene["incident_type"],
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location=scene["location"],
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location_coords=scene["location_coords"],
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units=corr_units,
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vehicles=scene.get("vehicles"),
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cleared_units=scene.get("cleared_units"),
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reassignment=is_reassignment,
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)
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if incident_id and incident_id not in incident_ids:
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incident_ids.append(incident_id)
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if scene["resolved"] and incident_id:
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await fstore.doc_set("incidents", incident_id, {
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"status": "resolved",
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"resolved_at": datetime.now(timezone.utc).isoformat(),
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})
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await incident_correlator.maybe_resolve_parent(incident_id)
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logger.info(f"Auto-resolved incident {incident_id} (LLM closure detection)")
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if incident_ids:
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await fstore.doc_set("calls", call_id, {"incident_ids": incident_ids})
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# Step 4: Alert dispatch — run once with merged tags from all scenes.
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await alerter.check_and_dispatch(
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call_id=call_id,
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node_id=node_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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tags=list(dict.fromkeys(all_tags)),
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transcript=transcript,
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)
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async def _run_intelligence_pipeline(
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call_id: str,
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node_id: str,
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system_id: Optional[str],
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talkgroup_id: Optional[int],
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talkgroup_name: Optional[str],
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gcs_uri: Optional[str],
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) -> None:
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"""
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Post-upload intelligence pipeline (runs as a background task):
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1. Transcribe audio via Google STT
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2. Detect scenes + extract intelligence (one result per incident in recording)
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3. Correlate each scene with existing incidents (or create new ones)
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4. Check alert rules and dispatch notifications
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"""
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from app.internal import transcription, intelligence, incident_correlator, alerter
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from app.internal.feature_flags import get_flags
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flags = await get_flags()
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# Resolve per-system overrides: system flag=False beats global flag=True,
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# but global flag=False beats everything (master switch).
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system_ai_flags: dict = {}
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if system_id:
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sys_doc = await fstore.doc_get_cached("systems", system_id)
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system_ai_flags = (sys_doc or {}).get("ai_flags") or {}
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def _flag(name: str) -> bool:
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if not flags[name]: # global master off
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return False
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return system_ai_flags.get(name, True) # system override, default inherit
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transcript: Optional[str] = None
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segments: list[dict] = []
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# Step 1: Transcription
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if gcs_uri:
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if _flag("stt_enabled"):
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transcript, segments = await transcription.transcribe_call(
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call_id, gcs_uri, talkgroup_name, system_id=system_id
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)
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else:
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scope = "globally" if not flags["stt_enabled"] else f"system {system_id}"
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logger.info(f"STT disabled ({scope}) — skipping transcription for call {call_id}")
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# Step 2: Scene detection + intelligence extraction
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scenes: list[dict] = []
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if _flag("correlation_enabled"):
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if transcript:
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scenes = await intelligence.extract_scenes(
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call_id, transcript, talkgroup_name,
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talkgroup_id=talkgroup_id, system_id=system_id, segments=segments,
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node_id=node_id,
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)
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else:
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scope = "globally" if not flags["correlation_enabled"] else f"system {system_id}"
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logger.info(f"Correlation disabled ({scope}) — skipping scene extraction and correlation for call {call_id}")
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# Step 3: Correlate each scene independently.
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# A single recording can produce multiple incidents on a busy channel.
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incident_ids: list[str] = []
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all_tags: list[str] = []
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if flags["correlation_enabled"]:
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for scene in scenes:
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all_tags.extend(scene["tags"])
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is_reassignment = bool(scene.get("reassignment"))
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corr_units = [] if is_reassignment else scene.get("units")
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incident_id = await _correlate_with_consensus(
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call_id=call_id,
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node_id=node_id,
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system_id=system_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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tags=scene["tags"],
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incident_type=scene["incident_type"],
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location=scene["location"],
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location_coords=scene["location_coords"],
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units=corr_units,
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vehicles=scene.get("vehicles"),
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cleared_units=scene.get("cleared_units"),
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reassignment=is_reassignment,
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)
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if incident_id and incident_id not in incident_ids:
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incident_ids.append(incident_id)
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if scene["resolved"] and incident_id:
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await fstore.doc_set("incidents", incident_id, {
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"status": "resolved",
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"resolved_at": datetime.now(timezone.utc).isoformat(),
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})
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await incident_correlator.maybe_resolve_parent(incident_id)
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logger.info(f"Auto-resolved incident {incident_id} (LLM closure detection)")
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# Correlator also runs for calls with no scenes (unclassified) to attempt
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# talkgroup-based linking even when no transcript could be produced.
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# Skip when extraction flagged the call — garbage or too-short transcripts
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# carry no signal and would only attach spuriously via the thin path.
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if not scenes:
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_call_doc = await fstore.doc_get("calls", call_id)
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if not (_call_doc or {}).get("skip_reason"):
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incident_id = await _correlate_with_consensus(
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call_id=call_id,
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node_id=node_id,
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system_id=system_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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tags=[],
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incident_type=None,
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location=None,
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location_coords=None,
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)
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if incident_id:
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incident_ids.append(incident_id)
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if incident_ids:
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await fstore.doc_set("calls", call_id, {"incident_ids": incident_ids})
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# Step 4: Alert dispatch (always runs — talkgroup ID rules don't need a transcript)
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await alerter.check_and_dispatch(
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call_id=call_id,
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node_id=node_id,
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talkgroup_id=talkgroup_id,
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talkgroup_name=talkgroup_name,
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tags=list(dict.fromkeys(all_tags)),
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transcript=transcript,
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)
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