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- Fix SSE fanout thread AttributeError when source queue is None during interpreter shutdown by snapshotting to local variable with null guard - Fix branded "i" logo rendering oversized on first page load (FOUC) by adding inline width/height to SVG elements across 10 templates - Bump version to 2.26.0 in config.py, pyproject.toml, and CHANGELOG.md Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
680 lines
22 KiB
Python
680 lines
22 KiB
Python
"""
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GPS support for INTERCEPT via gpsd daemon.
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Provides GPS location data by connecting to the gpsd daemon.
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"""
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from __future__ import annotations
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import contextlib
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import logging
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import socket as _socket_mod
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import threading
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from dataclasses import dataclass, field
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from datetime import datetime
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from typing import Callable
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logger = logging.getLogger('intercept.gps')
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@dataclass
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class GPSSatellite:
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"""Individual satellite data from gpsd SKY message."""
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prn: int
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elevation: float | None = None # degrees
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azimuth: float | None = None # degrees
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snr: float | None = None # dB-Hz
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used: bool = False
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constellation: str = 'GPS' # GPS, GLONASS, Galileo, BeiDou, SBAS, QZSS
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def to_dict(self) -> dict:
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return {
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'prn': self.prn,
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'elevation': self.elevation,
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'azimuth': self.azimuth,
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'snr': self.snr,
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'used': self.used,
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'constellation': self.constellation,
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}
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@dataclass
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class GPSSkyData:
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"""Sky view data from gpsd SKY message."""
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satellites: list[GPSSatellite] = field(default_factory=list)
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hdop: float | None = None
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vdop: float | None = None
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pdop: float | None = None
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tdop: float | None = None
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gdop: float | None = None
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xdop: float | None = None
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ydop: float | None = None
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nsat: int = 0 # total visible
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usat: int = 0 # total used
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def to_dict(self) -> dict:
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return {
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'satellites': [s.to_dict() for s in self.satellites],
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'hdop': self.hdop,
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'vdop': self.vdop,
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'pdop': self.pdop,
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'tdop': self.tdop,
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'gdop': self.gdop,
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'xdop': self.xdop,
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'ydop': self.ydop,
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'nsat': self.nsat,
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'usat': self.usat,
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}
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@dataclass
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class GPSPosition:
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"""GPS position data."""
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latitude: float
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longitude: float
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altitude: float | None = None
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speed: float | None = None # m/s
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heading: float | None = None # degrees
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climb: float | None = None # m/s vertical speed
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satellites: int | None = None
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fix_quality: int = 0 # 0=unknown, 1=no fix, 2=2D fix, 3=3D fix
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timestamp: datetime | None = None
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device: str | None = None
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# Error estimates
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epx: float | None = None # lon error (m)
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epy: float | None = None # lat error (m)
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epv: float | None = None # vertical error (m)
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eps: float | None = None # speed error (m/s)
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ept: float | None = None # time error (s)
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def to_dict(self) -> dict:
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"""Convert to dictionary for JSON serialization."""
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return {
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'latitude': self.latitude,
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'longitude': self.longitude,
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'altitude': self.altitude,
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'speed': self.speed,
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'heading': self.heading,
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'climb': self.climb,
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'satellites': self.satellites,
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'fix_quality': self.fix_quality,
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'timestamp': self.timestamp.isoformat() if self.timestamp else None,
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'device': self.device,
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'epx': self.epx,
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'epy': self.epy,
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'epv': self.epv,
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'eps': self.eps,
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'ept': self.ept,
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}
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def _classify_constellation(prn: int, gnssid: int | None = None) -> str:
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"""Classify satellite constellation from PRN or gnssid."""
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if gnssid is not None:
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mapping = {
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0: 'GPS', 1: 'SBAS', 2: 'Galileo', 3: 'BeiDou',
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4: 'IMES', 5: 'QZSS', 6: 'GLONASS', 7: 'NavIC',
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}
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return mapping.get(gnssid, 'GPS')
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# Fall back to PRN range heuristic
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if 1 <= prn <= 32:
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return 'GPS'
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elif 33 <= prn <= 64:
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return 'SBAS'
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elif 65 <= prn <= 96:
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return 'GLONASS'
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elif 120 <= prn <= 158:
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return 'SBAS'
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elif 201 <= prn <= 264:
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return 'BeiDou'
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elif 301 <= prn <= 336:
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return 'Galileo'
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elif 193 <= prn <= 200:
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return 'QZSS'
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return 'GPS'
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class GPSDClient:
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"""
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Connects to gpsd daemon for GPS data.
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gpsd provides a unified interface for GPS devices and handles
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device management, making it ideal when gpsd is already running.
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"""
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DEFAULT_HOST = 'localhost'
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DEFAULT_PORT = 2947
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def __init__(self, host: str = DEFAULT_HOST, port: int = DEFAULT_PORT):
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self.host = host
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self.port = port
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self._position: GPSPosition | None = None
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self._sky: GPSSkyData | None = None
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self._lock = threading.Lock()
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self._running = False
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self._thread: threading.Thread | None = None
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self._socket: _socket_mod.socket | None = None
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self._last_update: datetime | None = None
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self._error: str | None = None
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self._callbacks: list[Callable[[GPSPosition], None]] = []
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self._sky_callbacks: list[Callable[[GPSSkyData], None]] = []
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self._device: str | None = None
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@property
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def position(self) -> GPSPosition | None:
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"""Get the current GPS position."""
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with self._lock:
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return self._position
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@property
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def sky(self) -> GPSSkyData | None:
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"""Get the current sky view data."""
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with self._lock:
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return self._sky
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@property
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def is_running(self) -> bool:
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"""Check if the client is running."""
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return self._running
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@property
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def last_update(self) -> datetime | None:
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"""Get the time of the last position update."""
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with self._lock:
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return self._last_update
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@property
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def error(self) -> str | None:
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"""Get any error message."""
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with self._lock:
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return self._error
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@property
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def device_path(self) -> str:
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"""Return gpsd connection info."""
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return f"gpsd://{self.host}:{self.port}"
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def add_callback(self, callback: Callable[[GPSPosition], None]) -> None:
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"""Add a callback to be called on position updates."""
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if callback not in self._callbacks:
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self._callbacks.append(callback)
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def remove_callback(self, callback: Callable[[GPSPosition], None]) -> None:
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"""Remove a position update callback."""
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if callback in self._callbacks:
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self._callbacks.remove(callback)
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def add_sky_callback(self, callback: Callable[[GPSSkyData], None]) -> None:
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"""Add a callback to be called on sky data updates."""
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if callback not in self._sky_callbacks:
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self._sky_callbacks.append(callback)
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def remove_sky_callback(self, callback: Callable[[GPSSkyData], None]) -> None:
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"""Remove a sky data update callback."""
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if callback in self._sky_callbacks:
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self._sky_callbacks.remove(callback)
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def start(self) -> bool:
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"""Start receiving GPS data from gpsd."""
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import socket
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if self._running:
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return True
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try:
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self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self._socket.settimeout(5.0)
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self._socket.connect((self.host, self.port))
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# Enable JSON watch mode
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watch_cmd = '?WATCH={"enable":true,"json":true}\n'
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self._socket.send(watch_cmd.encode('ascii'))
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self._running = True
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self._error = None
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self._thread = threading.Thread(target=self._read_loop, daemon=True)
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self._thread.start()
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logger.info(f"Connected to gpsd at {self.host}:{self.port}")
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print(f"[GPS] Connected to gpsd at {self.host}:{self.port}", flush=True)
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return True
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except Exception as e:
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self._error = str(e)
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logger.error(f"Failed to connect to gpsd at {self.host}:{self.port}: {e}")
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if self._socket:
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with contextlib.suppress(Exception):
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self._socket.close()
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self._socket = None
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return False
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def stop(self) -> None:
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"""Stop receiving GPS data."""
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self._running = False
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if self._socket:
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try:
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# Disable watch mode
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self._socket.send(b'?WATCH={"enable":false}\n')
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self._socket.close()
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except Exception:
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pass
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self._socket = None
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if self._thread:
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self._thread.join(timeout=2.0)
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self._thread = None
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logger.info(f"Disconnected from gpsd at {self.host}:{self.port}")
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def _read_loop(self) -> None:
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"""Background thread loop for reading gpsd data."""
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import json
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import socket
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buffer = ""
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message_count = 0
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print("[GPS] gpsd read loop started", flush=True)
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while self._running and self._socket:
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try:
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self._socket.settimeout(1.0)
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data = self._socket.recv(4096)
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if not data:
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logger.warning("gpsd connection closed")
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with self._lock:
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self._error = "Connection closed by gpsd"
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break
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buffer += data.decode('ascii', errors='ignore')
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# Process complete JSON lines
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while '\n' in buffer:
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line, buffer = buffer.split('\n', 1)
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line = line.strip()
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if not line:
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continue
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try:
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msg = json.loads(line)
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msg_class = msg.get('class', '')
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message_count += 1
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if message_count <= 5 or message_count % 20 == 0:
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print(f"[GPS] gpsd msg [{message_count}]: {msg_class}", flush=True)
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if msg_class == 'TPV':
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self._handle_tpv(msg)
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elif msg_class == 'SKY':
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self._handle_sky(msg)
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elif msg_class == 'DEVICES':
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# Track connected device
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devices = msg.get('devices', [])
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if devices:
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self._device = devices[0].get('path', 'unknown')
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print(f"[GPS] gpsd device: {self._device}", flush=True)
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except json.JSONDecodeError:
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logger.debug(f"Invalid JSON from gpsd: {line[:50]}")
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except Exception as parse_err:
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logger.error(f"Error handling gpsd {msg_class} message: {parse_err}")
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except socket.timeout:
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continue
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except Exception as e:
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logger.error(f"gpsd read error: {e}")
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with self._lock:
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self._error = str(e)
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break
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def _handle_tpv(self, msg: dict) -> None:
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"""Handle TPV (Time-Position-Velocity) message from gpsd."""
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# mode: 0=unknown, 1=no fix, 2=2D fix, 3=3D fix
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mode = msg.get('mode', 0)
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if mode < 2:
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# No fix yet
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return
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lat = msg.get('lat')
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lon = msg.get('lon')
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if lat is None or lon is None:
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return
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# Parse timestamp
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timestamp = None
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time_str = msg.get('time')
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if time_str:
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with contextlib.suppress(ValueError, AttributeError):
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# gpsd uses ISO format: 2024-01-01T12:00:00.000Z
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timestamp = datetime.fromisoformat(time_str.replace('Z', '+00:00'))
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position = GPSPosition(
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latitude=lat,
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longitude=lon,
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altitude=msg.get('alt'),
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speed=msg.get('speed'), # m/s in gpsd
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heading=msg.get('track'),
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climb=msg.get('climb'),
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fix_quality=mode,
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timestamp=timestamp,
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device=self._device or f"gpsd://{self.host}:{self.port}",
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epx=msg.get('epx'),
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epy=msg.get('epy'),
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epv=msg.get('epv'),
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eps=msg.get('eps'),
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ept=msg.get('ept'),
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)
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print(f"[GPS] gpsd FIX: {lat:.6f}, {lon:.6f} (mode: {mode})", flush=True)
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self._update_position(position)
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def _handle_sky(self, msg: dict) -> None:
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"""Handle SKY (satellite sky view) message from gpsd.
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gpsd sends multiple SKY messages per cycle: some contain only DOP
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values while others include the full satellites array. When a
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DOP-only SKY arrives, preserve the most recent satellite list
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instead of overwriting it with an empty one.
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"""
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raw_sats = msg.get('satellites', [])
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has_satellites = len(raw_sats) > 0
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if has_satellites:
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sats = []
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for sat in raw_sats:
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prn = sat.get('PRN', 0)
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gnssid = sat.get('gnssid')
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sats.append(GPSSatellite(
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prn=prn,
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elevation=sat.get('el'),
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azimuth=sat.get('az'),
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snr=sat.get('ss'),
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used=sat.get('used', False),
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constellation=_classify_constellation(prn, gnssid),
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))
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else:
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# DOP-only SKY message — keep existing satellites
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with self._lock:
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sats = list(self._sky.satellites) if self._sky else []
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sky_data = GPSSkyData(
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satellites=sats,
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hdop=msg.get('hdop'),
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vdop=msg.get('vdop'),
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pdop=msg.get('pdop'),
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tdop=msg.get('tdop'),
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gdop=msg.get('gdop'),
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xdop=msg.get('xdop'),
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ydop=msg.get('ydop'),
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nsat=len(sats),
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usat=sum(1 for s in sats if s.used),
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)
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with self._lock:
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self._sky = sky_data
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# Notify sky callbacks
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for callback in self._sky_callbacks:
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try:
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callback(sky_data)
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except Exception as e:
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logger.error(f"GPS sky callback error: {e}")
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def _update_position(self, position: GPSPosition) -> None:
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"""Update the current position and notify callbacks."""
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with self._lock:
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self._position = position
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self._last_update = datetime.utcnow()
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self._error = None
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# Notify callbacks
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for callback in self._callbacks:
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try:
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callback(position)
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except Exception as e:
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logger.error(f"GPS callback error: {e}")
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# Global GPS client instance
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_gps_client: GPSDClient | None = None
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_gps_lock = threading.Lock()
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def get_gps_reader() -> GPSDClient | None:
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"""Get the global GPS client instance."""
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with _gps_lock:
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return _gps_client
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def start_gpsd(host: str = 'localhost', port: int = 2947,
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callback: Callable[[GPSPosition], None] | None = None,
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sky_callback: Callable[[GPSSkyData], None] | None = None) -> bool:
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"""
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Start the global GPS client connected to gpsd.
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Args:
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host: gpsd host (default localhost)
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port: gpsd port (default 2947)
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callback: Optional callback for position updates
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sky_callback: Optional callback for sky data updates
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Returns:
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True if started successfully
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"""
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global _gps_client
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with _gps_lock:
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# Stop existing client if any
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if _gps_client:
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_gps_client.stop()
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_gps_client = GPSDClient(host, port)
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# Register callbacks BEFORE starting to avoid race condition
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if callback:
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_gps_client.add_callback(callback)
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if sky_callback:
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_gps_client.add_sky_callback(sky_callback)
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return _gps_client.start()
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def stop_gps() -> None:
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"""Stop the global GPS client."""
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global _gps_client
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with _gps_lock:
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if _gps_client:
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_gps_client.stop()
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_gps_client = None
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def get_current_position() -> GPSPosition | None:
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"""Get the current GPS position from the global client."""
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client = get_gps_reader()
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if client:
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return client.position
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return None
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# ============================================
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# GPS device detection and gpsd auto-start
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# ============================================
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_gpsd_process: subprocess.Popen | None = None
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_gpsd_process_lock = threading.RLock()
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def detect_gps_devices() -> list[dict]:
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"""
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Detect connected GPS serial devices.
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Returns list of dicts with 'path' and 'description' keys.
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"""
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import glob
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import os
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import platform
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devices: list[dict] = []
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system = platform.system()
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if system == 'Linux':
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# Common USB GPS device paths
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patterns = ['/dev/ttyUSB*', '/dev/ttyACM*']
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for pattern in patterns:
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for path in sorted(glob.glob(pattern)):
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desc = _describe_device_linux(path)
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devices.append({'path': path, 'description': desc})
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# Also check /dev/serial/by-id for descriptive names
|
|
serial_dir = '/dev/serial/by-id'
|
|
if os.path.isdir(serial_dir):
|
|
for name in sorted(os.listdir(serial_dir)):
|
|
full = os.path.join(serial_dir, name)
|
|
real = os.path.realpath(full)
|
|
# Skip if we already found this device
|
|
if any(d['path'] == real for d in devices):
|
|
# Update description with the more descriptive name
|
|
for d in devices:
|
|
if d['path'] == real:
|
|
d['description'] = name
|
|
continue
|
|
devices.append({'path': real, 'description': name})
|
|
|
|
elif system == 'Darwin':
|
|
# macOS: USB serial devices (prefer cu. over tty. for outgoing)
|
|
patterns = ['/dev/cu.usbmodem*', '/dev/cu.usbserial*']
|
|
for pattern in patterns:
|
|
for path in sorted(glob.glob(pattern)):
|
|
desc = _describe_device_macos(path)
|
|
devices.append({'path': path, 'description': desc})
|
|
|
|
# Sort: devices with GPS-related descriptions first
|
|
gps_keywords = ('gps', 'gnss', 'u-blox', 'ublox', 'nmea', 'sirf', 'navigation')
|
|
devices.sort(key=lambda d: (
|
|
0 if any(k in d['description'].lower() for k in gps_keywords) else 1
|
|
))
|
|
|
|
return devices
|
|
|
|
|
|
def _describe_device_linux(path: str) -> str:
|
|
"""Get a human-readable description of a Linux serial device."""
|
|
import os
|
|
basename = os.path.basename(path)
|
|
# Try to read from sysfs
|
|
try:
|
|
# /sys/class/tty/ttyUSB0/device/../product
|
|
sysfs = f'/sys/class/tty/{basename}/device/../product'
|
|
if os.path.exists(sysfs):
|
|
with open(sysfs) as f:
|
|
return f.read().strip()
|
|
except Exception:
|
|
pass
|
|
return basename
|
|
|
|
|
|
def _describe_device_macos(path: str) -> str:
|
|
"""Get a description of a macOS serial device."""
|
|
import os
|
|
return os.path.basename(path)
|
|
|
|
|
|
def is_gpsd_running(host: str = 'localhost', port: int = 2947) -> bool:
|
|
"""Check if gpsd is reachable."""
|
|
import socket
|
|
try:
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
sock.settimeout(1.0)
|
|
sock.connect((host, port))
|
|
sock.close()
|
|
return True
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
def start_gpsd_daemon(device_path: str, host: str = 'localhost',
|
|
port: int = 2947) -> tuple[bool, str]:
|
|
"""
|
|
Start gpsd daemon pointing at the given device.
|
|
|
|
Returns (success, message) tuple.
|
|
"""
|
|
import shutil
|
|
import subprocess
|
|
|
|
global _gpsd_process
|
|
|
|
with _gpsd_process_lock:
|
|
# Already running?
|
|
if is_gpsd_running(host, port):
|
|
return True, 'gpsd already running'
|
|
|
|
gpsd_bin = shutil.which('gpsd')
|
|
if not gpsd_bin:
|
|
return False, 'gpsd not installed'
|
|
|
|
# Stop any existing managed process
|
|
stop_gpsd_daemon()
|
|
|
|
try:
|
|
import os
|
|
if not os.path.exists(device_path):
|
|
return False, f'Device {device_path} not found'
|
|
|
|
cmd = [gpsd_bin, '-N', '-n', '-S', str(port), device_path]
|
|
logger.info(f"Starting gpsd: {' '.join(cmd)}")
|
|
print(f"[GPS] Starting gpsd: {' '.join(cmd)}", flush=True)
|
|
|
|
_gpsd_process = subprocess.Popen(
|
|
cmd,
|
|
stdout=subprocess.DEVNULL,
|
|
stderr=subprocess.PIPE,
|
|
)
|
|
|
|
# Give gpsd a moment to start
|
|
import time
|
|
time.sleep(1.5)
|
|
|
|
if _gpsd_process.poll() is not None:
|
|
stderr = ''
|
|
if _gpsd_process.stderr:
|
|
stderr = _gpsd_process.stderr.read().decode('utf-8', errors='ignore').strip()
|
|
msg = f'gpsd exited with code {_gpsd_process.returncode}'
|
|
if stderr:
|
|
msg += f': {stderr}'
|
|
return False, msg
|
|
|
|
# Verify it's listening
|
|
if is_gpsd_running(host, port):
|
|
return True, f'gpsd started on {device_path}'
|
|
else:
|
|
return False, 'gpsd started but not accepting connections'
|
|
|
|
except Exception as e:
|
|
logger.error(f"Failed to start gpsd: {e}")
|
|
return False, str(e)
|
|
|
|
|
|
def stop_gpsd_daemon() -> None:
|
|
"""Stop the managed gpsd daemon process."""
|
|
global _gpsd_process
|
|
|
|
with _gpsd_process_lock:
|
|
if _gpsd_process and _gpsd_process.poll() is None:
|
|
try:
|
|
_gpsd_process.terminate()
|
|
_gpsd_process.wait(timeout=3.0)
|
|
except Exception:
|
|
with contextlib.suppress(Exception):
|
|
_gpsd_process.kill()
|
|
logger.info("Stopped gpsd daemon")
|
|
print("[GPS] Stopped gpsd daemon", flush=True)
|
|
_gpsd_process = None
|