IQ.Pilot Release Commit @ bec7652
This commit is contained in:
IQ.Lvbs history cleanup
318
iqpilot/iq_maps/tile_bundle_downloader.py
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318
iqpilot/iq_maps/tile_bundle_downloader.py
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#!/usr/bin/env python3
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"""
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Copyright © IQ.Lvbs, apart of Project Teal Lvbs, All Rights Reserved, licensed under https://konn3kt.com/tos
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"""
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import hashlib
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import json
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import platform
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import threading
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import time
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from pathlib import Path
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import requests
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from iqpilot.common.params import Params
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from iqpilot.common.swaglog import cloudlog
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from iqpilot.ui.onroad.offline_tiles import offline_map_root
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try:
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from iqpilot.iq_maps.tiles_auth import get_base_urls as _private_base_urls, get_requests_auth as _private_auth
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except Exception: # ProprietaryModuleMissing or import errors in stripped builds
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_private_base_urls = None
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_private_auth = None
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DEFAULT_TILE_BUNDLE_BASE_URL = "https://maps.konn3kt.com/iqosmd/v1"
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BASE_URL_PARAM = "OfflineTilesBaseUrl"
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PROGRESS_PARAM = "OfflineTilesDownloadProgress"
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REQUEST_PARAM = "OfflineTilesDownloadRequest"
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CHUNK_BYTES = 1 << 20
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HTTP_TIMEOUT_S = 30.0
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STREAM_RETRIES = 8
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def candidate_base_urls(params: Params) -> list[str]:
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override = params.get(BASE_URL_PARAM)
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if isinstance(override, bytes):
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override = override.decode("utf-8", errors="ignore")
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override = (override or "").strip()
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if override:
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return [override.rstrip("/")]
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urls: list[str] = []
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if _private_base_urls is not None:
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try:
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urls.extend(url.rstrip("/") for url in _private_base_urls())
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except Exception:
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pass
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urls.append(DEFAULT_TILE_BUNDLE_BASE_URL)
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return urls
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def request_auth() -> tuple[str, str] | None:
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if _private_auth is None:
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return None
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try:
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return _private_auth()
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except Exception:
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return None
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def fetch_index(base_url: str, session: requests.Session) -> dict:
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response = session.get(f"{base_url}/index.json", timeout=HTTP_TIMEOUT_S, auth=request_auth())
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response.raise_for_status()
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index = response.json()
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regions = index.get("regions")
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if not isinstance(regions, dict):
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raise ValueError("tile bundle index has no regions")
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return regions
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def region_bundle_dir(selector: str) -> Path:
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return offline_map_root() / "regions" / selector
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def region_bundle_path(selector: str) -> Path:
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return region_bundle_dir(selector) / "tiles" / "offline.mbtiles"
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def region_bundle_installed(selector: str) -> bool:
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return region_bundle_path(selector).exists()
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def installed_region_selectors() -> list[str]:
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regions_root = offline_map_root() / "regions"
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if not regions_root.exists():
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return []
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return sorted(
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child.name for child in regions_root.iterdir()
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if child.is_dir() and (child / "tiles" / "offline.mbtiles").exists()
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)
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def _hash_existing(path: Path) -> tuple["hashlib._Hash", int]:
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digest = hashlib.sha256()
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size = 0
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with open(path, "rb") as f:
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while True:
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chunk = f.read(CHUNK_BYTES)
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if not chunk:
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break
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digest.update(chunk)
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size += len(chunk)
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return digest, size
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def _write_manifest(selector: str, entry: dict) -> None:
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manifest = {
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"region": selector,
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"version": entry.get("version", ""),
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"mbtiles": {
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"bounds": entry.get("bounds", ""),
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"minzoom": entry.get("minzoom"),
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"maxzoom": entry.get("maxzoom"),
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"bytes": entry.get("bytes"),
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"sha256": entry.get("sha256", ""),
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},
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}
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if entry.get("day_path"):
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manifest["mbtiles_day"] = {
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"bytes": entry.get("day_bytes"),
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"sha256": entry.get("day_sha256", ""),
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}
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manifest_path = region_bundle_dir(selector) / "manifest.json"
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manifest_path.parent.mkdir(parents=True, exist_ok=True)
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manifest_path.write_text(json.dumps(manifest, indent=2))
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class TileBundleDownloader:
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def __init__(self, params: Params | None = None, mem_params: Params | None = None,
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abort_check=None):
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self.params = params if params is not None else Params()
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if mem_params is not None:
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self.mem_params = mem_params
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else:
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self.mem_params = Params("/dev/shm/params") if platform.system() != "Darwin" else self.params
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self.session = requests.Session()
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self._cancelled = threading.Event()
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self._abort_check = abort_check
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def cancel(self) -> None:
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self._cancelled.set()
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def _should_abort(self) -> bool:
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if self._cancelled.is_set():
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return True
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if not self.mem_params.get(REQUEST_PARAM):
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self._cancelled.set()
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return True
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if self._abort_check is not None and self._abort_check():
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self._cancelled.set()
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return True
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return False
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def _publish_progress(self, region: str, downloaded: int, total: int, active: bool) -> None:
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self.mem_params.put(PROGRESS_PARAM, {
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"active": active,
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"region": region,
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"downloaded_bytes": int(downloaded),
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"total_bytes": int(total),
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})
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def _download_one(self, selector: str, entry: dict, base_url: str,
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progress_offset: int, progress_total: int) -> bool:
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night_path = region_bundle_path(selector)
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ok = self._download_file(
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selector, base_url, entry["path"], int(entry.get("bytes", 0)),
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str(entry.get("sha256", "")).strip().lower(), night_path,
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progress_offset, progress_total,
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)
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if not ok:
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return False
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if entry.get("day_path"):
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day_ok = self._download_file(
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selector, base_url, entry["day_path"], int(entry.get("day_bytes", 0)),
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str(entry.get("day_sha256", "")).strip().lower(),
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night_path.with_name("offline_day.mbtiles"),
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progress_offset + int(entry.get("bytes", 0)), progress_total,
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)
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if not day_ok:
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cloudlog.warning(f"iq_maps: day-style bundle failed for {selector}; night set installed")
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_write_manifest(selector, entry)
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cloudlog.info(f"iq_maps: installed tile bundle {selector}")
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return True
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def _download_file(self, selector: str, base_url: str, remote_path: str, expected_bytes: int,
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expected_sha: str, final_path: Path,
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progress_offset: int, progress_total: int) -> bool:
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url = f"{base_url}/{remote_path.lstrip('/')}"
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part_path = final_path.with_name(final_path.name + ".part")
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part_path.parent.mkdir(parents=True, exist_ok=True)
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downloaded = 0
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digest = hashlib.sha256()
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last_error: Exception | None = None
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for attempt in range(STREAM_RETRIES):
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if self._should_abort():
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cloudlog.warning(f"iq_maps: tile bundle download cancelled for {selector}")
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return False
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if attempt:
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time.sleep(min(30.0, 2.0 * attempt))
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try:
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digest = hashlib.sha256()
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resume_from = 0
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if part_path.exists():
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digest, resume_from = _hash_existing(part_path)
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if expected_bytes and resume_from > expected_bytes:
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part_path.unlink()
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digest = hashlib.sha256()
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resume_from = 0
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headers = {"Range": f"bytes={resume_from}-"} if resume_from else {}
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auth = request_auth()
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response = self.session.get(url, headers=headers, stream=True, timeout=HTTP_TIMEOUT_S, auth=auth)
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if resume_from and response.status_code != 206:
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digest = hashlib.sha256()
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resume_from = 0
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part_path.unlink(missing_ok=True)
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if response.status_code == 416:
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response = self.session.get(url, stream=True, timeout=HTTP_TIMEOUT_S, auth=auth)
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response.raise_for_status()
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downloaded = resume_from
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mode = "ab" if resume_from else "wb"
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with open(part_path, mode) as f:
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for chunk in response.iter_content(chunk_size=CHUNK_BYTES):
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if self._should_abort():
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cloudlog.warning(f"iq_maps: tile bundle download cancelled for {selector}")
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return False
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f.write(chunk)
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digest.update(chunk)
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downloaded += len(chunk)
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self._publish_progress(selector, progress_offset + downloaded, progress_total, active=True)
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break
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except requests.RequestException as exc:
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last_error = exc
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cloudlog.warning(f"iq_maps: tile bundle stream interrupted for {selector} "
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+ f"(attempt {attempt + 1}/{STREAM_RETRIES}): {exc}")
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else:
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raise requests.RequestException(f"stream failed after {STREAM_RETRIES} attempts") from last_error
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if expected_bytes and downloaded != expected_bytes:
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cloudlog.error(f"iq_maps: tile bundle size mismatch for {selector}: {downloaded} != {expected_bytes}")
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part_path.unlink(missing_ok=True)
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return False
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if expected_sha and digest.hexdigest() != expected_sha:
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cloudlog.error(f"iq_maps: tile bundle sha256 mismatch for {selector}")
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part_path.unlink(missing_ok=True)
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return False
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part_path.replace(final_path)
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return True
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def download_regions(self, selectors: list[str]) -> bool:
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self._cancelled.clear()
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ok = True
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try:
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self.mem_params.put(REQUEST_PARAM, {"regions": list(selectors)})
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regions = None
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base_url = ""
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for candidate in candidate_base_urls(self.params):
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try:
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regions = fetch_index(candidate, self.session)
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base_url = candidate
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break
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except (requests.RequestException, ValueError, json.JSONDecodeError):
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cloudlog.warning(f"iq_maps: tile bundle index unavailable at {candidate}")
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if regions is None:
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cloudlog.error("iq_maps: no tile bundle host reachable")
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return False
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wanted: list[tuple[str, dict]] = []
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for selector in selectors:
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entry = regions.get(selector)
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if entry is None:
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cloudlog.warning(f"iq_maps: no tile bundle published for {selector}")
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ok = False
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continue
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if region_bundle_installed(selector) and self._installed_matches(selector, entry):
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continue
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wanted.append((selector, entry))
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progress_total = sum(int(entry.get("bytes", 0)) + int(entry.get("day_bytes", 0)) for _, entry in wanted)
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progress_offset = 0
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for selector, entry in wanted:
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if self._should_abort():
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return False
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try:
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if not self._download_one(selector, entry, base_url, progress_offset, progress_total):
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ok = False
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except (requests.RequestException, OSError):
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cloudlog.exception(f"iq_maps: tile bundle download failed for {selector}")
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ok = False
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progress_offset += int(entry.get("bytes", 0)) + int(entry.get("day_bytes", 0))
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return ok
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finally:
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self._publish_progress("", 0, 0, active=False)
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try:
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self.mem_params.remove(REQUEST_PARAM)
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except Exception:
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pass
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@staticmethod
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def _installed_matches(selector: str, entry: dict) -> bool:
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manifest_path = region_bundle_dir(selector) / "manifest.json"
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try:
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manifest = json.loads(manifest_path.read_text())
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except (OSError, json.JSONDecodeError):
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return False
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installed_sha = str(manifest.get("mbtiles", {}).get("sha256", "")).strip().lower()
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expected_sha = str(entry.get("sha256", "")).strip().lower()
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if not expected_sha or installed_sha != expected_sha:
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return False
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if entry.get("day_path"):
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day_file = region_bundle_dir(selector) / "tiles" / "offline_day.mbtiles"
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installed_day = str(manifest.get("mbtiles_day", {}).get("sha256", "")).strip().lower()
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expected_day = str(entry.get("day_sha256", "")).strip().lower()
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if not day_file.exists() or installed_day != expected_day:
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return False
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return True
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