92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
import logging
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from contextlib import asynccontextmanager
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from fastapi import FastAPI, Header, HTTPException
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from pydantic import BaseModel
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from . import db
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from .config import COLLECTIONS, SYNC_TOKEN
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logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
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log = logging.getLogger("app")
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@asynccontextmanager
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async def lifespan(_app):
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if not SYNC_TOKEN:
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log.warning("SYNC_TOKEN ist leer, jede Anfrage wird abgelehnt.")
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db.init()
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yield
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app = FastAPI(title="Desktop Sync", lifespan=lifespan)
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def check_token(authorization: str):
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if not SYNC_TOKEN or authorization != f"Bearer {SYNC_TOKEN}":
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raise HTTPException(status_code=401, detail="Token fehlt oder ist falsch")
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class SyncIn(BaseModel):
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since: int = 0
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events: list[dict] = []
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todos: list[dict] = []
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notes: list[dict] = []
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@app.get("/api/health")
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def health():
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return {"ok": True}
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@app.post("/api/sync")
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def sync(body: SyncIn, authorization: str = Header(default="")):
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"""Nimmt Änderungen des Clients an und gibt alles zurück, was sich seit seinem Stand geändert hat.
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Konflikte: der Eintrag mit dem neueren updated gewinnt. Verliert der Client, bekommt er den
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Server-Stand zurück. Die Antwort enthält auch die gerade angenommenen Einträge; der Client
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erkennt sie am gleichen updated und überspringt sie.
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"""
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check_token(authorization)
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with db.connect() as conn:
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accepted = 0
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rejected = {collection: [] for collection in COLLECTIONS}
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for collection in COLLECTIONS:
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for item in getattr(body, collection):
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ok, stored = db.merge(conn, collection, item)
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if ok:
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accepted += 1
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else:
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rejected[collection].append(stored)
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out = {}
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for collection in COLLECTIONS:
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changed = db.since(conn, collection, body.since)
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ids = {item["id"] for item in changed}
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out[collection] = changed + [item for item in rejected[collection] if item["id"] not in ids]
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out["cursor"] = db.cursor(conn)
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if accepted:
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log.info("sync: %d Einträge übernommen", accepted)
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return out
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# Lesezugriff für andere Anwendungen
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@app.get("/api/events")
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def events(authorization: str = Header(default="")):
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check_token(authorization)
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with db.connect() as conn:
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return db.alive(conn, "events")
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@app.get("/api/todos")
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def todos(authorization: str = Header(default="")):
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check_token(authorization)
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with db.connect() as conn:
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return db.alive(conn, "todos")
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@app.get("/api/notes")
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def notes(authorization: str = Header(default="")):
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check_token(authorization)
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with db.connect() as conn:
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return db.alive(conn, "notes")
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