File size: 2,202 Bytes
c87117f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | import logging
import sys
from contextlib import asynccontextmanager
from pathlib import Path
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
sys.path.insert(0, str(Path(__file__).resolve().parent))
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
PROJECT_ROOT = Path(__file__).resolve().parent.parent
GRAPHRAG_ROOT = PROJECT_ROOT / "graphrag_input"
@asynccontextmanager
async def lifespan(app: FastAPI):
logger.info(f"Loading GraphRAG engine from {GRAPHRAG_ROOT} ...")
try:
from query_engine import init_engine
init_engine(str(GRAPHRAG_ROOT))
logger.info("GraphRAG engine ready ✅")
except Exception as e:
logger.error(f"Engine load failed (queries will return 503): {e}")
yield
logger.info("Shutdown")
app = FastAPI(
title="K-Drama GraphRAG API",
description="Persistent in-memory GraphRAG over 1637 K-dramas",
version="2.0.0",
lifespan=lifespan,
)
class QueryRequest(BaseModel):
question: str
method: str = "global"
class QueryResponse(BaseModel):
question: str
method: str
answer: str
@app.get("/")
def root():
try:
from query_engine import get_engine
loaded = get_engine()._loaded
except Exception:
loaded = False
return {"status": "running", "engine_loaded": loaded}
@app.get("/health")
def health():
return {"status": "ok"}
@app.post("/query", response_model=QueryResponse)
def query(request: QueryRequest):
if request.method not in ["global", "local"]:
raise HTTPException(400, "method must be 'global' or 'local'")
if not request.question.strip():
raise HTTPException(400, "question cannot be empty")
try:
from query_engine import get_engine
answer = get_engine().query_sync(request.question, request.method)
return QueryResponse(
question=request.question,
method=request.method,
answer=answer,
)
except RuntimeError as e:
raise HTTPException(503, f"Engine not ready: {e}")
except Exception as e:
logger.exception("Query failed")
raise HTTPException(500, str(e)) |