Initial commit: gmTouringMiniApp project

files/归档/server/app/main.py

@@ -0,0 +1,83 @@
+from __future__ import annotations
+
+import os
+
+from fastapi import FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+
+from .knowledge import KnowledgeBase
+from .llm import LLMError, LLMService, LLMTimeout
+from .planner import PlannerService, SessionStore
+from .schemas import HealthResponse, MessageRequest, PlanResponse, TravelPreferences
+
+
+try:
+    from dotenv import load_dotenv
+
+    load_dotenv()
+except ImportError:
+    # Mock mode can run without python-dotenv; production installs project deps.
+    pass
+
+knowledge = KnowledgeBase()
+llm = LLMService(knowledge)
+planner = PlannerService(knowledge, llm, SessionStore())
+
+app = FastAPI(
+    title="光明区文旅行程助手 API",
+    version="0.1.0",
+    description="POC：本地知识检索 + OpenAI 兼容模型 + 内存会话",
+)
+origins = [
+    origin.strip()
+    for origin in os.getenv(
+        "CORS_ORIGINS", "http://localhost:5173,http://127.0.0.1:5173"
+    ).split(",")
+    if origin.strip()
+]
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=origins,
+    allow_credentials=False,
+    allow_methods=["GET", "POST"],
+    allow_headers=["*"],
+)
+
+
+@app.get("/api/v1/health", response_model=HealthResponse)
+async def health() -> HealthResponse:
+    return HealthResponse(
+        status="ok",
+        llm_mode=llm.mode,
+        model_configured=llm.configured,
+        knowledge_count=knowledge.count,
+    )
+
+
+@app.post("/api/v1/plans", response_model=PlanResponse)
+async def create_plan(preferences: TravelPreferences) -> PlanResponse:
+    try:
+        return await planner.create(preferences)
+    except LookupError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+    except LLMTimeout as exc:
+        raise HTTPException(status_code=504, detail=str(exc)) from exc
+    except (LLMError, ValueError) as exc:
+        raise HTTPException(status_code=502, detail=str(exc)) from exc
+
+
+@app.post(
+    "/api/v1/conversations/{conversation_id}/messages",
+    response_model=PlanResponse,
+)
+async def adjust_plan(
+    conversation_id: str, request: MessageRequest
+) -> PlanResponse:
+    try:
+        return await planner.adjust(conversation_id, request.message)
+    except LookupError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+    except LLMTimeout as exc:
+        raise HTTPException(status_code=504, detail=str(exc)) from exc
+    except (LLMError, ValueError) as exc:
+        raise HTTPException(status_code=502, detail=str(exc)) from exc