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"""Serves the Lilac server."""
import logging
import os
from contextlib import asynccontextmanager
from typing import Any, AsyncIterator
from fastapi import APIRouter, FastAPI
from fastapi.responses import ORJSONResponse
from fastapi.routing import APIRoute
from fastapi.staticfiles import StaticFiles
from huggingface_hub import snapshot_download
from . import router_concept, router_data_loader, router_dataset, router_signal, router_tasks
from .config import data_path
from .router_utils import RouteErrorHandler
from .tasks import task_manager
DIST_PATH = os.path.abspath(os.path.join('web', 'blueprint', 'build'))
tags_metadata: list[dict[str, Any]] = [{
'name': 'datasets',
'description': 'API for querying a dataset.',
}, {
'name': 'concepts',
'description': 'API for managing concepts.',
}, {
'name': 'data_loaders',
'description': 'API for loading data.',
}, {
'name': 'signals',
'description': 'API for managing signals.',
}]
def custom_generate_unique_id(route: APIRoute) -> str:
"""Generate the name for the API endpoint."""
return route.name
app = FastAPI(
default_response_class=ORJSONResponse,
generate_unique_id_function=custom_generate_unique_id,
openapi_tags=tags_metadata)
v1_router = APIRouter(route_class=RouteErrorHandler)
v1_router.include_router(router_dataset.router, prefix='/datasets', tags=['datasets'])
v1_router.include_router(router_concept.router, prefix='/concepts', tags=['concepts'])
v1_router.include_router(router_data_loader.router, prefix='/data_loaders', tags=['data_loaders'])
v1_router.include_router(router_signal.router, prefix='/signals', tags=['signals'])
v1_router.include_router(router_tasks.router, prefix='/tasks', tags=['tasks'])
app.include_router(v1_router, prefix='/api/v1')
# Serve static files in production mode.
app.mount('/', StaticFiles(directory=os.path.join(DIST_PATH), html=True, check_dir=False))
@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncIterator[None]:
"""The lifespan hook for the server."""
# Setup.
snapshot_download(repo_id='lilacai/nikhil_staging', repo_type='space', local_dir=data_path())
yield
# Teardown.
@app.on_event('shutdown')
async def shutdown_event() -> None:
"""Kill the task manager when FastAPI shuts down."""
await task_manager().stop()
class GetTasksFilter(logging.Filter):
"""Task filter for /tasks."""
def filter(self, record: logging.LogRecord) -> bool:
"""Filters out /api/v1/tasks/ from the logs."""
return record.getMessage().find('/api/v1/tasks/') == -1
logging.getLogger('uvicorn.access').addFilter(GetTasksFilter())
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