191 lines
8.4 KiB
Python
Executable File
191 lines
8.4 KiB
Python
Executable File
# [DEF:AppModule:Module]
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# @SEMANTICS: app, main, entrypoint, fastapi
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# @PURPOSE: The main entry point for the FastAPI application. It initializes the app, configures CORS, sets up dependencies, includes API routers, and defines the WebSocket endpoint for log streaming.
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# @LAYER: UI (API)
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# @RELATION: Depends on the dependency module and API route modules.
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import sys
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from pathlib import Path
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# project_root is used for static files mounting
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project_root = Path(__file__).resolve().parent.parent.parent
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from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Depends, Request, HTTPException
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.staticfiles import StaticFiles
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from fastapi.responses import FileResponse
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import asyncio
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import os
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from .dependencies import get_task_manager, get_scheduler_service
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from .core.logger import logger, belief_scope
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from .api.routes import plugins, tasks, settings, environments, mappings, migration, connections, git, storage
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from .core.database import init_db
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# [DEF:App:Global]
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# @SEMANTICS: app, fastapi, instance
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# @PURPOSE: The global FastAPI application instance.
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app = FastAPI(
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title="Superset Tools API",
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description="API for managing Superset automation tools and plugins.",
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version="1.0.0",
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)
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# [/DEF:App:Global]
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# [DEF:startup_event:Function]
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# @PURPOSE: Handles application startup tasks, such as starting the scheduler.
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# @PRE: None.
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# @POST: Scheduler is started.
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# Startup event
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@app.on_event("startup")
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async def startup_event():
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with belief_scope("startup_event"):
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scheduler = get_scheduler_service()
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scheduler.start()
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# [/DEF:startup_event:Function]
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# [DEF:shutdown_event:Function]
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# @PURPOSE: Handles application shutdown tasks, such as stopping the scheduler.
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# @PRE: None.
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# @POST: Scheduler is stopped.
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# Shutdown event
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@app.on_event("shutdown")
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async def shutdown_event():
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with belief_scope("shutdown_event"):
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scheduler = get_scheduler_service()
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scheduler.stop()
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# [/DEF:shutdown_event:Function]
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# Configure CORS
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"], # Adjust this in production
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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# [DEF:log_requests:Function]
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# @PURPOSE: Middleware to log incoming HTTP requests and their response status.
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# @PRE: request is a FastAPI Request object.
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# @POST: Logs request and response details.
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# @PARAM: request (Request) - The incoming request object.
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# @PARAM: call_next (Callable) - The next middleware or route handler.
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@app.middleware("http")
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async def log_requests(request: Request, call_next):
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with belief_scope("log_requests", f"{request.method} {request.url.path}"):
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logger.info(f"[DEBUG] Incoming request: {request.method} {request.url.path}")
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response = await call_next(request)
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logger.info(f"[DEBUG] Response status: {response.status_code} for {request.url.path}")
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return response
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# [/DEF:log_requests:Function]
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# Include API routes
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app.include_router(plugins.router, prefix="/api/plugins", tags=["Plugins"])
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app.include_router(tasks.router, prefix="/api/tasks", tags=["Tasks"])
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app.include_router(settings.router, prefix="/api/settings", tags=["Settings"])
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app.include_router(connections.router, prefix="/api/settings/connections", tags=["Connections"])
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app.include_router(environments.router, prefix="/api/environments", tags=["Environments"])
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app.include_router(mappings.router)
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app.include_router(migration.router)
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app.include_router(git.router)
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app.include_router(storage.router, prefix="/api/storage", tags=["Storage"])
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# [DEF:websocket_endpoint:Function]
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# @PURPOSE: Provides a WebSocket endpoint for real-time log streaming of a task.
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# @PRE: task_id must be a valid task ID.
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# @POST: WebSocket connection is managed and logs are streamed until disconnect.
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@app.websocket("/ws/logs/{task_id}")
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async def websocket_endpoint(websocket: WebSocket, task_id: str):
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with belief_scope("websocket_endpoint", f"task_id={task_id}"):
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await websocket.accept()
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logger.info(f"WebSocket connection accepted for task {task_id}")
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task_manager = get_task_manager()
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queue = await task_manager.subscribe_logs(task_id)
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try:
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# Stream new logs
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logger.info(f"Starting log stream for task {task_id}")
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# Send initial logs first to build context
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initial_logs = task_manager.get_task_logs(task_id)
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for log_entry in initial_logs:
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log_dict = log_entry.dict()
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log_dict['timestamp'] = log_dict['timestamp'].isoformat()
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await websocket.send_json(log_dict)
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# Force a check for AWAITING_INPUT status immediately upon connection
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# This ensures that if the task is already waiting when the user connects, they get the prompt.
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task = task_manager.get_task(task_id)
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if task and task.status == "AWAITING_INPUT" and task.input_request:
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# Construct a synthetic log entry to trigger the frontend handler
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# This is a bit of a hack but avoids changing the websocket protocol significantly
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synthetic_log = {
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"timestamp": task.logs[-1].timestamp.isoformat() if task.logs else "2024-01-01T00:00:00",
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"level": "INFO",
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"message": "Task paused for user input (Connection Re-established)",
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"context": {"input_request": task.input_request}
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}
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await websocket.send_json(synthetic_log)
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while True:
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log_entry = await queue.get()
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log_dict = log_entry.dict()
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log_dict['timestamp'] = log_dict['timestamp'].isoformat()
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await websocket.send_json(log_dict)
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# If task is finished, we could potentially close the connection
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# but let's keep it open for a bit or until the client disconnects
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if "Task completed successfully" in log_entry.message or "Task failed" in log_entry.message:
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# Wait a bit to ensure client receives the last message
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await asyncio.sleep(2)
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# DO NOT BREAK here - allow client to keep connection open if they want to review logs
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# or until they disconnect. Breaking closes the socket immediately.
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# break
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except WebSocketDisconnect:
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logger.info(f"WebSocket connection disconnected for task {task_id}")
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except Exception as e:
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logger.error(f"WebSocket error for task {task_id}: {e}")
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finally:
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task_manager.unsubscribe_logs(task_id, queue)
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# [/DEF:websocket_endpoint:Function]
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# [DEF:StaticFiles:Mount]
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# @SEMANTICS: static, frontend, spa
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# @PURPOSE: Mounts the frontend build directory to serve static assets.
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frontend_path = project_root / "frontend" / "build"
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if frontend_path.exists():
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app.mount("/_app", StaticFiles(directory=str(frontend_path / "_app")), name="static")
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# Serve other static files from the root of build directory
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# [DEF:serve_spa:Function]
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# @PURPOSE: Serves frontend static files or index.html for SPA routing.
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# @PRE: file_path is requested by the client.
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# @POST: Returns the requested file or index.html as a fallback.
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@app.get("/{file_path:path}")
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async def serve_spa(file_path: str):
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with belief_scope("serve_spa", f"path={file_path}"):
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# Don't serve SPA for API routes that fell through
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if file_path.startswith("api/"):
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logger.info(f"[DEBUG] API route fell through to serve_spa: {file_path}")
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raise HTTPException(status_code=404, detail=f"API endpoint not found: {file_path}")
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full_path = frontend_path / file_path
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if full_path.is_file():
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return FileResponse(str(full_path))
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# Fallback to index.html for SPA routing
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return FileResponse(str(frontend_path / "index.html"))
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# [/DEF:serve_spa:Function]
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else:
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# [DEF:read_root:Function]
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# @PURPOSE: A simple root endpoint to confirm that the API is running when frontend is missing.
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# @PRE: None.
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# @POST: Returns a JSON message indicating API status.
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@app.get("/")
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async def read_root():
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with belief_scope("read_root"):
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return {"message": "Superset Tools API is running (Frontend build not found)"}
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# [/DEF:read_root:Function]
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# [/DEF:StaticFiles:Mount]
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# [/DEF:AppModule:Module]
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