""" FastAPI backend with WebSocket support for real-time video processing """ from fastapi import FastAPI, WebSocket, WebSocketDisconnect, UploadFile, File, HTTPException, BackgroundTasks from fastapi.responses import FileResponse, StreamingResponse from fastapi.middleware.cors import CORSMiddleware from fastapi.staticfiles import StaticFiles import uvicorn import os import uuid import json import asyncio from pathlib import Path from typing import Dict, Optional import tempfile import shutil from async_processor import async_processor app = FastAPI(title="VR180 Converter API", version="2.0.0") # CORS middleware app.add_middleware( CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"], ) # Create necessary directories os.makedirs("uploads", exist_ok=True) os.makedirs("outputs", exist_ok=True) os.makedirs("thumbnails", exist_ok=True) os.makedirs("static", exist_ok=True) # Mount static files app.mount("/static", StaticFiles(directory="static"), name="static") @app.get("/") async def root(): """Health check endpoint""" return {"message": "VR180 Converter API is running", "version": "2.0.0"} @app.get("/api/health") async def health_check(): """Detailed health check""" return { "status": "healthy", "message": "VR180 Converter API is running", "version": "2.0.0", "active_jobs": len(async_processor.processing_jobs), "active_connections": len(async_processor.active_connections) } @app.post("/api/upload") async def upload_video(file: UploadFile = File(...)): """Upload video file and return metadata""" try: # Validate file type allowed_extensions = {'.mp4', '.avi', '.mov', '.mkv', '.webm'} file_extension = Path(file.filename).suffix.lower() if file_extension not in allowed_extensions: raise HTTPException(status_code=400, detail="Invalid file type") # Generate unique filename file_id = str(uuid.uuid4()) filename = f"{file_id}_{file.filename}" filepath = os.path.join("uploads", filename) # Save file with open(filepath, "wb") as buffer: shutil.copyfileobj(file.file, buffer) # Get video info video_info = async_processor.get_video_info(filepath) # Generate thumbnail thumbnail_path = async_processor.generate_thumbnail(filepath) return { "success": True, "file_id": file_id, "filename": filename, "original_name": file.filename, "video_info": video_info, "thumbnail": thumbnail_path, "file_size": os.path.getsize(filepath) } except Exception as e: raise HTTPException(status_code=500, detail=str(e)) @app.post("/api/process/{file_id}") async def start_processing(file_id: str, background_tasks: BackgroundTasks): """Start video processing job""" try: # Find the uploaded file upload_dir = Path("uploads") files = list(upload_dir.glob(f"{file_id}_*")) if not files: raise HTTPException(status_code=404, detail="File not found") input_path = str(files[0]) # Generate output path output_filename = f"vr180_{Path(input_path).name}" output_path = os.path.join("outputs", output_filename) # Start processing in background job_id = str(uuid.uuid4()) background_tasks.add_task( async_processor.process_video_async, input_path, output_path, job_id ) return { "success": True, "job_id": job_id, "message": "Processing started", "websocket_url": f"/ws/{job_id}" } except Exception as e: raise HTTPException(status_code=500, detail=str(e)) @app.websocket("/ws/{job_id}") async def websocket_endpoint(websocket: WebSocket, job_id: str): """WebSocket endpoint for real-time updates""" await async_processor.connect(websocket, job_id) try: while True: # Keep connection alive data = await websocket.receive_text() message = json.loads(data) if message.get("type") == "ping": await websocket.send_text(json.dumps({"type": "pong"})) except WebSocketDisconnect: async_processor.disconnect(job_id) @app.get("/api/status/{job_id}") async def get_job_status(job_id: str): """Get processing job status""" status = async_processor.get_job_status(job_id) if not status: raise HTTPException(status_code=404, detail="Job not found") return status @app.get("/api/download/{filename}") async def download_video(filename: str): """Download processed video""" filepath = os.path.join("outputs", filename) if not os.path.exists(filepath): raise HTTPException(status_code=404, detail="File not found") return FileResponse( filepath, media_type="video/mp4", filename=filename, headers={"Content-Disposition": f"attachment; filename={filename}"} ) @app.get("/api/thumbnail/{filename}") async def get_thumbnail(filename: str): """Get video thumbnail""" thumb_path = os.path.join("thumbnails", filename) if not os.path.exists(thumb_path): raise HTTPException(status_code=404, detail="Thumbnail not found") return FileResponse(thumb_path, media_type="image/jpeg") @app.delete("/api/cleanup/{file_id}") async def cleanup_files(file_id: str): """Clean up uploaded and processed files""" try: # Remove uploaded file upload_dir = Path("uploads") upload_files = list(upload_dir.glob(f"{file_id}_*")) for file in upload_files: file.unlink() # Remove output file output_dir = Path("outputs") output_files = list(output_dir.glob(f"vr180_{file_id}_*")) for file in output_files: file.unlink() # Remove thumbnail thumb_dir = Path("thumbnails") thumb_files = list(thumb_dir.glob(f"{file_id}_*")) for file in thumb_files: file.unlink() return {"success": True, "message": "Files cleaned up"} except Exception as e: raise HTTPException(status_code=500, detail=str(e)) @app.get("/api/jobs") async def list_jobs(): """List all processing jobs""" return { "jobs": async_processor.processing_jobs, "active_connections": len(async_processor.active_connections) } if __name__ == "__main__": uvicorn.run( "fastapi_app:app", host="0.0.0.0", port=8000, reload=True, workers=1 # Single worker for shared state )