Create app.py

app.py

@@ -0,0 +1,40 @@
+from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Request
+from fastapi.staticfiles import StaticFiles
+from fastapi.templating import Jinja2Templates
+from typing import List
+
+app = FastAPI()
+app.mount("/static", StaticFiles(directory="static"), name="static")
+
+templates = Jinja2Templates(directory="templates")
+
+class ConnectionManager:
+    def __init__(self):
+        self.active_connections: List[WebSocket] = []
+
+    async def connect(self, websocket: WebSocket):
+        await websocket.accept()
+        self.active_connections.append(websocket)
+
+    def disconnect(self, websocket: WebSocket):
+        self.active_connections.remove(websocket)
+
+    async def broadcast(self, message: str):
+        for connection in self.active_connections:
+            await connection.send_text(message)
+
+manager = ConnectionManager()
+
+@app.get('/')
+async def get(request: Request):
+    return templates.TemplateResponse('index.html', {'request': request})
+
+@app.websocket('/ws')
+async def websocket_endpoint(websocket: WebSocket):
+    await manager.connect(websocket)
+    try:
+        while True:
+            data = await websocket.receive_text()
+            await manager.broadcast(data)
+    except WebSocketDisconnect:
+        manager.disconnect(websocket)