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Create app.py
Browse files
app.py
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from fastapi import FastAPI, WebSocket
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from fastapi.responses import HTMLResponse
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import uvicorn
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app = FastAPI()
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class ConnectionManager:
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def __init__(self):
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self.active_connections = []
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async def connect(self, websocket: WebSocket):
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await websocket.accept()
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self.active_connections.append(websocket)
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async def broadcast(self, message: str):
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for connection in self.active_connections:
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await connection.send_text(message)
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manager = ConnectionManager()
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@app.get("/")
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async def get():
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return HTMLResponse("""
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<html>
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<body>
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<h1>Simple Chat</h1>
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<div id="chat" style="height:300px;overflow-y:scroll"></div>
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<input id="msg" type="text">
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<button onclick="send()">Send</button>
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<script>
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const ws = new WebSocket('ws://' + window.location.host + '/ws');
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ws.onmessage = e => {
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document.getElementById('chat').innerHTML +=
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`<div>${e.data}</div>`;
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};
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const send = () => {
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ws.send(document.getElementById('msg').value);
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document.getElementById('msg').value = '';
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};
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</script>
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</body>
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</html>
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""")
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@app.websocket("/ws")
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async def websocket_endpoint(websocket: WebSocket):
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await manager.connect(websocket)
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try:
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while True:
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message = await websocket.receive_text()
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await manager.broadcast(f"User: {message}")
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except:
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manager.active_connections.remove(websocket)
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if __name__ == "__main__":
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uvicorn.run(app, host="0.0.0.0", port=8000)
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