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实现 FastAPI、Tortoise-ORM 和 WebSocket 多个客户端的功能,您需要完成以下步骤:
- pip install fastapi
- pip install uvicorn
- pip install tortoise-orm
- pip install websockets
- from tortoise.models import Model
- from tortoise import fields
-
- class User(Model):
- id = fields.UUIDField(pk=True)
- name = fields.CharField(max_length=50)
- age = fields.IntField()
- from fastapi import FastAPI, WebSocket
- from tortoise.contrib.fastapi import register_tortoise
-
- app = FastAPI()
-
- @app.websocket("/ws/{client_id}")
- async def websocket_endpoint(websocket: WebSocket, client_id: str):
- await websocket.accept()
- while True:
- try:
- data = await websocket.receive_json()
- # 在这里处理客户端发送的数据
- # 这里可以用 Tortoise-ORM 查询数据库,然后将结果返回给客户端
- except:
- break
-
- register_tortoise(
- app,
- db_url="sqlite://db.sqlite3",
- modules={"models": ["app.models"]},
- generate_schemas=True,
- )
-
- if __name__ == "__main__":
- import uvicorn
- uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
ws://localhost:8000/ws/client-1
,然后发送 JSON 数据,就可以将数据发送给服务器并接收来自服务器的响应。添加多个客户端支持 您可以为每个客户端创建一个新的 WebSocket 连接,并使用不同的客户端 ID 标识它们。然后,在服务器端,您可以使用客户端 ID 区分不同的客户端并将数据发送回正确的客户端。
下面是一个具体实现的示例代码:
- from fastapi import FastAPI, WebSocket
- from typing import Dict
- from tortoise.contrib.fastapi import register_tortoise
- from tortoise.transactions import in_transaction
- import uuid
-
- app = FastAPI()
- clients: Dict[str, WebSocket] = {}
-
- @app.websocket("/ws/{client_id}")
- async def websocket_endpoint(websocket: WebSocket, client_id: str):
- await websocket.accept()
- clients[client_id] = websocket
- try:
- while True:
- data = await websocket.receive_json()
- await send_message_to_all_clients(data)
- except Exception as e:
- print(f"WebSocket error: {e}")
- finally:
- del clients[client_id]
-
- async def send_message_to_all_clients(data: dict):
- async with in_transaction():
- client_id = data["client_id"]
- message = data["message"]
- await save_message_to_database(client_id, message)
- for client, ws in clients.items():
- if client != client_id:
- await ws.send_json({"client_id": client_id, "message": message})
-
- async def save_message_to_database(client_id: str, message: str):
- # save the message to database using Tortoise-ORM
- ...
-
- register_tortoise(
- app,
- db_url="sqlite://db.sqlite3",
- modules={"models": ["app.models"]},
- generate_schemas=True,
- )
-
- if __name__ == "__main__":
- import uvicorn
- uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
在这个示例中,我们添加了 clients
字典来存储所有连接的客户端,并使用客户端 ID 作为字典的键。在客户端连接时,我们将客户端添加到 clients
字典中。在客户端断开连接时,我们将客户端从 clients
字典中删除。每次收到一个客户端的消息时,我们将消息发送给所有连接的客户端,除了当前客户端。我们还使用 Tortoise-ORM
将消息保存到数据库中。
注意,这是一个简单的示例实现,您可以根据实际需求进行修改和完善。
下面是一个简单的封装示例:
- from typing import Dict
- from fastapi import FastAPI, WebSocket
- from tortoise.contrib.fastapi import register_tortoise
- from tortoise.transactions import in_transaction
-
- app = FastAPI()
-
- class WebSocketManager:
- def __init__(self):
- self.clients: Dict[str, WebSocket] = {}
-
- async def connect(self, websocket: WebSocket, client_id: str):
- await websocket.accept()
- self.clients[client_id] = websocket
-
- async def disconnect(self, client_id: str):
- del self.clients[client_id]
-
- async def send_message_to_all(self, data: dict):
- async with in_transaction():
- client_id = data["client_id"]
- message = data["message"]
- await self.save_message_to_database(client_id, message)
- for client, ws in self.clients.items():
- if client != client_id:
- await ws.send_json({"client_id": client_id, "message": message})
-
- async def save_message_to_database(self, client_id: str, message: str):
- # save the message to database using Tortoise-ORM
- ...
-
- manager = WebSocketManager()
-
- @app.websocket("/ws/{client_id}")
- async def websocket_endpoint(websocket: WebSocket, client_id: str):
- await manager.connect(websocket, client_id)
- try:
- while True:
- data = await websocket.receive_json()
- await manager.send_message_to_all(data)
- except Exception as e:
- print(f"WebSocket error: {e}")
- finally:
- await manager.disconnect(client_id)
-
- register_tortoise(
- app,
- db_url="sqlite://db.sqlite3",
- modules={"models": ["app.models"]},
- generate_schemas=True,
- )
-
- if __name__ == "__main__":
- import uvicorn
- uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
在这个示例中,我们创建了一个 WebSocketManager
类来封装 WebSocket 的管理逻辑。在 WebSocketManager
类中,我们将 clients
字典和一些 WebSocket 相关的方法封装在一起。在 websocket_endpoint
函数中,我们只需要调用 WebSocketManager
的相应方法就可以处理 WebSocket 连接和消息发送的逻辑。
这个示例是一个简单的封装示例,请根据实际需求进行修改和完善。
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