获取FastAPI响应的内容长度

from fastapi import FastAPI
from fastapi.responses import HTMLResponse

app = FastAPI()

@app.get("/response_length", response_class=HTMLResponse)
async def get_response_length():
    response_content = "Hello, World!"
    return response_content

response_content = "Hello, World!"
response_length = len(response_content)

from fastapi import FastAPI
from fastapi.responses import HTMLResponse

app = FastAPI()

@app.get("/response_length", response_class=HTMLResponse)
async def get_response_length():
    response_content = "Hello, World!"
    response_length = len(response_content)
    return {"response_length": response_length}