#StreamResponse

# 异步迭代
async for chunk in resp:
    f.write(chunk)

# 同步迭代
for chunk in resp:
    f.write(chunk)

# 推荐：上下文管理器
async with resp:
    ...

# 手动关闭
await resp.aclose()  # 异步
resp.close()         # 同步