Streaming upload

Is it possible on an aiohttp server to send an uploaded file to another server without loading it into memory? How can I do that?

async def forward_huge_upload_to_upstream(request):
    reader = await request.multipart()
    field = await
    filename = field.filename

    data = FormData()
    data.add_field('data', ???, filename=field.filename, content_type=field.headers['Conent-Type'])

    async with aiohttp.ClientSession() as session:
        async with, data=data) as response:
            return web.Response(status=response.status, body=await response.text())