How to send binary data in multipart form data through aiohttp

[foxwhite25]

I found a image api that accept multipart form data, here is how I successfully send a request through the requests lib.

mp_encoder = MultipartEncoder(
    fields={
        'smfile': ('logo.png', open(r'C:\Users\DELL\Downloads\Video\logo.png', 'rb'), 'multipart/form-data'),
    }
)
r = requests.post(
    url,
    data=mp_encoder,
    headers={'Content-Type': mp_encoder.content_type}
)

I tried to use aiohttp.FormData() but failed, the api returns "Invalid file source"

form_data = aiohttp.FormData()
form_data.add_field(name='smfile', filename='logo.png',
                    value=open(r'C:\Users\DELL\Downloads\Video\logo.png', 'rb'),
                    content_type='multipart/form-data')
headers: Dict[str, str] = {'Content-Type': 'multipart/form-data'}

async with aiohttp.ClientSession() as session:
    async with session.post(url, data=form_data, headers=headers) as resp:
        print(await resp.text())

I am wondering if there is a equivalent for aiohttp.

[Dreamsorcerer]

Appears it should: https://docs.aiohttp.org/en/stable/client_quickstart.html#post-a-multipart-encoded-file
Maybe related to #6432.