[Python] Why is connecting to a websocket in python returning a rejected websocket connection?

So im trying to connect to the TikTok websocket for chat messages. In the socket request made from the incognito browser, it connects and returns data in protobuf which represent the chat messages. When i connect in python to the websocket, it returns with websocket rejected. I dont think its anything to do with authentication cookies, because the incognito browser doesnt have any and the stream chat works. Does anyone know why? Would appreciate the help here! THanks

import asyncio import websockets import datetime

async def connect(cookies):
uri = "wss://webcast16-ws-useast2a.tiktok.com/webcast/im/ws_proxy/ws_reuse_supplement/?version_code=180800&device_platform=web&cookie_enabled=true&screen_width=1920&screen_height=1080&browser_language=en-US&browser_platform=Win32&browser_name=Mozilla&browser_version=5.0%20(Windows%20NT%2010.0;%20Win64;%20x64)%20AppleWebKit/537.36%20(KHTML,%20like%20Gecko)%20Chrome/136.0.0.0%20Safari/537.36%20Edg/136.0.0.0&browser_online=true&tz_name=Europe/London&app_name=tiktok_web&sup_ws_ds_opt=1&version_code=270000&update_version_code=2.0.0&compress=gzip&wrss=FQ6xeFgNFFOnt8GqF66yzNwx7NC_rWgR7vC6moobbjM&host=https://webcast.tiktok.com&aid=1988&live_id=12&debug=false&app_language=en&client_enter=1&room_id=7509146835937561366&identity=audience&history_comment_count=6&heartbeat_duration=0&last_rtt=281.400146484375&internal_ext=fetch_time:1748361800370|start_time:0|ack_ids:,,|flag:0|seq:1|next_cursor:1748361800370_7509156752575699652_1_1_7509156597956878851_0|wss_info:0-1748361800370-0-0&cursor=1748361800370_7509156752575699652_1_1_7509156597956878851_0&resp_content_type=protobuf&did_rule=3&webcast_language=en"
headers = {
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
# "cache-control": "no-cache",
# "connection": "Upgrade",
# "host": "im-ws.tiktok.com",
"origin": "https://www.tiktok.com",
# "pragma": "no-cache",
# "sec-websocket-extensions": "permessage-deflate; client_max_window_bits",
# "sec-websocket-key": "17q0Mjaeh07M/jOeU32fuA==",
# "sec-websocket-version": "13",
# "upgrade": "websocket",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Edg/136.0.0.0",
"cookie": cookies
}

try:
async with websockets.connect(uri) as websocket:
async with websockets.connect(uri, additional_headers=headers) as websocket:
response = await websocket.recv()
print(response)
# async for response in websocket:
# print(response)
except websockets.exceptions.ConnectionClosedError as e:
print(f"Connection closed unexpectedly: {e}")
except Exception as e:
print(f"Other error: {e}")

def json_list_to_concatenated_string(json_list):
return ' '.join(
f"{item['name']}={item['value']}" + (';' if i < len(json_list) - 1 else '')
for i, item in enumerate(json_list)
)

result = json_list_to_concatenated_string(cookies)
asyncio.run(connect(result))


Server rejected websocket connection error

Socket request from incognito browser

Cookies present on incognito browser

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