How to access comfyui by API?

[ultimatech-cn]

I deployed a comfyui server, but could access it by API, I am using the script example of comfyui, but got error reported.

#This is an example that uses the websockets api to know when a prompt execution is done
#Once the prompt execution is done it downloads the images using the /history endpoint

import websocket #NOTE: websocket-client (https://github.com/websocket-client/websocket-client)
import uuid
import json
import urllib.request
import urllib.parse

server_address = "xxxx.modal.run"
client_id = str(uuid.uuid4())

def queue_prompt(prompt):
    p = {"prompt": prompt, "client_id": client_id}
    data = json.dumps(p).encode('utf-8')
    req =  urllib.request.Request("http://{}/prompt".format(server_address), data=data)
    return json.loads(urllib.request.urlopen(req).read())

error as following

Traceback (most recent call last):
File "xxx\websockets_api_example.py", line 154, in
ws.connect("ws://{}/ws?clientId={}".format(server_address, client_id))
File "xxx\venv\lib\site-packages\websocket_core.py", line 266, in connect
self.sock, addrs = connect(
File "xxx\venv\lib\site-packages\websocket_http.py", line 128, in connect
hostname, port_from_url, resource, is_secure = parse_url(url)
File "xxx\venv\lib\site-packages\websocket_url.py", line 62, in parse_url
raise ValueError("scheme %s is invalid" % scheme)
ValueError: scheme https is invalid

[erikbern]

This seems like an issue unrelated to Modal – you're trying to open a websocket connection to a https:// endpoint - it should be ws://

[ultimatech-cn]

I have tried ws://， and other method. It failed