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import asyncio
import json
import logging
import random
import urllib.parse
import urllib.request
from typing import Optional
import websocket # NOTE: websocket-client (https://github.com/websocket-client/websocket-client)
from open_webui.env import SRC_LOG_LEVELS
from pydantic import BaseModel
log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["COMFYUI"])
default_headers = {"User-Agent": "Mozilla/5.0"}
def queue_prompt(prompt, client_id, base_url):
log.info("queue_prompt")
p = {"prompt": prompt, "client_id": client_id}
data = json.dumps(p).encode("utf-8")
log.debug(f"queue_prompt data: {data}")
try:
req = urllib.request.Request(
f"{base_url}/prompt", data=data, headers=default_headers
)
response = urllib.request.urlopen(req).read()
return json.loads(response)
except Exception as e:
log.exception(f"Error while queuing prompt: {e}")
raise e
def get_image(filename, subfolder, folder_type, base_url):
log.info("get_image")
data = {"filename": filename, "subfolder": subfolder, "type": folder_type}
url_values = urllib.parse.urlencode(data)
req = urllib.request.Request(
f"{base_url}/view?{url_values}", headers=default_headers
)
with urllib.request.urlopen(req) as response:
return response.read()
def get_image_url(filename, subfolder, folder_type, base_url):
log.info("get_image")
data = {"filename": filename, "subfolder": subfolder, "type": folder_type}
url_values = urllib.parse.urlencode(data)
return f"{base_url}/view?{url_values}"
def get_history(prompt_id, base_url):
log.info("get_history")
req = urllib.request.Request(
f"{base_url}/history/{prompt_id}", headers=default_headers
)
with urllib.request.urlopen(req) as response:
return json.loads(response.read())
def get_images(ws, prompt, client_id, base_url):
prompt_id = queue_prompt(prompt, client_id, base_url)["prompt_id"]
output_images = []
while True:
out = ws.recv()
if isinstance(out, str):
message = json.loads(out)
if message["type"] == "executing":
data = message["data"]
if data["node"] is None and data["prompt_id"] == prompt_id:
break # Execution is done
else:
continue # previews are binary data
history = get_history(prompt_id, base_url)[prompt_id]
for o in history["outputs"]:
for node_id in history["outputs"]:
node_output = history["outputs"][node_id]
if "images" in node_output:
for image in node_output["images"]:
url = get_image_url(
image["filename"], image["subfolder"], image["type"], base_url
)
output_images.append({"url": url})
return {"data": output_images}
class ComfyUINodeInput(BaseModel):
type: Optional[str] = None
node_ids: list[str] = []
key: Optional[str] = "text"
value: Optional[str] = None
class ComfyUIWorkflow(BaseModel):
workflow: str
nodes: list[ComfyUINodeInput]
class ComfyUIGenerateImageForm(BaseModel):
workflow: ComfyUIWorkflow
prompt: str
negative_prompt: Optional[str] = None
width: int
height: int
n: int = 1
steps: Optional[int] = None
seed: Optional[int] = None
async def comfyui_generate_image(
model: str, payload: ComfyUIGenerateImageForm, client_id, base_url
):
ws_url = base_url.replace("http://", "ws://").replace("https://", "wss://")
workflow = json.loads(payload.workflow.workflow)
for node in payload.workflow.nodes:
if node.type:
if node.type == "model":
for node_id in node.node_ids:
workflow[node_id]["inputs"][node.key] = model
elif node.type == "prompt":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["text"] = payload.prompt
elif node.type == "negative_prompt":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["text"] = payload.negative_prompt
elif node.type == "width":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["width"] = payload.width
elif node.type == "height":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["height"] = payload.height
elif node.type == "n":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["batch_size"] = payload.n
elif node.type == "steps":
for node_id in node.node_ids:
workflow[node_id]["inputs"]["steps"] = payload.steps
elif node.type == "seed":
seed = (
payload.seed
if payload.seed
else random.randint(0, 18446744073709551614)
)
for node_id in node.node_ids:
workflow[node_id]["inputs"][node.key] = seed
else:
for node_id in node.node_ids:
workflow[node_id]["inputs"][node.key] = node.value
try:
ws = websocket.WebSocket()
ws.connect(f"{ws_url}/ws?clientId={client_id}")
log.info("WebSocket connection established.")
except Exception as e:
log.exception(f"Failed to connect to WebSocket server: {e}")
return None
try:
log.info("Sending workflow to WebSocket server.")
log.info(f"Workflow: {workflow}")
images = await asyncio.to_thread(get_images, ws, workflow, client_id, base_url)
except Exception as e:
log.exception(f"Error while receiving images: {e}")
images = None
ws.close()
return images
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