open-webui/backend/apps/ollama/main.py

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from fastapi import FastAPI, Request, Response, HTTPException, Depends, status
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from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import StreamingResponse
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from fastapi.concurrency import run_in_threadpool
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import requests
import json
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import uuid
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from pydantic import BaseModel
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from apps.web.models.users import Users
from constants import ERROR_MESSAGES
from utils.utils import decode_token, get_current_user, get_admin_user
from config import OLLAMA_API_BASE_URL, WEBUI_AUTH
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app = FastAPI()
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
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app.state.OLLAMA_API_BASE_URL = OLLAMA_API_BASE_URL
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# TARGET_SERVER_URL = OLLAMA_API_BASE_URL
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REQUEST_POOL = []
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@app.get("/url")
async def get_ollama_api_url(user=Depends(get_admin_user)):
return {"OLLAMA_API_BASE_URL": app.state.OLLAMA_API_BASE_URL}
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class UrlUpdateForm(BaseModel):
url: str
@app.post("/url/update")
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async def update_ollama_api_url(form_data: UrlUpdateForm, user=Depends(get_admin_user)):
app.state.OLLAMA_API_BASE_URL = form_data.url
return {"OLLAMA_API_BASE_URL": app.state.OLLAMA_API_BASE_URL}
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@app.get("/cancel/{request_id}")
async def cancel_ollama_request(request_id: str, user=Depends(get_current_user)):
if user:
if request_id in REQUEST_POOL:
REQUEST_POOL.remove(request_id)
return True
else:
raise HTTPException(status_code=401, detail=ERROR_MESSAGES.ACCESS_PROHIBITED)
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@app.api_route("/{path:path}", methods=["GET", "POST", "PUT", "DELETE"])
async def proxy(path: str, request: Request, user=Depends(get_current_user)):
target_url = f"{app.state.OLLAMA_API_BASE_URL}/{path}"
body = await request.body()
headers = dict(request.headers)
if user.role in ["user", "admin"]:
if path in ["pull", "delete", "push", "copy", "create"]:
if user.role != "admin":
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
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)
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else:
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raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
)
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headers.pop("host", None)
headers.pop("authorization", None)
headers.pop("origin", None)
headers.pop("referer", None)
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r = None
def get_request():
nonlocal r
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request_id = str(uuid.uuid4())
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try:
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REQUEST_POOL.append(request_id)
def stream_content():
try:
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if path == "generate":
data = json.loads(body.decode("utf-8"))
if not ("stream" in data and data["stream"] == False):
yield json.dumps({"id": request_id, "done": False}) + "\n"
elif path == "chat":
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yield json.dumps({"id": request_id, "done": False}) + "\n"
for chunk in r.iter_content(chunk_size=8192):
if request_id in REQUEST_POOL:
yield chunk
else:
print("User: canceled request")
break
finally:
if hasattr(r, "close"):
r.close()
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if request_id in REQUEST_POOL:
REQUEST_POOL.remove(request_id)
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r = requests.request(
method=request.method,
url=target_url,
data=body,
headers=headers,
stream=True,
)
r.raise_for_status()
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# r.close()
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return StreamingResponse(
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stream_content(),
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status_code=r.status_code,
headers=dict(r.headers),
)
except Exception as e:
raise e
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try:
return await run_in_threadpool(get_request)
except Exception as e:
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error_detail = "Open WebUI: Server Connection Error"
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if r is not None:
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try:
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res = r.json()
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if "error" in res:
error_detail = f"Ollama: {res['error']}"
except:
error_detail = f"Ollama: {e}"
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raise HTTPException(
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status_code=r.status_code if r else 500,
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detail=error_detail,
)