forked from open-webui/open-webui
143 lines
4.1 KiB
Python
143 lines
4.1 KiB
Python
from fastapi import FastAPI, Request, Response, HTTPException, Depends, status
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import StreamingResponse
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from fastapi.concurrency import run_in_threadpool
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import requests
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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
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from constants import ERROR_MESSAGES
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from utils.utils import decode_token, get_current_user, get_admin_user
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from config import OLLAMA_API_BASE_URL, WEBUI_AUTH
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app = FastAPI()
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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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")
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async def get_ollama_api_url(user=Depends(get_admin_user)):
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return {"OLLAMA_API_BASE_URL": app.state.OLLAMA_API_BASE_URL}
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class UrlUpdateForm(BaseModel):
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url: str
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@app.post("/url/update")
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async def update_ollama_api_url(form_data: UrlUpdateForm, user=Depends(get_admin_user)):
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app.state.OLLAMA_API_BASE_URL = form_data.url
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return {"OLLAMA_API_BASE_URL": app.state.OLLAMA_API_BASE_URL}
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@app.get("/cancel/{request_id}")
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async def cancel_ollama_request(request_id: str, user=Depends(get_current_user)):
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if user:
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if request_id in REQUEST_POOL:
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REQUEST_POOL.remove(request_id)
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return True
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else:
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raise HTTPException(status_code=401, detail=ERROR_MESSAGES.ACCESS_PROHIBITED)
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@app.api_route("/{path:path}", methods=["GET", "POST", "PUT", "DELETE"])
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async def proxy(path: str, request: Request, user=Depends(get_current_user)):
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target_url = f"{app.state.OLLAMA_API_BASE_URL}/{path}"
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body = await request.body()
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headers = dict(request.headers)
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if user.role in ["user", "admin"]:
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if path in ["pull", "delete", "push", "copy", "create"]:
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if user.role != "admin":
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
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)
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else:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
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)
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headers.pop("host", None)
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headers.pop("authorization", None)
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headers.pop("origin", None)
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headers.pop("referer", None)
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r = None
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def get_request():
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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)
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def stream_content():
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try:
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if path in ["chat"]:
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yield json.dumps({"id": request_id, "done": False}) + "\n"
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for chunk in r.iter_content(chunk_size=8192):
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if request_id in REQUEST_POOL:
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yield chunk
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else:
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print("User: canceled request")
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break
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finally:
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if hasattr(r, "close"):
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r.close()
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REQUEST_POOL.remove(request_id)
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r = requests.request(
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method=request.method,
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url=target_url,
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data=body,
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headers=headers,
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stream=True,
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)
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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,
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headers=dict(r.headers),
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)
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except Exception as e:
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raise e
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try:
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return await run_in_threadpool(get_request)
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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:
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error_detail = f"Ollama: {res['error']}"
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except:
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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,
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)
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