forked from open-webui/open-webui
100 lines
2.7 KiB
Python
100 lines
2.7 KiB
Python
import logging
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from litellm.proxy.proxy_server import ProxyConfig, initialize
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from litellm.proxy.proxy_server import app
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from fastapi import FastAPI, Request, Depends, status, Response
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from fastapi.responses import JSONResponse
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from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint
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from starlette.responses import StreamingResponse
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import json
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from utils.utils import get_http_authorization_cred, get_current_user
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from config import SRC_LOG_LEVELS, ENV
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log = logging.getLogger(__name__)
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log.setLevel(SRC_LOG_LEVELS["LITELLM"])
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from config import (
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MODEL_FILTER_ENABLED,
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MODEL_FILTER_LIST,
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)
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proxy_config = ProxyConfig()
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async def config():
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router, model_list, general_settings = await proxy_config.load_config(
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router=None, config_file_path="./data/litellm/config.yaml"
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)
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await initialize(config="./data/litellm/config.yaml", telemetry=False)
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async def startup():
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await config()
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@app.on_event("startup")
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async def on_startup():
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await startup()
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app.state.MODEL_FILTER_ENABLED = MODEL_FILTER_ENABLED
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app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
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@app.middleware("http")
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async def auth_middleware(request: Request, call_next):
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auth_header = request.headers.get("Authorization", "")
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request.state.user = None
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try:
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user = get_current_user(get_http_authorization_cred(auth_header))
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log.debug(f"user: {user}")
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request.state.user = user
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except Exception as e:
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return JSONResponse(status_code=400, content={"detail": str(e)})
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response = await call_next(request)
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return response
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class ModifyModelsResponseMiddleware(BaseHTTPMiddleware):
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async def dispatch(
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self, request: Request, call_next: RequestResponseEndpoint
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) -> Response:
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response = await call_next(request)
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user = request.state.user
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if "/models" in request.url.path:
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if isinstance(response, StreamingResponse):
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# Read the content of the streaming response
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body = b""
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async for chunk in response.body_iterator:
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body += chunk
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data = json.loads(body.decode("utf-8"))
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if app.state.MODEL_FILTER_ENABLED:
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if user and user.role == "user":
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data["data"] = list(
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filter(
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lambda model: model["id"]
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in app.state.MODEL_FILTER_LIST,
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data["data"],
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)
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)
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# Modified Flag
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data["modified"] = True
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return JSONResponse(content=data)
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return response
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app.add_middleware(ModifyModelsResponseMiddleware)
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