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main.py 39.8 KB
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from fastapi import (
    FastAPI,
    Request,
    Response,
    HTTPException,
    Depends,
    status,
    UploadFile,
    File,
    BackgroundTasks,
)
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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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from pydantic import BaseModel, ConfigDict
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import os
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import re
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import copy
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import random
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import requests
import json
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import uuid
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import aiohttp
import asyncio
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import logging
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import time
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from urllib.parse import urlparse
from typing import Optional, List, Union

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from apps.web.models.users import Users
from constants import ERROR_MESSAGES
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from utils.utils import (
    decode_token,
    get_current_user,
    get_verified_user,
    get_admin_user,
)
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from config import (
    SRC_LOG_LEVELS,
    OLLAMA_BASE_URLS,
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    ENABLE_MODEL_FILTER,
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    MODEL_FILTER_LIST,
    UPLOAD_DIR,
)
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from utils.misc import calculate_sha256
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log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["OLLAMA"])
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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.ENABLE_MODEL_FILTER = ENABLE_MODEL_FILTER
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app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
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app.state.OLLAMA_BASE_URLS = OLLAMA_BASE_URLS
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app.state.MODELS = {}
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REQUEST_POOL = []


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# TODO: Implement a more intelligent load balancing mechanism for distributing requests among multiple backend instances.
# Current implementation uses a simple round-robin approach (random.choice). Consider incorporating algorithms like weighted round-robin,
# least connections, or least response time for better resource utilization and performance optimization.


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@app.middleware("http")
async def check_url(request: Request, call_next):
    if len(app.state.MODELS) == 0:
        await get_all_models()
    else:
        pass

    response = await call_next(request)
    return response


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@app.head("/")
@app.get("/")
async def get_status():
    return {"status": True}


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@app.get("/urls")
async def get_ollama_api_urls(user=Depends(get_admin_user)):
    return {"OLLAMA_BASE_URLS": app.state.OLLAMA_BASE_URLS}
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class UrlUpdateForm(BaseModel):
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    urls: List[str]
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@app.post("/urls/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_BASE_URLS = form_data.urls

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    log.info(f"app.state.OLLAMA_BASE_URLS: {app.state.OLLAMA_BASE_URLS}")
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    return {"OLLAMA_BASE_URLS": app.state.OLLAMA_BASE_URLS}
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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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async def fetch_url(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.json()
    except Exception as e:
        # Handle connection error here
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        log.error(f"Connection error: {e}")
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        return None


def merge_models_lists(model_lists):
    merged_models = {}

    for idx, model_list in enumerate(model_lists):
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        if model_list is not None:
            for model in model_list:
                digest = model["digest"]
                if digest not in merged_models:
                    model["urls"] = [idx]
                    merged_models[digest] = model
                else:
                    merged_models[digest]["urls"].append(idx)
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    return list(merged_models.values())


# user=Depends(get_current_user)


async def get_all_models():
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    log.info("get_all_models()")
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    tasks = [fetch_url(f"{url}/api/tags") for url in app.state.OLLAMA_BASE_URLS]
    responses = await asyncio.gather(*tasks)

    models = {
        "models": merge_models_lists(
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            map(lambda response: response["models"] if response else None, responses)
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        )
    }
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    app.state.MODELS = {model["model"]: model for model in models["models"]}

    return models


@app.get("/api/tags")
@app.get("/api/tags/{url_idx}")
async def get_ollama_tags(
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    url_idx: Optional[int] = None, user=Depends(get_verified_user)
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):
    if url_idx == None:
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        models = await get_all_models()
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        if app.state.ENABLE_MODEL_FILTER:
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            if user.role == "user":
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                models["models"] = list(
                    filter(
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                        lambda model: model["name"] in app.state.MODEL_FILTER_LIST,
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                        models["models"],
                    )
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                )
                return models
        return models
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    else:
        url = app.state.OLLAMA_BASE_URLS[url_idx]
        try:
            r = requests.request(method="GET", url=f"{url}/api/tags")
            r.raise_for_status()

            return r.json()
        except Exception as e:
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            log.exception(e)
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            error_detail = "Open WebUI: Server Connection Error"
            if r is not None:
                try:
                    res = r.json()
                    if "error" in res:
                        error_detail = f"Ollama: {res['error']}"
                except:
                    error_detail = f"Ollama: {e}"

            raise HTTPException(
                status_code=r.status_code if r else 500,
                detail=error_detail,
            )


@app.get("/api/version")
@app.get("/api/version/{url_idx}")
async def get_ollama_versions(url_idx: Optional[int] = None):

    if url_idx == None:

        # returns lowest version
        tasks = [fetch_url(f"{url}/api/version") for url in app.state.OLLAMA_BASE_URLS]
        responses = await asyncio.gather(*tasks)
        responses = list(filter(lambda x: x is not None, responses))

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        if len(responses) > 0:
            lowest_version = min(
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                responses,
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                key=lambda x: tuple(
                    map(int, re.sub(r"^v|-.*", "", x["version"]).split("."))
                ),
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            )
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            return {"version": lowest_version["version"]}
        else:
            raise HTTPException(
                status_code=500,
                detail=ERROR_MESSAGES.OLLAMA_NOT_FOUND,
            )
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    else:
        url = app.state.OLLAMA_BASE_URLS[url_idx]
        try:
            r = requests.request(method="GET", url=f"{url}/api/version")
            r.raise_for_status()

            return r.json()
        except Exception as e:
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            log.exception(e)
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            error_detail = "Open WebUI: Server Connection Error"
            if r is not None:
                try:
                    res = r.json()
                    if "error" in res:
                        error_detail = f"Ollama: {res['error']}"
                except:
                    error_detail = f"Ollama: {e}"

            raise HTTPException(
                status_code=r.status_code if r else 500,
                detail=error_detail,
            )


class ModelNameForm(BaseModel):
    name: str


@app.post("/api/pull")
@app.post("/api/pull/{url_idx}")
async def pull_model(
    form_data: ModelNameForm, url_idx: int = 0, user=Depends(get_admin_user)
):
    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    r = None

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    def get_request():
        nonlocal url
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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:
                    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:
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                            log.warning("User: canceled request")
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                            break
                finally:
                    if hasattr(r, "close"):
                        r.close()
                        if request_id in REQUEST_POOL:
                            REQUEST_POOL.remove(request_id)
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            r = requests.request(
                method="POST",
                url=f"{url}/api/pull",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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                stream=True,
            )

            r.raise_for_status()

            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
            raise e

    try:
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        return await run_in_threadpool(get_request)
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    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


class PushModelForm(BaseModel):
    name: str
    insecure: Optional[bool] = None
    stream: Optional[bool] = None


@app.delete("/api/push")
@app.delete("/api/push/{url_idx}")
async def push_model(
    form_data: PushModelForm,
    url_idx: Optional[int] = None,
    user=Depends(get_admin_user),
):
    if url_idx == None:
        if form_data.name in app.state.MODELS:
            url_idx = app.state.MODELS[form_data.name]["urls"][0]
        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.name),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.debug(f"url: {url}")
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    r = None

    def get_request():
        nonlocal url
        nonlocal r
        try:

            def stream_content():
                for chunk in r.iter_content(chunk_size=8192):
                    yield chunk

            r = requests.request(
                method="POST",
                url=f"{url}/api/push",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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            )

            r.raise_for_status()

            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
            raise e

    try:
        return await run_in_threadpool(get_request)
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


class CreateModelForm(BaseModel):
    name: str
    modelfile: Optional[str] = None
    stream: Optional[bool] = None
    path: Optional[str] = None


@app.post("/api/create")
@app.post("/api/create/{url_idx}")
async def create_model(
    form_data: CreateModelForm, url_idx: int = 0, user=Depends(get_admin_user)
):
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    log.debug(f"form_data: {form_data}")
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    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    r = None

    def get_request():
        nonlocal url
        nonlocal r
        try:

            def stream_content():
                for chunk in r.iter_content(chunk_size=8192):
                    yield chunk

            r = requests.request(
                method="POST",
                url=f"{url}/api/create",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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                stream=True,
            )

            r.raise_for_status()

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            log.debug(f"r: {r}")
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            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
            raise e

    try:
        return await run_in_threadpool(get_request)
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


class CopyModelForm(BaseModel):
    source: str
    destination: str


@app.post("/api/copy")
@app.post("/api/copy/{url_idx}")
async def copy_model(
    form_data: CopyModelForm,
    url_idx: Optional[int] = None,
    user=Depends(get_admin_user),
):
    if url_idx == None:
        if form_data.source in app.state.MODELS:
            url_idx = app.state.MODELS[form_data.source]["urls"][0]
        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.source),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    try:
        r = requests.request(
            method="POST",
            url=f"{url}/api/copy",
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            data=form_data.model_dump_json(exclude_none=True).encode(),
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        )
        r.raise_for_status()

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        log.debug(f"r.text: {r.text}")
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        return True
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


@app.delete("/api/delete")
@app.delete("/api/delete/{url_idx}")
async def delete_model(
    form_data: ModelNameForm,
    url_idx: Optional[int] = None,
    user=Depends(get_admin_user),
):
    if url_idx == None:
        if form_data.name in app.state.MODELS:
            url_idx = app.state.MODELS[form_data.name]["urls"][0]
        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.name),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    try:
        r = requests.request(
            method="DELETE",
            url=f"{url}/api/delete",
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            data=form_data.model_dump_json(exclude_none=True).encode(),
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        )
        r.raise_for_status()

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        log.debug(f"r.text: {r.text}")
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        return True
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


@app.post("/api/show")
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async def show_model_info(form_data: ModelNameForm, user=Depends(get_verified_user)):
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    if form_data.name not in app.state.MODELS:
        raise HTTPException(
            status_code=400,
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            detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.name),
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        )

    url_idx = random.choice(app.state.MODELS[form_data.name]["urls"])
    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    try:
        r = requests.request(
            method="POST",
            url=f"{url}/api/show",
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            data=form_data.model_dump_json(exclude_none=True).encode(),
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        )
        r.raise_for_status()

        return r.json()
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


class GenerateEmbeddingsForm(BaseModel):
    model: str
    prompt: str
    options: Optional[dict] = None
    keep_alive: Optional[Union[int, str]] = None


@app.post("/api/embeddings")
@app.post("/api/embeddings/{url_idx}")
async def generate_embeddings(
    form_data: GenerateEmbeddingsForm,
    url_idx: Optional[int] = None,
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    user=Depends(get_verified_user),
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):
    if url_idx == None:
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        model = form_data.model

        if ":" not in model:
            model = f"{model}:latest"

        if model in app.state.MODELS:
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            url_idx = random.choice(app.state.MODELS[model]["urls"])
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        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.model),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    try:
        r = requests.request(
            method="POST",
            url=f"{url}/api/embeddings",
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            data=form_data.model_dump_json(exclude_none=True).encode(),
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        )
        r.raise_for_status()

        return r.json()
    except Exception as e:
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        log.exception(e)
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        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


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def generate_ollama_embeddings(
    form_data: GenerateEmbeddingsForm,
    url_idx: Optional[int] = None,
):
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    log.info(f"generate_ollama_embeddings {form_data}")
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    if url_idx == None:
        model = form_data.model

        if ":" not in model:
            model = f"{model}:latest"

        if model in app.state.MODELS:
            url_idx = random.choice(app.state.MODELS[model]["urls"])
        else:
            raise HTTPException(
                status_code=400,
                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.model),
            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
    log.info(f"url: {url}")

    try:
        r = requests.request(
            method="POST",
            url=f"{url}/api/embeddings",
            data=form_data.model_dump_json(exclude_none=True).encode(),
        )
        r.raise_for_status()

        data = r.json()

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        log.info(f"generate_ollama_embeddings {data}")
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        if "embedding" in data:
            return data["embedding"]
        else:
            raise "Something went wrong :/"
    except Exception as e:
        log.exception(e)
        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise error_detail


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class GenerateCompletionForm(BaseModel):
    model: str
    prompt: str
    images: Optional[List[str]] = None
    format: Optional[str] = None
    options: Optional[dict] = None
    system: Optional[str] = None
    template: Optional[str] = None
    context: Optional[str] = None
    stream: Optional[bool] = True
    raw: Optional[bool] = None
    keep_alive: Optional[Union[int, str]] = None


@app.post("/api/generate")
@app.post("/api/generate/{url_idx}")
async def generate_completion(
    form_data: GenerateCompletionForm,
    url_idx: Optional[int] = None,
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    user=Depends(get_verified_user),
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):

    if url_idx == None:
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        model = form_data.model

        if ":" not in model:
            model = f"{model}:latest"

        if model in app.state.MODELS:
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            url_idx = random.choice(app.state.MODELS[model]["urls"])
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        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.model),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    r = None

    def get_request():
        nonlocal form_data
        nonlocal r

        request_id = str(uuid.uuid4())
        try:
            REQUEST_POOL.append(request_id)

            def stream_content():
                try:
                    if form_data.stream:
                        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:
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                            log.warning("User: canceled request")
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                            break
                finally:
                    if hasattr(r, "close"):
                        r.close()
                        if request_id in REQUEST_POOL:
                            REQUEST_POOL.remove(request_id)

            r = requests.request(
                method="POST",
                url=f"{url}/api/generate",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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                stream=True,
            )

            r.raise_for_status()

            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
            raise e

    try:
        return await run_in_threadpool(get_request)
    except Exception as e:
        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
        )


class ChatMessage(BaseModel):
    role: str
    content: str
    images: Optional[List[str]] = None


class GenerateChatCompletionForm(BaseModel):
    model: str
    messages: List[ChatMessage]
    format: Optional[str] = None
    options: Optional[dict] = None
    template: Optional[str] = None
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    stream: Optional[bool] = None
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    keep_alive: Optional[Union[int, str]] = None


@app.post("/api/chat")
@app.post("/api/chat/{url_idx}")
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async def generate_chat_completion(
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    form_data: GenerateChatCompletionForm,
    url_idx: Optional[int] = None,
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    user=Depends(get_verified_user),
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):

    if url_idx == None:
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        model = form_data.model

        if ":" not in model:
            model = f"{model}:latest"

        if model in app.state.MODELS:
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            url_idx = random.choice(app.state.MODELS[model]["urls"])
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        else:
            raise HTTPException(
                status_code=400,
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                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.model),
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            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    r = None

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    log.debug(
        "form_data.model_dump_json(exclude_none=True).encode(): {0} ".format(
            form_data.model_dump_json(exclude_none=True).encode()
        )
    )
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    def get_request():
        nonlocal form_data
        nonlocal r

        request_id = str(uuid.uuid4())
        try:
            REQUEST_POOL.append(request_id)

            def stream_content():
                try:
                    if form_data.stream:
                        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:
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                            log.warning("User: canceled request")
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                            break
                finally:
                    if hasattr(r, "close"):
                        r.close()
                        if request_id in REQUEST_POOL:
                            REQUEST_POOL.remove(request_id)

            r = requests.request(
                method="POST",
                url=f"{url}/api/chat",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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                stream=True,
            )

            r.raise_for_status()

            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
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            log.exception(e)
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            raise e

    try:
        return await run_in_threadpool(get_request)
    except Exception as e:
        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
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        )


# TODO: we should update this part once Ollama supports other types
class OpenAIChatMessage(BaseModel):
    role: str
    content: str

    model_config = ConfigDict(extra="allow")


class OpenAIChatCompletionForm(BaseModel):
    model: str
    messages: List[OpenAIChatMessage]

    model_config = ConfigDict(extra="allow")


@app.post("/v1/chat/completions")
@app.post("/v1/chat/completions/{url_idx}")
async def generate_openai_chat_completion(
    form_data: OpenAIChatCompletionForm,
    url_idx: Optional[int] = None,
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):

    if url_idx == None:
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        model = form_data.model

        if ":" not in model:
            model = f"{model}:latest"

        if model in app.state.MODELS:
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            url_idx = random.choice(app.state.MODELS[model]["urls"])
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        else:
            raise HTTPException(
                status_code=400,
                detail=ERROR_MESSAGES.MODEL_NOT_FOUND(form_data.model),
            )

    url = app.state.OLLAMA_BASE_URLS[url_idx]
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    log.info(f"url: {url}")
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    r = None

    def get_request():
        nonlocal form_data
        nonlocal r

        request_id = str(uuid.uuid4())
        try:
            REQUEST_POOL.append(request_id)

            def stream_content():
                try:
                    if form_data.stream:
                        yield json.dumps(
                            {"request_id": request_id, "done": False}
                        ) + "\n"

                    for chunk in r.iter_content(chunk_size=8192):
                        if request_id in REQUEST_POOL:
                            yield chunk
                        else:
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                            break
                finally:
                    if hasattr(r, "close"):
                        r.close()
                        if request_id in REQUEST_POOL:
                            REQUEST_POOL.remove(request_id)

            r = requests.request(
                method="POST",
                url=f"{url}/v1/chat/completions",
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                data=form_data.model_dump_json(exclude_none=True).encode(),
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                stream=True,
            )

            r.raise_for_status()

            return StreamingResponse(
                stream_content(),
                status_code=r.status_code,
                headers=dict(r.headers),
            )
        except Exception as e:
            raise e

    try:
        return await run_in_threadpool(get_request)
    except Exception as e:
        error_detail = "Open WebUI: Server Connection Error"
        if r is not None:
            try:
                res = r.json()
                if "error" in res:
                    error_detail = f"Ollama: {res['error']}"
            except:
                error_detail = f"Ollama: {e}"

        raise HTTPException(
            status_code=r.status_code if r else 500,
            detail=error_detail,
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        )


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@app.get("/v1/models")
@app.get("/v1/models/{url_idx}")
async def get_openai_models(
    url_idx: Optional[int] = None,
    user=Depends(get_verified_user),
):
    if url_idx == None:
        models = await get_all_models()

        if app.state.ENABLE_MODEL_FILTER:
            if user.role == "user":
                models["models"] = list(
                    filter(
                        lambda model: model["name"] in app.state.MODEL_FILTER_LIST,
                        models["models"],
                    )
                )

        return {
            "data": [
                {
                    "id": model["model"],
                    "object": "model",
                    "created": int(time.time()),
                    "owned_by": "openai",
                }
                for model in models["models"]
            ],
            "object": "list",
        }

    else:
        url = app.state.OLLAMA_BASE_URLS[url_idx]
        try:
            r = requests.request(method="GET", url=f"{url}/api/tags")
            r.raise_for_status()

            models = r.json()

            return {
                "data": [
                    {
                        "id": model["model"],
                        "object": "model",
                        "created": int(time.time()),
                        "owned_by": "openai",
                    }
                    for model in models["models"]
                ],
                "object": "list",
            }

        except Exception as e:
            log.exception(e)
            error_detail = "Open WebUI: Server Connection Error"
            if r is not None:
                try:
                    res = r.json()
                    if "error" in res:
                        error_detail = f"Ollama: {res['error']}"
                except:
                    error_detail = f"Ollama: {e}"

            raise HTTPException(
                status_code=r.status_code if r else 500,
                detail=error_detail,
            )


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class UrlForm(BaseModel):
    url: str


class UploadBlobForm(BaseModel):
    filename: str


def parse_huggingface_url(hf_url):
    try:
        # Parse the URL
        parsed_url = urlparse(hf_url)

        # Get the path and split it into components
        path_components = parsed_url.path.split("/")

        # Extract the desired output
        user_repo = "/".join(path_components[1:3])
        model_file = path_components[-1]

        return model_file
    except ValueError:
        return None


async def download_file_stream(
    ollama_url, file_url, file_path, file_name, chunk_size=1024 * 1024
):
    done = False

    if os.path.exists(file_path):
        current_size = os.path.getsize(file_path)
    else:
        current_size = 0

    headers = {"Range": f"bytes={current_size}-"} if current_size > 0 else {}

    timeout = aiohttp.ClientTimeout(total=600)  # Set the timeout

    async with aiohttp.ClientSession(timeout=timeout) as session:
        async with session.get(file_url, headers=headers) as response:
            total_size = int(response.headers.get("content-length", 0)) + current_size

            with open(file_path, "ab+") as file:
                async for data in response.content.iter_chunked(chunk_size):
                    current_size += len(data)
                    file.write(data)

                    done = current_size == total_size
                    progress = round((current_size / total_size) * 100, 2)
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                    yield f'data: {{"progress": {progress}, "completed": {current_size}, "total": {total_size}}}\n\n'

                if done:
                    file.seek(0)
                    hashed = calculate_sha256(file)
                    file.seek(0)

                    url = f"{ollama_url}/api/blobs/sha256:{hashed}"
                    response = requests.post(url, data=file)

                    if response.ok:
                        res = {
                            "done": done,
                            "blob": f"sha256:{hashed}",
                            "name": file_name,
                        }
                        os.remove(file_path)

                        yield f"data: {json.dumps(res)}\n\n"
                    else:
                        raise "Ollama: Could not create blob, Please try again."


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# def number_generator():
#     for i in range(1, 101):
#         yield f"data: {i}\n"


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# url = "https://huggingface.co/TheBloke/stablelm-zephyr-3b-GGUF/resolve/main/stablelm-zephyr-3b.Q2_K.gguf"
@app.post("/models/download")
@app.post("/models/download/{url_idx}")
async def download_model(
    form_data: UrlForm,
    url_idx: Optional[int] = None,
):

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    allowed_hosts = ["https://huggingface.co/", "https://github.com/"]

    if not any(form_data.url.startswith(host) for host in allowed_hosts):
        raise HTTPException(
            status_code=400,
            detail="Invalid file_url. Only URLs from allowed hosts are permitted.",
        )

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    if url_idx == None:
        url_idx = 0
    url = app.state.OLLAMA_BASE_URLS[url_idx]

    file_name = parse_huggingface_url(form_data.url)

    if file_name:
        file_path = f"{UPLOAD_DIR}/{file_name}"
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        return StreamingResponse(
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            download_file_stream(url, form_data.url, file_path, file_name),
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        )
    else:
        return None


@app.post("/models/upload")
@app.post("/models/upload/{url_idx}")
def upload_model(file: UploadFile = File(...), url_idx: Optional[int] = None):
    if url_idx == None:
        url_idx = 0
    ollama_url = app.state.OLLAMA_BASE_URLS[url_idx]

    file_path = f"{UPLOAD_DIR}/{file.filename}"

    # Save file in chunks
    with open(file_path, "wb+") as f:
        for chunk in file.file:
            f.write(chunk)

    def file_process_stream():
        nonlocal ollama_url
        total_size = os.path.getsize(file_path)
        chunk_size = 1024 * 1024
        try:
            with open(file_path, "rb") as f:
                total = 0
                done = False

                while not done:
                    chunk = f.read(chunk_size)
                    if not chunk:
                        done = True
                        continue

                    total += len(chunk)
                    progress = round((total / total_size) * 100, 2)

                    res = {
                        "progress": progress,
                        "total": total_size,
                        "completed": total,
                    }
                    yield f"data: {json.dumps(res)}\n\n"

                if done:
                    f.seek(0)
                    hashed = calculate_sha256(f)
                    f.seek(0)

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                    url = f"{ollama_url}/api/blobs/sha256:{hashed}"
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                    response = requests.post(url, data=f)

                    if response.ok:
                        res = {
                            "done": done,
                            "blob": f"sha256:{hashed}",
                            "name": file.filename,
                        }
                        os.remove(file_path)
                        yield f"data: {json.dumps(res)}\n\n"
                    else:
                        raise Exception(
                            "Ollama: Could not create blob, Please try again."
                        )

        except Exception as e:
            res = {"error": str(e)}
            yield f"data: {json.dumps(res)}\n\n"

    return StreamingResponse(file_process_stream(), media_type="text/event-stream")


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# async def upload_model(file: UploadFile = File(), url_idx: Optional[int] = None):
#     if url_idx == None:
#         url_idx = 0
#     url = app.state.OLLAMA_BASE_URLS[url_idx]

#     file_location = os.path.join(UPLOAD_DIR, file.filename)
#     total_size = file.size

#     async def file_upload_generator(file):
#         print(file)
#         try:
#             async with aiofiles.open(file_location, "wb") as f:
#                 completed_size = 0
#                 while True:
#                     chunk = await file.read(1024*1024)
#                     if not chunk:
#                         break
#                     await f.write(chunk)
#                     completed_size += len(chunk)
#                     progress = (completed_size / total_size) * 100

#                     print(progress)
#                     yield f'data: {json.dumps({"status": "uploading", "percentage": progress, "total": total_size, "completed": completed_size, "done": False})}\n'
#         except Exception as e:
#             print(e)
#             yield f"data: {json.dumps({'status': 'error', 'message': str(e)})}\n"
#         finally:
#             await file.close()
#             print("done")
#             yield f'data: {json.dumps({"status": "completed", "percentage": 100, "total": total_size, "completed": completed_size, "done": True})}\n'

#     return StreamingResponse(
#         file_upload_generator(copy.deepcopy(file)), media_type="text/event-stream"
#     )


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@app.api_route("/{path:path}", methods=["GET", "POST", "PUT", "DELETE"])
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async def deprecated_proxy(
    path: str, request: Request, user=Depends(get_verified_user)
):
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    url = app.state.OLLAMA_BASE_URLS[0]
    target_url = f"{url}/{path}"
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    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:
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                            log.warning("User: canceled request")
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                            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)
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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:
                    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,
        )