backend/open_webui/apps/webui/routers/utils.py

import site
from pathlib import Path

import black
import markdown
from open_webui.config import DATA_DIR, ENABLE_ADMIN_EXPORT
from open_webui.env import FONTS_DIR
from open_webui.constants import ERROR_MESSAGES
from fastapi import APIRouter, Depends, HTTPException, Response, status
from fpdf import FPDF
from pydantic import BaseModel
from starlette.responses import FileResponse
from open_webui.utils.misc import get_gravatar_url
from open_webui.utils.utils import get_admin_user

router = APIRouter()


@router.get("/gravatar")
async def get_gravatar(
    email: str,
):
    return get_gravatar_url(email)


class CodeFormatRequest(BaseModel):
    code: str


@router.post("/code/format")
async def format_code(request: CodeFormatRequest):
    try:
        formatted_code = black.format_str(request.code, mode=black.Mode())
        return {"code": formatted_code}
    except black.NothingChanged:
        return {"code": request.code}
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))


class MarkdownForm(BaseModel):
    md: str


@router.post("/markdown")
async def get_html_from_markdown(
    form_data: MarkdownForm,
):
    return {"html": markdown.markdown(form_data.md)}


class ChatForm(BaseModel):
    title: str
    messages: list[dict]


@router.post("/pdf")
async def download_chat_as_pdf(
    form_data: ChatForm,
):
    global FONTS_DIR

    pdf = FPDF()
    pdf.add_page()

    # When running using `pip install` the static directory is in the site packages.
    if not FONTS_DIR.exists():
        FONTS_DIR = Path(site.getsitepackages()[0]) / "static/fonts"
    # When running using `pip install -e .` the static directory is in the site packages.
    # This path only works if `open-webui serve` is run from the root of this project.
    if not FONTS_DIR.exists():
        FONTS_DIR = Path("./backend/static/fonts")

    pdf.add_font("NotoSans", "", f"{FONTS_DIR}/NotoSans-Regular.ttf")
    pdf.add_font("NotoSans", "b", f"{FONTS_DIR}/NotoSans-Bold.ttf")
    pdf.add_font("NotoSans", "i", f"{FONTS_DIR}/NotoSans-Italic.ttf")
    pdf.add_font("NotoSansKR", "", f"{FONTS_DIR}/NotoSansKR-Regular.ttf")
    pdf.add_font("NotoSansJP", "", f"{FONTS_DIR}/NotoSansJP-Regular.ttf")
    pdf.add_font("NotoSansSC", "", f"{FONTS_DIR}/NotoSansSC-Regular.ttf")

    pdf.set_font("NotoSans", size=12)
    pdf.set_fallback_fonts(["NotoSansKR", "NotoSansJP", "NotoSansSC"])

    pdf.set_auto_page_break(auto=True, margin=15)

    # Adjust the effective page width for multi_cell
    effective_page_width = (
        pdf.w - 2 * pdf.l_margin - 10
    )  # Subtracted an additional 10 for extra padding

    # Add chat messages
    for message in form_data.messages:
        role = message["role"]
        content = message["content"]
        pdf.set_font("NotoSans", "B", size=14)  # Bold for the role
        pdf.multi_cell(effective_page_width, 10, f"{role.upper()}", 0, "L")
        pdf.ln(1)  # Extra space between messages

        pdf.set_font("NotoSans", size=10)  # Regular for content
        pdf.multi_cell(effective_page_width, 6, content, 0, "L")
        pdf.ln(1.5)  # Extra space between messages

    # Save the pdf with name .pdf
    pdf_bytes = pdf.output()

    return Response(
        content=bytes(pdf_bytes),
        media_type="application/pdf",
        headers={"Content-Disposition": "attachment;filename=chat.pdf"},
    )


@router.get("/db/download")
async def download_db(user=Depends(get_admin_user)):
    if not ENABLE_ADMIN_EXPORT:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
        )
    from open_webui.apps.webui.internal.db import engine

    if engine.name != "sqlite":
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=ERROR_MESSAGES.DB_NOT_SQLITE,
        )
    return FileResponse(
        engine.url.database,
        media_type="application/octet-stream",
        filename="webui.db",
    )


@router.get("/litellm/config")
async def download_litellm_config_yaml(user=Depends(get_admin_user)):
    return FileResponse(
        f"{DATA_DIR}/litellm/config.yaml",
        media_type="application/octet-stream",
        filename="config.yaml",
    )