rag-gateway/app/api/excel.py

from fastapi import APIRouter, File, UploadFile, Form, BackgroundTasks, Depends
from fastapi.responses import JSONResponse, FileResponse
from starlette.websockets import WebSocket

from app.api import get_current_user, get_current_user_websocket
from app.models import UserModel
from app.utils.excelmerge.conformity import run_conformity
import shutil
import os

router = APIRouter()

ALLOWED_EXTENSIONS = {'xlsx'}
EXCEL_FILES_PATH = 'data/output'
SOURCE_FILES_PATH = 'data/source'


def allowed_file(filename: str) -> bool:
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS


def create_dir_if_not_exists(path: str):
    if not os.path.exists(path):
        os.makedirs(path)


def clear_directory(path: str) -> dict:
    for filename in os.listdir(path):
        file_path = os.path.join(path, filename)
        try:
            if os.path.isfile(file_path) or os.path.islink(file_path):
                os.unlink(file_path)
            elif os.path.isdir(file_path):
                shutil.rmtree(file_path)
        except Exception as e:
            return {"error": "清空出错"}
    return {"message": "目录已清空"}


def user_file_path(userid: str, path: str) -> str:
    return os.path.join(path, userid)


@router.post('/excel/upload')
async def upload_file(files: list[UploadFile] = File(...), current_user: UserModel = Depends(get_current_user)):
    user_id = str(current_user.id)
    if not any(file.filename for file in files):
        return JSONResponse(content={"error": "没有文件部分"}, status_code=400)
    if not user_id:
        return JSONResponse(content={"error": "缺少参数user_id"}, status_code=400)
    user_source = user_file_path(user_id, SOURCE_FILES_PATH)
    user_excel = EXCEL_FILES_PATH

    create_dir_if_not_exists(user_source)
    create_dir_if_not_exists(user_excel)
    clear_directory(user_source)

    save_path_list = []
    for file in files:
        if file.filename == '':
            return JSONResponse(content={"error": "没有选择文件"}, status_code=400)
        if file and allowed_file(file.filename):
            save_path = os.path.join(user_source, file.filename)
            with open(save_path, 'wb') as buffer:
                shutil.copyfileobj(file.file, buffer)
            save_path_list.append(save_path)
        else:
            return JSONResponse(content={"error": "不允许的文件类型"}, status_code=400)
    return JSONResponse(content={"code": 200, "msg": "", "data": {}}, status_code=200)


# ws://localhost:9201/api/document/ws/excel
@router.websocket("/ws/excel")
async def ws_excel(websocket: WebSocket, current_user: UserModel = Depends(get_current_user_websocket)):
    await websocket.accept()
    user_id = str(current_user.id)

    user_source = user_file_path(user_id, SOURCE_FILES_PATH)
    user_excel = EXCEL_FILES_PATH
    create_dir_if_not_exists(user_source)
    create_dir_if_not_exists(user_excel)

    while True:
        data = await websocket.receive_text()
        try:
            if data == "\"合并Excel\"":
                merge_file = run_conformity(user_source, user_excel)
                if merge_file is not None:

                    await websocket.send_json({
                        "message": "文档合并成功！",
                        "type": "stream",
                        "file_name": f"{merge_file}.xlsx",
                        "download_url": f"./api/document/download/{merge_file}.xlsx"
                    })
                    await websocket.send_json({
                        "message": "文档合并成功！",
                        "type": "close",
                    })
                else:
                    await websocket.send_json({"error": "合并失败", "type": "stream", "files": []})
            else:
                print(f"Received data: {data}")
                await websocket.send_json({"error": "未知指令", "data": str(data)})
        except Exception as e:
            await websocket.send_json({"error": str(e)})
            await websocket.close()


@router.get("/download/{file_full_name}")
async def download_file(background_tasks: BackgroundTasks, file_full_name: str):
    file_name = os.path.basename(file_full_name)
    user_excel = EXCEL_FILES_PATH
    file_path = os.path.join(user_excel, file_full_name)

    if not os.path.exists(file_path):
        return JSONResponse(content={"error": "文件不存在"}, status_code=404)

    def delete_file():
        try:
            os.unlink(file_path)
        except OSError as e:
            print(f"Deleting file error")

    # 待下载完成后删除生成的文件
    background_tasks.add_task(delete_file)
    return FileResponse(path=file_path, filename=file_name,
                        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")