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91 lines
3.8 KiB
91 lines
3.8 KiB
import os
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from datetime import datetime
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from fastapi import BackgroundTasks, Request, UploadFile
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from config.env import UploadConfig
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from exceptions.exception import ServiceException
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from module_admin.entity.vo.common_vo import CrudResponseModel, UploadResponseModel
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from utils.upload_util import UploadUtil
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class CommonService:
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"""
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通用模块服务层
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"""
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@classmethod
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async def upload_service(cls, request: Request, file: UploadFile):
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"""
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通用上传service
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:param request: Request对象
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:param file: 上传文件对象
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:return: 上传结果
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"""
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if not UploadUtil.check_file_extension(file):
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raise ServiceException(message='文件类型不合法')
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else:
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relative_path = f'upload/{datetime.now().strftime("%Y")}/{datetime.now().strftime("%m")}/{datetime.now().strftime("%d")}'
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dir_path = os.path.join(UploadConfig.UPLOAD_PATH, relative_path)
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try:
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os.makedirs(dir_path)
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except FileExistsError:
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pass
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filename = f'{file.filename.rsplit(".", 1)[0]}_{datetime.now().strftime("%Y%m%d%H%M%S")}{UploadConfig.UPLOAD_MACHINE}{UploadUtil.generate_random_number()}.{file.filename.rsplit(".")[-1]}'
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filepath = os.path.join(dir_path, filename)
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with open(filepath, 'wb') as f:
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# 流式写出大型文件，这里的10代表10MB
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for chunk in iter(lambda: file.file.read(1024 * 1024 * 10), b''):
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f.write(chunk)
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return CrudResponseModel(
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is_success=True,
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result=UploadResponseModel(
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fileName=f'{UploadConfig.UPLOAD_PREFIX}/{relative_path}/{filename}',
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newFileName=filename,
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originalFilename=file.filename,
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url=f'{request.base_url}{UploadConfig.UPLOAD_PREFIX[1:]}/{relative_path}/{filename}',
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),
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message='上传成功',
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)
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@classmethod
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async def download_services(cls, background_tasks: BackgroundTasks, file_name, delete: bool):
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"""
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下载下载目录文件service
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:param background_tasks: 后台任务对象
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:param file_name: 下载的文件名称
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:param delete: 是否在下载完成后删除文件
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:return: 上传结果
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"""
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filepath = os.path.join(UploadConfig.DOWNLOAD_PATH, file_name)
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if '..' in file_name:
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raise ServiceException(message='文件名称不合法')
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elif not UploadUtil.check_file_exists(filepath):
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raise ServiceException(message='文件不存在')
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else:
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if delete:
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background_tasks.add_task(UploadUtil.delete_file, filepath)
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return CrudResponseModel(is_success=True, result=UploadUtil.generate_file(filepath), message='下载成功')
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@classmethod
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async def download_resource_services(cls, resource: str):
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"""
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下载上传目录文件service
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:param resource: 下载的文件名称
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:return: 上传结果
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"""
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filepath = os.path.join(resource.replace(UploadConfig.UPLOAD_PREFIX, UploadConfig.UPLOAD_PATH))
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filename = resource.rsplit('/', 1)[-1]
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if (
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'..' in filename
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or not UploadUtil.check_file_timestamp(filename)
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or not UploadUtil.check_file_machine(filename)
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or not UploadUtil.check_file_random_code(filename)
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):
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raise ServiceException(message='文件名称不合法')
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elif not UploadUtil.check_file_exists(filepath):
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raise ServiceException(message='文件不存在')
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else:
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return CrudResponseModel(is_success=True, result=UploadUtil.generate_file(filepath), message='下载成功')
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