update
This commit is contained in:
352
backend/app/services/storage/minio_client.py
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352
backend/app/services/storage/minio_client.py
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# src/services/storage/minio_client.py
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"""MinIO对象存储客户端 - 文档文件存储"""
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from minio import Minio
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from minio.error import S3Error
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from typing import Optional, Dict, Any
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from loguru import logger
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from io import BytesIO
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import os
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from app.config.settings import settings
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class MinIOClient:
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"""MinIO对象存储客户端"""
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def __init__(
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self,
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endpoint: str = None,
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access_key: str = None,
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secret_key: str = None,
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bucket: str = None,
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secure: bool = None
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):
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"""
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初始化MinIO客户端
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Args:
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endpoint: MinIO服务地址
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access_key: 访问密钥
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secret_key: 秘密密钥
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bucket: 存储桶名称
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secure: 是否使用HTTPS
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"""
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self.endpoint = endpoint or settings.minio_endpoint
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self.access_key = access_key or settings.minio_access_key
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self.secret_key = secret_key or settings.minio_secret_key
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self.bucket = bucket or settings.minio_bucket
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self.secure = secure or settings.minio_secure
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self.client: Optional[Minio] = None
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self.connected = False
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logger.info(f"MinIO客户端配置: {self.endpoint}, bucket={self.bucket}")
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def connect(self) -> bool:
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"""连接MinIO服务"""
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try:
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self.client = Minio(
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self.endpoint,
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access_key=self.access_key,
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secret_key=self.secret_key,
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secure=self.secure
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)
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self.connected = True
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logger.success(f"MinIO连接成功: {self.endpoint}")
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return True
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except Exception as e:
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logger.error(f"MinIO连接失败: {e}")
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self.connected = False
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return False
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def ensure_bucket(self) -> bool:
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"""确保存储桶存在"""
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if not self.connected:
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logger.warning("未连接MinIO，请先调用connect()")
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return False
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try:
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if not self.client.bucket_exists(self.bucket):
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self.client.make_bucket(self.bucket)
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logger.success(f"创建存储桶: {self.bucket}")
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else:
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logger.info(f"存储桶已存在: {self.bucket}")
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return True
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except S3Error as e:
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logger.error(f"存储桶操作失败: {e}")
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return False
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def upload_file(
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self,
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file_path: str,
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object_name: str,
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metadata: Dict[str, Any] = None
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) -> bool:
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"""
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上传本地文件到MinIO
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Args:
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file_path: 本地文件路径
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object_name: MinIO对象名称
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metadata: 元数据
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Returns:
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bool: 是否成功
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"""
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if not self.connected:
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self.connect()
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self.ensure_bucket()
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try:
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file_size = os.stat(file_path).st_size
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content_type = self._get_content_type(file_path)
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with open(file_path, 'rb') as f:
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self.client.put_object(
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self.bucket,
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object_name,
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f,
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file_size,
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content_type=content_type,
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metadata=metadata
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)
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logger.success(f"文件上传成功: {object_name}, 大小={file_size}")
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return True
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except S3Error as e:
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logger.error(f"文件上传失败: {e}")
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return False
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def upload_bytes(
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self,
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data: bytes,
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object_name: str,
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content_type: str = "application/octet-stream",
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metadata: Dict[str, Any] = None
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) -> bool:
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"""
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上传字节数据到MinIO
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Args:
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data: 文件字节数据
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object_name: MinIO对象名称
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content_type: 内容类型
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metadata: 元数据（注意：MinIO仅支持US-ASCII字符）
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Returns:
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bool: 是否成功
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"""
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if not self.connected:
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self.connect()
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self.ensure_bucket()
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try:
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data_stream = BytesIO(data)
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# 处理metadata：仅保留ASCII安全字符
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safe_metadata = None
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if metadata:
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safe_metadata = {}
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for key, value in metadata.items():
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if isinstance(value, str):
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# 只保留ASCII字符或转换为安全格式
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try:
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value.encode('ascii')
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safe_metadata[key] = value
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except UnicodeEncodeError:
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# 中文字符跳过或用占位符
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safe_metadata[key] = ""
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else:
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safe_metadata[key] = str(value)
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self.client.put_object(
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self.bucket,
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object_name,
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data_stream,
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len(data),
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content_type=content_type,
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metadata=safe_metadata
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)
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logger.success(f"数据上传成功: {object_name}, 大小={len(data)}")
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return True
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except S3Error as e:
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logger.error(f"数据上传失败: {e}")
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return False
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def download_file(
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self,
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object_name: str,
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file_path: str
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) -> bool:
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"""
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从MinIO下载文件到本地
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Args:
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object_name: MinIO对象名称
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file_path: 本地保存路径
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Returns:
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bool: 是否成功
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"""
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if not self.connected:
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self.connect()
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try:
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self.client.fget_object(
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self.bucket,
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object_name,
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file_path
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)
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logger.success(f"文件下载成功: {object_name} -> {file_path}")
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return True
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except S3Error as e:
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logger.error(f"文件下载失败: {e}")
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return False
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def get_object_url(
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self,
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object_name: str,
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expires: int = 3600
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) -> Optional[str]:
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"""
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获取对象下载URL（临时URL）
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Args:
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object_name: MinIO对象名称
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expires: URL有效期（秒）
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Returns:
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str: 下载URL
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"""
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if not self.connected:
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self.connect()
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try:
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url = self.client.presigned_get_object(
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self.bucket,
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object_name,
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expires=expires
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)
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return url
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except S3Error as e:
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logger.error(f"获取URL失败: {e}")
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return None
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def get_object_data(self, object_name: str) -> Optional[bytes]:
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"""
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获取对象数据（字节）
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Args:
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object_name: MinIO对象名称
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Returns:
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bytes: 文件数据
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"""
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if not self.connected:
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self.connect()
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try:
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response = self.client.get_object(self.bucket, object_name)
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data = response.read()
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response.close()
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response.release_conn()
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return data
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except S3Error as e:
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logger.error(f"获取对象数据失败: {e}")
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return None
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def delete_object(self, object_name: str) -> bool:
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"""
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删除对象
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Args:
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object_name: MinIO对象名称
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Returns:
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bool: 是否成功
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"""
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if not self.connected:
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self.connect()
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try:
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self.client.remove_object(self.bucket, object_name)
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logger.info(f"对象删除成功: {object_name}")
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return True
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except S3Error as e:
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logger.error(f"对象删除失败: {e}")
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return False
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def list_objects(self, prefix: str = "") -> list:
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"""
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列出存储桶中的对象
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Args:
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prefix: 对象名称前缀
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Returns:
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list: 对象列表
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"""
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if not self.connected:
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self.connect()
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try:
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objects = self.client.list_objects(self.bucket, prefix=prefix)
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return [obj.object_name for obj in objects]
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except S3Error as e:
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logger.error(f"列出对象失败: {e}")
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return []
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def object_exists(self, object_name: str) -> bool:
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"""
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检查对象是否存在
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Args:
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object_name: MinIO对象名称
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Returns:
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bool: 是否存在
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"""
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if not self.connected:
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self.connect()
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try:
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self.client.stat_object(self.bucket, object_name)
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return True
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except S3Error:
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return False
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def _get_content_type(self, file_path: str) -> str:
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"""根据文件扩展名获取Content-Type"""
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ext = os.path.splitext(file_path)[1].lower()
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content_types = {
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'.pdf': 'application/pdf',
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'.doc': 'application/msword',
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'.docx': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'.txt': 'text/plain',
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'.json': 'application/json',
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'.xml': 'application/xml',
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}
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return content_types.get(ext, 'application/octet-stream')
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def close(self):
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"""关闭连接（MinIO客户端无需显式关闭）"""
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self.connected = False
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logger.info("MinIO客户端已关闭")
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def create_minio_client() -> MinIOClient:
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"""便捷函数：创建MinIO客户端"""
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client = MinIOClient()
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client.connect()
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client.ensure_bucket()
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return client
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