import { HttpException, HttpStatus } from '@nestjs/common';
/**
 * 文件上传基础异常类
 */
export declare class FileUploadException extends HttpException {
    readonly code: string;
    readonly details?: any;
    constructor(message: string, code: string, details?: any, status?: HttpStatus);
}
/**
 * 文件大小超限异常
 */
export declare class FileSizeExceededException extends FileUploadException {
    constructor(actualSize: number, maxSize: number);
}
/**
 * 文件类型不允许异常
 */
export declare class FileTypeNotAllowedException extends FileUploadException {
    constructor(mimeType: string, allowedTypes: string[]);
}
/**
 * 文件扩展名不允许异常
 */
export declare class FileExtensionNotAllowedException extends FileUploadException {
    constructor(extension: string, allowedExtensions: string[]);
}
/**
 * 文件签名不匹配异常
 */
export declare class FileSignatureMismatchException extends FileUploadException {
    constructor(error: string, reportedMime: string, detectedMime?: string);
}
/**
 * 文件损坏异常
 */
export declare class CorruptedFileException extends FileUploadException {
    constructor(mimeType: string, errors: string[]);
}
/**
 * 恶意文件异常
 */
export declare class MaliciousFileException extends FileUploadException {
    constructor(threats: string[]);
}
/**
 * 存储异常
 */
export declare class StorageException extends FileUploadException {
    constructor(operation: string, error: Error);
}
/**
 * 无效文件名异常
 */
export declare class InvalidFilenameException extends FileUploadException {
    constructor(filename: string);
}