101 lines
3.3 KiB
C#
101 lines
3.3 KiB
C#
using System;
|
||
using System.IO;
|
||
|
||
namespace Aop.Api.Util
|
||
{
|
||
/// <summary>
|
||
/// 文件元数据。
|
||
/// 可以使用以下几种构造方法：
|
||
/// 本地路径：new FileItem("C:/temp.jpg");
|
||
/// 本地文件：new FileItem(new FileInfo("C:/temp.jpg"));
|
||
/// 字节流：new FileItem("abc.jpg", bytes);
|
||
/// </summary>
|
||
public class FileItem
|
||
{
|
||
private string fileName;
|
||
private string mimeType;
|
||
private byte[] content;
|
||
private FileInfo fileInfo;
|
||
|
||
/// <summary>
|
||
/// 基于本地文件的构造器。
|
||
/// </summary>
|
||
/// <param name="fileInfo">本地文件</param>
|
||
public FileItem(FileInfo fileInfo)
|
||
{
|
||
if (fileInfo == null || !fileInfo.Exists)
|
||
{
|
||
throw new ArgumentException("fileInfo is null or not exists!");
|
||
}
|
||
this.fileInfo = fileInfo;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 基于本地文件全路径的构造器。
|
||
/// </summary>
|
||
/// <param name="filePath">本地文件全路径</param>
|
||
public FileItem(string filePath)
|
||
: this(new FileInfo(filePath))
|
||
{ }
|
||
|
||
/// <summary>
|
||
/// 基于文件名和字节流的构造器。
|
||
/// </summary>
|
||
/// <param name="fileName">文件名称（服务端持久化字节流到磁盘时的文件名）</param>
|
||
/// <param name="content">文件字节流</param>
|
||
public FileItem(string fileName, byte[] content)
|
||
{
|
||
if (string.IsNullOrEmpty(fileName)) throw new ArgumentNullException("fileName");
|
||
if (content == null || content.Length == 0) throw new ArgumentNullException("content");
|
||
|
||
this.fileName = fileName;
|
||
this.content = content;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 基于文件名、字节流和媒体类型的构造器。
|
||
/// </summary>
|
||
/// <param name="fileName">文件名（服务端持久化字节流到磁盘时的文件名）</param>
|
||
/// <param name="content">文件字节流</param>
|
||
/// <param name="mimeType">媒体类型</param>
|
||
public FileItem(String fileName, byte[] content, String mimeType)
|
||
: this(fileName, content)
|
||
{
|
||
if (string.IsNullOrEmpty(mimeType)) throw new ArgumentNullException("mimeType");
|
||
this.mimeType = mimeType;
|
||
}
|
||
|
||
public string GetFileName()
|
||
{
|
||
if (this.fileName == null && this.fileInfo != null && this.fileInfo.Exists)
|
||
{
|
||
this.fileName = this.fileInfo.FullName;
|
||
}
|
||
return this.fileName;
|
||
}
|
||
|
||
public string GetMimeType()
|
||
{
|
||
if (this.mimeType == null)
|
||
{
|
||
this.mimeType = AopUtils.GetMimeType(GetContent());
|
||
}
|
||
return this.mimeType;
|
||
}
|
||
|
||
public byte[] GetContent()
|
||
{
|
||
if (this.content == null && this.fileInfo != null && this.fileInfo.Exists)
|
||
{
|
||
using (Stream fileStream = this.fileInfo.OpenRead())
|
||
{
|
||
this.content = new byte[fileStream.Length];
|
||
fileStream.Read(content, 0, content.Length);
|
||
}
|
||
}
|
||
|
||
return this.content;
|
||
}
|
||
}
|
||
}
|