/// <summary>
/// 序列化记录文件的数据一致性校验
/// Md5值；文件的名字、大小、最后修改时间；CheckSum值
/// </summary>
/// <param name="uploadFile"></param>
/// <param name="uploadStream"></param>
/// <param name="enableCheckSum"></param>
/// <returns></returns>
public bool IsValid(string uploadFile, Stream uploadStream, bool enableCheckSum, ResumableUploadTypeEnum uploadType)
{
if (this.Md5 != ComputeHash.HashCode <UploadCheckPoint>(this))
{
return(false);
}
if (uploadType == ResumableUploadTypeEnum.UploadFile)
{
FileInfo upload = new FileInfo(uploadFile);
if (this.FileStatus.Size != upload.Length || this.FileStatus.LastModified != upload.LastWriteTime)
{
return(false);
}
}
else if (this.FileStatus.Size != uploadStream.Length - uploadStream.Position)
{
return(false);
}
if (enableCheckSum)
{
if (this.FileStatus.CheckSum != null)
{
try
{
if (uploadType == ResumableUploadTypeEnum.UploadFile)
{
using (FileStream fileStream = new FileStream(uploadFile, FileMode.Open))
{
//校验CheckSum值--UploadFile文件的一致性
return(this.FileStatus.CheckSum.Equals(CommonUtil.Base64Md5(fileStream)));
}
}
else
{
//校验CheckSum值--UploadStream流的一致性
long originPosition = uploadStream.Position;
bool flag = this.FileStatus.CheckSum.Equals(CommonUtil.Base64Md5(uploadStream));
uploadStream.Seek(originPosition, SeekOrigin.Begin);
return(flag);
}
}
catch (Exception ex)
{
ObsException e = new ObsException(ex.Message, ex.InnerException);
e.ErrorType = ErrorType.Sender;
throw e;
}
}
}
return(true);
}
/// <summary>
/// 获取待上传文件/数据流的状态信息
/// </summary>
/// <param name="uploadFile"></param>
/// <param name="uploadStream"></param>
/// <param name="checkSum"></param>
/// <returns></returns>
public static FileStatus getFileStatus(string uploadFile, Stream uploadStream, bool checkSum, ResumableUploadTypeEnum uploadType)
{
FileStatus fileStatus = new FileStatus();
if (uploadType == ResumableUploadTypeEnum.UploadFile)
{
FileInfo fileInfo = new FileInfo(uploadFile);
fileStatus.Size = fileInfo.Length;
fileStatus.LastModified = fileInfo.LastWriteTime;
}
else
{
fileStatus.Size = uploadStream.Length - uploadStream.Position;
//数据流方式LastModified置为空
fileStatus.LastModified = null;
}
//若开启文件内容校验
if (checkSum)
{
try
{
if (uploadType == ResumableUploadTypeEnum.UploadFile)
{
using (FileStream fileStream = new FileStream(uploadFile, FileMode.Open))
{
//计算UploadFile的hash值
fileStatus.CheckSum = CommonUtil.Base64Md5(fileStream);
}
}
else
{
//计算UploadStream的hash值
long originPosition = uploadStream.Position;
fileStatus.CheckSum = CommonUtil.Base64Md5(uploadStream);
uploadStream.Seek(originPosition, SeekOrigin.Begin);
}
}
catch (Exception ex)
{
ObsException e = new ObsException(ex.Message, ex.InnerException);
e.ErrorType = ErrorType.Sender;
throw e;
}
}
return(fileStatus);
}
public static string HashCode <T>(T obj)
{
StringBuilder sb = new StringBuilder();
Type type = obj.GetType();
foreach (var property in type.GetProperties())
{
//UploadCheckPoint类的hash值计算不包含属性Md5和UploadStream
if (property.Name.Equals("Md5") || property.Name.Equals("UploadStream"))
{
continue;
}
sb.Append(property.Name + ":" + property.GetValue(obj, null));
}
byte[] content = Encoding.UTF8.GetBytes(sb.ToString());
return(CommonUtil.Base64Md5(content));
}