/// <summary>
/// 无论啥错误都会返回一个默认的
/// </summary>
/// <param name="cfgBytes"></param>
/// <returns></returns>
public static FileMapGroupInfo ReadFromByteBuf(byte[] cfgBytes)
{
var group = new FileMapGroupInfo();
var byteBuf = ByteBuf.CreateFromBytes(cfgBytes);
group.MD51 = byteBuf.ReadLong();
group.MD52 = byteBuf.ReadLong();
group.Ver = new Version()
{
Version_Major = byteBuf.ReadInt(),
Version_Minor = byteBuf.ReadInt(),
Version_Build = byteBuf.ReadInt(),
};
var readedMd5 = MD5Creater.MD5Struct.CreateFromLong(group.MD51, group.MD52);
var fileMD5 = MD5Creater.GenerateMd5Code(cfgBytes, 16);
if (!readedMd5.Equals(fileMD5))
{
CommonLog.Error("MD5校验不通过！");
return(null);
}
int FileNum = byteBuf.ReadInt();
group.AllFileMapInfo = new FileMapInfo[FileNum];
for (int i = 0; i < group.AllFileMapInfo.Length; i++)
{
group.AllFileMapInfo[i] = FileMapInfo.ReadFromByteBuf(byteBuf);
}
return(group);
}
private (WebRequestError, string) CheckWebRequestError(SingleFileDownloadRequest sr,
UnityWebRequest request)
{
var error = request.error;
if (!string.IsNullOrEmpty(error))
{
return(WebRequestError.Raw, error);
}
if (!File.Exists(sr.targetPath))
{
error = $"download finish but {sr.targetPath} not exist";
return(WebRequestError.NoExist, error);
}
if (sr.md5 != null)
{
var bs = File.ReadAllBytes(sr.targetPath);
var md5Struct = MD5Creater.GenerateMd5Code(bs);
var bm = sr.md5.Value;
if (md5Struct.MD51 != bm.MD51 || md5Struct.MD52 != bm.MD52)
{
error =
$"download file {sr.targetPath} md5 error {md5Struct.GetMD5Str(false)}->{bm.GetMD5Str(false)}";
return(WebRequestError.Md5, error);
}
}
return(WebRequestError.None, null);
}
public MD5Creater.MD5Struct WriteToByteBuf(ByteBuf buf)
{
//标记MD5
int firstIndex = buf.WriterIndex;
buf.WriteLong(0);
buf.WriteLong(0);
//写入Ver
buf.WriteInt(Ver.Version_Major);
buf.WriteInt(Ver.Version_Minor);
buf.WriteInt(Ver.Version_Build);
//data
buf.WriteInt(AllFileMapInfo.Length);
for (int i = 0; i < AllFileMapInfo.Length; i++)
{
var info = AllFileMapInfo[i];
info.WriteToByteBuf(buf);
}
int finalIndex = buf.WriterIndex;
var bytelen = finalIndex - firstIndex;
//计算MD5
var fileMD5 = MD5Creater.GenerateMd5Code(buf.GetRaw(), firstIndex + 16, bytelen - 16);
buf.SetWriterIndex(firstIndex);
buf.WriteLong(fileMD5.MD51);
buf.WriteLong(fileMD5.MD52);
buf.SetWriterIndex(finalIndex);
return(fileMD5);
}
private void CheckMd5AndReplaceTempFile(RequestState myRequestState)
{
var ms = new MemoryStream();
myRequestState.m_file_stream.Position = 0;
myRequestState.m_file_stream.CopyTo(ms);
var md5Struct = MD5Creater.GenerateMd5Code(ms.ToArray());
myRequestState.m_file_stream.Close();
ms.Dispose();
var pathRoot = UnityPersistFileHelper.GetPersistAssetFilePath(SavedDir, "");
if (md5Struct.MD51 == myRequestState.fileInfo.MapedFileName_MD51 &&
md5Struct.MD52 == myRequestState.fileInfo.MapedFileName_MD52)
{
CommonLog.Log($"complete download file {myRequestState.fileInfo.FileName}");
myRequestState.progress.RealCompletedSize -= myRequestState.downloadedSize;
myRequestState.progress.RealCompletedSize +=
myRequestState.fileInfo.FileSize; //myRequestState.fileSize;
myRequestState.progress.UpdateProgress();
FileUtils.RenameFile(pathRoot, myRequestState.fileInfo.FileName + TempExtension,
myRequestState.fileInfo.FileName);
}
else
{
var tempFilePath = pathRoot + myRequestState.fileInfo.FileName + TempExtension;
CommonLog.Error(MAuthor.WY,
$"file {myRequestState.fileInfo.FileName} md5 error, delete file {tempFilePath}");
FileUtils.DeleteFile(tempFilePath);
myRequestState.progress.SetException("md5 check failed",
WWWFileDownloader.eWWWErrorType.WriteFileError);
}
}