/// <summary>
/// 为指定用户创建文件
/// </summary>
public async Task <FileStorageInfo> CreateFileAsync(FileOwnerTypeId ownerTypeId, string hash, Stream file, string fileName, int periodMinute = 0)
{
if (!_clusterSvce.CurrentServer.AllowUpload)
{
throw new FriendlyException("请从上传服务器上传");
}
string tmpFilePath = null;
try
{
var extName = Path.GetExtension(fileName);
if (string.IsNullOrEmpty(extName))
{
throw new FriendlyException("文件名缺少扩展名");
}
extName = extName.Substring(1).ToLower();
var mime = _mimeProvider.GetMimeByExtensionName(extName);
//获取hash
if (file != null)
{
tmpFilePath = await ReceiveToTempFileAsync(file);
//优先使用文件的hash
//hash = FileUtil.GetSha1(tmpFilePath);
}
if (string.IsNullOrWhiteSpace(hash))
{
throw new FriendlyException("hash 必需指定");
}
//throw new FriendlyException("file 与 hash 必需至少指定一个");
Task tSync = null;
var pseudoId = GeneratePseudoId(hash);
var fileInfo = await FileRepo.GetFileByHashAsync(pseudoId, hash);
//文件不存在，并且没有传file流
if (fileInfo == null && tmpFilePath == null)
{
throw new FileNotFoundException("File does not exist");
}
//检查所有者剩余配额
var fileSize = fileInfo?.Length ?? new System.IO.FileInfo(tmpFilePath).Length;
var remainQuota = await OwnerRepo.GetOwnerRemainQuotaAsync(ownerTypeId.OwnerType, ownerTypeId.OwnerId);
if (remainQuota < fileSize)
{
throw new FriendlyException("您已经没有足够的空间上传该文件");
}
Service.Options.Server recServer = null;
//检查存在否
if (fileInfo == null)
{
//插入新文件记录
recServer = _clusterSvce.ElectServer();
fileInfo = new File
{
ServerId = recServer.Id,
Length = new System.IO.FileInfo(tmpFilePath).Length,
MimeId = (int)mime.Id,
SHA1 = hash,
ExtInfo = string.Empty,
CreateTime = DateTime.Now
};
await FileRepo.AddFileAsync(fileInfo, pseudoId);
tSync = _clusterSvce.SyncFileToServerAsync(this, tmpFilePath, fileInfo, pseudoId, recServer);
}
else
{
recServer = _clusterSvce.GetServerById(fileInfo.ServerId);
var fileExists = await _clusterSvce.RawFileExistsAsync(this, recServer, pseudoId, fileInfo.CreateTime, fileInfo.Id);
if (!fileExists)
{
//通过hash进来的，并且文件不存在
if (string.IsNullOrEmpty(tmpFilePath))
{
await FileRepo.DeleteFileAsync(ownerTypeId.OwnerId, fileInfo.Id, pseudoId);
throw new FriendlyException("File does not exist(CFA-FE)");
}
//文件被删或意外丢失重传
tSync = _clusterSvce.SyncFileToServerAsync(this, tmpFilePath, fileInfo, pseudoId, recServer);
}
}
var fileOwner = await FileRepo.GetFileOwnerByOwnerAsync(pseudoId, fileInfo.Id, ownerTypeId.OwnerType, ownerTypeId.OwnerId);
if (fileOwner == null)
{
fileOwner = new FileOwner
{
FileId = fileInfo.Id,
Name = fileName,
OwnerType = ownerTypeId.OwnerType,
OwnerId = ownerTypeId.OwnerId,
CreateTime = DateTime.Now
};
await FileRepo.AddFileOwnerAsync(fileOwner, pseudoId);
}
if (tSync != null)
{
await tSync;
}
//添加配额使用量
await OwnerRepo.AddOwnerUsedQuotaAsync(ownerTypeId.OwnerType, ownerTypeId.OwnerId, fileSize);
return(new FileStorageInfo
{
File = fileInfo,
Owner = fileOwner,
Server = recServer,
PseudoId = pseudoId
});
}
finally
{
if (tmpFilePath != null)
{
FileUtil.TryDelete(tmpFilePath);
}
}
}