private async Task <FileNode> DoUpload(string ownerId,
string path,
string name,
string md5,
string overwritten,
string tags = null)
{
FileData storageFileByMd5 = null;
long size = 0;
HttpPostedFileBase file = null;
if (!string.IsNullOrEmpty(md5))//根据md5直接获取storage file
{
try
{
storageFileByMd5 = _storageClient.GetFileData(md5);
size = storageFileByMd5.Size;
}
catch (Exception e)
{
throw new SysException(Infrastructure.ErrorCode.FileMd5NotFound);
}
}
else //根据Request.File获取file
{
if (Request.Files.Count != 1)
{
throw new SysException(Infrastructure.ErrorCode.OnlyOneFileAllowed, "只能上传一个文件." + Request.Files.Count);
}
file = Request.Files[0];
size = file.ContentLength;
}
FileNode fileToOverwrite = (path == null ? null : _nodeAppService.GetNode <FileNode>(ownerId, path, name));
var isModify = fileToOverwrite != null && overwritten == Boolean.TrueString;
//检查配额，及检查文件是否存在，放在这里做可以让Upload/Modify调storageClient.Upload的时序一致
long sizeToChange = size;
if (isModify)
{
sizeToChange -= fileToOverwrite.Size;
}
else if (fileToOverwrite != null)
{
throw new Exception("文件已存在.");
}
_quotaAppService.CheckQuota(ownerId, sizeToChange);
//storage上传
var storageFile = storageFileByMd5 ?? await _storageClient.UploadAsync(file.InputStream);
//增加/更新文件节点
FileNode fileNode = null;
if (isModify)
{
_storageClient.Remove(fileToOverwrite.StorageFileId);
_quotaAppService.Decrease(ownerId, fileToOverwrite.Size, fileToOverwrite.Id);
fileNode = _nodeAppService.ModifyFileNode(fileToOverwrite, size, storageFile.Id);
}
else
{
fileNode = _nodeAppService.CreateFileNode(ownerId, path, name, size, storageFile.Id, tags);
}
_quotaAppService.Increase(ownerId, size, fileNode.Id);
FileNodeChanged(fileNode);
return(fileNode);
}