/// <summary>
/// 获取文件MD5
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
public static string GetMD5(this FileInfo file)
{
if (!file.Exists)
{
throw new Exception($"无法读取MD5，文件{file.FullName}不存在");
}
return(SecureHelper.GetFileMD5(file.FullName));
}
public string UploadFileAfterCheckRepeat(FileInfo file, string uid,
ref string file_url, ref string file_name, bool DeleteFileAfterUploadToQiniu = true)
{
try
{
if (!file.Exists)
{
throw new Exception("无法在磁盘上找到文件");
}
var dal = new UpFileDal();
var dbmodel = new UpFileModel();
dbmodel.UserID = uid;
dbmodel.FileName = file.Name;
dbmodel.FileExt = file.Extension;
dbmodel.FileSize = (int)file.Length;
dbmodel.FilePath = file.FullName;
dbmodel.CreateTime = DateTime.Now;
//获取文件md5值
dbmodel.FileMD5 = SecureHelper.GetFileMD5(dbmodel.FilePath);
if (!ValidateHelper.IsPlumpString(dbmodel.FileMD5))
{
throw new Exception("获取文件MD5失败");
}
//判断文件是否存在于七牛
var qiniu_file = QiniuHelper.FindEntry(dbmodel.FileMD5);
bool FindInQiniu = qiniu_file.HasFile();
bool uploadToQiniuByMe = false;
if (FindInQiniu)
{
//直接拿七牛中的文件地址
dbmodel.FileUrl = QiniuHelper.GetUrl(dbmodel.FileMD5);
}
else
{
var url = QiniuHelper.Upload(file.FullName, dbmodel.FileMD5);
dbmodel.FileUrl = url;
//标记文件是我上传到七牛的
uploadToQiniuByMe = true;
}
//运行到这里，七牛已经有文件了
//判断是否要添加到数据库
var res = AddFile(dbmodel);
if (ValidateHelper.IsPlumpString(res))
{
//如果是我上传到七牛的并且保存本地数据库失败就删除
if (uploadToQiniuByMe)
{
QiniuHelper.Delete(dbmodel.FileMD5);
}
return("保存到数据库失败");
}
file_name = dbmodel.FileName;
file_url = dbmodel.FileUrl;
return(SUCCESS);
}
catch (Exception e)
{
throw e;
}
finally
{
if (DeleteFileAfterUploadToQiniu)
{
file.Delete();
}
}
}
