public async Task <ServiceResult <BinaryFile> > SaveFile(IFormFile file)
{
if (file.Length > 1 << 20)
{
return(Fail <BinaryFile>(null, "文件过大"));
}
var binaryFile = new BinaryFile {
Bytes = new byte[file.Length],
ContentType = file.ContentType,
FileName = file.FileName
};
using (var fileStream = file.OpenReadStream())
{
await fileStream.ReadAsync(binaryFile.Bytes, 0, Convert.ToInt32(file.Length));
}
binaryFile.MD5 = MD5Service.MD5Generate(binaryFile.Bytes);
var existfiles = Context.BinaryFiles.Where(f => f.MD5.StartsWith(binaryFile.MD5));
if (existfiles.Any())
{
foreach (var existfile in existfiles)
{
// compare the actual bytes...
if (!BytesCompare(existfile.Bytes, binaryFile.Bytes))
{
// unluckily, we had to add time suffix...
binaryFile.MD5 += DateTime.Now.ToString();
Logger.Log(LogLevel.Debug, "Congratulations! We found file md5 crash in two different files!");
}
else
{
return(Exist(existfile, "相同文件已存在"));
}
}
}
Context.BinaryFiles.Add(binaryFile);
await Context.SaveChangesAsync();
return(Success(binaryFile, "文件保存成功"));
}
public DbFileService(XueLeMeContext xueLeMeContext, MD5Service mD5Service, ILogger <DbFileService> logger)
{
Context = xueLeMeContext;
MD5Service = mD5Service;
Logger = logger;
}
public MD5SecurityService(MD5Service mD5Service)
{
MD5Service = mD5Service;
}
