public MessageEntity RequestUploadFile([FromBody] RequestFileUploadEntity requestFile)
{
//LogUtil.Debug($"RequestUploadFile 接收参数：{JsonConvert.SerializeObject(requestFile)}");
MessageEntity message = new MessageEntity();
if (requestFile.size <= 0 || requestFile.count <= 0 || string.IsNullOrEmpty(requestFile.filedata))
{
message.Code = -1;
message.Msg = "参数有误";
}
else
{
//这里需要记录文件相关信息，并返回文件guid名，后续请求带上此参数
string guidName = Guid.NewGuid().ToString("N");
//前期单台服务器可以记录Cache，多台后需考虑redis或数据库
_cache.Set(guidName, requestFile);
message.Code = 0;
message.Msg = "";
message.Data = new { filename = guidName };
}
return(message);
}
public MessageEntity RequestDownloadFile([FromBody] Dictionary <string, object> fileInfo)
{
MessageEntity message = new MessageEntity();
string fileName = string.Empty;
string fileExt = string.Empty;
if (fileInfo.ContainsKey("name"))
{
fileName = fileInfo["name"].ToString();
}
if (fileInfo.ContainsKey("ext"))
{
fileExt = fileInfo["ext"].ToString();
}
if (string.IsNullOrEmpty(fileName))
{
message.Code = -1;
message.Msg = "文件名不能为空";
return(message);
}
//获取对应目录下文件，如果有，获取文件开始准备分段下载
string filePath = $".{Appsettings.app(new string[] { "TestFileHandle", "FilePath" })}{DateTime.Now.ToString("yyyy-MM-dd")}/{fileName}";
filePath = $"{filePath}{fileExt}";
FileStream fs = null;
try
{
if (!System.IO.File.Exists(filePath))
{
//文件为空
message.Code = -1;
message.Msg = "文件尚未处理完";
return(message);
}
fs = new FileStream(filePath, FileMode.Open);
if (fs.Length <= 0)
{
//文件为空
message.Code = -1;
message.Msg = "文件尚未处理完";
return(message);
}
int shardSize = 1 * 1024 * 1024;//一次1M
RequestFileUploadEntity request = new RequestFileUploadEntity();
request.fileext = fileExt;
request.size = fs.Length;
request.count = (int)(fs.Length / shardSize);
if ((fs.Length % shardSize) > 0)
{
request.count += 1;
}
request.filedata = GetCryptoString(fs);
message.Data = request;
}
catch (Exception ex)
{
//LogUtil.Debug($"读取文件信息失败：{filePath}，错误信息：{ex.Message}");
}
finally
{
if (fs != null)
{
fs.Close();
}
}
return(message);
}
public async Task <MessageEntity> FileMerge([FromBody] Dictionary <string, object> fileInfo)
{
MessageEntity message = new MessageEntity();
string fileName = string.Empty;
if (fileInfo.ContainsKey("name"))
{
fileName = fileInfo["name"].ToString();
}
if (string.IsNullOrEmpty(fileName))
{
message.Code = -1;
message.Msg = "文件名不能为空";
return(message);
}
//最终上传完成后，请求合并返回合并消息
try
{
RequestFileUploadEntity requestFile = _cache.Get(fileName) as RequestFileUploadEntity;
if (requestFile == null)
{
message.Code = -1;
message.Msg = "合并失败";
return(message);
}
string filePath = $".{Appsettings.app(new string[] { "TestFileHandle", "FilePath" })}{DateTime.Now.ToString("yyyy-MM-dd")}/{fileName}";
string fileExt = requestFile.fileext;
string fileMd5 = requestFile.filedata;
int fileCount = requestFile.count;
long fileSize = requestFile.size;
string fileTestname = requestFile.filename;
//LogUtil.Debug($"获取文件路径：{filePath}");
//LogUtil.Debug($"获取文件类型：{fileExt}");
string savePath = filePath.Replace(fileName, "");
string saveFileName = $"{fileTestname}";
var files = Directory.GetFiles(filePath);
string fileFinalName = Path.Combine(savePath, saveFileName);
//LogUtil.Debug($"获取文件最终路径：{fileFinalName}");
FileStream fs = new FileStream(fileFinalName, FileMode.Create);
//LogUtil.Debug($"目录文件下文件总数：{files.Length}");
//LogUtil.Debug($"目录文件排序前：{string.Join(",", files.ToArray())}");
//LogUtil.Debug($"目录文件排序后：{string.Join(",", files.OrderBy(x => x.Length).ThenBy(x => x))}");
byte[] finalBytes = new byte[fileSize];
foreach (var part in files.OrderBy(x => x.Length).ThenBy(x => x))
{
var bytes = System.IO.File.ReadAllBytes(part);
await fs.WriteAsync(bytes, 0, bytes.Length);
bytes = null;
System.IO.File.Delete(part);//删除分块
}
fs.Close();
//这个地方会引发文件被占用异常
fs = new FileStream(fileFinalName, FileMode.Open);
string strMd5 = GetCryptoString(fs);
//LogUtil.Debug($"文件数据MD5：{strMd5}");
//LogUtil.Debug($"文件上传数据：{JsonConvert.SerializeObject(requestFile)}");
fs.Close();
Directory.Delete(filePath);
//如果MD5与原MD5不匹配，提示重新上传
if (strMd5 != requestFile.filedata)
{
//LogUtil.Debug($"上传文件md5：{requestFile.filedata},服务器保存文件md5：{strMd5}");
message.Code = -1;
message.Msg = "MD5值不匹配";
return(message);
}
_cache.Remove(fileInfo["name"].ToString());
message.Code = 0;
message.Msg = "";
}
catch (Exception ex)
{
//LogUtil.Error($"合并文件失败，文件名称：{fileName}，错误信息：{ex.Message}");
message.Code = -1;
message.Msg = "合并文件失败,请重新上传";
}
return(message);
}
