/// <summary>
/// 合并文件
/// </summary>
/// <returns></returns>
public void MergeFiles(HttpContext context)
{
bool rename = true;
bool.TryParse(context.Request.Form["rename"], out rename);
string visualFloder = context.Request["folder"];
string visualPath = _visualPath;
if (!string.IsNullOrWhiteSpace(visualFloder))
{
visualPath = visualFloder;
}
string root = context.Server.MapPath(visualPath);
string guid = context.Request["md5"];
string ext = context.Request["ext"];
string sourcePath = Path.Combine(root, "chunk\\" + guid + "\\"); //源数据文件夹
string targetPath = Path.Combine(root, string.Format("{0}.{1}", guid, ext)); //合并后的文件
if (!rename)
{
targetPath = Path.Combine(root, context.Request["fileName"]);//合并后的文件
}
AttachInfo attach = new AttachInfo();//待返回的数据
DirectoryInfo dicInfo = new DirectoryInfo(sourcePath);
if (Directory.Exists(Path.GetDirectoryName(sourcePath)))
{
FileInfo[] files = dicInfo.GetFiles();
foreach (FileInfo file in files.OrderBy(f => int.Parse(f.Name)))
{
FileStream addFile = new FileStream(targetPath, FileMode.Append, FileAccess.Write);
BinaryWriter AddWriter = new BinaryWriter(addFile);
//获得上传的分片数据流
Stream stream = file.Open(FileMode.Open);
BinaryReader TempReader = new BinaryReader(stream);
//将上传的分片追加到临时文件末尾
AddWriter.Write(TempReader.ReadBytes((int)stream.Length));
//关闭BinaryReader文件阅读器
TempReader.Close();
stream.Close();
AddWriter.Close();
addFile.Close();
TempReader.Dispose();
stream.Dispose();
AddWriter.Dispose();
addFile.Dispose();
}
DeleteFolder(sourcePath);
attach.code = 0; //成功
attach.errormsg = "";
attach.chunked = true; //进行了分片处理
attach.hasError = false;
context.Response.Write(JsonConvert.SerializeObject(attach));
}
else
{
attach.code = 0; //成功
attach.errormsg = "";
attach.chunked = true; //进行了分片处理
attach.hasError = true;
context.Response.Write(JsonConvert.SerializeObject(attach));
}
}
/// <summary>
/// 获取指定文件的已上传的文件块
/// </summary>
/// <returns></returns>
public void GetMaxChunk(HttpContext context)
{
bool rename = true;
string host = context.Request["host"];
bool.TryParse(context.Request["rename"], out rename);
string visualFloder = context.Request["folder"];
string visualPath = _visualPath;
if (!string.IsNullOrWhiteSpace(visualFloder))
{
visualPath = visualFloder;
}
string root = context.Server.MapPath(visualPath);
AttachInfo attach = new AttachInfo();//待返回的数据
var md5 = Convert.ToString(context.Request["md5"]);
var ext = Convert.ToString(context.Request["ext"]);
int chunk = 0;
var fileName = md5 + "." + ext;
if (!rename)
{
fileName = context.Request["fileName"];
}
try
{
FileInfo file = new FileInfo(root + fileName);
if (file.Exists) //文件存在，则直接返回
{
attach.code = 0; //成功
attach.errormsg = "";
attach.exists = true;
attach.chunk = Int32.MaxValue;//如果文件存在，则返回整型的最大值，插件自动识别，实现秒传
attach.path = string.Format("{0}{1}", visualPath, fileName);
if (!string.IsNullOrWhiteSpace(host))
{
attach.fullPath = string.Format("{0}/{1}{2}", host.Trim().TrimEnd('/'), visualPath.Trim().TrimStart('/'), fileName);
}
attach.extension = ext;
attach.md5 = md5;
attach.size = file.Length;
}
else//不存在，则返回分片大小
{
if (Directory.Exists(root + "chunk\\" + md5))
{
DirectoryInfo dicInfo = new DirectoryInfo(root + "chunk\\" + md5);
var files = dicInfo.GetFiles();
chunk = files.Count();
if (chunk > 1)
{
chunk = chunk - 1; //当文件上传中时，页面刷新，上传中断，这时最后一个保存的块的大小可能会有异常，所以这里直接删除最后一个块文件
}
}
attach.code = 0;//成功
attach.errormsg = "";
attach.exists = false;
attach.chunk = chunk;//如果文件存在，则返回整型的最大值，插件自动识别，实现秒传
attach.path = string.Format("{0}{1}", _visualPath, fileName);
attach.extension = ext;
attach.md5 = md5;
if (!string.IsNullOrWhiteSpace(host))
{
attach.fullPath = string.Format("{0}/{1}{2}", host.Trim().TrimEnd('/'), visualPath.Trim().TrimStart('/'), fileName);
}
attach.size = file.Length;
}
context.Response.Write(JsonConvert.SerializeObject(attach));
}
catch
{
attach.code = 1;//失败
attach.exists = false;
attach.errormsg = "";
attach.chunk = 0;//如果文件存在，则返回整型的最大值，插件自动识别，实现秒传
attach.path = string.Format("{0}{1}", _visualPath, fileName);
attach.extension = ext;
attach.md5 = md5;
attach.size = 0;
if (!string.IsNullOrWhiteSpace(host))
{
attach.fullPath = string.Format("{0}/{1}{2}", host.Trim().TrimEnd('/'), visualPath.Trim().TrimStart('/'), fileName);
}
context.Response.Write(JsonConvert.SerializeObject(attach));
}
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="fileData"></param>
/// <returns></returns>
public void Upload(HttpContext context)
{
bool rename = true;
bool.TryParse(context.Request.Form["rename"], out rename);
string visualFloder = context.Request.Form["folder"];
string visualPath = _visualPath;
if (!string.IsNullOrWhiteSpace(visualFloder))
{
visualPath = visualFloder;
}
HttpPostedFile file = context.Request.Files[0];
string root = context.Server.MapPath(visualPath);
AttachInfo attach = new AttachInfo();//待返回的数据
string md5 = context.Request["md5"];
string ext = Path.GetExtension(file.FileName);
//检查上传的物理路径是否存在，不存在则创建
if (!Directory.Exists(root))
{
Directory.CreateDirectory(root);
}
//如果进行了分片
if (context.Request.Form.AllKeys.Any(m => m == "chunk"))
{
//取得chunk和chunks
int chunk = Convert.ToInt32(context.Request.Form["chunk"]); //当前分片在上传分片中的顺序（从0开始）
int chunks = Convert.ToInt32(context.Request.Form["chunks"]); //总分片数
//根据GUID创建用该GUID命名的临时文件夹
string folder = root + "chunk\\" + context.Request["md5"] + "\\";
string path = folder + chunk;
//建立临时传输文件夹
if (!Directory.Exists(Path.GetDirectoryName(folder)))
{
Directory.CreateDirectory(folder);
}
FileStream addFile = null;
BinaryWriter AddWriter = null;
Stream stream = null;
BinaryReader TempReader = null;
try
{
addFile = new FileStream(path, FileMode.Create, FileAccess.Write);
AddWriter = new BinaryWriter(addFile);
//获得上传的分片数据流
stream = file.InputStream;
TempReader = new BinaryReader(stream);
//将上传的分片追加到临时文件末尾
AddWriter.Write(TempReader.ReadBytes((int)stream.Length));
}
finally
{
if (addFile != null)
{
addFile.Close();
addFile.Dispose();
}
if (AddWriter != null)
{
AddWriter.Close();
AddWriter.Dispose();
}
if (stream != null)
{
stream.Close();
stream.Dispose();
}
if (TempReader != null)
{
TempReader.Close();
TempReader.Dispose();
}
}
attach.code = 0; //成功
attach.errormsg = "";
attach.chunked = true; //进行了分片处理
attach.extension = Path.GetExtension(file.FileName); //文件扩展名
context.Response.Write(JsonConvert.SerializeObject(attach));
}
else//没有分片直接保存
{
string path = root + md5 + ext;
if (!rename)
{
path = root + file.FileName;
}
file.SaveAs(path);
attach.code = 0; //成功
attach.errormsg = "";
attach.chunked = false; //直接保存，没有进行分片处理
attach.extension = ext; //文件扩展名
context.Response.Write(JsonConvert.SerializeObject(attach));
}
}
