/// <summary>
/// 创建文件缓存路径
/// </summary>
/// <param name="chunk">文件分段信息</param>
/// <returns>文件缓存路径</returns>
protected virtual string CreateUrl(ChunkInfo chunk)
{
try
{
Task.Factory.StartNew(Clear);
}
catch { }
_mutex.WaitOne();
try
{
var url = GetUrl(DateTime.Today, chunk.AttachKey, chunk.UploadKey);
if (io.Directory.Exists(url))
{
io.Directory.CreateDirectory(url);
}
return(url);
}
finally
{
_mutex.ReleaseMutex();
}
}
/// <summary>
/// 刷新文件合并信息
/// </summary>
/// <param name="chunk">文件分段信息</param>
/// <returns>文件分段信息</returns>
protected virtual ChunkInfo RefreshMergeInfo(ChunkInfo chunk)
{
if (!chunk.Chunks.HasValue || chunk.Chunks == 1)
{
return(chunk);
}
MergeInfo mergeInfo;
var key = string.Concat(chunk.AttachKey, chunk.UploadKey, chunk.FileID).GetHashCode().ToString() + chunk.FileID;
_rmutex.WaitOne();
try
{
if (!MergeInfo.TryGetValue(key, out mergeInfo))
{
MergeInfo[key] = mergeInfo = new MergeInfo {
Expires = DateTime.Now.AddHours(8), Merged = 1
}
}
;
else
{
mergeInfo.Merged++; mergeInfo.Expires = DateTime.Now.AddHours(8);
}
if (chunk.Chunks <= mergeInfo.Merged)
{
MergeInfo.Remove(key);
return(chunk);
}
return(null);
}
finally
{
_rmutex.ReleaseMutex();
}
}
/// <summary>
/// 合并文件
/// </summary>
/// <param name="chunk">需要合并的文件片段信息</param>
/// <returns>合并后的文件信息</returns>
public static FileInfo Merge(ChunkInfo chunk)
{
return(MergeProvider.Factory.Merge(chunk));
}
/// <summary>
/// 合并文件
/// </summary>
/// <param name="chunk">文件分段信息</param>
/// <returns>文件信息</returns>
internal virtual FileInfo Merge(ChunkInfo chunk)
{
return(RefreshMergeInfo(new MergeProvider(CreateUrl(chunk)).Merge(chunk)));
}
