public FileManager()
{
var superBlock = new SuperBlock(1, Directory.GetCurrentDirectory() + "/dir");
var hash = Encoding.UTF8.GetBytes("testtesttesttesttest");
BlockIndex index = new BlockIndex(0, Encoding.UTF8.GetBytes("test"), hash, 3, 2, 1);
var index2 = new BlockIndex(index.ToHeaderBytes());
Block block = new Block(index.ToHeaderBytes(), "app", 4);
Block block2 = new Block(new MemoryStream(block.ToBytes(hash)));
this.superBlocks.Add(1, superBlock);
}
public void AddFile(string dir, string fileName, Stream stream)
{
var path = string.Join("/", dir.Split('\\', '/').Skip(1).ToArray());
//得到文件的数据
byte[] dataBytes = GetCompressedData(stream);
//得到文件的名称
var filePath = Encoding.UTF8.GetBytes(path + "/" + fileName);
//得到文件的哈希
var hash = sha(dataBytes);
//判断文件内容是否已经存在
if (fileDataIndex.ContainsKey(hash))
{
//判断文件名称是否已经存在
if (!fileNameIndex.ContainsKey(filePath))
{
fileNameIndex.Add(filePath, fileDataIndex[hash]);
}
else
{
fileNameIndex[filePath] = fileDataIndex[hash];
}
return;
}
var blockIndex = new BlockIndex((uint)(dataFileWriter.Position / 8), filePath, hash);
this.fileBlocks.Add(blockIndex);
var fileIndex = this.fileBlocks.Count - 1;
fileDataIndex.Add(hash, fileIndex);
//判断文件名称是否已经存在
if (!fileNameIndex.ContainsKey(filePath))
{
fileNameIndex.Add(filePath, fileDataIndex[hash]);
}
else
{
fileNameIndex[filePath] = fileDataIndex[hash];
}
Block block = new Block(blockIndex.ToHeaderBytes(), "", 0);
dataBytes = block.ToBytes(dataBytes);
dataFileWriter.Write(dataBytes, 0, dataBytes.Length);
dataFileWriter.Flush();
}
public SuperBlock(uint volumeId, string root)
{
this.VolumeId = volumeId;
this.dataFile = Path.Combine(root, this.VolumeId + ".data");
this.indexFile = Path.Combine(root, this.VolumeId + ".index");
this.dataFileWriter = File.Open(this.dataFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
using (var indexFileReader = File.Open(this.indexFile, FileMode.OpenOrCreate, FileAccess.Read))
{
byte[] buffer = new byte[4];
indexFileReader.Read(buffer, 0, 4);
int size = BitConverter.ToInt32(buffer, 0);
while (size > 0)
{
buffer = new byte[size];
indexFileReader.Read(buffer, 0, size);
var block = new BlockIndex(buffer);
//判断文件内容是否已经存在
if (fileDataIndex.ContainsKey(block.Hash))
{
//判断文件名称是否已经存在
if (!fileNameIndex.ContainsKey(block.FileName))
{
fileNameIndex.Add(block.FileName, fileDataIndex[block.Hash]);
}
else
{
fileNameIndex[block.FileName] = fileDataIndex[block.Hash];
}
continue;
}
this.fileBlocks.Add(block);
var fileIndex = this.fileBlocks.Count - 1;
fileDataIndex.Add(block.Hash, fileIndex);
fileNameIndex.Add(block.FileName, fileIndex);
//read next one
buffer = new byte[4];
indexFileReader.Read(buffer, 0, 4);
size = BitConverter.ToInt32(buffer, 0);
}
}
}
