/// <summary>
/// 发送方的文件进行续传;如果回复是null;说明不存在
/// </summary>
/// <param name="fileLable">文件标签</param>
/// <param name="stateOne">StateBase</param>
/// <returns>byte[]</returns>
internal byte[] FileContinue(int fileLable, TransmitData stateOne)
{
byte[] haveDate = null;
FileState state = FileLabelToState(fileLable);
if (state != null && state.StateFile == 2)
{
haveDate = EncDecFile.FileSevenEncryption(CipherCode._sendUser, CipherCode._fileContinue, fileLable);
state.StateOne = stateOne;//可以续传；用新的stateOne代替旧的
}
return(haveDate);
}
/// <summary>
/// 得到文件的进度；返回大于0小于100的进度数；如果文件已不存在返回100；不抛异常
/// </summary>
/// <param name="FileLabel">文件标签</param>
/// <returns></returns>
public int FileProgress(int FileLabel)
{
FileState state = FileLabelToState(FileLabel);
if (state == null)
{
return(100);
}
long haveLong = state.FileOkLenth * 100 / state.FileLenth;
int haveInt = (int)haveLong;
return(haveInt);
}
/// <summary>
/// 暂停发送;文件不存在或在等待状态会抛出异常；
/// </summary>
/// <param name="FileLabel">文件标签</param>
public void FileStop(int FileLabel)
{
FileState state = FileLabelToState(FileLabel);
if (state == null)
{
throw new Exception("这文件已不存在");
}
if (state.StateFile == 2)
{
throw new Exception("这个文件已处于暂停状态");
}
if (state.StateFile == 0)
{
throw new Exception("这个文件处于等待状态;不能暂停");
}
state.StateFile = 2;
}
/// <summary>
/// 发送文件
/// </summary>
/// <param name="fileLable">文件标签</param>
/// <param name="fileName">文件地址</param>
/// <param name="stateOne">StateBase</param>
/// <returns>形成之后的数据</returns>
internal byte[] Send(ref int fileLable, string fileName, TransmitData stateOne)
{
int fileLenth = 0;
FileStream fs;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
fileLenth = (int)fs.Length;
}
catch (Exception Ex) { throw new Exception(Ex.Message); }
fileLable = RandomPublic.RandomNumber(16787);
FileState fileState = new FileState(fileLable, fileLenth, fileName, fs);
fileState.StateOne = stateOne;
FS.Add(fileState);
byte[] haveByte = EncDecFile.FileHeadEncryption(fileState);
return(haveByte);
}
/// <summary>
/// 取消发送;文件不存在会抛出异常
/// </summary>
/// <param name="FileLabel">文件标签</param>
public void FileCancel(int FileLabel)
{
try
{
int offset = FS.FindIndex(delegate(FileState state1) { return(state1.FileLabel == FileLabel); });
FileState state2 = FS[offset];
if (state2.Filestream != null)
{
state2.Filestream.Close();//移除一个文件之后把所有的一切都处理掉
}
FS.RemoveAt(offset);
try { int offset1 = FS.FindIndex(delegate(FileState state1) { return(state1.StateOne == state2.StateOne); }); }
catch
{
if (state2.StateOne.Buffer.Length != state2.StateOne.BufferSize)
{
state2.StateOne.BufferBackup = state2.StateOne.Buffer; state2.StateOne.Buffer = new byte[state2.StateOne.BufferSize];
}
}
}
catch
{ throw new Exception("文件已不存在"); }
}
/// <summary>
/// 发送方发过来的数据；
/// </summary>
/// <param name="receiveToDate">收到的数据</param>
/// <param name="stateOne">StateBase</param>
/// <returns>需要回复的数据</returns>
internal byte[] ReceiveDateTO(byte[] receiveToDate, TransmitData stateOne)
{
byte[] haveDate = null;
int fileLabel = ByteToDate.ByteToInt(3, receiveToDate);
byte code = receiveToDate[2];
if (code == CipherCode._fileHeadCode)//说明发送过来的是文件是否传输的包头信息
{
FileStream fs = null;
FileState stateHead = EncDecFile.FileHeadDecrypt(receiveToDate, fs);
string fileName = ReceiveMust.ReceiveOrNo(stateHead.FileLabel, stateHead.FileName, stateHead.FileLenth);
if (fileName == "")
{
haveDate = EncDecFile.FileSevenEncryption(CipherCode._receiveUser, CipherCode._fileRefuse, fileLabel);
}
else
{
fs = CommonMethod.FileStreamWrite(fileName);
if (fs == null)
{
haveDate = EncDecFile.FileSevenEncryption(CipherCode._receiveUser, CipherCode._fileRefuse, fileLabel);
}
else
{
ExpandBuffer(stateHead, stateOne);
stateHead.FileName = fileName; stateHead.Filestream = fs; stateHead.StateFile = 1;
FS.Add(stateHead);
haveDate = EncDecFile.FileSevenEncryption(CipherCode._receiveUser, CipherCode._fileOk, fileLabel);
}
}
return(haveDate);
}
FileState state = FileLabelToState(fileLabel);
if (state == null)
{
if (code == CipherCode._fileCancel)
{
return(null);
}
else
{
return(EncDecFile.FileSevenEncryption(CipherCode._receiveUser, CipherCode._fileCancel, fileLabel));
}
}
else
{
switch (code)
{
case CipherCode._fileSubjectCode: //收到的是文件主体代码
haveDate = EncDecFile.FileSubjectDecrypt(state, receiveToDate);
ReceiveMust.FileProgress(state); //输出文件进度
if (state.FileOkLenth >= state.FileLenth) //说明文件接收完成了
{
FileRemove(fileLabel); ReceiveMust.ReceiveSuccess(fileLabel);
}
break;
case CipherCode._fileCancel: //对方已经取消了这个文件；
FileRemove(fileLabel);
ReceiveMust.FileCancel(fileLabel);
break;
case CipherCode._sendStop: //对方暂停发送
FileStopIn(state, ReceiveMust);
break;
case CipherCode._fileContinue: //对方发过来一个续传的确认信息;你是否同意；
ExpandBuffer(state, stateOne); //有可能是stateOne换过了；
FileStopIn(state, ReceiveMust); //对方已经暂停了这个文件；我这边肯定也要先暂停掉
bool orStop = ReceiveMust.FileOrNotContingue(fileLabel); //让客户确认；是否续传
if (orStop)
{
haveDate = EncDecFile.ReceiveContingueEncryption(CipherCode._fileContinueOk, state);
state.StateFile = 1;
ReceiveMust.FileContinue(fileLabel);
}
else
{
haveDate = EncDecFile.FileSevenEncryption(CipherCode._receiveUser, CipherCode._fileContinueNo, fileLabel);
}
break;
case CipherCode._fileContinueOk: //对方同意续传
state.StateFile = 1;
ReceiveMust.FileContinue(fileLabel);
haveDate = EncDecFile.FileSubjectDecrypt(state, receiveToDate);
if (state.FileOkLenth >= state.FileLenth) //说明文件接收完成了
{
FileRemove(fileLabel); ReceiveMust.ReceiveSuccess(fileLabel);
}
break;
case CipherCode._fileContinueNo: //对方拒绝续传
ReceiveMust.FileNoContinue(fileLabel);
FileStopIn(state, ReceiveMust);
break;
}
}
return(haveDate);
}
/// <summary>
/// 接收方发过来的数据；
/// </summary>
/// <param name="receiveToDate">收到的数据</param>
/// <param name="stateOne">StateBase</param>
/// <returns>回复的数据</returns>
internal byte[] ReceiveDateTO(byte[] receiveToDate, TransmitData stateOne)
{
byte[] haveDate = null;
int fileLabel = ByteToDate.ByteToInt(3, receiveToDate);
byte code = receiveToDate[2];
FileState state = FileLabelToState(fileLabel);
if (state == null)
{
if (code == CipherCode._fileCancel)
{
return(null);
}
else
{
return(EncDecFile.FileSevenEncryption(CipherCode._sendUser, CipherCode._fileCancel, fileLabel));
}
}
else
{
switch (code)
{
case CipherCode._fileOk: //对方同意接收文件
Thread.Sleep(500);
state.StateFile = 1;
haveDate = EncDecFile.FileSubjectEncryption(state, stateOne.BufferSize);
SendMust.FileStartOn(fileLabel); //第一次发送用原来尺寸
break;
case CipherCode._fileRefuse: //对方拒绝接收文件
FileRemove(fileLabel);
SendMust.FileRefuse(fileLabel);
break;
case CipherCode._dateSuccess: //主体部分数据发送成功；准备发送下一批
haveDate = EncDecFile.FileSubjectEncryption(state, BufferSize);
SendMust.FileProgress(state);
if (haveDate == null) //说明这个文件已经发送成功了
{
FileRemove(fileLabel); SendMust.SendSuccess(fileLabel);
}
break;
case CipherCode._fileCancel: //对方已经取消了这个文件；
FileRemove(fileLabel);
SendMust.FileCancel(fileLabel);
break;
case CipherCode._sendStop: //对方暂停发送
FileStopIn(state, SendMust);
break;
case CipherCode._fileContinue: //对方发过来一个续传的确认信息;你是否同意；
state.StateOne = stateOne; //有可能stateOne会有变化
FileStopIn(state, SendMust); //对方已经暂停了这个文件；我这边肯定也要先暂停掉
bool orStop = SendMust.FileOrNotContingue(fileLabel); //让客户确认；是否续传
if (orStop)
{
state.StateFile = 1;
state.FileOkLenth = ByteToDate.ByteToLong(7, receiveToDate);
state.Filestream.Position = state.FileOkLenth; //设置流的当前读位置
haveDate = EncDecFile.FileSubjectEncryption(state, stateOne.BufferSize);
if (haveDate != null)
{
haveDate[2] = CipherCode._fileContinueOk;
SendMust.FileContinue(fileLabel);
}
}
else
{
haveDate = EncDecFile.FileSevenEncryption(CipherCode._sendUser, CipherCode._fileContinueNo, fileLabel);
}
break;
case CipherCode._fileContinueOk: //对方同意续传
state.FileOkLenth = ByteToDate.ByteToLong(7, receiveToDate);
state.StateFile = 1;
state.Filestream.Position = state.FileOkLenth; //设置流的当前读位置
haveDate = EncDecFile.FileSubjectEncryption(state, stateOne.BufferSize);
SendMust.FileContinue(fileLabel);
break;
case CipherCode._fileContinueNo: //对方拒绝续传
SendMust.FileNoContinue(fileLabel);
FileStopIn(state, SendMust);
break;
}
}
return(haveDate);
}
