/// <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, StateBase 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 = EncryptionDecryptFile.FileHeadEncryption(fileState);
return(haveByte);
}
/// <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);
}
