problem in transfer file with tcpip part 2

[wei243]

i have try all the methods provided, but cannot function properly.
the problem i hv face:
1. the clientConnection->disconnect() signal wont emit unless i run the clientConnection->disconnectFromHost(). bcoz i dont know when the clientConnection has finished reading data from sender. so i cant get the correct timming to run clientConnection->disconnectFromHost().

2. the tcpserver->newConnection() signal will emit again even the last connection data is being reading.

3. i try readyRead(), but it wont emit at all.....

how to know when the clientConnection(in server) is finished reading the data from sender?give me some example pls.

maybe i m stupid.....

[wysota]

A quick, dirty and untested implementation:

class FileSender : public QTcpSocket {
  Q_OBJECT
public:
  FileSender(QObject *parent) : QTcpSocket(parent){
    _ready = false;
    connect(this, SIGNAL(connected()), SLOT(onConnected()));
    connect(this, SIGNAL(disconnected()), SLOT(onDisconnected()));
    connect(this, SIGNAL(bytesWritten(qint64)), SLOT(onWritten(qint64)));
  }
  bool sendFile(QIODevice *file){
    if(!_ready) return false;
    _ready = false;
    device = file;
    sendChunk();
  }
signals:
  void fileTransfered();
  void ready();
private slots:
  void onConnected(){
    _ready = true;
    emit ready();
  }
  void onWritten(qint64 s){
    if(device->atEnd()){
      // file sent
      _ready = true;
      emit fileTransfered();
      emit ready();
    } else sendChunk();
  }
  void onDisconnected(){
    _ready = false;
  }
private:
  QIODevice *device;
  bool _ready;
  void sendChunk(){
    QByteArray ba = device->read(64000); // about 64kB
    qint64 writ = write(ba); // write data to socket
    if(writ<ba.size()){ // not all written
        for(int i=writ;i<ba.size(); i++) device->ungetChar(ba[i]); // write back to the file buffer
    }
  }
};
 
 
FileSender *fs = new FileSender(this);
connect(fs, SIGNAL(ready()), this, SLOT(send()));
connect(fs, SIGNAL(fileTransfered()), this, SLOT(finish()));
fs->connectToHost("...", 3456);
 
//...
// slot send():
QFile *file = new QFile("...");
file->open(QFile::ReadOnly);
disconnect(fs, SIGNAL(ready()), this, SLOT(send()));
fs->sendFile(file);
//...
// slot finish():
file->close();
delete file;
connect(fs, SIGNAL(disconnected()), fs, SLOT(deleteLater())); // so that fs deletes itself
fs->disconnectFromHost();

class FileSender : public QTcpSocket {
  Q_OBJECT
public:
  FileSender(QObject *parent) : QTcpSocket(parent){
    _ready = false;
    connect(this, SIGNAL(connected()), SLOT(onConnected()));
    connect(this, SIGNAL(disconnected()), SLOT(onDisconnected()));
    connect(this, SIGNAL(bytesWritten(qint64)), SLOT(onWritten(qint64)));
  }
  bool sendFile(QIODevice *file){
    if(!_ready) return false;
    _ready = false;
    device = file;
    sendChunk();
  }
signals:
  void fileTransfered();
  void ready();
private slots:
  void onConnected(){
    _ready = true;
    emit ready();
  }
  void onWritten(qint64 s){
    if(device->atEnd()){
      // file sent
      _ready = true;
      emit fileTransfered();
      emit ready();
    } else sendChunk();
  }
  void onDisconnected(){
    _ready = false;
  }
private:
  QIODevice *device;
  bool _ready;
  void sendChunk(){
    QByteArray ba = device->read(64000); // about 64kB
    qint64 writ = write(ba); // write data to socket
    if(writ<ba.size()){ // not all written
        for(int i=writ;i<ba.size(); i++) device->ungetChar(ba[i]); // write back to the file buffer
    }
  }
};


FileSender *fs = new FileSender(this);
connect(fs, SIGNAL(ready()), this, SLOT(send()));
connect(fs, SIGNAL(fileTransfered()), this, SLOT(finish()));
fs->connectToHost("...", 3456);

//...
// slot send():
QFile *file = new QFile("...");
file->open(QFile::ReadOnly);
disconnect(fs, SIGNAL(ready()), this, SLOT(send()));
fs->sendFile(file);
//...
// slot finish():
file->close();
delete file;
connect(fs, SIGNAL(disconnected()), fs, SLOT(deleteLater())); // so that fs deletes itself
fs->disconnectFromHost();

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