QT-应用(5)-TCPClient-传送文件（文本-视频）

ubuntu 和windows下都可以运行的 demo
功能：1.连接服务器端
           2.传送文件：文本或者视频
关键代码如下：
 

//QFile 小文件，一次性操作
void mytcpclientfile::on_uploadfile_btn_clicked()
{
    QString msg;
    QFile *pf;
    pf=new QFile();
    //1.选取上传文件 全路径：filename  QFileDialog
    QString filename=QFileDialog::getOpenFileName(this,"uploadfiles",
                                                  "D:\\QTPrj\\mytcpclientfile\\upfiles\\","(*.*)");
    if(filename.isEmpty())
    {
        return;
    }
   msg=QString("1.选取上传文件 全路径：filename:%1").arg(filename);
   ui->msg_textedit->append(msg);
   
   pf->setFileName(filename);
   bool ret=pf->open(QIODevice::ReadOnly|QIODevice::Unbuffered);
   if(!ret)
   {
       return;
   } 
   ui->uploadfiles_progressBar->setValue(0);
   this->totalsize_=0;
   this->sendsize_=0;
   this->totalsize_=pf->size();
   ui->uploadfiles_progressBar->setRange(0,this->totalsize_);
   msg=QString("2.：发送的文件 filename:%1 ok 文件大小为:%2").arg(filename).arg(totalsize_);
   ui->msg_textedit->append(msg);
   //3.发送头给服务器 eg:filename#totalsize#
   QFileInfo info(filename);
   QString sendcontent=QString("%1#%2#")
                              .arg(info.fileName())
                              .arg(this->totalsize_);
   ptcpsocket_->write(sendcontent.toUtf8());
   ptcpsocket_->waitForBytesWritten();

   msg=QString("3.socket发送给服务器 eg:filename#totalsize# :%1").arg(sendcontent);
   ui->msg_textedit->append(msg);
   qint64 len;
   while(!pf->atEnd())
   {
       QByteArray ba=pf->read(MSG_LEN);
       len=ptcpsocket_->write(ba);
       this->sendsize_+=len;
       ui->uploadfiles_progressBar->setValue(this->sendsize_);
       ptcpsocket_->waitForBytesWritten();
   }   
   pf->close();

   //5.返回信息
   if(this->totalsize_==this->sendsize_)
   {
       msg=QString("上传文件成功!");
   }
   else
   {
       msg=QString("上传文件失败! totalsize:%1 sendsize:%2")
                  .arg(this->totalsize_).arg(this->sendsize_);
   }
   
   ui->msg_textedit->append(msg);
   

}