void sendwidget::startTransfer()
{
localFile = new QFile(fileName);
if(!localFile->open(QFile::ReadOnly))
{
qDebug()<<"open file error";
ui->LB_showMsg->setText(tr("open file error"));
return;
}
totalBytes = localFile->size();
QDataStream sendOut(&outBlock, QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_5_7);
QString currentFileName = fileName.right(fileName.size()-fileName.lastIndexOf('/') - 1);
sendOut << qint64(0) << qint64(0) << currentFileName;
totalBytes += outBlock.size();
sendOut.device()->seek(0);
sendOut << totalBytes << qint64((outBlock.size() - sizeof(qint64)*2));
bytesToWrite = totalBytes - tcpClient->write(outBlock);
ui->LB_status->setText(tr("connected"));
outBlock.resize(0);
qDebug() << "start transfer file";
}
void ScreenCap::MergeSendMessage()
{
/************************************************************
* 数据流传送格式
*
* 宽度 ---| 8 | 8 | 8 | n |.....
* 含义 ---| 总长度 | 头长度(8) | 头内容 | 数据内容|.....
* 总长度 = |<----------------------------->|.....
* 总长度 = 8 + 8 + 8 + n
* 头内容 ： 0xFFFEFFFE;//值
* 头长度 ： 8
************************************************************/
TotalBytes = pCapThread->arrayNetSize.at(0); //数据大小
// qDebug() << "net size:" << TotalBytes;
QDataStream sendOut(&outBlock, QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_3);
qint64 headerFlag = 0xFFFEFFFE;//值
sendOut << qint64(0) << qint64(0) << headerFlag;
// qDebug() << "outBlock size:" << outBlock.size();
TotalBytes += outBlock.size();//总大小 = 数据 + 8字节(存在总大小字节数) + 8"头表达式"
// qDebug() << "TotalBytes size:" << TotalBytes;
sendOut.device()->seek(0);
// qDebug() << "header size:" << qint64((outBlock.size() - sizeof(qint64) * 2));
//填写实际的总长度和头长度
sendOut << TotalBytes << qint64((outBlock.size() - sizeof(qint64) * 2));
QString HeaderInfo = QString::fromLocal8Bit("\n-->>N:%1,T:%2%3\n").arg(picNametime).arg(QDate::currentDate().toString("yyyyMMdd")).arg(QTime::currentTime().toString("HHmmss"));
LogWriteFile(HeaderInfo);
QString TotalBytesInfo = QString::fromLocal8Bit("TotalBytes:%1\n").arg(TotalBytes);
LogWriteFile(TotalBytesInfo);
//将头发送出去，并计算剩余的数据长度，即数据内容长度(n)
qint64 len = writeNetData(outBlock, WRITE_HEAD);
if(len != outBlock.size())
{
qDebug() << "Header not same!!";
qDebug() << "to write Header len:" << outBlock.size();
qDebug() << "written Header len:" << len;
}
bytesToWrite = TotalBytes - len;
outBlock.resize(0);
// qDebug() << "-->TotalBytes size:" << TotalBytes;
// qDebug() << "-->bytesToWrite size:" << bytesToWrite;
outBlkData = pCapThread->arrayNetData.at(0);
writeNetData(outBlkData, WRITE_BODY);
qDebug() << "-->outBlkData size :" << outBlkData.size();
picNametime++;//发送次数
}
void DouyuTcpSocket::messageWrite(QString &content)
{
const char *content_ptr = content.toStdString().c_str();
QDataStream sendOut(&outBlock,QIODevice::WriteOnly);
qint32 length = 4 + 4 + content.length() + 1;// 2个uint32字段长度+内容长度+'\0'
sendOut<<qint32(hexReverse_qint32(length))<<qint32(hexReverse_qint32(length))<<qint32(_Douyu_CTS_Num);
outBlock.append(content_ptr);
outBlock.append('\0');
tcpDanmuSoc.write(outBlock);
outBlock.resize(0);
delete content_ptr;
}
void AaServerWindowApp::processData()
{
QByteArray array;
QString msg = ui->m_txtInput->toPlainText();
QDataStream sendOut(&array,QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_6);
sendOut<<qint64(0) << qint64(0) << AaServerWindowApp::Message << msg;
sendOut.device()->seek(0);
sendOut<<array.size() <<qint64(array.size() - sizeof(qint64)*2);
m_pServerSocket->write(array);
ui->m_txtInput->clear();
appendServerText(msg);
}
//发送数据由sndMsg()槽函数完成
void Server::sndMsg()
{
ui->sSendBtn->setEnabled(false);
clntConn = tSrv->nextPendingConnection();
connect(clntConn, SIGNAL(bytesWritten(qint64)), this, SLOT(updClntProgress(qint64)));
ui->sStatusLbl->setText(tr("开始传送文件%1!").arg(theFileName));
locFile = new QFile(fileName);
//首先以只读方式打开选中的文件
if(!locFile->open((QFile::ReadOnly)))
{
QMessageBox::warning(this, tr("应用程序"), tr("无法读取文件%1:\n%2").arg(fileName)
.arg(locFile->errorString()));
return ;
}
//通过QFile类的size()函数获取待发送文件的大小,并将该值暂存于totalBytes变量中
totalBytes = locFile->size();
//将发送缓存区outBlock封装在一个QDataStream变量中，这样做客方便地通过重载“<”
//操作符填写文件头结构
QDataStream sendOut(&outBlock, QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_7);
//启动计时，time是QTime对象，用来统计传输所用的时间
time.start();
//这里通过QString类的right()函数去掉文件的路径部分，仅将文件部分保存在curFile变量中
QString curFile = fileName.right(fileName.size()-fileName.lastIndexOf('/') - 1);
//构造一个临时的文件头，将该值追加到totalBytes字段，从而完成实际需发送字节数的记录
sendOut << qint64(0) << qint64(0) << curFile;
totalBytes += outBlock.size();
//将读写操作指向从头开始
sendOut.device()->seek(0);
//填写实际的总长度和文件长度
sendOut << totalBytes << qint64((outBlock.size()-sizeof(qint64)*2));
//将该文件头发出，同时修改待发送字节数bytesTobeWrite
bytesTobeWrite = totalBytes - clntConn->write(outBlock);
//清空发送缓存区以备下次使用
outBlock.resize(0);
}
void postoperation::startTransfer() //实现文件大小等信息的发送
{
QDir dir;
QString path = dir.currentPath();
path += "/database";
QDir dir2(path);
QString dbname;
if(dir2.exists())
{
dir2.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
dir2.setSorting(QDir::Size | QDir::Reversed);
QFileInfoList list = dir2.entryInfoList();
QFileInfo fileInfo = list.at(0);
dbname = fileInfo.fileName();
qDebug()<<dbname;
}
fileName = path + "/" +dbname;
qDebug()<<fileName;
localFile = new QFile(fileName);
if(!localFile->open(QFile::ReadOnly))
{
qDebug() << "open file error!";
return;
}
totalBytes = localFile->size();
//文件总大小
QDataStream sendOut(&outBlock,QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_7);
QString currentFileName = fileName.right(fileName.size() - fileName.lastIndexOf('/')-1);
sendOut << qint64(0) << qint64(0) << currentFileName;
//依次写入总大小信息空间，文件名大小信息空间，文件名---仅是文件名不含路径，没必要含路径
totalBytes += outBlock.size();
//这里的总大小是文件名大小等信息和实际文件大小的总和
sendOut.device()->seek(0);
sendOut<<totalBytes<<qint64((outBlock.size() - sizeof(qint64)*2));
//totalBytes是文件总大小，即两个quint64的大小+文件名+文件实际内容的大小
//qint64((outBlock.size() - sizeof(qint64)*2))得到的是文件名大小
bytesToWrite = totalBytes - tcpClient->write(outBlock);
//发送完头数据后剩余数据的大小，即文件实际内容的大小
qDebug()<<"已连接"<<endl;
outBlock.resize(0);
qDebug()<<"#####"<<totalBytes;
}
void Widget::startTransferMsg(){
if(msgSendReady){
// localFile = new QFile(fileName);
// if(!localFile->open(QFile::ReadOnly))
// {
// qDebug() << "open file error!";
// return;
// }
msg = this->msgLineEdit->text();
totalBytes = msg.size();
//文件总大小
QDataStream sendOut(&outBlock,QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_6);
//QString currentFileName = fileName.right(fileName.size() - fileName.lastIndexOf('/')-1);
//fileName.lastIndexOf('/')返回的是从首字符开始 到最后一个 / 的位数
//fileName.right(8) 意思就是 从路径右面开始 到第八位数的字符串
sendOut << qint64(0)<<qint8(0)<<qint64(0)<<msg;
//依次写入总大小信息空间，发送类型信息空间
totalBytes += outBlock.size();
//这里的总大小是消息大小消息+类型信息的总和
sendOut.device()->seek(0);
//回到字节流起始位置
msgtype = 2;
sendOut<<totalBytes<<msgtype<<qint64((outBlock.size() - sizeof(qint64)*2-sizeof(qint8)));
//totalBytes是文件总大小，即两个quint64的大小+文件名+文件实际内容的大小
//qint64((outBlock.size() - sizeof(qint64)*2))得到的是文件名大小
//为了保证在客户端能接收到完整的文件，我们都在数据流的最开始写入完整文件的大小信息，
//这样客户端就可以根据大小信息来判断是否接受到了完整的文件。而在服务器端，我们在发送数据时就要首先发送实际文件的大小信息，
//但是，文件的大小一开始是无法预知的，所以我们先使用了out<<(quint16) 0;在block的开始添加了一个quint16大小的空间，
//也就是两字节的空间，它用于后面放置文件的大小信息。然后out<<tr(“hello Tcp!!!”);输入实际的文件，这里是字符串。
//当文件输入完成后我们在使用out.device()->seek(0);返回到block的开始，加入实际的文件大小信息，也就是后面的代码，
//它是实际文件的大小：out<<(quint16) (block.size() – sizeof(quint16));
tcpClient->write(outBlock);
//发送完头数据后剩余数据的大小，即文件实际内容的大小
// this->stateLabel->setText(QString::fromLocal8Bit("已连接"));
outBlock.resize(0);
qDebug()<<"#####totalBytes"<<totalBytes;
this->stateLabel->setText(this->msgLineEdit->text()+" is Send");
tcpClient->close();
}
}
void AaServerWindowApp::slotSendFile()
{
m_fileNameSend = QFileDialog::getOpenFileName(this);
if(!m_fileNameSend.isEmpty()){
localFile = new QFile(m_fileNameSend);
if (!localFile->open(QFile::ReadOnly)){
qDebug()<<__PRETTY_FUNCTION__<<"Error";
return;
}
totalBytesSend = localFile->size();
QDataStream sendOut(&outBlock,QIODevice::WriteOnly);
sendOut.setVersion(QDataStream::Qt_4_6);
QString currentFileName = m_fileNameSend.right(m_fileNameSend.size()
-m_fileNameSend.lastIndexOf("/") -1);
sendOut << qint64(0) <<qint64(0) <<AaServerWindowApp::File << currentFileName;
totalBytesSend += outBlock.size();
sendOut.device()->seek(0);
sendOut << totalBytesSend << qint64(outBlock.size() - sizeof(qint64)*2);
bytesToWriteSend = totalBytesSend - m_pServerSocket->write(outBlock);
outBlock.resize(0);
}
}