基于QT制作一个简易的传输文件小工具
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2022-03-03 10:48:17
最近因为一个事情很恼火,因为办公需要用到企业微信,但是企业微信只能在一个电脑上登陆,所以当别人发文件给你的时候,你只能一个电脑接收,创建共享文件夹也很麻烦,每次都需要去访问,很麻烦。所以准备自己写一个...
最近因为一个事情很恼火,因为办公需要用到企业微信,但是企业微信只能在一个电脑上登陆,所以当别人发文件给你的时候,你只能一个电脑接收,创建共享文件夹也很麻烦,每次都需要去访问,很麻烦。所以准备自己写一个文件传输小工具。
功能就是能实现文件的双向传输,即客户端能传给服务端,服务端可以传给客户端。
使用的tcp通信,其实就是发消息,但是组合数据我是借鉴了it1995大神写的代码。
先看下效果图
可以看到既可以接受文件也可进行发送文件,只要2台电脑在统一局域网内,就可发送和接受数据。
本地文件下出现了一份传输的文件。
直接看代码
.h
#ifndef widget_h #define widget_h #include <qwidget> #include <qpushbutton> #include <qlineedit> #include <qtcpsocket> #include <qtcpserver> #include <qfile> #include <qtextedit> #include <qprogressbar> class widget : public qwidget { q_object public: widget(qwidget *parent = nullptr); ~widget(); void init(); private slots: void ontcpconnected(); void onconnectclicked(); void servernewconnect(); void socketreaddata(); void onopenfileclicked(); void onsendclicked(); void updateclientprogress(qint64 numbytes); private: qpushbutton *m_pconnectbtn=nullptr; qlineedit *m_pipaddressedit=nullptr; qlineedit *m_pportedit=nullptr; qwidget *m_ptitlewgt=nullptr; qlineedit *m_pfilepathedit=nullptr; qpushbutton *m_popenfilebtn=nullptr; qpushbutton *m_psendbtn=nullptr; qtextedit *m_ptextedit=nullptr; qprogressbar *m_preceiverbar=nullptr; qprogressbar *m_psendbar=nullptr; qtcpsocket *m_ptcpsocket=nullptr; qtcpserver *m_ptcpserver=nullptr; qtcpsocket *m_ptcpserversocket=nullptr; //------receiver qint64 m_bytesreceived; qint64 m_filenamesize; qint64 m_totalbytes; qstring m_filename; qfile *m_localfile; qbytearray m_inblock; //send qfile *m_clientlocalfile; qstring m_clientfilename; qint64 m_clienttotalbytes; qint64 m_clientbyteswritten=0; qint64 m_clientbytestowrite; qint64 m_clinetpayloadsize; qbytearray m_clientoutblock; }; #endif // widget_h
.cpp
#include "widget.h" #include <qhboxlayout> #include <qlabel> #include <qvalidator> #include <qmessagebox> #include <qfiledialog> widget::widget(qwidget *parent) : qwidget(parent) { this->resize(800,600); init(); m_ptcpsocket=new qtcpsocket(this); connect(m_ptcpsocket,&qtcpsocket::connected,this,&widget::ontcpconnected); //若连接成功,则触发此信号 connect(m_ptcpsocket,signal(byteswritten(qint64)),this,slot(updateclientprogress(qint64))); //发送数据 m_ptcpserver=new qtcpserver(this); m_totalbytes=0; m_bytesreceived=0; m_filenamesize=0; connect(m_ptcpserver,&qtcpserver::newconnection,this,&widget::servernewconnect); if(!m_ptcpserver->listen(qhostaddress::any, 2021)) //端口为2021 { qmessagebox::warning(this,"warning",m_ptcpserver->errorstring(),qmessagebox::ok); return; } } widget::~widget() { } void widget::init() { m_pconnectbtn=new qpushbutton(tr("connect"),this); m_pipaddressedit=new qlineedit(this); m_pportedit=new qlineedit(this); m_pportedit->setvalidator(new qintvalidator()); m_ptitlewgt=new qwidget(this); m_pipaddressedit->setfixedwidth(200); m_pportedit->setfixedwidth(200); m_pconnectbtn->setfixedsize(100,25); qlabel *iplabel=new qlabel(tr("ipaddress:"),this); qlabel *portlabel=new qlabel(tr("port:"),this); iplabel->setfixedwidth(60); portlabel->setfixedwidth(40); qhboxlayout *titlelayout=new qhboxlayout(this); titlelayout->addwidget(iplabel); titlelayout->addwidget(m_pipaddressedit); titlelayout->addwidget(portlabel); titlelayout->addwidget(m_pportedit); titlelayout->addwidget(m_pconnectbtn); titlelayout->setmargin(5); titlelayout->setspacing(10); titlelayout->addstretch(); m_ptitlewgt->setfixedheight(40); m_ptitlewgt->setlayout(titlelayout); m_pipaddressedit->settext("192.168.2.110"); m_pportedit->settext("2021"); m_pportedit->setenabled(false); m_pfilepathedit=new qlineedit(this); m_popenfilebtn=new qpushbutton(tr("open file"),this); m_psendbtn=new qpushbutton(tr("send")); m_pfilepathedit->setfixedwidth(500); m_popenfilebtn->setfixedsize(100,25); m_psendbtn->setfixedsize(100,25); m_psendbtn->setenabled(false); qwidget *bottomwgt=new qwidget(this); qhboxlayout *bottomlayout=new qhboxlayout(this); bottomlayout->addwidget(m_pfilepathedit); bottomlayout->addwidget(m_popenfilebtn); bottomlayout->addwidget(m_psendbtn); bottomlayout->setmargin(5); bottomlayout->setspacing(5); bottomlayout->addstretch(); bottomwgt->setlayout(bottomlayout); m_ptextedit=new qtextedit(this); qlabel *receiverlabel=new qlabel(tr("receiver speed"),this); qlabel *sendlabel=new qlabel(tr("send speed"),this); receiverlabel->setfixedwidth(100); sendlabel->setfixedwidth(100); m_preceiverbar=new qprogressbar(this); m_psendbar=new qprogressbar(this); m_preceiverbar->setfixedsize(300,30); m_psendbar->setfixedsize(300,30); m_preceiverbar->setorientation(qt::horizontal); m_psendbar->setorientation(qt::horizontal); qwidget *receiverbarwgt=new qwidget(this); qhboxlayout *receiverbarlayout=new qhboxlayout(this); receiverbarlayout->addwidget(receiverlabel); receiverbarlayout->addwidget(m_preceiverbar); receiverbarlayout->addstretch(); receiverbarlayout->setspacing(5); receiverbarwgt->setlayout(receiverbarlayout); qwidget *sendbarwgt=new qwidget(this); qhboxlayout *sendbarlayout=new qhboxlayout(this); sendbarlayout->addwidget(sendlabel); sendbarlayout->addwidget(m_psendbar); sendbarlayout->addstretch(); sendbarlayout->setspacing(5); sendbarwgt->setlayout(sendbarlayout); connect(m_pconnectbtn,&qpushbutton::clicked,this,&widget::onconnectclicked); connect(m_popenfilebtn,&qpushbutton::clicked,this,&widget::onopenfileclicked); connect(m_psendbtn,&qpushbutton::clicked,this,&widget::onsendclicked); qvboxlayout *mainlayout=new qvboxlayout(this); mainlayout->addwidget(m_ptitlewgt); mainlayout->addwidget(bottomwgt); mainlayout->addwidget(receiverbarwgt); mainlayout->addwidget(sendbarwgt); mainlayout->addwidget(m_ptextedit); mainlayout->setmargin(0); mainlayout->addstretch(); this->setlayout(mainlayout); } void widget::ontcpconnected() { m_ptextedit->append("connect server success!"); } void widget::onconnectclicked() { qstring strip=m_pipaddressedit->text(); qstring strport=m_pportedit->text(); if(strip!=""&&strport!="") { m_ptcpsocket->connecttohost(strip,strport.toint()); //请求连接 } else { qmessagebox::warning(this,"warning","ipaddress or port is null",qmessagebox::ok); } } void widget::servernewconnect() { m_ptcpserversocket = m_ptcpserver->nextpendingconnection(); //服务端接受消息 qobject::connect(m_ptcpserversocket, &qtcpsocket::readyread, this, &widget::socketreaddata); m_ptextedit->append("connect client success"); } void widget::socketreaddata() { qdatastream in(m_ptcpserversocket); in.setversion(qdatastream::qt_5_11); if (m_bytesreceived<=sizeof(qint64)*2){ if((m_ptcpserversocket->bytesavailable()>=sizeof(qint64)*2)&&(m_filenamesize==0)){ in>>m_totalbytes>>m_filenamesize; m_bytesreceived +=sizeof(qint64)*2; } if((m_ptcpserversocket->bytesavailable()>=m_filenamesize)&&(m_filenamesize!=0)){ in>>m_filename; m_bytesreceived+=m_filenamesize; m_localfile = new qfile(m_filename); if (!m_localfile->open(qfile::writeonly)){ qdebug() << "server: open file error!"; return; } } else{ return; } } if(m_bytesreceived<m_totalbytes) { m_bytesreceived+=m_ptcpserversocket->bytesavailable(); m_inblock = m_ptcpserversocket->readall(); m_localfile->write(m_inblock); m_inblock.resize(0); } m_preceiverbar->setmaximum(m_totalbytes); m_preceiverbar->setvalue(m_bytesreceived); if (m_bytesreceived==m_totalbytes){ m_localfile->close(); qstring strsuccess=qstring("file %1 receiversucess").arg(m_filename); m_ptextedit->append(strsuccess); m_ptcpserversocket->close(); m_totalbytes=0; m_bytesreceived=0; m_filenamesize=0; } } void widget::onopenfileclicked() { qstring filename = qfiledialog::getopenfilename(this, tr("open file"), "/home", tr("file (*.*)")); if(filename!="") { m_clientfilename=filename; m_psendbtn->setenabled(true); m_pfilepathedit->settext(filename); } } void widget::onsendclicked() { m_clientoutblock.clear(); m_clientlocalfile=new qfile(m_clientfilename); if(!m_clientlocalfile->open(qfile::readonly)){ qdebug()<<"client:open file error!"; return; } m_clienttotalbytes=m_clientlocalfile->size(); qdatastream sendout(&m_clientoutblock,qiodevice::writeonly); sendout.setversion(qdatastream::qt_5_11); qstring currentfilename=m_clientfilename.right(m_clientfilename.size()-m_clientfilename.lastindexof('/')-1); sendout<<qint64(0)<<qint64(0)<<currentfilename; m_clienttotalbytes+=m_clientoutblock.size(); sendout.device()->seek(0); sendout<<m_clienttotalbytes<<qint64(m_clientoutblock.size()-sizeof(qint64)*2); m_clientbytestowrite=m_clienttotalbytes-m_ptcpsocket->write(m_clientoutblock); m_clientoutblock.resize(0); } void widget::updateclientprogress(qint64 numbytes) { m_clientbyteswritten+=(int)numbytes; if(m_clientbytestowrite>0){ m_clientoutblock=m_clientlocalfile->read(qmin(m_clientbytestowrite,m_clinetpayloadsize)); m_clientbytestowrite-=(int)m_ptcpsocket->write(m_clientoutblock); m_clientoutblock.resize(0); } else{ m_clientlocalfile->close(); } m_psendbar->setmaximum(m_clienttotalbytes); m_psendbar->setvalue(m_clientbyteswritten); if(m_clientbyteswritten==m_clienttotalbytes){ qstring sendsuccess=qstring("send file %1 success").arg(m_filename); m_ptextedit->append(sendsuccess); m_clientlocalfile->close(); m_ptcpsocket->close(); m_clientbyteswritten=0; } }
这个小工具我会一直用的
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