利用QWebsocket-进行数据的上传和下载。

QWebsocket 的特性之一就是建立连接之后，就稳定不断，可以随时的进行数据的上传和下载，Qt封装的QWebSocket我目前利用来进行小量数据的发送和接收感觉还是挺快的。没有遇到什么问题。

本来想利用QDataStream来对二进制文件进行读写的，没想到直接传QbyteArray就行了，利用QFile就可以把文件的读写利用 QbyteArray搞定了。write(QbyteArray) readAll(QbyteArray)

QDataStream还存在一个隐藏的bug,如果不小心难免浪费个半个小时去寻找，。

使用如下QDataStream方式输出二进制文件，文件头部多四个字节，代表文件大小，不管怎么都去不了；
//写二进制文件
QFile file("F:/1.rgb");
if(!file.open(QIODevice::WriteOnly))
{
QMessageBox::critical(this,"Warning", "Can't open file for writing",QMessageBox::Ok);
return;
}
QDataStream out(&file);
out.setVersion(QDataStream::Qt_4_0);
out << data;
file.close();

最终舍弃，使用write方式写入二进制文件，输出正常
//写二进制文件
QFile file("F:/1.rgb");
if(!file.open(QIODevice::WriteOnly))
{
QMessageBox::critical(this,"Warning", "Can't open file for writing",QMessageBox::Ok);
return;
}
file.write(data);
file.close();

接下来上QWebSocket的 Client:

#include "dialog.h"
	#include<QUrl>
	#include<QFile>
	#include<QDataStream>
	Dialog::Dialog(QWidget *parent)
	: QDialog(parent)
	{
	m_client=new QWebSocket();//"test", QWebSocketProtocol::NonSecureMode,this

	m_label=new QLabel(QStringLiteral("ready to push"),this);
	m_button=new QPushButton(QStringLiteral("Push"),this);
	m_filePathEdit=new QTextEdit(QStringLiteral("input file path"),this);
	QHBoxLayout *hlay=new QHBoxLayout();
	QVBoxLayout *vlay=new QVBoxLayout();
	QHBoxLayout *hlay2=new QHBoxLayout();
	hlay->addWidget(m_button);
	hlay->addWidget(m_label,5);

	hlay2->addWidget(m_filePathEdit);

	vlay->addLayout(hlay,1);
	vlay->addLayout(hlay2);
	this->setLayout(vlay);
	this->setMinimumSize(500,800);
	connect(m_client,SIGNAL(connected()),this,SLOT(onConnected()));
	connect(m_button,SIGNAL(clicked()),this,SLOT(onPush()));
	}

	Dialog::~Dialog()
	{

	}

	void Dialog::connectToServer()
	{

	QString ipAndPort="ws://10.10.2.30:12345";
	QUrl url(ipAndPort);
	m_client->open(url);
	}

	void Dialog::onConnected()
	{
	qDebug()<<"onConnected"<<endl;
	}

	void Dialog::onPush()
	{
	//QByteArray txt("110");
	// m_filePath=m_filePathEdit->toPlainText();
	m_filePath=QStringLiteral("C:/Foot2Last/Footdata/脚模_L_M.stl");
	QFile file(m_filePath);
	if(!file.open(QIODevice::ReadOnly))
	{
	qDebug()<<"read file failed"<<endl;
	}
	//QDataStream data(&file);
	QByteArray dataByteArray=file.readAll();

	//data>>dataByteArray;
	qDebug()<<dataByteArray.length()<<endl;
	m_client->sendBinaryMessage(dataByteArray);
	file.close();
	}

然后是Server:

#include "mainwindow.h"
	#include<QDataStream>
	#include<QFile>
	Mainwindow::Mainwindow(QWidget *parent)
	: QDialog(parent)
	{
	// m_button=new QPushButton(QStringLiteral("received"),this)
	m_label=new QLabel(QStringLiteral("init"),this);
	QHBoxLayout *hlay=new QHBoxLayout(this);
	hlay->addWidget(m_label);
	this->setLayout(hlay);
	this->setMinimumSize(500,800);


	ws=new QWebSocketServer("test", QWebSocketServer::NonSecureMode);
	if(!ws->listen(QHostAddress::Any, 12345)){
	qCritical()<<"Cannot listen to port 12345!";
	// return -1;
	}
	qDebug()<<"xxxxxxxxxxxxxxxxxxxxxxxxxxx"<<endl;
	connect(ws,SIGNAL(newConnection()),this,SLOT(onNewConnection()));
	}

	Mainwindow::~Mainwindow()
	{

	}

	void Mainwindow::onNewConnection()
	{
	m_server=ws->nextPendingConnection();
	connect(m_server,&QWebSocket::binaryMessageReceived,this,&Mainwindow::onBinaryDataReceived);
	qDebug()<<"new connection connected"<<endl;
	}


	void Mainwindow::onBinaryDataReceived( QByteArray message)
	{

	qDebug()<<"received"<<message.length()<<endl;
	QFile file("C:/Users/shining3d/Desktop/stl/test.stl");
	if(!file.open(QIODevice::ReadWrite\|QIODevice::Truncate))
	{
	qDebug()<<"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"<<endl;
	}
	//QDataStream dataStream(&file);
	//dataStream.setVersion(QDataStream::Qt_5_12);
	//dataStream<<message;

	file.write(message);
	file.close();



	}

上面的代码基本清楚了，如果想要具体的例子，请访问我的github.哈哈哈.

https://github.com/szgturnin

利用QWebsocket-进行数据的上传和下载。

猜你喜欢