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QT使用HTTP下载来实现程序下载自动安装退出,同时读取JSON更新信息。

2022-08-26 22:30:45  阅读:55  来源: 互联网

标签:HTTP QT textEdit ui QString reply DialogUpgrade include 下载


最近在用QT开发一套免费的HelpDesk系统, 参考了网上的方法,实现了程序自动下载更新和程序自动退出再安装新程序,为了感谢网页的无私分享,自己也特地分享给大家,希望可以帮助到大家,如果有疑问,可以留言或者email:13692277450@139.com. 我开发的程序大家可以免费下载使用,地址: https://sourceforge.net/projects/super-helpdesk/ , 或者访问网站: www.pavogroup.top.

 



 



#include "dialogupgrade.h" #include "ui_dialogupgrade.h" //网络相关头文件 #include <QNetworkAccessManager> #include <QNetworkRequest> #include <QNetworkReply> //JSON相关头文件 #include <QJsonArray> #include <QJsonObject> #include <QJsonDocument> #include <QJsonParseError> #include <QTextStreamManipulator> #include <QMessageBox> #include <QDesktopServices> #include <QDebug> #include <QFile> #include <QTest> #include <QFileInfo> #include <unistd.h> #include <QSaveFile> #include <QThread> #include <QProcess> DialogUpgrade::DialogUpgrade(QWidget *parent) : QDialog(parent), ui(new Ui::DialogUpgrade) { ui->setupUi(this); Init (); // loadSetting (); Receive_Json(); } DialogUpgrade::~DialogUpgrade() { delete ui; } void DialogUpgrade::Init() { manager = new QNetworkAccessManager(this); myfile = new QFile(this); ui->progressBar->setFixedHeight (15); ui->progressBar->setValue (0); ui->progressBar->setAlignment (Qt::AlignVCenter); ui->lineEdit_Json->setVisible (false); ui->lineEdit->setVisible (false); ui->textEdit->append ("The Super HelpDesk current version is: Ver1.0 \n"); //ui->pushButton_upgrade->setDisabled (true); ui->pushButton_upgrade->setVisible (false); } void DialogUpgrade::on_pushButton_upgrade_clicked() { if(reply->isRunning ()) { return; } else { reply->reset (); myfile->close (); QNetworkRequest request; ui->lineEdit->setText ("http://www.pavogroup.top/superhelpdesk/superhelpdesk.exe"); QString Url = ui->lineEdit->text(); request.setUrl(QUrl(Url)); reply = manager->get(request); //发送请求 connect(reply,&QNetworkReply::readyRead,this,&DialogUpgrade::doProcessReadyRead); //可读 connect(reply,&QNetworkReply::finished,this,&DialogUpgrade::doProcessFinished); //结束 connect(reply,&QNetworkReply::downloadProgress,this,&DialogUpgrade::doProcessDownloadProgress); //大小 // connect(reply,QOverload<QNetworkReply::NetworkError>:: of(&QNetworkReply::error), this,&DialogUpgrade::doProcessError); //error QStringList list = Url.split("/"); QString filename = list.at(list.length()-1); QString file = "C:/" + filename; myfile->setFileName(file); bool ret = myfile->open(QIODevice::WriteOnly|QIODevice::Truncate); //创建文件 if(!ret) { QMessageBox::warning(this,"Warning","Download upgrade file failure, pls try again later!"); return; } downloadSetup = true; ui->progressBar->setValue(0); //设置进度条为0 ui->progressBar->setMinimum(0); } } void DialogUpgrade::doProcessReadyRead() //读取写入 { while(!reply->atEnd()) { QByteArray ba = reply->readAll(); myfile->write(ba); } } void DialogUpgrade::doProcessFinished() { myfile->close(); if(downloadSetup == true) { isDownloadFinished = true; Start_Install_New_Application(); } } void DialogUpgrade::doProcessDownloadProgress(qint64 recv_total, qint64 all_total) //显示 { ui->progressBar->setMaximum(all_total); ui->progressBar->setValue(recv_total); // QStringList list = ui->lineEdit->text().split("/"); // QString filename = list.at(list.length()-1); // QString data = "--" + filename; } void DialogUpgrade::doProcessError(QNetworkReply::NetworkError code) { qDebug() << code; } void DialogUpgrade::on_pushButton_exit_clicked() { myfile->close (); this->hide (); } void DialogUpgrade::on_pushButton_Check_Upgrade_clicked() { ui->textEdit->clear (); ui->textEdit->append ("The Super HelpDesk current version is: Ver1.0 \n"); ui->textEdit->append ("The lastest upgrade infromation: \n \n"); QFile settingFile; settingFile.setFileName ("C:/superhelpdeskupgrade.json"); if(settingFile.open(QIODevice::ReadOnly|QIODevice::Text)) { QByteArray setting = settingFile.readAll ().trimmed (); QJsonParseError jsonError; QJsonDocument jsonDoc(QJsonDocument::fromJson(setting, &jsonError)); QJsonObject rootObj = jsonDoc.object(); QString LatestVersion = rootObj.value("LastestVersion").toString (); QString UpdateTime = rootObj.value("UpdateTime").toString (); QString ReleaseNote = rootObj.value("ReleaseNote").toString(); QString Url = rootObj.value("Url").toString(); ui->textEdit->append ("Lastest Version : " + LatestVersion + "\n"); ui->textEdit->append ("Update Time : " + UpdateTime + "\n"); ui->textEdit->append ("Release Notes : " + ReleaseNote + "\n"); ui->textEdit->append ("\nSuccess to read upgrade version file! you can click download & upgrade button to download new version application, the new application installation package will be kept in C:\. \n"); ui->pushButton_upgrade->setVisible (true); isCheckUpgradeDone = true; } else { ui->textEdit->append ("Sorry, Open upgrade version file failure! \n \n"); } } void DialogUpgrade::Receive_Json() { ui->textEdit->clear (); ui->textEdit->append ("The Super HelpDesk current version is: Ver1.0 \n"); myfile->close (); QNetworkRequest request; ui->lineEdit->setText ("http://www.pavogroup.top/superhelpdesk/superhelpdeskupgrade.json"); QString Url = ui->lineEdit->text(); request.setUrl(QUrl(Url)); reply = manager->get(request); //发送请求 QTest::qSleep (100); connect(reply,&QNetworkReply::readyRead,this,&DialogUpgrade::doProcessReadyRead); //可读 connect(reply,&QNetworkReply::finished,this,&DialogUpgrade::doProcessFinished); //结束 connect(reply,&QNetworkReply::downloadProgress,this,&DialogUpgrade::doProcessDownloadProgress); //大小 // connect(reply,QOverload<QNetworkReply::NetworkError>:: of(&QNetworkReply::error), this,&DialogUpgrade::doProcessError); //error QStringList list = Url.split("/"); QString filename = list.at(list.length()-1); QString file = "C:/" + filename; myfile->setFileName(file); bool ret = myfile->open(QIODevice::WriteOnly|QIODevice::Truncate|QIODevice::Text); //创建文件 if(!ret) { ui->textEdit->append ("Can not connect to upgrade server, pls check your connection or try again later!"); return; } else { ui->textEdit->append ("Connect Super HelpDesk home website www.pavogroup.top successed. \n \n"); return; } myfile->aboutToClose (); myfile->flush (); ui->progressBar->setValue(0); //设置进度条初始化为0 ui->progressBar->setMinimum(0); return; } void DialogUpgrade::on_progressBar_valueChanged(int value) { } void DialogUpgrade::Start_Install_New_Application() { ui->textEdit->append ("Application download finished and keep installation file is C:\superhelpdesk.exe"); qDebug() << "Start exit program and install new...."; QProcess process(this); QString str ="C:/superhelpdesk.exe";//加可执行文件路径 //qApp->setApplicationName (str); qApp->quit (); process.startDetached(str);//启动可执行文件 // QProcess::startDetached(qApp->applicationFilePath(), QStringList()); }

 

标签:HTTP,QT,textEdit,ui,QString,reply,DialogUpgrade,include,下载
来源: https://www.cnblogs.com/managechina/p/16629445.html

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