Qt之小项目实战----刷csdn访问量工具

一、设计

使用QT5.8 +QT creater

使用这两个累

      QNetworkReply

      QNetworkAccessManager

       1.定义访问的文章

       2.模拟浏览器发送请求

二、核心编码

  

   

    

     

    
    

     

      #ifndef MAINWINDOW_H
     
    
   

    

     

    
    

     

      #define MAINWINDOW_H
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #include <QMainWindow>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #include <QtNetwork/QNetworkAccessManager>
     
    
   

    

     

    
    

     

      #include <QtNetwork/QNetworkReply>
     
    
   

    

     

    
    

     

      #include <QtNetwork/QNetworkRequest>
     
    
   

    

     

    
    

     

      #include <QTimer>
     
    
   

    

     

    
    

     

      #include <QSslConfiguration>
     
    
   

    

     

    
    

     

      #include <QString>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      namespace Ui {
     
    
   

    

     

    
    

     

      class MainWindow;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      class MainWindow : public QMainWindow
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          Q_OBJECT
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      public:
     
    
   

    

     

    
    

     
    explicit MainWindow(QWidget *parent = 0);
     
    
   

    

     

    
    

     

          ~MainWindow();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      public slots:
     
    
   

    

     

    
    

     
    void slot_requestFinished();
     
    
   

    

     

    
    

     
    void on_pushButton_clicked();
     
    
   

    

     

    
    

     
    void slot_requestTimeout();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      signals:
     
    
   

    

     

    
    

     
    void signal_requestFinished(bool bSuccess,const QString& strResult); //http请求结束
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      private:
     
    
   

    

     

    
    

     

          Ui::MainWindow *ui;
     
    
   

    

     

    
    

     

          QNetworkAccessManager* m_pNetworkManager;//网络管理类
     
    
   

    

     

    
    

     

          QNetworkReply* m_pNetworkReply; //封装请求返回信息
     
    
   

    

     

    
    

     

          QTimer* m_pTimer; //请求超时计时器
     
    
   

    

     

    
    

     

          QString m_strUrl; //记录当前请求的url
     
    
   

    

     

    
    

     

      };
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #endif // MAINWINDOW_H
     
    
  
 

  

   

    

     

    
    

     

      #include "mainwindow.h"
     
    
   

    

     

    
    

     

      #include "ui_mainwindow.h"
     
    
   

    

     

    
    

     

      #include <QTextCodec>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      MainWindow::MainWindow(QWidget *parent) :
     
    
   

    

     

    
    

     
    QMainWindow(parent),
     
    
   

    

     

    
    

     
    ui(new Ui::MainWindow)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          ui->setupUi(this);
     
    
   

    

     

    
    

     

          m_pNetworkReply = NULL;
     
    
   

    

     

    
    

     

          m_pTimer = new QTimer(this);
     
    
   

    

     

    
    

     
    connect(m_pTimer,SIGNAL(timeout()),this,SLOT(slot_requestTimeout()));//超时信号
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      MainWindow::~MainWindow()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    delete ui;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      const int nHTTP_TIME = 3000; //10秒
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MainWindow::on_pushButton_clicked()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          m_pTimer->start(3000);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          m_pNetworkManager = new QNetworkAccessManager(this);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          QString strUrl = "http://blog.csdn.net/hiwoshixiaoyu/article/details/72763130";
     
    
   

    

     

    
    

     

          QNetworkRequest netRequest;
     
    
   

    

     

    
    

     

          netRequest.setRawHeader("Accept","*/*");
     
    
   

    

     

    
    

     

          netRequest.setRawHeader("Accept-Language","zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");
     
    
   

    

     

    
    

     

          netRequest.setUrl(QUrl(strUrl)); //地址信息
     
    
   

    

     

    
    

     
    if(strUrl.toLower().startsWith("https"))//libeay32.dll和ssleay32.dll
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              QSslConfiguration sslConfig;
     
    
   

    

     

    
    

     

              sslConfig.setPeerVerifyMode(QSslSocket::VerifyNone);
     
    
   

    

     

    
    

     

              sslConfig.setProtocol(QSsl::TlsV1_1);
     
    
   

    

     

    
    

     

              netRequest.setSslConfiguration(sslConfig);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          m_pNetworkManager->clearAccessCache();
     
    
   

    

     

    
    

     

          m_pNetworkReply = m_pNetworkManager->get(netRequest); //发起get请求
     
    
   

    

     

    
    

     
    connect(m_pNetworkReply,SIGNAL(finished()),this,SLOT(slot_requestFinished())); //请求完成信号
     
    
   

    

     

    
    

     

          m_pTimer->start(nHTTP_TIME);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      #include <windows.h>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MainWindow::slot_requestFinished()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          m_pTimer->stop();//关闭定时器
     
    
   

    

     

    
    

     

          QByteArray resultContent = m_pNetworkReply->readAll();
     
    
   

    

     

    
    

     

          QTextCodec* pCodec = QTextCodec::codecForName("UTF-8");
     
    
   

    

     

    
    

     

          QString strResult = pCodec->toUnicode(resultContent);
     
    
   

    

     

    
    

     
    int nHttpCode = m_pNetworkReply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();//http返回码
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          QString qStrDest1 = "访问：";
     
    
   

    

     

    
    

     

          QString qStrDest2 = "</span>";
     
    
   

    

     

    
    

     
    if(nHttpCode == 200)//成功
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        int pos1 = strResult.indexOf(qStrDest1);
     
    
   

    

     

    
    

     

              QString temp = strResult.mid(pos1,200);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
        int pos2 = temp.indexOf(qStrDest2)+qStrDest2.length();
     
    
   

    

     

    
    

     

              QString temp2 = temp.left(pos2);
     
    
   

    

     

    
    

     

              ui->m_RequestNum->setText(temp2);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
        emit signal_requestFinished(true,strResult);//请求失败
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    else
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              emit signal_requestFinished(false,strResult);//请求失败
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          m_pNetworkReply->deleteLater();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    Sleep(1000);
     
    
   

    

     

    
    

     
    on_pushButton_clicked();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      //请求超时
     
    
   

    

     

    
    

     

      void MainWindow::slot_requestTimeout()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    emit signal_requestFinished(false,"timeout");//请求失败
     
    
   

    

     

    
    

     

          m_pNetworkReply->deleteLater();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
  
 

三、总结

  1.工具源码下载地址。

     http://download.csdn.net/detail/hiwoshixiaoyu/9857560

  2.后续推出一个起线程的版本，防止总卡死的问题。

文章来源: yujiang.blog.csdn.net，作者：鱼酱2333，版权归原作者所有，如需转载，请联系作者。

原文链接：yujiang.blog.csdn.net/article/details/72830694