Qt5 http/HTTPS访问 以及JSON解析的实用

实用QT5访问HTTP/以及HTTPS协议访问

并且调用Json解析

 #include "mywidget.h"
 #include "ui_mywidget.h"
 #include <QUrl>
 #include <QDebug>
 #include <QByteArray>
 #include <QSslConfiguration>
 #include <QJsonDocument>
 #include <QJsonParseError>
 #include <QJsonObject>
 #include <QJsonValue>
 MyWidget::MyWidget(QWidget *parent) :
     QWidget(parent),
     ui(new Ui::MyWidget)
 {
     ui->setupUi(this);
     QUrl url;
     m_AccessManager = new QNetworkAccessManager(this);
     url.setUrl("http://ip.taobao.com/service/getIpInfo2.php");
     QSslConfiguration config;
     config.setPeerVerifyMode(QSslSocket::VerifyNone);
     config.setProtocol(QSsl::TlsV1SslV3);
     m_Request.setSslConfiguration(config);
     m_Request.setUrl(url);
     QByteArray sendData;
     sendData = QString::fromStdString("ip=27.106.204.0").toLocal8Bit();
     m_Request.setRawHeader("Accept","*/*");
     m_Request.setRawHeader("Accept-Language","zh-CN,zh;q=0.9");
     m_Request.setRawHeader("Content-Type","application/x-www-form-urlencoded");
     m_Request.setRawHeader("User-Agent","Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36");
     m_Request.setRawHeader("X-Requested-With:","XMLHttpRequest");
     m_Request.setRawHeader("Referer","http://ip.taobao.com/ipSearch.html");
     m_Reply = m_AccessManager->post(m_Request,sendData);

     connect(m_AccessManager,&QNetworkAccessManager::finished,this,&MyWidget::ReplyReadFunc);

 }

 MyWidget::~MyWidget()
 {
     delete ui;
 }
 void MyWidget::ReplyReadFunc(QNetworkReply* Reply)
 {
     int NetworkErrors = -;
     NetworkErrors = Reply->error();
     QString ip;
     QString country;
     QString region;
     QString isp;

     if(NetworkErrors ==QNetworkReply::NoError)
     {
         QByteArray databuff = Reply->readAll();
         QString result = QString::fromStdString(databuff.toStdString()).toUtf8();
         QJsonDocument document;
         QJsonParseError ParseError;
         document =QJsonDocument::fromJson(result.toUtf8(),&ParseError);
         if(!document.isNull() && ParseError.error == QJsonParseError::NoError)
         {
             if(document.isObject())
             {
                 QJsonObject Object = document.object(); //获取文档对象
                 if(!Object.isEmpty())
                 {

                     if(Object.contains("data")) //先判断有没有
                     {
                         QJsonValue dataObj = Object.value("data");
                         if(dataObj.isObject())  //判断是否是对象
                         {
                             QJsonObject ObjectData = dataObj.toObject();
                             if(ObjectData.contains("ip"))
                             {
                                 QJsonValue ipVal = ObjectData.value("ip");
                                 if(ipVal.isString())
                                 {
                                     ip = ipVal.toString();
                                 }
                             }
                             if(ObjectData.contains("region"))
                             {
                                 QJsonValue regionVal = ObjectData.value("region");
                                 if(regionVal.isString())
                                 {
                                     region = regionVal.toString();
                                 }
                             }
                             if(ObjectData.contains("isp"))
                             {
                                 QJsonValue ispVal = ObjectData.value("isp");
                                 if(ispVal.isString())
                                 {
                                     isp = ispVal.toString();
                                 }
                             }
                         }
                     }
                 }
             }
             country+="您的ip:"+ip;
             country+="所在城市:"+region;
             country+="运营商:"+isp;

             qDebug()<<country.toStdString().c_str();
         }
     }
 }

运行结果