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

  1 #include "mywidget.h"
  2 #include "ui_mywidget.h"
  3 #include <QUrl>
  4 #include <QDebug>
  5 #include <QByteArray>
  6 #include <QSslConfiguration>
  7 #include <QJsonDocument>
  8 #include <QJsonParseError>
  9 #include <QJsonObject>
 10 #include <QJsonValue>
 11 MyWidget::MyWidget(QWidget *parent) :
 12     QWidget(parent),
 13     ui(new Ui::MyWidget)
 14 {
 15     ui->setupUi(this);
 16     QUrl url;
 17     m_AccessManager = new QNetworkAccessManager(this);
 18     url.setUrl("http://ip.taobao.com/service/getIpInfo2.php");
 19     QSslConfiguration config;
 20     config.setPeerVerifyMode(QSslSocket::VerifyNone);
 21     config.setProtocol(QSsl::TlsV1SslV3);
 22     m_Request.setSslConfiguration(config);
 23     m_Request.setUrl(url);
 24     QByteArray sendData;
 25     sendData = QString::fromStdString("ip=27.106.204.0").toLocal8Bit();
 26     m_Request.setRawHeader("Accept","*/*");
 27     m_Request.setRawHeader("Accept-Language","zh-CN,zh;q=0.9");
 28     m_Request.setRawHeader("Content-Type","application/x-www-form-urlencoded");
 29     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");
 30     m_Request.setRawHeader("X-Requested-With:","XMLHttpRequest");
 31     m_Request.setRawHeader("Referer","http://ip.taobao.com/ipSearch.html");
 32     m_Reply = m_AccessManager->post(m_Request,sendData);
 33
 34     connect(m_AccessManager,&QNetworkAccessManager::finished,this,&MyWidget::ReplyReadFunc);
 35
 36 }
 37
 38 MyWidget::~MyWidget()
 39 {
 40     delete ui;
 41 }
 42 void MyWidget::ReplyReadFunc(QNetworkReply* Reply)
 43 {
 44     int NetworkErrors = -1;
 45     NetworkErrors = Reply->error();
 46     QString ip;
 47     QString country;
 48     QString region;
 49     QString isp;
 50
 51     if(NetworkErrors ==QNetworkReply::NoError)
 52     {
 53         QByteArray databuff = Reply->readAll();
 54         QString result = QString::fromStdString(databuff.toStdString()).toUtf8();
 55         QJsonDocument document;
 56         QJsonParseError ParseError;
 57         document =QJsonDocument::fromJson(result.toUtf8(),&ParseError);
 58         if(!document.isNull() && ParseError.error == QJsonParseError::NoError)
 59         {
 60             if(document.isObject())
 61             {
 62                 QJsonObject Object = document.object(); //获取文档对象
 63                 if(!Object.isEmpty())
 64                 {
 65
 66                     if(Object.contains("data")) //先判断有没有
 67                     {
 68                         QJsonValue dataObj = Object.value("data");
 69                         if(dataObj.isObject())  //判断是否是对象
 70                         {
 71                             QJsonObject ObjectData = dataObj.toObject();
 72                             if(ObjectData.contains("ip"))
 73                             {
 74                                 QJsonValue ipVal = ObjectData.value("ip");
 75                                 if(ipVal.isString())
 76                                 {
 77                                     ip = ipVal.toString();
 78                                 }
 79                             }
 80                             if(ObjectData.contains("region"))
 81                             {
 82                                 QJsonValue regionVal = ObjectData.value("region");
 83                                 if(regionVal.isString())
 84                                 {
 85                                     region = regionVal.toString();
 86                                 }
 87                             }
 88                             if(ObjectData.contains("isp"))
 89                             {
 90                                 QJsonValue ispVal = ObjectData.value("isp");
 91                                 if(ispVal.isString())
 92                                 {
 93                                     isp = ispVal.toString();
 94                                 }
 95                             }
 96                         }
 97                     }
 98                 }
 99             }
100             country+="您的ip:"+ip;
101             country+="所在城市:"+region;
102             country+="运营商:"+isp;
103
104             qDebug()<<country.toStdString().c_str();
105         }
106     }
107 }

运行结果

原文地址：https://www.cnblogs.com/guolongzheng/p/9122836.html