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
#include
#include
#include
#include
#include
#include
#include
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