Qt实现客户端发送Http请求-蒲公英云

Qt实现客户端发送Http请求

首先开发一个Http的服务器，这里使用springboot快速开发一个Get接口和一个Post接口

@RestController
public class httpServer {
    @GetMapping("/get")
    public String getTest(String a){
        return "get return:hello "+a;
    }
    @PostMapping("/post")
    public String postTest(String b){
        return "post return:hello "+b;
    }
}

指定服务器的端口为8088

ok，下面回到qt ，新建一个QWidget窗口，

添加网络支持

QT += network

进入ui设计,拖入4个label控件和一个button控件

在这里插入图片描述

回到wid窗口对应的代码区

输入一下代码

#include "widget.h"
#include "ui_widget.h"
#include<QNetworkAccessManager>
#include<QNetworkReply>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
  }
void Widget::finishedSlot(QNetworkReply *reply)
{
     if (reply->error() == QNetworkReply::NoError)
     {
         QByteArray bytes = reply->readAll();
         qDebug() << bytes;
         if(reply->url()==QUrl("http://127.0.0.1:8088/get?a=qt")){
              ui->label_3->setText(bytes);
         }else{
              ui->label_4->setText(bytes);
         }
     }
     else
     {
         qDebug() << "finishedSlot errors here";
         qDebug( "found error .... code: %d\n", (int)reply->error());
         qDebug(qPrintable(reply->errorString()));
     }
     reply->deleteLater();
}
Widget::~Widget()
{
    delete ui;
}
void Widget::on_pushButton_clicked()
{
    QNetworkAccessManager *accessManager = new QNetworkAccessManager(this);
    connect(accessManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finishedSlot(QNetworkReply*)));
    QNetworkRequest request;
    request.setUrl(QUrl("http://127.0.0.1:8088/get?a=qt"));
    //get
   accessManager->get(request);
    request.setUrl(QUrl("http://127.0.0.1:8088/post"));
    QByteArray postData;
    postData.append("b=qt");
    //post
    accessManager->post(request, postData);
}