qt 发送http请求

• .h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QtNetwork>

QT_BEGIN_NAMESPACE
namespace Ui {
class Widget;
}
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
    void replyFinished();

private slots:
    void on_pushButton_clicked();

private:
    Ui::Widget *ui;
    QNetworkAccessManager *manager;
    QNetworkRequest request;
    QNetworkReply *reply;
};
#endif // WIDGET_H

• .cpp

#include "widget.h"
#include "ui_widget.h"



Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    manager = new QNetworkAccessManager(this);
    connect(manager, &QNetworkAccessManager::finished,this, &Widget::replyFinished);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_clicked()
{
    request = QNetworkRequest(QUrl("http://127.0.0.1:9090/api/getUserInfo"));
    reply = manager->get(request);
}


void Widget::replyFinished() {
    if (reply->error() == QNetworkReply::NoError) {
        QByteArray data = reply->readAll();
        qDebug() << data;

        QJsonDocument document;
        QJsonParseError error;
        QJsonObject rootObject = QJsonDocument::fromJson(data, &error).object();

        qDebug() << rootObject;

        QJsonObject _data = rootObject["data"].toObject();

        QString username = _data["username"].toString();
        int age = _data["age"].toInt();
        QString job = _data["job"].toString();

        QString result = QString("User Info: name: %1, age %2, job is %3").arg(username).arg(age).arg(job);

        qDebug() << result;

    } else {
        qDebug() << "Error:" << reply->errorString();
    }
}