How do I send a http request to a server using C++

https://mapi.alipay.com/gateway.do?/_input_charset=UTF-8¤cy=USD¬ify_url=10.237.221.84:80&out_trade_no=123456789&partner=2088101122136241&sign=760bdzec6y9goq7ctyx96ezkz78287de&subject=Coke&sign_type=MD5&service=create_forex_trade&total_fee=0.01

 #include <qcoreapplication>
 #include "sockettest.h"
 #include <iostream>
 #include <string>
 #include <qcoreapplication>
 #include <qcryptographichash>
 #include <qdebug>
 #include <qurl>
 #include <qnetworkrequest.h>
 #include <qnetworkaccessmanager.h>
 #include <qnetworkreply.h>


SocketTest::SocketTest(QObject *parent) : QObject(parent)
{

}




void SocketTest::test()
{
	socket = new QTcpSocket(this);

	connect(socket, SIGNAL(connected()), this, SLOT(connected()));

	connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
	connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
	connect(socket, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWritten(qint64)));



	qDebug() << "Connecting...";
    socket->connectToHost("mapi.alipay.com",443);

	if (!socket->waitForConnected(1000))
	{
		qDebug() << "Error: \n\n" << socket->errorString();
	}

}

void SocketTest::connected()
{

	qDebug() << "Connected!";
	QByteArray output;


    QByteArray alipay_tran_req;
    QByteArray alipay_tran_req2;
    alipay_tran_req = "https://mapi.alipay.com/gateway.do?/_input_charset=UTF-8¤cy=USD¬ify_url=10.237.221.84:80&out_trade_no=123456789&partner=2088101122136241&";
    alipay_tran_req2 ="&subject=Coke&sign_type=MD5&service=create_forex_trade&total_fee=0.01";

	QCryptographicHash CalculateMd5(QCryptographicHash::Md5);
    CalculateMd5.addData(output);
    output = alipay_tran_req + "sign=" + (CalculateMd5.result().toHex())+ alipay_tran_req2;
    qDebug() << "Input String" << output;
    qDebug() << socket->write(alipay_tran_req) << socket->write(output);
    socket->write(output);






}

void SocketTest::disconnected()
{
	qDebug() << "Disconnected!\n";
}
void SocketTest::bytesWritten(qint64 bytes)
{
	qDebug() << "\nWe Wrote: \n" << bytes;
}
void SocketTest::readyRead()
{

	qDebug() << "\nReading!\n";
	qDebug() << socket->readAll();

}