qt5 上传图片到http服务器

转载请注明出处：http://www.cnblogs.com/dachen408/p/8185060.html

qt5 上传图片到http服务器，亲测可以用，qt5.8+vs2015，直接上码;

头文件：

#ifndef UPDATEPICTEST_H
#define UPDATEPICTEST_H

#include <QtWidgets/QMainWindow>
#include "ui_updatepictest.h"

#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QHttpMultiPart>
#include <QFile>
#include <QDataStream>
#include <QTextCodec>

class UpdatePicTest : public QMainWindow
{
	Q_OBJECT

public:
	UpdatePicTest(QWidget *parent = 0);
	~UpdatePicTest();

private slots:
	void slot_requestFinished();
	void on_pushButton_clicked();
	void upLoadError(QNetworkReply::NetworkError code);
	void uploadProcess(qint64 bytesReceived, qint64 bytesTotal);

private:
	QNetworkAccessManager * m_pNetWorkManager = NULL;

	void testUpload();

	QNetworkReply *reply;

private:
	Ui::UpdatePicTestClass ui;
};

#endif // UPDATEPICTEST_H

　　cpp，

http://ip:port改为对应的服务器和端口号

#include "updatepictest.h"
#include <QDebug>

UpdatePicTest::UpdatePicTest(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);

	m_pNetWorkManager = new QNetworkAccessManager();
}

UpdatePicTest::~UpdatePicTest()
{

}

void UpdatePicTest::slot_requestFinished()
{
	QByteArray resultContent = reply->readAll();
	QTextCodec* pCodec = QTextCodec::codecForName("UTF-8");
	QString strResult = pCodec->toUnicode(resultContent);
	int nHttpCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();//http返回码

	ui.textEdit->setPlainText(strResult);
	ui.edt_code->setText(QString("%1").arg(nHttpCode));
}

void UpdatePicTest::on_pushButton_clicked()
{
	testUpload();
}

void UpdatePicTest::upLoadError(QNetworkReply::NetworkError code)
{
	qDebug() << code;
}

void UpdatePicTest::uploadProcess(qint64 bytesReceived, qint64 bytesTotal)
{
	qDebug() << bytesReceived << bytesTotal;
}

void UpdatePicTest::testUpload()
{
	QString path = ui.lineEdit->text().trimmed();
	QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
	QHttpPart imagePart;
	imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("image/png"));
	imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QString("form-data; name=\"%1\"; filename=\"%2\"").arg("offline.png").arg(path));
	QFile *file = new QFile(path);
	file->open(QIODevice::ReadOnly);
	imagePart.setBodyDevice(file);
	imagePart.setBodyDevice(file);
	file->setParent(multiPart);
	multiPart->append(imagePart);

	QNetworkRequest request(QUrl("http://ip:port"));

	reply = m_pNetWorkManager->post(request, multiPart);
	multiPart->setParent(reply);

	connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(upLoadError(QNetworkReply::NetworkError)));
	connect(reply, SIGNAL(downloadProgress(qint64, qint64)), this, SLOT(uploadProcess(qint64, qint64)));
	connect(reply, SIGNAL(finished()), this, SLOT(slot_requestFinished()));

}