我正在尝试使用Qt中的MultiPart将图像上传到我的网络服务器。当我通过按钮从我的MainWindow运行下面的代码时,它工作正常。
当我尝试在继承自移动到线程的QObject的类中实现确切代码时,它没有达到te SIGNAL / SLOT并且没有上传文件。
有人可以指出我的错误在哪里吗?对此有一段时间没有任何积极的结果。
谢谢!
线程/工人类的实现
#include "screenshotworker.h"
#include "session.h"
#include "json.h"
#include "mainwindow.h"
#include <QtNetwork>
#include <QByteArray>
#include <QMessageBox>
#include <QDesktopWidget>
#include <QApplication>
ScreenshotWorker::ScreenshotWorker(QObject *parent) : QObject(parent)
{
}
void ScreenshotWorker::DoSetup(QThread *cThread, Session *aSession)
{
session = aSession;
connect(cThread, SIGNAL(started()), this, SLOT(DoWork()));
}
void ScreenshotWorker::DoWork()
{
while(session->sessActive)
{
QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
QHttpPart textPart;
textPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"session\""));
textPart.setBody(QByteArray::number(session->session_id));
QHttpPart imagePart;
imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("image/png"));
imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"userfile\"; filename=\"screen.png\""));
QFile *file = new QFile("screen.png");
file->open(QIODevice::ReadOnly);
imagePart.setBodyDevice(file);
file->setParent(multiPart); // we cannot delete the file now, so delete it with the multiPart
multiPart->append(textPart);
multiPart->append(imagePart);
QUrl url("http://........");
QNetworkRequest request(url);
QNetworkAccessManager *manager = new QNetworkAccessManager();
reply = manager->post(request, multiPart);
multiPart->setParent(reply); // delete the multiPart with the reply
connect(reply, SIGNAL( uploadProgress(qint64, qint64) ), this, SLOT( uploadProgress(qint64,qint64) ) ) ;
connect(reply, SIGNAL(finished()), this, SLOT(uploadDone()));
sleep(10);
}
}
void ScreenshotWorker::uploadProgress(qint64 bytesSent, qint64 bytesTotal) {
qDebug() << "Uploaded" << bytesSent << "of" << bytesTotal;
}
void ScreenshotWorker::uploadDone() {
qDebug() << "Finished" << reply->errorString() <<reply->attribute( QNetworkRequest::HttpStatusCodeAttribute).toInt();
qDebug()<<reply->readAll();
reply->deleteLater();
}
按下按钮,启动线程。
QThread *cThread2 = new QThread();
ScreenshotWorker *cWorker2 = new ScreenshotWorker();
cWorker2->DoSetup(cThread2, mSession);
cWorker2->moveToThread(cThread2);
cThread2->start();
答案 0 :(得分:0)
感谢上面的评论,我能够通过添加事件循环来解决这个问题。
QEventLoop loop;
connect(reply, SIGNAL(finished()),&loop, SLOT(quit()));
loop.exec();