QT TCP 文件传输

#include "dialog.h" #include "ui_dialog.h" #include "nfclient.h" #include <QFileDialog> #include <QHostAddress> #include <QMessageBox> Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { sendBytes = 0; blockNumber = 0; maxBytes = 0; cleanQuit = true; ui->setupUi(this); ui->progressBar->setRange(0, 1000); ui->progressBar->setValue(0); } Dialog::~Dialog() { delete ui; } void Dialog::on_pushButtonBrow_clicked() { ui->lineEditFile->setText(QFileDialog::getOpenFileName(this, tr("Open File"), tr("."), tr("All Files (*)"))); } void Dialog::on_pushButtonSend_clicked() { cleanQuit = false; sendBytes = 0; blockNumber = 0; maxBytes = 0; if(ui->lineEditTag->text().isEmpty() || ui->lineEditFile->text().isEmpty()) { QMessageBox::information(this, tr("Error"), tr("Tag and File can not be empty.")); return; } ui->pushButtonSend->setEnabled(false); nfClient* client = new nfClient(this); connect(client, SIGNAL(disconnected()), client, SLOT(deleteLater())); connect(client, SIGNAL(disconnected()), this, SLOT(on_socketDisconnected())); connect(client, SIGNAL(fileSize(qint64)), this, SLOT(setProccessBar(qint64))); connect(client, SIGNAL(bytesWritten(qint64)), this, SLOT(updateProccessBar(qint64))); connect(client, SIGNAL(message(QString)), this, SLOT(updateStatusLabel(QString))); connect(client, SIGNAL(onError(qint32)), this, SLOT(on_socketError(qint32))); client->sendFile(ui->lineEditFile->text(), ui->lineEditTag->text()); } void Dialog::updateProccessBar(qint64 v) { blockNumber ++; sendBytes += v; ui->progressBar->setValue(sendBytes); qDebug() << "sended number " << blockNumber << ", cur " << v << ". " << sendBytes << " bytes. total " << maxBytes << " bytes."; } void Dialog::updateStatusLabel(const QString &status) { QString st; st = "Status: " + status; ui->labelStatus->setText(st); } void Dialog::setProccessBar(qint64 r) { maxBytes = r; ui->progressBar->setRange(0, r-1); } void Dialog::on_socketDisconnected() { ui->progressBar->setRange(0, 100); ui->progressBar->setValue(100); ui->pushButtonSend->setEnabled(true); cleanQuit = true; } void Dialog::on_pushButtonQuit_clicked() { if(cleanQuit) close(); else { if(QMessageBox::warning(this, tr("Are you sure!"), tr("You have file transting.\nAre you sure you want quit?"), QMessageBox::Ok, QMessageBox::Cancel) == QMessageBox::Ok) close(); } } void Dialog::on_socketError(qint32 e) { switch(e) { case 1: QMessageBox::warning(this, tr("Error"), QString::fromUtf8("目标名错误!\n请输入有效的主机名或IP地址。"), QMessageBox::Close); break; case 2: QMessageBox::warning(this, tr("Error"), QString::fromUtf8("文件名错误!\n请输入有效的文件名及路径。"), QMessageBox::Close); break; case 3: QMessageBox::warning(this, tr("Error"), QString::fromUtf8("连接目标服务器失败!\n请检查网络连接，如果问题依然存在请联系目标服务器管理员。"), QMessageBox::Close); } ui->pushButtonSend->setEnabled(true); }