FTP.rar_FTP 下载_FTP下载 linux_ftp_ftp 客户端_ftp客户端

#ifndef FTPWINDOW_H #define FTPWINDOW_H #include <QDialog> #include <QHash> class QDialogButtonBox; class QFile; class QFtp; class QLabel; class QLineEdit; class QTreeWidget; class QTreeWidgetItem; class QProgressDialog; class QPushButton; class QUrlInfo; class FtpWindow : public QDialog { Q_OBJECT public: FtpWindow(QWidget *parent = 0); QSize sizeHint() const; private slots: void connectOrDisconnect(); void downloadFile(); void cancelDownload(); void ftpCommandFinished(int commandId, bool error); void addToList(const QUrlInfo &urlInfo); void processItem(QTreeWidgetItem *item, int column); void cdToParent(); void updateDataTransferProgress(qint64 readBytes, qint64 totalBytes); void enableDownloadButton(); private: QLabel *ftpServerLabel; QLineEdit *ftpServerLineEdit; QLabel *statusLabel; QTreeWidget *fileList; QPushButton *cdToParentButton; QPushButton *connectButton; QPushButton *downloadButton; QPushButton *quitButton; QDialogButtonBox *buttonBox; QProgressDialog *progressDialog; QHash<QString, bool> isDirectory; QString currentPath; QFtp *ftp; QFile *file; }; #endif #include <QtGui> #include <QtNetwork> #include "ftpwindow.h" FtpWindow::FtpWindow(QWidget *parent) : QDialog(parent), ftp(0) { ftpServerLabel = new QLabel(tr("Ftp &server:")); ftpServerLineEdit = new QLineEdit("ftp.trolltech.com"); ftpServerLabel->setBuddy(ftpServerLineEdit); statusLabel = new QLabel(tr("Please enter the name of an FTP server.")); fileList = new QTreeWidget; fileList->setEnabled(false); fileList->setRootIsDecorated(false); fileList->setHeaderLabels(QStringList() << tr("Name") << tr("Size") << tr("Owner") << tr("Group") << tr("Time")); fileList->header()->setStretchLastSection(false); connectButton = new QPushButton(tr("Connect")); connectButton->setDefault(true); cdToParentButton = new QPushButton; cdToParentButton->setIcon(QPixmap(":/images/cdtoparent.png")); cdToParentButton->setEnabled(false); downloadButton = new QPushButton(tr("Download")); downloadButton->setEnabled(false); quitButton = new QPushButton(tr("Quit")); buttonBox = new QDialogButtonBox; buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole); buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); progressDialog = new QProgressDialog(this); connect(fileList, SIGNAL(itemActivated(QTreeWidgetItem *, int)), this, SLOT(processItem(QTreeWidgetItem *, int))); connect(fileList, SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)), this, SLOT(enableDownloadButton())); connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload())); connect(connectButton, SIGNAL(clicked()), this, SLOT(connectOrDisconnect())); connect(cdToParentButton, SIGNAL(clicked()), this, SLOT(cdToParent())); connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile())); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); QHBoxLayout *topLayout = new QHBoxLayout; topLayout->addWidget(ftpServerLabel); topLayout->addWidget(ftpServerLineEdit); topLayout->addWidget(cdToParentButton); topLayout->addWidget(connectButton); QVBoxLayout *mainLayout = new QVBoxLayout; mainLayout->addLayout(topLayout); mainLayout->addWidget(fileList); mainLayout->addWidget(statusLabel); mainLayout->addWidget(buttonBox); setLayout(mainLayout); setWindowTitle(tr("FTP")); } QSize FtpWindow::sizeHint() const { return QSize(500, 300); } void FtpWindow::connectOrDisconnect() { if (ftp) { ftp->abort(); ftp->deleteLater(); ftp = 0; fileList->setEnabled(false); cdToParentButton->setEnabled(false); downloadButton->setEnabled(false); connectButton->setEnabled(true); connectButton->setText(tr("Connect")); setCursor(Qt::ArrowCursor); return; } setCursor(Qt::WaitCursor); ftp = new QFtp(this); connect(ftp, SIGNAL(commandFinished(int, bool)), this, SLOT(ftpCommandFinished(int, bool))); connect(ftp, SIGNAL(listInfo(const QUrlInfo &)), this, SLOT(addToList(const QUrlInfo &))); connect(ftp, SIGNAL(dataTransferProgress(qint64, qint64)), this, SLOT(updateDataTransferProgress(qint64, qint64))); fileList->clear(); currentPath.clear(); isDirectory.clear(); QUrl url(ftpServerLineEdit->text()); if (!url.isValid() || url.scheme().toLower() != QLatin1String("ftp")) { ftp->connectToHost(ftpServerLineEdit->text(), 21); ftp->login(); } else { ftp->connectToHost(url.host(), url.port(21)); if (!url.userName().isEmpty()) ftp->login(QUrl::fromPercentEncoding(url.userName().toLatin1()), url.password()); else ftp->login(); if (!url.path().isEmpty()) ftp->cd(url.path()); } fileList->setEnabled(true); connectButton->setEnabled(false); connectButton->setText(tr("Disconnect")); statusLabel->setText(tr("Connecting to FTP server %1...") .arg(ftpServerLineEdit->text())); } void FtpWindow::downloadFile() { QString fileName = fileList->currentItem()->text(0); if (QFile::exists(fileName)) { QMessageBox::information(this, tr("FTP"), tr("There already exists a file called %1 in " "the current directory.") .arg(fileName)); return; } file = new QFile(fileName); if (!file->open(QIODevice::WriteOnly)) { QMessageBox::information(this, tr("FTP"), tr("Unable to save the file %1: %2.") .arg(fileName).arg(file->errorString())); delete file; return; } ftp->get(fileList->currentItem()->text(0), file); progressDialog->setLabelText(tr("Downloading %1...").arg(fileName)); downloadButton->setEnabled(false); progressDialog->exec(); } void FtpWindow::cancelDownload() { ftp->abort(); } void FtpWindow::ftpCommandFinished(int, bool error) { setCursor(Qt::ArrowCursor); if (ftp->currentCommand() == QFtp::ConnectToHost) { if (error) { QMessageBox::information(this, tr("FTP"), tr("Unable to connect to the FTP server " "at %1. Please check that the host " "name is correct.") .arg(ftpServerLineEdit->text())); connectOrDisconnect(); return; } statusLabel->setText(tr("Logged onto %1.") .arg(ftpServerLineEdit->text())); fileList->setFocus(); downloadButton->setDefault(true); connectButton->setEnabled(true); return; } if (ftp->currentCommand() == QFtp::Login) ftp->list(); if (ftp->currentCommand() == QFtp::Get) { if (error) { statusLabel->setText(tr("Canceled download of %1.") .arg(file->fileName())); file->close(); file->remove(); } else { statusLabel->setText(tr("Downloaded %1 to current directory.") .arg(file->fileName())); file->close(); } delete file; enableDownloadButton(); progressDialog->hide(); } else if (ftp->currentCommand() == QFtp::List) {