qt4-ftp源代码

/**************************************************************************** ** ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http://www.trolltech.com/products/qt/opensource.html ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://www.trolltech.com/products/qt/licensing.html or contact the ** sales department at sales@trolltech.com. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #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 QListWidget; fileList->setEnabled(false); connectButton = new QPushButton(tr("Connect")); connectButton->setDefault(true); downloadButton = new QPushButton(tr("Download")); downloadButton->setEnabled(false); cdToParentButton = new QPushButton; cdToParentButton->setIcon(QPixmap(":/images/cdtoparent.png")); cdToParentButton->setEnabled(false); quitButton = new QPushButton(tr("Quit")); progressDialog = new QProgressDialog(this); connect(fileList, SIGNAL(itemDoubleClicked(QListWidgetItem *)), this, SLOT(processItem(QListWidgetItem *))); connect(fileList, SIGNAL(itemSelectionChanged()), 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); QHBoxLayout *buttonLayout = new QHBoxLayout; buttonLayout->addStretch(1); buttonLayout->addWidget(downloadButton); buttonLayout->addWidget(quitButton); QVBoxLayout *mainLayout = new QVBoxLayout; mainLayout->addLayout(topLayout); mainLayout->addWidget(fileList); mainLayout->addWidget(statusLabel); mainLayout->addLayout(buttonLayout); setLayout(mainLayout); setWindowTitle(tr("FTP")); } void FtpWindow::connectOrDisconnect() { if (ftp) { ftp->abort(); ftp->deleteLater(); fileList->setEnabled(false); downloadButton->setEnabled(false); connectButton->setText(tr("Connect")); return; } QApplication::setOverrideCursor(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))); ftp->connectToHost(ftpServerLineEdit->text()); ftp->login(); ftp->list(); fileList->setEnabled(true); connectButton->setText(tr("Disconnect")); statusLabel->setText(tr("Connecting to FTP server %1...") .arg(ftpServerLineEdit->text())); } void FtpWindow::downloadFile() { QString fileName = fileList->currentItem()->text(); 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(), file); progressDialog->setLabelText(tr("Downloading %1...").arg(fileName)); progressDialog->show(); downloadButton->setEnabled(false); } void FtpWindow::cancelDownload() { ftp->abort(); } void FtpWindow::ftpCommandFinished(int, bool error) { if (ftp->currentCommand() == QFtp::ConnectToHost) { if (error) { QApplication::restoreOverrideCursor(); 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())); return; } statusLabel->setText(tr("Logged onto %1.") .arg(ftpServerLineEdit->text())); fileList->setFocus(); downloadButton->setDefault(true); return; } if (ftp->currentCommand() == QFtp::Get) { QApplication::restoreOverrideCursor(); 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(); } else if (ftp->currentCommand() == QFtp::List) { QApplication::restoreOverrideCursor(); if (isDirectory.isEmpty()) { fileList->addItem(tr("<empty>")); fileList->setEnabled(false); } } } void FtpWindow::addToList(const QUrlInfo &urlInfo) { QListWidgetItem *item = new QListWidgetItem; item->setText(urlInfo.name()); QPixmap pixmap(urlInfo.isDir() ? ":/images/dir.png" : ":/images/file.png"); item->setIcon(pixmap); isDirectory[urlInfo.name()] = urlInfo.isDir(); fileList->addItem(item); if (!fileList->currentItem()) { fileList->setCurrentItem(fileList->item(0)); fileList->setEnabled(true); } } void FtpWindow::processItem(QListWidgetItem *item) { QString name = item->text(); if (isDirectory.value(name)) { fileList->clear(); isDirectory.clear(); currentPath += "/" + name; ftp->cd(name); ftp->list(); cdToParentButton->setEnabled(true); QApplication::setOverrideCursor(Qt::WaitCursor); return; } } void FtpWindow::cdToParent() { QApplication::setOverrideCursor(Qt::WaitCursor); fileList->clear(); isDirectory.clear(); currentPath = currentPath.left(currentPath.lastIndexOf('/')); if (currentPath.isEmpty()) { cdToParentButton->