--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebBrowser/Download/DownloadItem.py Tue Feb 23 20:00:40 2016 +0100
@@ -0,0 +1,721 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2010 - 2016 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a widget controlling a download.
+"""
+
+from __future__ import unicode_literals
+try:
+ str = unicode
+except NameError:
+ pass
+
+from PyQt5.QtCore import pyqtSlot, pyqtSignal, Qt, QTime, QFile, QFileInfo, \
+ QUrl, QIODevice, QCryptographicHash, PYQT_VERSION_STR
+from PyQt5.QtGui import QPalette, QDesktopServices
+from PyQt5.QtWidgets import QWidget, QStyle, QDialog
+from PyQt5.QtNetwork import QNetworkRequest, QNetworkReply
+
+from E5Gui import E5FileDialog
+
+from .Ui_DownloadItem import Ui_DownloadItem
+
+from .DownloadUtilities import timeString, dataString
+##from ..HelpUtilities import parseContentDisposition
+
+import UI.PixmapCache
+import Preferences
+
+
+class DownloadItem(QWidget, Ui_DownloadItem):
+ """
+ Class implementing a widget controlling a download.
+
+ @signal statusChanged() emitted upon a status change of a download
+ @signal downloadFinished() emitted when a download finished
+ @signal progress(int, int) emitted to signal the download progress
+ """
+ statusChanged = pyqtSignal()
+ downloadFinished = pyqtSignal()
+ progress = pyqtSignal(int, int)
+
+ Downloading = 0
+ DownloadSuccessful = 1
+ DownloadCancelled = 2
+
+ def __init__(self, reply=None, requestFilename=False, webPage=None,
+ download=False, parent=None, mainWindow=None):
+ """
+ Constructor
+
+ @keyparam reply reference to the network reply object (QNetworkReply)
+ @keyparam requestFilename flag indicating to ask the user for a
+ filename (boolean)
+ @keyparam webPage reference to the web page object the download
+ originated from (QWebPage)
+ @keyparam download flag indicating a download operation (boolean)
+ @keyparam parent reference to the parent widget (QWidget)
+ @keyparam mainWindow reference to the main window (HelpWindow)
+ """
+ super(DownloadItem, self).__init__(parent)
+ self.setupUi(self)
+
+ p = self.infoLabel.palette()
+ p.setColor(QPalette.Text, Qt.darkGray)
+ self.infoLabel.setPalette(p)
+
+ self.progressBar.setMaximum(0)
+
+ self.__isFtpDownload = reply is not None and \
+ reply.url().scheme() == "ftp"
+
+ self.tryAgainButton.setIcon(UI.PixmapCache.getIcon("restart.png"))
+ self.tryAgainButton.setEnabled(False)
+ self.tryAgainButton.setVisible(False)
+ self.stopButton.setIcon(UI.PixmapCache.getIcon("stopLoading.png"))
+ self.pauseButton.setIcon(UI.PixmapCache.getIcon("pause.png"))
+ self.openButton.setIcon(UI.PixmapCache.getIcon("open.png"))
+ self.openButton.setEnabled(False)
+ self.openButton.setVisible(False)
+ if self.__isFtpDownload:
+ self.stopButton.setEnabled(False)
+ self.stopButton.setVisible(False)
+ self.pauseButton.setEnabled(False)
+ self.pauseButton.setVisible(False)
+
+ self.__state = DownloadItem.Downloading
+
+ icon = self.style().standardIcon(QStyle.SP_FileIcon)
+ self.fileIcon.setPixmap(icon.pixmap(48, 48))
+
+ self.__mainWindow = mainWindow
+ self.__reply = reply
+ self.__requestFilename = requestFilename
+ self.__page = webPage
+ self.__pageUrl = webPage and webPage.mainFrame().url() or QUrl()
+ self.__toDownload = download
+ self.__bytesReceived = 0
+ self.__bytesTotal = -1
+ self.__downloadTime = QTime()
+ self.__output = QFile()
+ self.__fileName = ""
+ self.__originalFileName = ""
+ self.__startedSaving = False
+ self.__finishedDownloading = False
+ self.__gettingFileName = False
+ self.__canceledFileSelect = False
+ self.__autoOpen = False
+
+ self.__sha1Hash = QCryptographicHash(QCryptographicHash.Sha1)
+ self.__md5Hash = QCryptographicHash(QCryptographicHash.Md5)
+
+ if not requestFilename:
+ self.__requestFilename = \
+ Preferences.getUI("RequestDownloadFilename")
+
+ self.__initialize()
+
+ def __initialize(self, tryAgain=False):
+ """
+ Private method to (re)initialize the widget.
+
+ @param tryAgain flag indicating a retry (boolean)
+ """
+ if self.__reply is None:
+ return
+
+ self.__startedSaving = False
+ self.__finishedDownloading = False
+ self.__bytesReceived = 0
+ self.__bytesTotal = -1
+
+ self.__sha1Hash.reset()
+ self.__md5Hash.reset()
+
+ # start timer for the download estimation
+ self.__downloadTime.start()
+
+ # attach to the reply object
+ self.__url = self.__reply.url()
+ self.__reply.setParent(self)
+ self.__reply.setReadBufferSize(16 * 1024 * 1024)
+ self.__reply.readyRead.connect(self.__readyRead)
+ self.__reply.error.connect(self.__networkError)
+ self.__reply.downloadProgress.connect(self.__downloadProgress)
+ self.__reply.metaDataChanged.connect(self.__metaDataChanged)
+ self.__reply.finished.connect(self.__finished)
+
+ # reset info
+ self.infoLabel.clear()
+ self.progressBar.setValue(0)
+ self.__getFileName()
+
+ if self.__reply.error() != QNetworkReply.NoError:
+ self.__networkError()
+ self.__finished()
+
+ def __getFileName(self):
+ """
+ Private method to get the file name to save to from the user.
+ """
+ if self.__gettingFileName:
+ return
+
+ from WebBrowser.WebBrowserWindow import WebBrowserWindow
+ downloadDirectory = WebBrowserWindow\
+ .downloadManager().downloadDirectory()
+
+ if self.__fileName:
+ fileName = self.__fileName
+ originalFileName = self.__originalFileName
+ self.__toDownload = True
+ ask = False
+ else:
+ defaultFileName, originalFileName = \
+ self.__saveFileName(downloadDirectory)
+ fileName = defaultFileName
+ self.__originalFileName = originalFileName
+ ask = True
+ self.__autoOpen = False
+ if not self.__toDownload:
+ from .DownloadAskActionDialog import DownloadAskActionDialog
+ url = self.__reply.url()
+ dlg = DownloadAskActionDialog(
+ QFileInfo(originalFileName).fileName(),
+ self.__reply.header(QNetworkRequest.ContentTypeHeader),
+ "{0}://{1}".format(url.scheme(), url.authority()),
+ self)
+ if dlg.exec_() == QDialog.Rejected or dlg.getAction() == "cancel":
+ self.progressBar.setVisible(False)
+ self.__reply.close()
+ self.on_stopButton_clicked()
+ self.filenameLabel.setText(
+ self.tr("Download canceled: {0}").format(
+ QFileInfo(defaultFileName).fileName()))
+ self.__canceledFileSelect = True
+ return
+
+ if dlg.getAction() == "scan":
+ self.__mainWindow.requestVirusTotalScan(url)
+
+ self.progressBar.setVisible(False)
+ self.__reply.close()
+ self.on_stopButton_clicked()
+ self.filenameLabel.setText(
+ self.tr("VirusTotal scan scheduled: {0}").format(
+ QFileInfo(defaultFileName).fileName()))
+ self.__canceledFileSelect = True
+ return
+
+ self.__autoOpen = dlg.getAction() == "open"
+ if PYQT_VERSION_STR >= "5.0.0":
+ from PyQt5.QtCore import QStandardPaths
+ tempLocation = QStandardPaths.storageLocation(
+ QStandardPaths.TempLocation)
+ else:
+ from PyQt5.QtGui import QDesktopServices
+ tempLocation = QDesktopServices.storageLocation(
+ QDesktopServices.TempLocation)
+ fileName = tempLocation + '/' + \
+ QFileInfo(fileName).completeBaseName()
+
+ if ask and not self.__autoOpen and self.__requestFilename:
+ self.__gettingFileName = True
+ fileName = E5FileDialog.getSaveFileName(
+ None,
+ self.tr("Save File"),
+ defaultFileName,
+ "")
+ self.__gettingFileName = False
+ if not fileName:
+ self.progressBar.setVisible(False)
+ self.__reply.close()
+ self.on_stopButton_clicked()
+ self.filenameLabel.setText(
+ self.tr("Download canceled: {0}")
+ .format(QFileInfo(defaultFileName).fileName()))
+ self.__canceledFileSelect = True
+ return
+
+ fileInfo = QFileInfo(fileName)
+ WebBrowserWindow.downloadManager()\
+ .setDownloadDirectory(fileInfo.absoluteDir().absolutePath())
+ self.filenameLabel.setText(fileInfo.fileName())
+
+ self.__output.setFileName(fileName + ".part")
+ self.__fileName = fileName
+
+ # check file path for saving
+ saveDirPath = QFileInfo(self.__fileName).dir()
+ if not saveDirPath.exists():
+ if not saveDirPath.mkpath(saveDirPath.absolutePath()):
+ self.progressBar.setVisible(False)
+ self.on_stopButton_clicked()
+ self.infoLabel.setText(self.tr(
+ "Download directory ({0}) couldn't be created.")
+ .format(saveDirPath.absolutePath()))
+ return
+
+ self.filenameLabel.setText(QFileInfo(self.__fileName).fileName())
+ if self.__requestFilename:
+ self.__readyRead()
+
+ def __saveFileName(self, directory):
+ """
+ Private method to calculate a name for the file to download.
+
+ @param directory name of the directory to store the file into (string)
+ @return proposed filename and original filename (string, string)
+ """
+ path = parseContentDisposition(self.__reply)
+ info = QFileInfo(path)
+ baseName = info.completeBaseName()
+ endName = info.suffix()
+
+ origName = baseName
+ if endName:
+ origName += '.' + endName
+
+ name = directory + baseName
+ if endName:
+ name += '.' + endName
+ if not self.__requestFilename:
+ # do not overwrite, if the user is not being asked
+ i = 1
+ while QFile.exists(name):
+ # file exists already, don't overwrite
+ name = directory + baseName + ('-{0:d}'.format(i))
+ if endName:
+ name += '.' + endName
+ i += 1
+ return name, origName
+
+ def __open(self):
+ """
+ Private slot to open the downloaded file.
+ """
+ info = QFileInfo(self.__output)
+ url = QUrl.fromLocalFile(info.absoluteFilePath())
+ QDesktopServices.openUrl(url)
+
+ @pyqtSlot()
+ def on_tryAgainButton_clicked(self):
+ """
+ Private slot to retry the download.
+ """
+ self.retry()
+
+ def retry(self):
+ """
+ Public slot to retry the download.
+ """
+ if not self.tryAgainButton.isEnabled():
+ return
+
+ self.tryAgainButton.setEnabled(False)
+ self.tryAgainButton.setVisible(False)
+ self.openButton.setEnabled(False)
+ self.openButton.setVisible(False)
+ if not self.__isFtpDownload:
+ self.stopButton.setEnabled(True)
+ self.stopButton.setVisible(True)
+ self.pauseButton.setEnabled(True)
+ self.pauseButton.setVisible(True)
+ self.progressBar.setVisible(True)
+
+ if self.__page:
+ nam = self.__page.networkAccessManager()
+ else:
+ from WebBrowser.WebBrowserWindow import WebBrowserWindow
+ nam = WebBrowserWindow.networkAccessManager()
+ reply = nam.get(QNetworkRequest(self.__url))
+ if self.__output.exists():
+ self.__output.remove()
+ self.__output = QFile()
+ self.__reply = reply
+ self.__initialize(tryAgain=True)
+ self.__state = DownloadItem.Downloading
+ self.statusChanged.emit()
+
+ @pyqtSlot(bool)
+ def on_pauseButton_clicked(self, checked):
+ """
+ Private slot to pause the download.
+
+ @param checked flag indicating the state of the button (boolean)
+ """
+ if checked:
+ self.__reply.readyRead.disconnect(self.__readyRead)
+ self.__reply.setReadBufferSize(16 * 1024)
+ else:
+ self.__reply.readyRead.connect(self.__readyRead)
+ self.__reply.setReadBufferSize(16 * 1024 * 1024)
+ self.__readyRead()
+
+ @pyqtSlot()
+ def on_stopButton_clicked(self):
+ """
+ Private slot to stop the download.
+ """
+ self.cancelDownload()
+
+ def cancelDownload(self):
+ """
+ Public slot to stop the download.
+ """
+ self.setUpdatesEnabled(False)
+ if not self.__isFtpDownload:
+ self.stopButton.setEnabled(False)
+ self.stopButton.setVisible(False)
+ self.pauseButton.setEnabled(False)
+ self.pauseButton.setVisible(False)
+ self.tryAgainButton.setEnabled(True)
+ self.tryAgainButton.setVisible(True)
+ self.openButton.setEnabled(False)
+ self.openButton.setVisible(False)
+ self.setUpdatesEnabled(True)
+ self.__state = DownloadItem.DownloadCancelled
+ self.__reply.abort()
+ self.downloadFinished.emit()
+
+ @pyqtSlot()
+ def on_openButton_clicked(self):
+ """
+ Private slot to open the downloaded file.
+ """
+ self.openFile()
+
+ def openFile(self):
+ """
+ Public slot to open the downloaded file.
+ """
+ info = QFileInfo(self.__fileName)
+ url = QUrl.fromLocalFile(info.absoluteFilePath())
+ QDesktopServices.openUrl(url)
+
+ def openFolder(self):
+ """
+ Public slot to open the folder containing the downloaded file.
+ """
+ info = QFileInfo(self.__fileName)
+ url = QUrl.fromLocalFile(info.absolutePath())
+ QDesktopServices.openUrl(url)
+
+ def __readyRead(self):
+ """
+ Private slot to read the available data.
+ """
+ if self.__requestFilename and not self.__output.fileName():
+ return
+
+ if not self.__output.isOpen():
+ # in case someone else has already put a file there
+ if not self.__requestFilename:
+ self.__getFileName()
+ if not self.__output.open(QIODevice.WriteOnly):
+ self.infoLabel.setText(
+ self.tr("Error opening save file: {0}")
+ .format(self.__output.errorString()))
+ self.on_stopButton_clicked()
+ self.statusChanged.emit()
+ return
+ self.statusChanged.emit()
+
+ buffer = self.__reply.readAll()
+ self.__sha1Hash.addData(buffer)
+ self.__md5Hash.addData(buffer)
+ bytesWritten = self.__output.write(buffer)
+ if bytesWritten == -1:
+ self.infoLabel.setText(
+ self.tr("Error saving: {0}")
+ .format(self.__output.errorString()))
+ self.on_stopButton_clicked()
+ else:
+ self.__startedSaving = True
+ if self.__finishedDownloading:
+ self.__finished()
+
+ def __networkError(self):
+ """
+ Private slot to handle a network error.
+ """
+ self.infoLabel.setText(
+ self.tr("Network Error: {0}")
+ .format(self.__reply.errorString()))
+ self.tryAgainButton.setEnabled(True)
+ self.tryAgainButton.setVisible(True)
+ self.downloadFinished.emit()
+
+ def __metaDataChanged(self):
+ """
+ Private slot to handle a change of the meta data.
+ """
+ locationHeader = self.__reply.header(QNetworkRequest.LocationHeader)
+ if locationHeader and locationHeader.isValid():
+ self.__url = QUrl(locationHeader)
+ from WebBrowser.WebBrowserWindow import WebBrowserWindow
+ self.__reply = WebBrowserWindow\
+ .networkAccessManager().get(QNetworkRequest(self.__url))
+ self.__initialize()
+
+ def __downloadProgress(self, bytesReceived, bytesTotal):
+ """
+ Private method to show the download progress.
+
+ @param bytesReceived number of bytes received (integer)
+ @param bytesTotal number of total bytes (integer)
+ """
+ self.__bytesReceived = bytesReceived
+ self.__bytesTotal = bytesTotal
+ currentValue = 0
+ totalValue = 0
+ if bytesTotal > 0:
+ currentValue = bytesReceived * 100 / bytesTotal
+ totalValue = 100
+ self.progressBar.setValue(currentValue)
+ self.progressBar.setMaximum(totalValue)
+
+ self.progress.emit(currentValue, totalValue)
+ self.__updateInfoLabel()
+
+ def bytesTotal(self):
+ """
+ Public method to get the total number of bytes of the download.
+
+ @return total number of bytes (integer)
+ """
+ if self.__bytesTotal == -1:
+ self.__bytesTotal = self.__reply.header(
+ QNetworkRequest.ContentLengthHeader)
+ if self.__bytesTotal is None:
+ self.__bytesTotal = -1
+ return self.__bytesTotal
+
+ def bytesReceived(self):
+ """
+ Public method to get the number of bytes received.
+
+ @return number of bytes received (integer)
+ """
+ return self.__bytesReceived
+
+ def remainingTime(self):
+ """
+ Public method to get an estimation for the remaining time.
+
+ @return estimation for the remaining time (float)
+ """
+ if not self.downloading():
+ return -1.0
+
+ if self.bytesTotal() == -1:
+ return -1.0
+
+ cSpeed = self.currentSpeed()
+ if cSpeed != 0:
+ timeRemaining = (self.bytesTotal() - self.bytesReceived()) / cSpeed
+ else:
+ timeRemaining = 1
+
+ # ETA should never be 0
+ if timeRemaining == 0:
+ timeRemaining = 1
+
+ return timeRemaining
+
+ def currentSpeed(self):
+ """
+ Public method to get an estimation for the download speed.
+
+ @return estimation for the download speed (float)
+ """
+ if not self.downloading():
+ return -1.0
+
+ return self.__bytesReceived * 1000.0 / self.__downloadTime.elapsed()
+
+ def __updateInfoLabel(self):
+ """
+ Private method to update the info label.
+ """
+ if self.__reply.error() != QNetworkReply.NoError:
+ return
+
+ bytesTotal = self.bytesTotal()
+ running = not self.downloadedSuccessfully()
+
+ speed = self.currentSpeed()
+ timeRemaining = self.remainingTime()
+
+ info = ""
+ if running:
+ remaining = ""
+
+ if bytesTotal > 0:
+ remaining = timeString(timeRemaining)
+
+ info = self.tr("{0} of {1} ({2}/sec)\n{3}")\
+ .format(
+ dataString(self.__bytesReceived),
+ bytesTotal == -1 and self.tr("?")
+ or dataString(bytesTotal),
+ dataString(int(speed)),
+ remaining)
+ else:
+ if self.__bytesReceived == bytesTotal or bytesTotal == -1:
+ info = self.tr("{0} downloaded\nSHA1: {1}\nMD5: {2}")\
+ .format(dataString(self.__output.size()),
+ str(self.__sha1Hash.result().toHex(),
+ encoding="ascii"),
+ str(self.__md5Hash.result().toHex(),
+ encoding="ascii")
+ )
+ else:
+ info = self.tr("{0} of {1} - Stopped")\
+ .format(dataString(self.__bytesReceived),
+ dataString(bytesTotal))
+ self.infoLabel.setText(info)
+
+ def downloading(self):
+ """
+ Public method to determine, if a download is in progress.
+
+ @return flag indicating a download is in progress (boolean)
+ """
+ return self.__state == DownloadItem.Downloading
+
+ def downloadedSuccessfully(self):
+ """
+ Public method to check for a successful download.
+
+ @return flag indicating a successful download (boolean)
+ """
+ return self.__state == DownloadItem.DownloadSuccessful
+
+ def downloadCanceled(self):
+ """
+ Public method to check, if the download was cancelled.
+
+ @return flag indicating a canceled download (boolean)
+ """
+ return self.__state == DownloadItem.DownloadCancelled
+
+ def __finished(self):
+ """
+ Private slot to handle the download finished.
+ """
+ self.__finishedDownloading = True
+ if not self.__startedSaving:
+ return
+
+ noError = self.__reply.error() == QNetworkReply.NoError
+
+ self.progressBar.setVisible(False)
+ if not self.__isFtpDownload:
+ self.stopButton.setEnabled(False)
+ self.stopButton.setVisible(False)
+ self.pauseButton.setEnabled(False)
+ self.pauseButton.setVisible(False)
+ self.openButton.setEnabled(noError)
+ self.openButton.setVisible(noError)
+ self.__output.close()
+ if QFile.exists(self.__fileName):
+ QFile.remove(self.__fileName)
+ self.__output.rename(self.__fileName)
+ self.__updateInfoLabel()
+ self.__state = DownloadItem.DownloadSuccessful
+ self.statusChanged.emit()
+ self.downloadFinished.emit()
+
+ if self.__autoOpen:
+ self.__open()
+
+ def canceledFileSelect(self):
+ """
+ Public method to check, if the user canceled the file selection.
+
+ @return flag indicating cancellation (boolean)
+ """
+ return self.__canceledFileSelect
+
+ def setIcon(self, icon):
+ """
+ Public method to set the download icon.
+
+ @param icon reference to the icon to be set (QIcon)
+ """
+ self.fileIcon.setPixmap(icon.pixmap(48, 48))
+
+ def fileName(self):
+ """
+ Public method to get the name of the output file.
+
+ @return name of the output file (string)
+ """
+ return self.__fileName
+
+ def absoluteFilePath(self):
+ """
+ Public method to get the absolute path of the output file.
+
+ @return absolute path of the output file (string)
+ """
+ return QFileInfo(self.__fileName).absoluteFilePath()
+
+ def getData(self):
+ """
+ Public method to get the relevant download data.
+
+ @return tuple of URL, save location, flag and the
+ URL of the related web page (QUrl, string, boolean,QUrl)
+ """
+ return (self.__url, QFileInfo(self.__fileName).filePath(),
+ self.downloadedSuccessfully(), self.__pageUrl)
+
+ def setData(self, data):
+ """
+ Public method to set the relevant download data.
+
+ @param data tuple of URL, save location, flag and the
+ URL of the related web page (QUrl, string, boolean, QUrl)
+ """
+ self.__url = data[0]
+ self.__fileName = data[1]
+ self.__pageUrl = data[3]
+ self.__isFtpDownload = self.__url.scheme() == "ftp"
+
+ self.filenameLabel.setText(QFileInfo(self.__fileName).fileName())
+ self.infoLabel.setText(self.__fileName)
+
+ self.stopButton.setEnabled(False)
+ self.stopButton.setVisible(False)
+ self.pauseButton.setEnabled(False)
+ self.pauseButton.setVisible(False)
+ self.openButton.setEnabled(data[2])
+ self.openButton.setVisible(data[2])
+ self.tryAgainButton.setEnabled(not data[2])
+ self.tryAgainButton.setVisible(not data[2])
+ if data[2]:
+ self.__state = DownloadItem.DownloadSuccessful
+ else:
+ self.__state = DownloadItem.DownloadCancelled
+ self.progressBar.setVisible(False)
+
+ def getInfoData(self):
+ """
+ Public method to get the text of the info label.
+
+ @return text of the info label (string)
+ """
+ return self.infoLabel.text()
+
+ def getPageUrl(self):
+ """
+ Public method to get the URL of the download page.
+
+ @return URL of the download page (QUrl)
+ """
+ return self.__pageUrl
