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# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
# Copyright 2014-2021 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with qutebrowser. If not, see <https://www.gnu.org/licenses/>.
"""QtWebEngine specific code for downloads."""
import re
import os.path
import functools
from PyQt5.QtCore import pyqtSlot, Qt, QUrl, QObject
from PyQt5.QtWebEngineWidgets import QWebEngineDownloadItem
from qutebrowser.browser import downloads, pdfjs
from qutebrowser.utils import (debug, usertypes, message, log, objreg, urlutils,
utils, version)
class DownloadItem(downloads.AbstractDownloadItem):
"""A wrapper over a QWebEngineDownloadItem.
Attributes:
_qt_item: The wrapped item.
"""
def __init__(self, qt_item: QWebEngineDownloadItem,
manager: downloads.AbstractDownloadManager,
parent: QObject = None) -> None:
super().__init__(manager=manager, parent=manager)
self._qt_item = qt_item
qt_item.downloadProgress.connect( # type: ignore[attr-defined]
self.stats.on_download_progress)
qt_item.stateChanged.connect( # type: ignore[attr-defined]
self._on_state_changed)
# Ensure wrapped qt_item is deleted manually when the wrapper object
# is deleted. See https://github.com/qutebrowser/qutebrowser/issues/3373
self.destroyed.connect(self._qt_item.deleteLater)
def _is_page_download(self):
"""Check if this item is a page (i.e. mhtml) download."""
return (self._qt_item.savePageFormat() !=
QWebEngineDownloadItem.UnknownSaveFormat)
@pyqtSlot(QWebEngineDownloadItem.DownloadState)
def _on_state_changed(self, state):
state_name = debug.qenum_key(QWebEngineDownloadItem, state)
log.downloads.debug("State for {!r} changed to {}".format(
self, state_name))
if state == QWebEngineDownloadItem.DownloadRequested:
pass
elif state == QWebEngineDownloadItem.DownloadInProgress:
pass
elif state == QWebEngineDownloadItem.DownloadCompleted:
log.downloads.debug("Download {} finished".format(self.basename))
if self._is_page_download():
# Same logging as QtWebKit mhtml downloads.
log.downloads.debug("File successfully written.")
self.successful = True
self.done = True
self.finished.emit()
self.stats.finish()
elif state == QWebEngineDownloadItem.DownloadCancelled:
self.successful = False
self.done = True
self.cancelled.emit()
self.stats.finish()
elif state == QWebEngineDownloadItem.DownloadInterrupted:
self.successful = False
reason = self._qt_item.interruptReasonString()
self._die(reason)
else:
raise ValueError("_on_state_changed was called with unknown state "
"{}".format(state_name))
def _do_die(self):
progress_signal = self._qt_item.downloadProgress
progress_signal.disconnect() # type: ignore[attr-defined]
if self._qt_item.state() != QWebEngineDownloadItem.DownloadInterrupted:
self._qt_item.cancel()
def _do_cancel(self):
state = self._qt_item.state()
state_name = debug.qenum_key(QWebEngineDownloadItem, state)
assert state not in [QWebEngineDownloadItem.DownloadCompleted,
QWebEngineDownloadItem.DownloadCancelled], state_name
self._qt_item.cancel()
def retry(self):
state = self._qt_item.state()
if state != QWebEngineDownloadItem.DownloadInterrupted:
log.downloads.warning(
"Refusing to retry download in state {}".format(
debug.qenum_key(QWebEngineDownloadItem, state)))
return
self._qt_item.resume()
def _get_open_filename(self):
return self._filename
def url(self) -> QUrl:
return self._qt_item.url()
def origin(self) -> QUrl:
page = self._qt_item.page()
return page.url() if page else QUrl()
def _set_fileobj(self, fileobj, *, autoclose=True):
raise downloads.UnsupportedOperationError
def _set_tempfile(self, fileobj):
fileobj.close()
self._set_filename(fileobj.name, force_overwrite=True,
remember_directory=False)
def _ensure_can_set_filename(self, filename):
state = self._qt_item.state()
if state != QWebEngineDownloadItem.DownloadRequested:
state_name = debug.qenum_key(QWebEngineDownloadItem, state)
raise ValueError("Trying to set filename {} on {!r} which is "
"state {} (not in requested state)!".format(
filename, self, state_name))
def _ask_confirm_question(self, title, msg, *, custom_yes_action=None):
yes_action = custom_yes_action or self._after_set_filename
no_action = functools.partial(self.cancel, remove_data=False)
question = usertypes.Question()
question.title = title
question.text = msg
question.url = 'file://{}'.format(self._filename)
question.mode = usertypes.PromptMode.yesno
question.answered_yes.connect(yes_action)
question.answered_no.connect(no_action)
question.cancelled.connect(no_action)
self.cancelled.connect(question.abort)
self.error.connect(question.abort)
message.global_bridge.ask(question, blocking=True)
def _ask_create_parent_question(self, title, msg,
force_overwrite, remember_directory):
assert self._filename is not None
no_action = functools.partial(self.cancel, remove_data=False)
question = usertypes.Question()
question.title = title
question.text = msg
question.url = 'file://{}'.format(os.path.dirname(self._filename))
question.mode = usertypes.PromptMode.yesno
question.answered_yes.connect(lambda:
self._after_create_parent_question(
force_overwrite, remember_directory))
question.answered_no.connect(no_action)
question.cancelled.connect(no_action)
self.cancelled.connect(question.abort)
self.error.connect(question.abort)
message.global_bridge.ask(question, blocking=True)
def _after_set_filename(self):
assert self._filename is not None
dirname, basename = os.path.split(self._filename)
try:
# Qt 5.14
self._qt_item.setDownloadDirectory(dirname)
self._qt_item.setDownloadFileName(basename)
except AttributeError:
self._qt_item.setPath(self._filename)
self._qt_item.accept()
def _get_conflicting_download(self):
"""Return another potential active download with the same name.
webenginedownloads.DownloadItem needs to look for downloads both in its
manager and in qtnetwork-download-manager as both are used
simultaneously.
This method can be safely removed once #2328 is fixed.
"""
conflicting_download = super()._get_conflicting_download()
if conflicting_download:
return conflicting_download
qtnetwork_download_manager = objreg.get(
'qtnetwork-download-manager')
for download in qtnetwork_download_manager.downloads:
if self._conflicts_with(download):
return download
return None
def _strip_suffix(filename):
"""Convert a path we got from chromium to a suggested filename.
Chromium thinks we want to download stuff to ~/Download, so even if we
don't, we get downloads with a suffix like (1) for files existing there.
We simply strip the suffix off via regex.
See https://bugreports.qt.io/browse/QTBUG-56978
"""
suffix_re = re.compile(r"""
\ ? # Optional space between filename and suffix
(
# Numerical suffix
\([0-9]+\)
|
# ISO-8601 suffix
# https://cs.chromium.org/chromium/src/base/time/time_to_iso8601.cc
\ -\ \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z
)
(?=\.|$) # Begin of extension, or filename without extension
""", re.VERBOSE)
return suffix_re.sub('', filename)
class DownloadManager(downloads.AbstractDownloadManager):
"""Manager for currently running downloads.
Attributes:
_mhtml_target: DownloadTarget for the next MHTML download.
"""
def __init__(self, parent=None):
super().__init__(parent)
self._mhtml_target = None
def install(self, profile):
"""Set up the download manager on a QWebEngineProfile."""
profile.downloadRequested.connect(self.handle_download,
Qt.DirectConnection)
@pyqtSlot(QWebEngineDownloadItem)
def handle_download(self, qt_item):
"""Start a download coming from a QWebEngineProfile."""
qt_filename = os.path.basename(qt_item.path()) # FIXME use 5.14 API
mime_type = qt_item.mimeType()
url = qt_item.url()
# WORKAROUND for https://bugreports.qt.io/browse/QTBUG-90355
if version.qtwebengine_versions().webengine >= utils.VersionNumber(5, 15, 3):
needs_workaround = False
elif url.scheme().lower() == 'data':
if '/' in url.path().split(',')[-1]: # e.g. a slash in base64
wrong_filename = url.path().split('/')[-1]
else:
wrong_filename = mime_type.split('/')[1]
needs_workaround = qt_filename == wrong_filename
else:
needs_workaround = False
if needs_workaround:
suggested_filename = urlutils.filename_from_url(
url, fallback='qutebrowser-download')
else:
suggested_filename = _strip_suffix(qt_filename)
use_pdfjs = pdfjs.should_use_pdfjs(mime_type, url)
download = DownloadItem(qt_item, manager=self)
self._init_item(download, auto_remove=use_pdfjs,
suggested_filename=suggested_filename)
if self._mhtml_target is not None:
download.set_target(self._mhtml_target)
self._mhtml_target = None
return
if use_pdfjs:
download.set_target(downloads.PDFJSDownloadTarget())
return
filename = downloads.immediate_download_path()
if filename is not None:
# User doesn't want to be asked, so just use the download_dir
target = downloads.FileDownloadTarget(filename)
download.set_target(target)
return
if download.cancel_for_origin():
return
# Ask the user for a filename - needs to be blocking!
question = downloads.get_filename_question(
suggested_filename=suggested_filename, url=qt_item.url(),
parent=self)
self._init_filename_question(question, download)
message.global_bridge.ask(question, blocking=True)
# The filename is set via the question.answered signal, connected in
# _init_filename_question.
def get_mhtml(self, tab, target):
"""Download the given tab as mhtml to the given target."""
assert tab.backend == usertypes.Backend.QtWebEngine
assert self._mhtml_target is None, self._mhtml_target
self._mhtml_target = target
tab.action.save_page()
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