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# Copyright 2018-2021 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# SPDX-License-Identifier: GPL-3.0-or-later
"""APIs related to downloading files."""
import io
from qutebrowser.qt.core import QObject, pyqtSignal, pyqtSlot, QUrl
from qutebrowser.browser import downloads, qtnetworkdownloads
from qutebrowser.utils import objreg
UnsupportedAttribute = downloads.UnsupportedAttribute
class TempDownload(QObject):
"""A download of some data into a file object."""
finished = pyqtSignal()
def __init__(self, item: qtnetworkdownloads.DownloadItem) -> None:
super().__init__()
self._item = item
self._item.finished.connect(self._on_download_finished)
self.successful = False
self.fileobj = item.fileobj
@pyqtSlot()
def _on_download_finished(self) -> None:
self.successful = self._item.successful
self.finished.emit()
def download_temp(url: QUrl) -> TempDownload:
"""Download the given URL into a file object.
The download is not saved to disk.
Returns a ``TempDownload`` object, which triggers a ``finished`` signal
when the download has finished::
dl = downloads.download_temp(QUrl("https://www.example.com/"))
dl.finished.connect(functools.partial(on_download_finished, dl))
After the download has finished, its ``successful`` attribute can be
checked to make sure it finished successfully. If so, its contents can be
read by accessing the ``fileobj`` attribute::
def on_download_finished(download: downloads.TempDownload) -> None:
if download.successful:
print(download.fileobj.read())
download.fileobj.close()
"""
fobj = io.BytesIO()
fobj.name = 'temporary: ' + url.host()
target = downloads.FileObjDownloadTarget(fobj)
download_manager = objreg.get('qtnetwork-download-manager')
# cache=False is set as a WORKAROUND for MS Defender thinking we're a trojan
# downloader when caching the hostblock list...
return download_manager.get(url, target=target, auto_remove=True, cache=False)
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