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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/>.
"""An HTTP client based on QNetworkAccessManager."""
import functools
import urllib.parse
from typing import MutableMapping
from qutebrowser.utils import log
from qutebrowser.qt import QtNetwork, QtCore
class HTTPRequest(QtNetwork.QNetworkRequest):
"""A QNetworkRquest that follows (secure) redirects by default."""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setAttribute(QtNetwork.QNetworkRequest.RedirectPolicyAttribute,
QtNetwork.QNetworkRequest.NoLessSafeRedirectPolicy)
class HTTPClient(QtCore.QObject):
"""An HTTP client based on QNetworkAccessManager.
Intended for APIs, automatically decodes data.
Attributes:
_nam: The QNetworkAccessManager used.
_timers: A {QNetworkReply: QTimer} dict.
Signals:
success: Emitted when the operation succeeded.
arg: The received data.
error: Emitted when the request failed.
arg: The error message, as string.
"""
success = QtCore.pyqtSignal(str)
error = QtCore.pyqtSignal(str)
def __init__(self, parent=None):
super().__init__(parent)
with log.disable_qt_msghandler():
# WORKAROUND for a hang when messages are printed, see our
# NetworkAccessManager subclass for details.
self._nam = QtNetwork.QNetworkAccessManager(self)
self._timers: MutableMapping[QtNetwork.QNetworkReply, QtCore.QTimer] = {}
def post(self, url, data=None):
"""Create a new POST request.
Args:
url: The URL to post to, as QUrl.
data: A dict of data to send.
"""
if data is None:
data = {}
encoded_data = urllib.parse.urlencode(data).encode('utf-8')
request = HTTPRequest(url)
request.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
'application/x-www-form-urlencoded;charset=utf-8')
reply = self._nam.post(request, encoded_data)
self._handle_reply(reply)
def get(self, url):
"""Create a new GET request.
Emits success/error when done.
Args:
url: The URL to access, as QUrl.
"""
request = HTTPRequest(url)
reply = self._nam.get(request)
self._handle_reply(reply)
def _handle_reply(self, reply):
"""Handle a new QNetworkReply."""
if reply.isFinished():
self.on_reply_finished(reply)
else:
timer = QtCore.QTimer(self)
timer.setInterval(10000)
timer.timeout.connect(reply.abort)
timer.start()
self._timers[reply] = timer
reply.finished.connect(functools.partial(
self.on_reply_finished, reply))
def on_reply_finished(self, reply):
"""Read the data and finish when the reply finished.
Args:
reply: The QNetworkReply which finished.
"""
timer = self._timers.pop(reply)
if timer is not None:
timer.stop()
timer.deleteLater()
if reply.error() != QtNetwork.QNetworkReply.NoError:
self.error.emit(reply.errorString())
return
try:
data = bytes(reply.readAll()).decode('utf-8')
except UnicodeDecodeError:
self.error.emit("Invalid UTF-8 data received in reply!")
return
self.success.emit(data)
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