131 lines
4.3 KiB
Python
131 lines
4.3 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014-2015 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
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#
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# Based on the Eric5 helpviewer,
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# Copyright (c) 2009 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
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#
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# This file is part of qutebrowser.
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#
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# qutebrowser is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# qutebrowser is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>.
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"""Special network replies.."""
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from PyQt5.QtNetwork import QNetworkReply, QNetworkRequest
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from PyQt5.QtCore import pyqtSlot, QIODevice, QByteArray, QTimer
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class FixedDataNetworkReply(QNetworkReply):
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"""QNetworkReply subclass for fixed data."""
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def __init__(self, request, fileData, mimeType, parent=None):
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"""Constructor.
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Args:
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request: reference to the request object (QNetworkRequest)
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fileData: reference to the data buffer (QByteArray)
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mimeType: for the reply (string)
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parent: reference to the parent object (QObject)
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"""
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super().__init__(parent)
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self._data = fileData
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self.setRequest(request)
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self.setUrl(request.url())
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self.setOpenMode(QIODevice.ReadOnly)
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self.setHeader(QNetworkRequest.ContentTypeHeader, mimeType)
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self.setHeader(QNetworkRequest.ContentLengthHeader,
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QByteArray.number(len(fileData)))
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self.setAttribute(QNetworkRequest.HttpStatusCodeAttribute, 200)
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self.setAttribute(QNetworkRequest.HttpReasonPhraseAttribute, 'OK')
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# For some reason, a segfault will be triggered if these lambdas aren't
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# there.
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# pylint: disable=unnecessary-lambda
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QTimer.singleShot(0, lambda: self.metaDataChanged.emit())
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QTimer.singleShot(0, lambda: self.readyRead.emit())
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QTimer.singleShot(0, lambda: self.finished.emit())
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@pyqtSlot()
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def abort(self):
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"""Abort the operation."""
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pass
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def bytesAvailable(self):
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"""Determine the bytes available for being read.
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Return:
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bytes available (int)
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"""
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return len(self._data) + super().bytesAvailable()
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def readData(self, maxlen):
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"""Retrieve data from the reply object.
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Args:
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maxlen maximum number of bytes to read (int)
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Return:
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bytestring containing the data
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"""
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len_ = min(maxlen, len(self._data))
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buf = bytes(self._data[:len_])
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self._data = self._data[len_:]
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return buf
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def isFinished(self):
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"""Check if the reply is finished."""
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return True
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class ErrorNetworkReply(QNetworkReply):
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"""QNetworkReply which always returns an error."""
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def __init__(self, req, errorstring, error, parent=None):
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"""Constructor.
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Args:
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req: The QNetworkRequest associated with this reply.
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errorstring: The error string to print.
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error: The numerical error value.
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parent: The parent to pass to QNetworkReply.
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"""
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super().__init__(parent)
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self.setRequest(req)
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self.setUrl(req.url())
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# We don't actually want to read anything, but we still need to open
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# the device to avoid getting a warning.
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self.setOpenMode(QIODevice.ReadOnly)
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self.setError(error, errorstring)
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# For some reason, a segfault will be triggered if these lambdas aren't
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# there.
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# pylint: disable=unnecessary-lambda
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QTimer.singleShot(0, lambda: self.error.emit(error))
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QTimer.singleShot(0, lambda: self.finished.emit())
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def abort(self):
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"""Do nothing since it's a fake reply."""
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pass
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def bytesAvailable(self):
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"""We always have 0 bytes available."""
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return 0
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def readData(self):
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"""No data available."""
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return bytes()
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