98 lines
4.1 KiB
Python
98 lines
4.1 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2016-2018 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
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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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"""A request interceptor taking care of adblocking and custom headers."""
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from PyQt5.QtCore import QUrl
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from PyQt5.QtWebEngineCore import (QWebEngineUrlRequestInterceptor,
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QWebEngineUrlRequestInfo)
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from qutebrowser.config import config
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from qutebrowser.browser import shared
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from qutebrowser.utils import utils, log, debug
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class RequestInterceptor(QWebEngineUrlRequestInterceptor):
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"""Handle ad blocking and custom headers."""
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def __init__(self, host_blocker, args, parent=None):
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super().__init__(parent)
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self._host_blocker = host_blocker
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self._args = args
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def install(self, profile):
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"""Install the interceptor on the given QWebEngineProfile."""
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profile.setRequestInterceptor(self)
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# Gets called in the IO thread -> showing crash window will fail
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@utils.prevent_exceptions(None)
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def interceptRequest(self, info):
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"""Handle the given request.
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Reimplementing this virtual function and setting the interceptor on a
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profile makes it possible to intercept URL requests. This function is
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executed on the IO thread, and therefore running long tasks here will
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block networking.
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info contains the information about the URL request and will track
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internally whether its members have been altered.
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Args:
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info: QWebEngineUrlRequestInfo &info
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"""
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if 'log-requests' in self._args.debug_flags:
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resource_type = debug.qenum_key(QWebEngineUrlRequestInfo,
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info.resourceType())
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navigation_type = debug.qenum_key(QWebEngineUrlRequestInfo,
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info.navigationType())
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log.webview.debug("{} {}, first-party {}, resource {}, "
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"navigation {}".format(
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bytes(info.requestMethod()).decode('ascii'),
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info.requestUrl().toDisplayString(),
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info.firstPartyUrl().toDisplayString(),
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resource_type, navigation_type))
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url = info.requestUrl()
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first_party = info.firstPartyUrl()
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if ((url.scheme(), url.host(), url.path()) ==
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('qute', 'settings', '/set')):
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if (first_party != QUrl('qute://settings/') or
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info.resourceType() !=
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QWebEngineUrlRequestInfo.ResourceTypeXhr):
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log.webview.warning("Blocking malicious request from {} to {}"
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.format(first_party.toDisplayString(),
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url.toDisplayString()))
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info.block(True)
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return
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# FIXME:qtwebengine only block ads for NavigationTypeOther?
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if self._host_blocker.is_blocked(url, first_party):
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log.webview.info("Request to {} blocked by host blocker.".format(
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url.host()))
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info.block(True)
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for header, value in shared.custom_headers(url=url):
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info.setHttpHeader(header, value)
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user_agent = config.instance.get('content.headers.user_agent', url=url)
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if user_agent is not None:
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info.setHttpHeader(b'User-Agent', user_agent.encode('ascii'))
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