bddda6b778
It blows our HTML up, but we use error.html from various places with various security policies, so we can't rely on being able to load file:// URLs.
105 lines
3.3 KiB
Python
105 lines
3.3 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014-2016 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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"""Utilities related to jinja2."""
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import os
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import os.path
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import traceback
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import mimetypes
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import base64
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import jinja2
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import jinja2.exceptions
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from qutebrowser.utils import utils, urlutils, log
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from PyQt5.QtCore import QUrl
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class Loader(jinja2.BaseLoader):
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"""Jinja loader which uses utils.read_file to load templates.
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Attributes:
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_subdir: The subdirectory to find templates in.
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"""
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def __init__(self, subdir):
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self._subdir = subdir
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def get_source(self, _env, template):
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path = os.path.join(self._subdir, template)
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try:
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source = utils.read_file(path)
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except OSError:
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raise jinja2.TemplateNotFound(template)
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# Currently we don't implement auto-reloading, so we always return True
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# for up-to-date.
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return source, path, lambda: True
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def _guess_autoescape(template_name):
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"""Turn auto-escape on/off based on the file type.
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Based on http://jinja.pocoo.org/docs/dev/api/#autoescaping
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"""
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if template_name is None or '.' not in template_name:
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return False
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ext = template_name.rsplit('.', 1)[1]
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return ext in ['html', 'htm', 'xml']
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def resource_url(path):
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"""Load images from a relative path (to qutebrowser).
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Arguments:
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path: The relative path to the image
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"""
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image = utils.resource_filename(path)
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return QUrl.fromLocalFile(image).toString(QUrl.FullyEncoded)
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def data_url(path):
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"""Get a data: url for the broken qutebrowser logo."""
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data = utils.read_file(path, binary=True)
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filename = utils.resource_filename(path)
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mimetype = mimetypes.guess_type(filename)
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assert mimetype is not None, path
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b64 = base64.b64encode(data).decode('ascii')
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return 'data:{};charset=utf-8;base64,{}'.format(mimetype[0], b64)
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def render(template, **kwargs):
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"""Render the given template and pass the given arguments to it."""
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try:
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return _env.get_template(template).render(**kwargs)
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except jinja2.exceptions.UndefinedError:
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log.misc.exception("UndefinedError while rendering " + template)
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err_path = os.path.join('html', 'undef_error.html')
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err_template = utils.read_file(err_path)
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tb = traceback.format_exc()
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return err_template.format(pagename=template, traceback=tb)
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_env = jinja2.Environment(loader=Loader('html'), autoescape=_guess_autoescape)
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_env.globals['resource_url'] = resource_url
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_env.globals['file_url'] = urlutils.file_url
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_env.globals['data_url'] = data_url
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