view sat_frontends/jp/xml_tools.py @ 3153:2c7b42f53e9a

core (xmpp): avoid starting several clients at the same time: a check is done to avoid running startConnection several times at once, which would lead to the creation of several SatXMPPEntity instances at the same time, resulting in many issues. If startConnection is called while a previous one is not finished yet, a CancelError is now raised.
author Goffi <goffi@goffi.org>
date Mon, 03 Feb 2020 13:46:24 +0100
parents 559a625a236b
children be6d91572633
line wrap: on
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#!/usr/bin/env python3


# jp: a SàT command line tool
# Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from sat.core.i18n import _
from sat_frontends.jp.constants import Const as C

def etreeParse(cmd, raw_xml, reraise=False):
    """Import lxml and parse raw XML

    @param cmd(CommandBase): current command instance
    @param raw_xml(file, str): an XML bytestring, string or file-like object
    @param reraise(bool): if True, re raise exception on parse error instead of doing a
        parser.error (which terminate the execution)
    @return (tuple(etree.Element, module): parsed element, etree module
    """
    try:
        from lxml import etree
    except ImportError:
        cmd.disp(
            'lxml module must be installed, please install it with "pip install lxml"',
            error=True,
        )
        cmd.host.quit(C.EXIT_ERROR)
    try:
        if isinstance(raw_xml, str):
            parser = etree.XMLParser(remove_blank_text=True)
            element = etree.fromstring(raw_xml, parser)
        else:
            element = etree.parse(raw_xml).getroot()
    except Exception as e:
        if reraise:
            raise e
        cmd.parser.error(
            _("Can't parse the payload XML in input: {msg}").format(msg=e)
        )
    return element, etree

def getPayload(cmd, element):
    """Retrieve payload element and exit with and error if not found

    @param element(etree.Element): root element
    @return element(etree.Element): payload element
    """
    if element.tag in ("item", "{http://jabber.org/protocol/pubsub}item"):
        if len(element) > 1:
            cmd.disp(_("<item> can only have one child element (the payload)"),
                     error=True)
            cmd.host.quit(C.EXIT_DATA_ERROR)
        element = element[0]
    return element