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Current File : /usr/lib/python3/dist-packages/libcloud/common/durabledns.py
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from typing import List
from typing import Dict

import re
from xml.etree import ElementTree as ET   # noqa

from libcloud.common.base import ConnectionUserAndKey
from libcloud.common.base import XmlResponse


# API HOST to connect
API_HOST = 'durabledns.com'


def _schema_builder(urn_nid, method, attributes):
    """
    Return a xml schema used to do an API request.

    :param urn_nid: API urn namespace id.
    :type urn_nid: type: ``str``

    :param method: API method.
    :type method: type: ``str``

    :param attributes: List of attributes to include.
    :type attributes: ``list`` of ``str``

    rtype: :class:`Element`
    """
    soap = ET.Element(
        'soap:Body',
        {'xmlns:m': "https://durabledns.com/services/dns/%s" % method}
    )
    urn = ET.SubElement(soap, 'urn:%s:%s' % (urn_nid, method))
    # Attributes specification
    for attribute in attributes:
        ET.SubElement(urn, 'urn:%s:%s' % (urn_nid, attribute))
    return soap


SCHEMA_BUILDER_MAP = {
    'list_zones': {
        'urn_nid': 'listZoneswsdl',
        'method': 'listZones',
        'attributes': ['apiuser', 'apikey']
    },
    'list_records': {
        'urn_nid': 'listRecordswsdl',
        'method': 'listRecords',
        'attributes': ['apiuser', 'apikey', 'zonename']
    },
    'get_zone': {
        'urn_nid': 'getZonewsdl',
        'method': 'getZone',
        'attributes': ['apiuser', 'apikey', 'zonename']
    },
    'get_record': {
        'urn_nid': 'getRecordwsdl',
        'method': 'getRecord',
        'attributes': ['apiuser', 'apikey', 'zonename', 'recordid']
    },
    'create_zone': {
        'urn_nid': 'createZonewsdl',
        'method': 'createZone',
        'attributes': ['apiuser', 'apikey', 'zonename', 'ns', 'mbox',
                       'refresh', 'retry', 'expire', 'minimum', 'ttl',
                       'xfer', 'update_acl']
    },
    'create_record': {
        'urn_nid': 'createRecordwsdl',
        'method': 'createRecord',
        'attributes': ['apiuser', 'apikey', 'zonename', 'name', 'type',
                       'data', 'aux', 'ttl', 'ddns_enabled']
    },
    'update_zone': {
        'urn_nid': 'updateZonewsdl',
        'method': 'updateZone',
        'attributes': ['apiuser', 'apikey', 'zonename', 'ns', 'mbox',
                       'refresh', 'retry', 'expire', 'minimum', 'ttl',
                       'xfer', 'update_acl']
    },
    'update_record': {
        'urn_nid': 'updateRecordwsdl',
        'method': 'updateRecord',
        'attributes': ['apiuser', 'apikey', 'zonename', 'id', 'name', 'aux',
                       'data', 'ttl', 'ddns_enabled']
    },
    'delete_zone': {
        'urn_nid': 'deleteZonewsdl',
        'method': 'deleteZone',
        'attributes': ['apiuser', 'apikey', 'zonename']
    },
    'delete_record': {
        'urn_nid': 'deleteRecordwsdl',
        'method': 'deleteRecord',
        'attributes': ['apiuser', 'apikey', 'zonename', 'id']
    }
}


class DurableDNSException(Exception):

    def __init__(self, code, message):
        self.code = code
        self.message = message
        self.args = (code, message)

    def __str__(self):
        return "%s %s" % (self.code, self.message)

    def __repr__(self):
        return "DurableDNSException %s %s" % (self.code, self.message)


class DurableResponse(XmlResponse):

    errors = []  # type: List[Dict]
    objects = []  # type: List[Dict]

    def __init__(self, response, connection):
        super(DurableResponse, self).__init__(response=response,
                                              connection=connection)

        self.objects, self.errors = self.parse_body_and_error()
        if self.errors:
            raise self._make_excp(self.errors[0])

    def parse_body_and_error(self):
        """
        Used to parse body from httplib.HttpResponse object.
        """
        objects = []
        errors = []
        error_dict = {}
        extra = {}
        zone_dict = {}
        record_dict = {}
        xml_obj = self.parse_body()

        # pylint: disable=no-member
        envelop_body = list(xml_obj)[0]
        method_resp = list(envelop_body)[0]
        # parse the xml_obj
        # handle errors
        if 'Fault' in method_resp.tag:
            fault = [fault for fault in list(method_resp)
                     if fault.tag == 'faultstring'][0]
            error_dict['ERRORMESSAGE'] = fault.text.strip()
            error_dict['ERRORCODE'] = self.status
            errors.append(error_dict)

        # parsing response from listZonesResponse
        if 'listZonesResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            for element in answer:
                zone_dict['id'] = list(element)[0].text
                objects.append(zone_dict)
                # reset the zone_dict
                zone_dict = {}
        # parse response from listRecordsResponse
        if 'listRecordsResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            for element in answer:
                for child in list(element):
                    if child.tag == 'id':
                        record_dict['id'] = child.text.strip()
                objects.append(record_dict)
                # reset the record_dict for later usage
                record_dict = {}
        # parse response from getZoneResponse
        if 'getZoneResponse' in method_resp.tag:
            for child in list(method_resp):
                if child.tag == 'origin':
                    zone_dict['id'] = child.text.strip()
                    zone_dict['domain'] = child.text.strip()
                elif child.tag == 'ttl':
                    zone_dict['ttl'] = int(child.text.strip())
                elif child.tag == 'retry':
                    extra['retry'] = int(child.text.strip())
                elif child.tag == 'expire':
                    extra['expire'] = int(child.text.strip())
                elif child.tag == 'minimum':
                    extra['minimum'] = int(child.text.strip())
                else:
                    if child.text:
                        extra[child.tag] = child.text.strip()
                    else:
                        extra[child.tag] = ''
                    zone_dict['extra'] = extra
            objects.append(zone_dict)
        # parse response from getRecordResponse
        if 'getRecordResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            for child in list(method_resp):
                if child.tag == 'id' and child.text:
                    record_dict['id'] = child.text.strip()
                elif child.tag == 'name' and child.text:
                    record_dict['name'] = child.text.strip()
                elif child.tag == 'type' and child.text:
                    record_dict['type'] = child.text.strip()
                elif child.tag == 'data' and child.text:
                    record_dict['data'] = child.text.strip()
                elif child.tag == 'aux' and child.text:
                    record_dict['aux'] = child.text.strip()
                elif child.tag == 'ttl' and child.text:
                    record_dict['ttl'] = child.text.strip()
            if not record_dict:
                error_dict['ERRORMESSAGE'] = 'Record does not exist'
                error_dict['ERRORCODE'] = 404
                errors.append(error_dict)
            objects.append(record_dict)
            record_dict = {}
        if 'createZoneResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            if answer.tag == 'return' and answer.text:
                record_dict['id'] = answer.text.strip()
            objects.append(record_dict)
        # catch Record does not exists error when deleting record
        if 'deleteRecordResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            if 'Record does not exists' in answer.text.strip():
                errors.append({'ERRORMESSAGE': answer.text.strip(),
                               'ERRORCODE': self.status})
        # parse response in createRecordResponse
        if 'createRecordResponse' in method_resp.tag:
            answer = list(method_resp)[0]
            record_dict['id'] = answer.text.strip()
            objects.append(record_dict)
            record_dict = {}

        return (objects, errors)

    def parse_body(self):
        # A problem arise in the api response because there are undeclared
        # xml namespaces. In order to fix that at the moment, we use the
        # _fix_response method to clean up since we won't always have lxml
        # library.
        self._fix_response()
        body = super(DurableResponse, self).parse_body()
        return body

    def success(self):
        """
        Used to determine if the request was successful.
        """
        return len(self.errors) == 0

    def _make_excp(self, error):
        return DurableDNSException(error['ERRORCODE'], error['ERRORMESSAGE'])

    def _fix_response(self):
        items = re.findall('<ns1:.+ xmlns:ns1="">', self.body, flags=0)
        for item in items:
            parts = item.split(' ')
            prefix = parts[0].replace('<', '').split(':')[1]
            new_item = "<" + prefix + ">"
            close_tag = "</" + parts[0].replace('<', '') + ">"
            new_close_tag = "</" + prefix + ">"
            self.body = self.body.replace(item, new_item)
            self.body = self.body.replace(close_tag, new_close_tag)


class DurableConnection(ConnectionUserAndKey):
    host = API_HOST
    responseCls = DurableResponse

    def add_default_params(self, params):
        params['user_id'] = self.user_id
        params['key'] = self.key
        return params

    def add_default_headers(self, headers):
        headers['Content-Type'] = 'text/xml'
        headers['Content-Encoding'] = 'gzip; charset=ISO-8859-1'
        return headers

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