Python resolver.NoAnswer方法代码示例

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def _check_one_challenge(challenge: str, token: Optional[str]) -> bool:
    try:
        answers = resolver.query(challenge, "TXT")
    except (resolver.NXDOMAIN, resolver.NoAnswer):
        print("TXT {0} does not exist.".format(challenge))
        return False
    else:
        print("TXT {0} exists.".format(challenge))

    if token:
        validation_answers = [
            rdata
            for rdata in answers
            for txt_string in rdata.strings
            if txt_string.decode("utf-8") == token
        ]

        if not validation_answers:
            print("TXT {0} does not have the expected token value.".format(challenge))
            return False

        print("TXT {0} has the expected token value.")

    return True 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def process(self, headers, content):
        request = Services.get("request_factory")
        hostname = urlparse(request.url).hostname
        try:
            resolver = Resolver(configure=False)
            resolver.nameservers = [settings.dns_resolver]
            resolver.timeout = 2
            resolver.lifetime = 2

            dns_query = resolver.query(hostname + ".edgekey.net", "A")

            if len(dns_query) > 0:
                return "Akamai CDN"

        except NXDOMAIN:
            pass
        except NoAnswer:
            pass
        except Timeout:
            pass 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def process(self, headers, content):
        request = Services.get("request_factory")
        hostname = urlparse(request.url).hostname
        _ = False
        try:
            resolver = Resolver(configure=False)
            resolver.nameservers = [settings.dns_resolver]
            resolver.timeout = 2
            resolver.lifetime = 2

            dns_query = resolver.query(hostname, "CNAME")

            if len(dns_query) > 0:
                for answer in dns_query:
                    _ |= re.search(r"cloudfront\.net", str(answer), re.I) is not None
            if _:
                return "CloudFront CDN (Amazon)"
        except NoAnswer:
            pass
        except NXDOMAIN:
            pass
        except Timeout:
            pass 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def process(self, headers, content):
        request = Services.get("request_factory")
        hostname = urlparse(request.url).hostname
        _ = False

        try:
            resolver = Resolver(configure=False)
            resolver.nameservers = [settings.dns_resolver]
            resolver.timeout = 2
            resolver.lifetime = 2

            dns_query = resolver.query(hostname, "CNAME")
            if len(dns_query) > 0:
                for answer in dns_query:
                    _ |= re.search(r"azureedge\.net", str(answer), re.I) is not None
            if _:
                return "Azure CDN"
        except NoAnswer:
            pass
        except NXDOMAIN:
            pass
        except Timeout:
            pass 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def process(self, headers, content):
        request = Services.get("request_factory")
        hostname = urlparse(request.url).hostname
        try:
            resolver = Resolver(configure=False)
            resolver.nameservers = [settings.dns_resolver]
            resolver.timeout = 2
            resolver.lifetime = 2
            dns_query = resolver.query(hostname + ".cdn.cloudflare.net", "A")

            if len(dns_query) > 0:
                return "Cloudflare CDN"

        except NXDOMAIN:
            pass
        except NoAnswer:
            pass
        except Timeout:
            pass 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def process(self, headers, content):
        request = Services.get("request_factory")
        hostname = urlparse(request.url).hostname
        _ = False
        try:
            resolver = Resolver(configure=False)
            resolver.nameservers = [settings.dns_resolver]
            resolver.timeout = 2
            resolver.lifetime = 2

            dns_query = resolver.query(hostname, "CNAME")
            if len(dns_query) > 0:
                for answer in dns_query:
                    _ |= re.search(r"fastly\.net", str(answer), re.I) is not None
            if _:
                return "Fastly CDN"
        except NoAnswer:
            pass
        except NXDOMAIN:
            pass
        except Timeout:
            pass 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def reflush(obj, nameserver):
    r = resolver.Resolver()
    r.nameservers = [nameserver]
    try:
        answers = r.query(obj.url, 'CNAME')
        for rdata in answers:
            return rdata.to_text()[:-1]
    except resolver.NoAnswer as e:
        try:
            answer = r.query(obj.url, 'A')
            for rr in answer:
                return rr.address
        except Exception as e:
            pass
    except resolver.NXDOMAIN as e:
        return ''
    return '' 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def test_rbl():
    """ handles failure ok, and handles lookups ok with dns module.
    """
    import mock
    from dns.resolver import NoAnswer, NXDOMAIN, NoNameservers

    from pygameweb.user.rbl import rbl

    assert rbl('127.0.0.1') is False
    assert rbl('') is False

    with mock.patch('dns.resolver.query') as query:
        query.side_effect = NoAnswer()
        assert rbl('192.168.0.1') is False
        query.side_effect = NXDOMAIN()
        assert rbl('192.168.0.1') is False
        query.side_effect = NoNameservers()
        assert rbl('192.168.0.1') is False

    with mock.patch('dns.resolver.query') as query:
        query.side_effect = '127.0.0.2'
        assert rbl('192.168.0.1') is True
        assert query.called 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def resolve_ns(data, t='A', timeout=HUNTER_RESOLVER_TIMEOUT):
    resolver = dns.resolver.Resolver()
    resolver.timeout = timeout
    resolver.lifetime = timeout
    resolver.search = []
    try:
        answers = resolver.query(data, t)
        resp = []
        for rdata in answers:
            resp.append(rdata)
    except (NoAnswer, NXDOMAIN, EmptyLabel, NoNameservers, Timeout) as e:
        if str(e).startswith('The DNS operation timed out after'):
            logger.info('{} - {} -- this may be normal'.format(data, e))
            return []

        if not str(e).startswith('The DNS response does not contain an answer to the question'):
            if not str(e).startswith('None of DNS query names exist'):
                logger.info('{} - {}'.format(data, e))
        return []

    return resp 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def get_mx_domains(domain, dns_resolver=_dns_resolver):
    """ Retrieve and return the MX records for a domain. """
    mx_records = []
    try:
        mx_records = dns_resolver().query(domain, 'MX')
    except NoNameservers:
        log.error('NoMXservers', domain=domain)
    except NXDOMAIN:
        log.error('No such domain', domain=domain)
    except Timeout:
        log.error('Time out during resolution', domain=domain)
        raise
    except NoAnswer:
        log.error('No answer from provider', domain=domain)
        mx_records = _fallback_get_mx_domains(domain)

    return [str(rdata.exchange).lower() for rdata in mx_records] 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def query_dns(cls, domains, records):
        """
        Query DNS records for host.
        :param domains: Iterable of domains to get DNS Records for
        :param records: Iterable of DNS records to get from domain.
        """
        results = {k: set() for k in records}
        for record in records:
            for domain in domains:
                try:
                    answers = cls.resolver.query(domain, record)
                    for answer in answers:
                        # Add value to record type
                        results.get(record).add(answer)
                except (resolver.NoAnswer, resolver.NXDOMAIN, resolver.NoNameservers):
                    # Type of record doesn't fit domain or no answer from ns
                    continue

        return {k: v for k, v in results.items() if v} 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def lookup_host(self, hostname, keep_going=True):
        result = set()

        for source in self.bind_addresses or [None]:
            if source is None:
                self.resolver.nameservers = self.nameservers
            else:
                self.resolver.nameservers = [str(dns) for dns in self.dns_servers if dns.version == source.version]
                if not self.resolver.nameservers:
                    continue

            for rectype in self.rectypes:
                try:
                    # print("Issuing query for hostname %r, rectype %r, source %r, search_domains %r, nameservers %r" % (
                    #     hostname, rectype, source, self.resolver.search_domains, self.resolver.nameservers), file=stderr)
                    a = self.resolver.query(hostname, rectype, source=str(source))
                    print("Got results: %r" % list(a), file=stderr)
                except (NXDOMAIN, NoAnswer):
                    pass
                except Timeout:
                    # No point in retrying with a different rectype if these DNS server(s) are not responding
                    break
                else:
                    result.update(ip_address(r.address) for r in a)
                if result and not keep_going:
                    return result

        return result or None 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def _get_dns_txt_options(hostname):
    try:
        results = resolver.query(hostname, 'TXT')
    except (resolver.NoAnswer, resolver.NXDOMAIN):
        # No TXT records
        return None
    except Exception as exc:
        raise ConfigurationError(str(exc))
    if len(results) > 1:
        raise ConfigurationError('Only one TXT record is supported')
    return (
        b'&'.join([b''.join(res.strings) for res in results])).decode('utf-8') 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def do_query_a(domain, resolver):
    try:
        answer = resolver.query(domain, 'A')
    # If resolve random subdomain raise timeout error, try again
    except Timeout as e:
        logger.log('ALERT', f'DNS resolve timeout, retrying')
        logger.log('DEBUG', e.args)
        raise tenacity.TryAgain
    # If resolve random subdomain raise NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers error
    # It means that there is no A record of random subdomain and not use wildcard dns record
    except (NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers) as e:
        logger.log('DEBUG', e.args)
        logger.log('INFOR', f'{domain} seems not use wildcard dns record')
        return False
    except Exception as e:
        logger.log('ALERT', f'Detect {domain} wildcard dns record error')
        logger.log('FATAL', e.args)
        exit(1)
    else:
        if answer.rrset is None:
            logger.log('ALERT', f'DNS resolve dont have result, retrying')
            raise tenacity.TryAgain
        ttl = answer.ttl
        name = answer.name
        ips = {item.address for item in answer}
        logger.log('ALERT', f'{domain} use wildcard dns record')
        logger.log('ALERT', f'{domain} resolve to: {name} '
                            f'IP: {ips} TTL: {ttl}')
        return True 

# 需要导入模块: from dns import resolver [as 别名]
# 或者: from dns.resolver import NoAnswer [as 别名]
def get_wildcard_record(domain, resolver):
    logger.log('INFOR', f'Query {domain} \'s wildcard dns record in authoritative name server')
    try:
        answer = resolver.query(domain, 'A')
    # 如果查询随机域名A记录时抛出Timeout异常则重新查询
    except Timeout as e:
        logger.log('ALERT', f'Query timeout, retrying')
        logger.log('DEBUG', e.args)
        raise tenacity.TryAgain
    except (NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers) as e:
        logger.log('DEBUG', e.args)
        logger.log('INFOR', f'{domain} dont have A record on authoritative name server')
        return None, None
    except Exception as e:
        logger.log('ERROR', e.args)
        logger.log('ERROR', f'Query {domain} wildcard dns record in authoritative name server error')
        exit(1)
    else:
        if answer.rrset is None:
            logger.log('DEBUG', f'No record of query result')
            return None, None
        name = answer.name
        ip = {item.address for item in answer}
        ttl = answer.ttl
        logger.log('INFOR', f'{domain} results on authoritative name server: {name} '
                            f'IP: {ip} TTL: {ttl}')
        return ip, ttl