Python dns.exception() Examples

def _get_a_record(site, querytype='A', dnsserver=None):
    resolver = dns.resolver.Resolver()
    resolver.timeout = 5
    resolver.lifetime = 5

    if dnsserver:
        resolver.nameservers = [dnsserver]

    result = []
    while len(resolver.nameservers):
        try:
            resolved = resolver.query(site, querytype)
            print_debug(str(resolved.response))
            for item in resolved.rrset.items:
                result.append(item.to_text())
            return result

        except dns.exception.Timeout:
            print_debug("DNS Timeout for", site, "using", resolver.nameservers[0])
            resolver.nameservers.remove(resolver.nameservers[0])

    # If all the requests failed
    return "" 

def get_node(self, name, create=False):
        """Get a node in the zone, possibly creating it.

        This method is like L{find_node}, except it returns None instead
        of raising an exception if the node does not exist and creation
        has not been requested.

        @param name: the name of the node to find
        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
        @type create: bool
        @rtype: dns.node.Node object or None
        """

        try:
            node = self.find_node(name, create)
        except KeyError:
            node = None
        return node 

def _has_dns_propagated(fqdn, token):
    txt_records = []
    try:
        dns_resolver = dns.resolver.Resolver()
        dns_resolver.nameservers = [get_authoritative_nameserver(fqdn)]
        dns_response = dns_resolver.query(fqdn, "TXT")
        for rdata in dns_response:
            for txt_record in rdata.strings:
                txt_records.append(txt_record.decode("utf-8"))
    except dns.exception.DNSException:
        metrics.send("has_dns_propagated_fail", "counter", 1, metric_tags={"dns": fqdn})
        return False

    for txt_record in txt_records:
        if txt_record == token:
            metrics.send("has_dns_propagated_success", "counter", 1, metric_tags={"dns": fqdn})
            return True

    return False 

def to_digestable(self, origin=None):
        """Convert name to a format suitable for digesting in hashes.

        The name is canonicalized and converted to uncompressed wire format.

        @param origin: If the name is relative and origin is not None, then
        origin will be appended to it.
        @type origin: dns.name.Name object
        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
        absolute.  If self is a relative name, then an origin must be supplied;
        if it is missing, then this exception is raised
        @rtype: string
        """

        if not self.is_absolute():
            if origin is None or not origin.is_absolute():
                raise NeedAbsoluteNameOrOrigin
            labels = list(self.labels)
            labels.extend(list(origin.labels))
        else:
            labels = self.labels
        dlabels = [struct.pack('!B%ds' % len(x), len(x), x.lower())
                   for x in labels]
        return b''.join(dlabels) 

def get_node(self, name, create=False):
        """Get a node in the zone, possibly creating it.

        This method is like L{find_node}, except it returns None instead
        of raising an exception if the node does not exist and creation
        has not been requested.

        @param name: the name of the node to find
        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
        @type create: bool
        @rtype: dns.node.Node object or None
        """

        try:
            node = self.find_node(name, create)
        except KeyError:
            node = None
        return node 

def to_digestable(self, origin=None):
        """Convert name to a format suitable for digesting in hashes.

        The name is canonicalized and converted to uncompressed wire format.

        @param origin: If the name is relative and origin is not None, then
        origin will be appended to it.
        @type origin: dns.name.Name object
        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
        absolute.  If self is a relative name, then an origin must be supplied;
        if it is missing, then this exception is raised
        @rtype: string
        """

        if not self.is_absolute():
            if origin is None or not origin.is_absolute():
                raise NeedAbsoluteNameOrOrigin
            labels = list(self.labels)
            labels.extend(list(origin.labels))
        else:
            labels = self.labels
        dlabels = [struct.pack('!B%ds' % len(x), len(x), x.lower())
                   for x in labels]
        return b''.join(dlabels) 

def _get_a_records(sitelist, querytype='A', dnsserver=None, googleapi=False):
    result = []
    for site in sorted(sitelist):
        try:
            if googleapi:
                responses = _get_a_record_over_google_api(site, querytype)
                print_debug("Google API вернул {}".format(responses))
            else:
                responses = _get_a_record(site, querytype, dnsserver)

            for item in responses:
                result.append(item)
        except dns.resolver.NXDOMAIN:
            print("[!] Невозможно получить DNS-запись для домена {} (NXDOMAIN). Результаты могут быть неточными.".format(site))
        except dns.resolver.NoAnswer:
            print_debug("DNS NoAnswer:", site)
        except dns.exception.DNSException as e:
            print_debug("DNSException:", str(e))
            really_bad_fuckup_happened()

    return sorted(result) 

def get_node(self, name, create=False):
        """Get a node in the zone, possibly creating it.

        This method is like L{find_node}, except it returns None instead
        of raising an exception if the node does not exist and creation
        has not been requested.

        @param name: the name of the node to find
        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
        @type create: bool
        @rtype: dns.node.Node object or None
        """

        try:
            node = self.find_node(name, create)
        except KeyError:
            node = None
        return node 

def get_uint32(self):
        """Read the next token and interpret it as a 32-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        if not token.value.isdigit():
            raise dns.exception.SyntaxError('expecting an integer')
        value = long(token.value)
        if value < 0 or value > long(4294967296):
            raise dns.exception.SyntaxError(
                '%d is not an unsigned 32-bit integer' % value)
        return value 

def get_uint32(self):
        """Read the next token and interpret it as a 32-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        if not token.value.isdigit():
            raise dns.exception.SyntaxError('expecting an integer')
        value = long(token.value)
        if value < 0 or value > long(4294967296):
            raise dns.exception.SyntaxError(
                '%d is not an unsigned 32-bit integer' % value)
        return value 

def to_digestable(self, origin=None):
        """Convert name to a format suitable for digesting in hashes.

        The name is canonicalized and converted to uncompressed wire format.

        @param origin: If the name is relative and origin is not None, then
        origin will be appended to it.
        @type origin: dns.name.Name object
        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
        absolute.  If self is a relative name, then an origin must be supplied;
        if it is missing, then this exception is raised
        @rtype: string
        """

        if not self.is_absolute():
            if origin is None or not origin.is_absolute():
                raise NeedAbsoluteNameOrOrigin
            labels = list(self.labels)
            labels.extend(list(origin.labels))
        else:
            labels = self.labels
        dlabels = [struct.pack('!B%ds' % len(x), len(x), x.lower())
                   for x in labels]
        return b''.join(dlabels) 

def get_node(self, name, create=False):
        """Get a node in the zone, possibly creating it.

        This method is like L{find_node}, except it returns None instead
        of raising an exception if the node does not exist and creation
        has not been requested.

        @param name: the name of the node to find
        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
        @type create: bool
        @rtype: dns.node.Node object or None
        """

        try:
            node = self.find_node(name, create)
        except KeyError:
            node = None
        return node 

def get_uint32(self):
        """Read the next token and interpret it as a 32-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        if not token.value.isdigit():
            raise dns.exception.SyntaxError('expecting an integer')
        value = long(token.value)
        if value < 0 or value > long(4294967296):
            raise dns.exception.SyntaxError(
                '%d is not an unsigned 32-bit integer' % value)
        return value 

def _wait_for(fd, readable, writable, error, expiration):
    done = False
    while not done:
        if expiration is None:
            timeout = None
        else:
            timeout = expiration - time.time()
            if timeout <= 0.0:
                raise dns.exception.Timeout
        try:
            if not _polling_backend(fd, readable, writable, error, timeout):
                raise dns.exception.Timeout
        except select_error as e:
            if e.args[0] != errno.EINTR:
                raise e
        done = True 

def get_uint32(self):
        """Read the next token and interpret it as a 32-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        if not token.value.isdigit():
            raise dns.exception.SyntaxError('expecting an integer')
        value = long(token.value)
        if value < 0 or value > long(4294967296):
            raise dns.exception.SyntaxError(
                '%d is not an unsigned 32-bit integer' % value)
        return value 

def get_uint32(self):
        """Read the next token and interpret it as a 32-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        if not token.value.isdigit():
            raise dns.exception.SyntaxError('expecting an integer')
        value = long(token.value)
        if value < 0 or value > 4294967296L:
            raise dns.exception.SyntaxError('%d is not an unsigned 32-bit integer' % value)
        return value 

def _wait_for(fd, readable, writable, error, expiration):
    done = False
    while not done:
        if expiration is None:
            timeout = None
        else:
            timeout = expiration - time.time()
            if timeout <= 0.0:
                raise dns.exception.Timeout
        try:
            if not _polling_backend(fd, readable, writable, error, timeout):
                raise dns.exception.Timeout
        except select_error as e:
            if e.args[0] != errno.EINTR:
                raise e
        done = True 

def to_digestable(self, origin=None):
        """Convert name to a format suitable for digesting in hashes.

        The name is canonicalized and converted to uncompressed wire format.

        @param origin: If the name is relative and origin is not None, then
        origin will be appended to it.
        @type origin: dns.name.Name object
        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
        absolute.  If self is a relative name, then an origin must be supplied;
        if it is missing, then this exception is raised
        @rtype: string
        """

        if not self.is_absolute():
            if origin is None or not origin.is_absolute():
                raise NeedAbsoluteNameOrOrigin
            labels = list(self.labels)
            labels.extend(list(origin.labels))
        else:
            labels = self.labels
        dlabels = ["%s%s" % (chr(len(x)), x.lower()) for x in labels]
        return ''.join(dlabels) 

def to_digestable(self, origin=None):
        """Convert name to a format suitable for digesting in hashes.

        The name is canonicalized and converted to uncompressed wire format.

        @param origin: If the name is relative and origin is not None, then
        origin will be appended to it.
        @type origin: dns.name.Name object
        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
        absolute.  If self is a relative name, then an origin must be supplied;
        if it is missing, then this exception is raised
        @rtype: string
        """

        if not self.is_absolute():
            if origin is None or not origin.is_absolute():
                raise NeedAbsoluteNameOrOrigin
            labels = list(self.labels)
            labels.extend(list(origin.labels))
        else:
            labels = self.labels
        dlabels = [struct.pack('!B%ds' % len(x), len(x), x.lower())
                   for x in labels]
        return b''.join(dlabels) 

def _wait_for(fd, readable, writable, error, expiration):
    done = False
    while not done:
        if expiration is None:
            timeout = None
        else:
            timeout = expiration - time.time()
            if timeout <= 0.0:
                raise dns.exception.Timeout
        try:
            if not _polling_backend(fd, readable, writable, error, timeout):
                raise dns.exception.Timeout
        except select.error, e:
            if e.args[0] != errno.EINTR:
                raise e
        done = True 

def get_node(self, name, create=False):
        """Get a node in the zone, possibly creating it.

        This method is like L{find_node}, except it returns None instead
        of raising an exception if the node does not exist and creation
        has not been requested.

        @param name: the name of the node to find
        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
        @type create: bool
        @rtype: dns.node.Node object or None
        """

        try:
            node = self.find_node(name, create)
        except KeyError:
            node = None
        return node 

def _wait_for(fd, readable, writable, error, expiration):
    done = False
    while not done:
        if expiration is None:
            timeout = None
        else:
            timeout = expiration - time.time()
            if timeout <= 0.0:
                raise dns.exception.Timeout
        try:
            if not _polling_backend(fd, readable, writable, error, timeout):
                raise dns.exception.Timeout
        except select_error as e:
            if e.args[0] != errno.EINTR:
                raise e
        done = True 

def _net_read(sock, count, expiration):
    """Read the specified number of bytes from sock.  Keep trying until we
    either get the desired amount, or we hit EOF.
    A Timeout exception will be raised if the operation is not completed
    by the expiration time.
    """
    s = b''
    while count > 0:
        _wait_for_readable(sock, expiration)
        n = sock.recv(count)
        if n == b'':
            raise EOFError
        count = count - len(n)
        s = s + n
    return s 

def __add__(self, e_nx):
        """Augment by results from another NXDOMAIN exception."""
        qnames0 = list(self.kwargs.get('qnames', []))
        responses0 = dict(self.kwargs.get('responses', {}))
        responses1 = e_nx.kwargs.get('responses', {})
        for qname1 in e_nx.kwargs.get('qnames', []):
            if qname1 not in qnames0:
                qnames0.append(qname1)
            if qname1 in responses1:
                responses0[qname1] = responses1[qname1]
        return NXDOMAIN(qnames=qnames0, responses=responses0) 

def get_ttl(self):
        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        return dns.ttl.from_text(token.value) 

def get_name(self, origin=None):
        """Read the next token and interpret it as a DNS name.

        @raises dns.exception.SyntaxError:
        @rtype: dns.name.Name object"""

        token = self.get()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        return dns.name.from_text(token.value, origin) 

def get_uint16(self):
        """Read the next token and interpret it as a 16-bit unsigned
        integer.

        @raises dns.exception.SyntaxError:
        @rtype: int
        """

        value = self.get_int()
        if value < 0 or value > 65535:
            raise dns.exception.SyntaxError(
                '%d is not an unsigned 16-bit integer' % value)
        return value 

def get_identifier(self, origin=None):
        """Read the next token and raise an exception if it is not an identifier.

        @raises dns.exception.SyntaxError:
        @rtype: string
        """

        token = self.get().unescape()
        if not token.is_identifier():
            raise dns.exception.SyntaxError('expecting an identifier')
        return token.value 

def _net_write(sock, data, expiration):
    """Write the specified data to the socket.
    A Timeout exception will be raised if the operation is not completed
    by the expiration time.
    """
    current = 0
    l = len(data)
    while current < l:
        _wait_for_writable(sock, expiration)
        current += sock.send(data[current:]) 

def get_string(self, origin=None):
        """Read the next token and interpret it as a string.

        @raises dns.exception.SyntaxError:
        @rtype: string
        """

        token = self.get().unescape()
        if not (token.is_identifier() or token.is_quoted_string()):
            raise dns.exception.SyntaxError('expecting a string')
        return token.value