twisted.names.common.ResolverBase

Known subclasses: twisted.mail.test.test_mail.TestAuthority, twisted.names.authority.FileAuthority, twisted.names.cache.CacheResolver, twisted.names.client.Resolver, twisted.names.hosts.Resolver, twisted.names.resolve.ResolverChain, twisted.names.root.Resolver, twisted.names.test.test_client.FakeResolver, twisted.names.test.test_srvconnect.FakeResolver

Implements interfaces: twisted.internet.interfaces.IResolver

ResolverBase is a base class for implementations of interfaces.IResolver which deals with a lot of the boilerplate of implementing all of the lookup methods.

Method	__init__	Undocumented
Method	exceptionForCode	Convert a response code (one of the possible values of `dns.Message.rCode` to an exception instance representing it.
Method	query	Dispatch `query` to the method which can handle its type.
Method	lookupAddress	Perform an A record lookup.
Method	lookupIPV6Address	Perform an AAAA record lookup.
Method	lookupAddress6	Perform an A6 record lookup.
Method	lookupMailExchange	Perform an MX record lookup.
Method	lookupNameservers	Perform an NS record lookup.
Method	lookupCanonicalName	Perform a CNAME record lookup.
Method	lookupMailBox	Perform an MB record lookup.
Method	lookupMailGroup	Perform an MG record lookup.
Method	lookupMailRename	Perform an MR record lookup.
Method	lookupPointer	Perform a PTR record lookup.
Method	lookupAuthority	Perform an SOA record lookup.
Method	lookupNull	Perform a NULL record lookup.
Method	lookupWellKnownServices	Perform a WKS record lookup.
Method	lookupService	Perform an SRV record lookup.
Method	lookupHostInfo	Perform a HINFO record lookup.
Method	lookupMailboxInfo	Perform an MINFO record lookup.
Method	lookupText	Perform a TXT record lookup.
Method	lookupSenderPolicy	Perform a SPF record lookup.
Method	lookupResponsibility	Perform an RP record lookup.
Method	lookupAFSDatabase	Perform an AFSDB record lookup.
Method	lookupZone	Perform an AXFR record lookup.
Method	lookupNamingAuthorityPointer	Perform a NAPTR record lookup.
Method	lookupAllRecords	Perform an ALL_RECORD lookup.
Method	getHostByName	Resolve the domain name `name` into an IP address.
Class Variable	_errormap	A `dict` mapping DNS protocol failure response codes to exception classes which will be used to represent those failures.
Method	_lookup	Undocumented
Method	_cbRecords	Undocumented

_errormap =

A dict mapping DNS protocol failure response codes to exception classes which will be used to represent those failures.

def __init__(self):

overridden in twisted.mail.test.test_mail.TestAuthority, twisted.names.authority.FileAuthority, twisted.names.cache.CacheResolver, twisted.names.client.Resolver, twisted.names.hosts.Resolver, twisted.names.resolve.ResolverChain, twisted.names.root.Resolver, twisted.names.test.test_srvconnect.FakeResolver

Undocumented

def exceptionForCode(self, responseCode):

Convert a response code (one of the possible values of dns.Message.rCode to an exception instance representing it.

Present Since 10.0

def query(self, query, timeout=None):

from twisted.internet.interfaces.IResolver

Dispatch query to the method which can handle its type.

Parameters	query	The DNS query being issued, to which a response is to be generated. (type: `twisted.names.dns.Query`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def _lookup(self, name, cls, type, timeout):

overridden in twisted.mail.test.test_mail.TestAuthority, twisted.names.authority.FileAuthority, twisted.names.cache.CacheResolver, twisted.names.client.Resolver, twisted.names.resolve.ResolverChain, twisted.names.root.Resolver, twisted.names.test.test_client.FakeResolver, twisted.names.test.test_srvconnect.FakeResolver

Undocumented

def lookupAddress(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

overridden in twisted.names.hosts.Resolver

Perform an A record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupIPV6Address(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

overridden in twisted.names.hosts.Resolver

Perform an AAAA record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupAddress6(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an A6 record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupMailExchange(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an MX record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupNameservers(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an NS record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupCanonicalName(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a CNAME record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupMailBox(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an MB record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupMailGroup(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an MG record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupMailRename(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an MR record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupPointer(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a PTR record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupAuthority(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an SOA record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupNull(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a NULL record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupWellKnownServices(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a WKS record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupService(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an SRV record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupHostInfo(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a HINFO record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupMailboxInfo(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an MINFO record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupText(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a TXT record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupSenderPolicy(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a SPF record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupResponsibility(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an RP record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupAFSDatabase(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform an AFSDB record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupZone(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

overridden in twisted.names.authority.FileAuthority, twisted.names.client.Resolver

Perform an AXFR record lookup.

NB This is quite different from other DNS requests. See http://cr.yp.to/djbdns/axfr-notes.html for more information.

NB Unlike other lookup* methods, the timeout here is not a list of ints, it is a single int.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	When this timeout expires, the query is considered failed. (type: `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second and third elements are always empty. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupNamingAuthorityPointer(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

Perform a NAPTR record lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def lookupAllRecords(self, name, timeout=None):

from twisted.internet.interfaces.IResolver

overridden in twisted.names.cache.CacheResolver, twisted.names.resolve.ResolverChain

Perform an ALL_RECORD lookup.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	A `Deferred` which fires with a three-tuple of lists of `twisted.names.dns.RRHeader` instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The `Deferred` may instead fail with one of the exceptions defined in `twisted.names.error` or with `NotImplementedError`. (type: `Deferred`)

def getHostByName(self, name, timeout=None, effort=10):

from twisted.internet.interfaces.IResolverSimple

Resolve the domain name name into an IP address.

Parameters	name	DNS name to resolve. (type: `bytes` or `str`)
	timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of `int`)
Returns	The callback of the Deferred that is returned will be passed a string that represents the IP address of the specified name, or the errback will be called if the lookup times out. If multiple types of address records are associated with the name, A6 records will be returned in preference to AAAA records, which will be returned in preference to A records. If there are multiple records of the type to be returned, one will be selected at random. (type: `twisted.internet.defer.Deferred`)
Raises	twisted.internet.defer.TimeoutError	Raised (asynchronously) if the name cannot be resolved within the specified timeout period.

def _cbRecords(self, records, name, effort):

Undocumented

API Documentation for twisted, generated by pydoctor at 2020-03-25 17:34:30.

twisted.names.common.ResolverBase class documentation

`twisted.names.common.ResolverBase` class documentation