twisted.names.cache.CacheResolver

class documentation

class CacheResolver(common.ResolverBase): (source)

A resolver that serves records from a local, memory cache.

Method	`__getstate__`	Undocumented
Method	`__init__`	Undocumented
Method	`__setstate__`	Undocumented
Method	`cacheResult`	Cache a DNS entry.
Method	`clearEntry`	Undocumented
Method	`lookupAllRecords`	Perform an ALL_RECORD lookup.
Instance Variable	`__dict__`	Undocumented
Instance Variable	`cache`	Undocumented
Instance Variable	`cancel`	Undocumented
Instance Variable	`verbose`	Undocumented
Method	`_lookup`	Undocumented
Instance Variable	`_reactor`	A provider of `interfaces.IReactorTime`.

Inherited from ResolverBase:

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

def __getstate__(self): (source)

Undocumented

def __init__(self, cache=None, verbose=0, reactor=None): (source)

overrides twisted.names.common.ResolverBase.__init__

Undocumented

def __setstate__(self, state): (source)

Undocumented

def cacheResult(self, query, payload, cacheTime=None): (source)

Cache a DNS entry.

Parameters
query	a `dns.Query` instance.
payload	a 3-tuple of lists of `dns.RRHeader` records, the matching result of the query (answers, authority and additional).
cacheTime	The time (seconds since epoch) at which the entry is considered to have been added to the cache. If `None` is given, the current time is used.

def clearEntry(self, query): (source)

Undocumented

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

from twisted.internet.interfaces.IResolver

overrides twisted.names.common.ResolverBase.lookupAllRecords

Perform an ALL_RECORD lookup.

Parameters
name	DNS name to resolve.
timeout	Number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed.
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`.

__dict__ = (source)

Undocumented

cache: dict = (source)

Undocumented

cancel: dict = (source)

Undocumented

verbose = (source)

Undocumented

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

overrides twisted.names.common.ResolverBase._lookup

Undocumented

_reactor = (source)

A provider of interfaces.IReactorTime.