twisted.names.client.Resolver

Package twisted :: Package names :: Module client :: Class Resolver

Class Resolver

ResolverBase --+
               |
              Resolver

Method Summary
	`__init__(self, resolv, servers, timeout)`
	`__getstate__(self)`
	`__setstate__(self, state)`
	`_lookup(self, name, cls, type, timeout)`
	`_reissue(self, reason, address, query, timeout)`
	`connectionMade(self, protocol)`
	`filterAnswers(self, message)`
	`lookupZone(self, name, timeout)`
	`maybeParseConfig(self)`
	`messageReceived(self, message, protocol, address)`
	`parseConfig(self, resolvConf)`
	`pickServer(self)` Return the address of a nameserver.
`Deferred`	`queryTCP(self, queries, timeout)` Make a number of DNS queries via TCP.
`Deferred` @raise `twisted.internet.defer.TimeoutError`: When the query times out.	`queryUDP(self, queries, timeout)` Make a number of DNS queries via UDP.
Inherited from ResolverBase
	`_cbRecords(self, (ans, auth, add), name, effort)`
	`getHostByName(self, name, timeout, effort)`
	`lookupAddress(self, name, timeout)`
	`lookupAddress6(self, name, timeout)`
	`lookupAFSDatabase(self, name, timeout)`
	`lookupAllRecords(self, name, timeout)`
	`lookupAuthority(self, name, timeout)`
	`lookupCanonicalName(self, name, timeout)`
	`lookupHostInfo(self, name, timeout)`
	`lookupIPV6Address(self, name, timeout)`
	`lookupMailBox(self, name, timeout)`
	`lookupMailboxInfo(self, name, timeout)`
	`lookupMailExchange(self, name, timeout)`
	`lookupMailGroup(self, name, timeout)`
	`lookupMailRename(self, name, timeout)`
	`lookupNameservers(self, name, timeout)`
	`lookupNull(self, name, timeout)`
	`lookupPointer(self, name, timeout)`
	`lookupResponsibility(self, name, timeout)`
	`lookupService(self, name, timeout)`
	`lookupText(self, name, timeout)`
	`lookupWellKnownServices(self, name, timeout)`
	`query(self, query, timeout)`

Class Variable Summary
`tuple`	`__implements__` = `(<class twisted.internet.interfaces.IRe...`
`NoneType`	`_lastResolvTime` = None
`int`	`_resolvReadInterval` = 60
`NoneType`	`connections` = None
`tuple`	`dynServers` = `()`
`NoneType`	`factory` = None
`int`	`index` = 0
`NoneType`	`pending` = None
`NoneType`	`protocol` = None
`NoneType`	`resolv` = None
`NoneType`	`servers` = None
`NoneType`	`timeout` = None
Inherited from ResolverBase
`NoneType`	`typeToMethod` = None

Method Details

init(self, resolv=None, servers=None, timeout=(1, 3, 11, 45))
(Constructor)

Parameters:: resolv - Filename to read and parse as a resolver(5) configuration file.
(type=str); servers - If not None, interpreted as a list of addresses of domain name servers to attempt to use for this lookup. Addresses should be in dotted-quad form. If specified, overrides resolv.
(type=list of (str, int) or None); timeout - Default number of seconds after which to reissue the query. When the last timeout expires, the query is considered failed.
(type=Sequence of int)

Raises:: ValueError - Raised if no nameserver addresses can be found.

Overrides:: twisted.names.common.ResolverBase.__init__

pickServer(self)

Return the address of a nameserver.

TODO: Weight servers for response time so faster ones can be preferred.

queryTCP(self, queries, timeout=10)

Make a number of DNS queries via TCP.

Parameters:: queries - The queries to make.
(type=Any non-zero number of dns.Query instances); timeout - The number of seconds after which to fail.
(type=int)

Returns:: Deferred

queryUDP(self, queries, timeout=None)

Make a number of DNS queries via UDP.

Parameters:: queries - The queries to make.
(type=A list of dns.Query instances); 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:: Deferred @raise twisted.internet.defer.TimeoutError: When the query times out.

Class Variable Details

implements

Type:: tuple
Value:: (<class twisted.internet.interfaces.IResolver at 0x81732a4>,)

_lastResolvTime

Type:: NoneType
Value:: None

_resolvReadInterval

Type:: int
Value:: 60

connections

Type:: NoneType
Value:: None

dynServers

Type:: tuple
Value:: ()

factory

Type:: NoneType
Value:: None

index

Type:: int
Value:: 0

pending

Type:: NoneType
Value:: None

protocol

Type:: NoneType
Value:: None

resolv

Type:: NoneType
Value:: None

servers

Type:: NoneType
Value:: None

timeout

Type:: NoneType
Value:: None

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