twisted.names.hosts.Resolver

class documentation

class Resolver(common.ResolverBase): (source)

A resolver that services hosts(5) format files.

Method	`__init__`	Undocumented
Method	`lookupAddress`	Read any IPv4 addresses from `self.file` and return them as `Record_A` instances.
Method	`lookupIPV6Address`	Read any IPv6 addresses from `self.file` and return them as `Record_AAAA` instances.
Instance Variable	`file`	Undocumented
Instance Variable	`ttl`	Undocumented
Method	`_aaaaRecords`	Return a tuple of `dns.RRHeader` instances for all of the IPv6 addresses in the hosts file.
Method	`_aRecords`	Return a tuple of `dns.RRHeader` instances for all of the IPv4 addresses in the hosts file.
Method	`_respond`	Generate a response for the given name containing the given result records, or a failure if there are no result records.

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	`lookupAddress6`	Perform an A6 record lookup.
Method	`lookupAFSDatabase`	Perform an AFSDB record lookup.
Method	`lookupAllRecords`	Perform an ALL_RECORD lookup.
Method	`lookupAuthority`	Perform an SOA record lookup.
Method	`lookupCanonicalName`	Perform a CNAME record lookup.
Method	`lookupHostInfo`	Perform a HINFO 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
Method	`_lookup`	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 __init__(self, file=b'/etc/hosts', ttl=60*60): (source)

overrides twisted.names.common.ResolverBase.__init__

Undocumented

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

from twisted.internet.interfaces.IResolver

overrides twisted.names.common.ResolverBase.lookupAddress

Read any IPv4 addresses from self.file and return them as Record_A instances.

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

from twisted.internet.interfaces.IResolver

overrides twisted.names.common.ResolverBase.lookupIPV6Address

Read any IPv6 addresses from self.file and return them as Record_AAAA instances.

file = (source)

Undocumented

ttl = (source)

Undocumented

def _aaaaRecords(self, name): (source)

Return a tuple of dns.RRHeader instances for all of the IPv6 addresses in the hosts file.

def _aRecords(self, name): (source)

Return a tuple of dns.RRHeader instances for all of the IPv4 addresses in the hosts file.

def _respond(self, name, records): (source)

Generate a response for the given name containing the given result records, or a failure if there are no result records.

Parameters
name:`str`	The DNS name the response is for.
records	A tuple of `dns.RRHeader` instances giving the results that will go into the response.
Returns
A `Deferred` which will fire with a three-tuple of result records, authority records, and additional records, or which will fail with `dns.DomainError` if there are no result records.