class documentation

class twisted.names.resolve.ResolverChain(common.ResolverBase): (source)

Implements interfaces: twisted.internet.interfaces.IResolver

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Lookup an address using multiple IResolvers

Method __init__
Instance Variable resolvers Undocumented
Method lookupAllRecords Perform an ALL_RECORD lookup.
Method _lookup Build a dns.Query for the given parameters and dispatch it to each IResolver in self.resolvers until an answer or error.AuthoritativeDomainError is returned.

Inherited from ResolverBase:

Instance Variable typeToMethod 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 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.
Class Variable _log Undocumented
Method _cbRecords Undocumented
def __init__(self, resolvers): (source)
ParametersresolversA list of IResolver providers. (type: list)
resolvers = (source)

Undocumented

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

Build a dns.Query for the given parameters and dispatch it to each IResolver in self.resolvers until an answer or error.AuthoritativeDomainError is returned.

ParametersnameDNS name to resolve. (type: str)
clsDNS record class. (type: int)
typeDNS record type. (type: int)
timeoutNumber of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of int)
ReturnsA 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): (source)

Perform an ALL_RECORD lookup.

ParametersnameDNS name to resolve.
timeoutNumber of seconds after which to reissue the query. When the last timeout expires, the query is considered failed.
ReturnsA 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.
API Documentation for Twisted, generated by pydoctor 20.12.1 at 2021-02-28 19:53:36.