twisted.names.srvconnect.SRVConnector : API documentation

Instance Variable	servers	List of candidate server records for future connection attempts. (type: `list` of `dns.Record_SRV`)
Instance Variable	orderedServers	List of server records that have already been tried in this round of connection attempts. (type: `list` of `dns.Record_SRV`)
Method	__init__
Method	connect	Start connection to remote server.
Method	pickServer	Pick the next server.
Method	stopConnecting	Stop attempting to connect.
Method	disconnect	Disconnect whatever our are state is.
Method	getDestination	Return destination this will try to connect to.
Method	connectionFailed	Undocumented
Method	connectionLost	Undocumented
Method	_ebGotServers	Undocumented
Method	_cbGotServers	Undocumented
Method	_ebServiceUnknown	Connect to the default port when the service name is unknown.
Method	_reallyConnect	Undocumented

servers =

List of candidate server records for future connection attempts. (type: list of dns.Record_SRV)

orderedServers =

List of server records that have already been tried in this round of connection attempts. (type: list of dns.Record_SRV)

def __init__(self, reactor, service, domain, factory, protocol='tcp', connectFuncName='connectTCP', connectFuncArgs=(), connectFuncKwArgs={}, defaultPort=None): (source)

Parameters	domain	The domain to connect to. If passed as a unicode string, it will be encoded using `idna` encoding. (type: `bytes` or `unicode`)
	defaultPort	Optional default port number to be used when SRV lookup fails and the service name is unknown. This should be the port number associated with the service name as defined by the IANA registry. (type: `int`)

def connect(self): (source)

from twisted.internet.interfaces.IConnector

Start connection to remote server.

def _ebGotServers(self, failure): (source)

Undocumented

def _cbGotServers(self, result): (source)

Undocumented

def _ebServiceUnknown(self, failure): (source)

Connect to the default port when the service name is unknown.

If no SRV records were found, the service name will be passed as the port. If resolving the name fails with error.ServiceNameUnknownError, a final attempt is done using the default port.

def pickServer(self): (source)

Pick the next server.

This selects the next server from the list of SRV records according to their priority and weight values, as set out by the default algorithm specified in RFC 2782.

At the beginning of a round, servers is populated with orderedServers, and the latter is made empty. servers is the list of candidates, and orderedServers is the list of servers that have already been tried.

First, all records are ordered by priority and weight in ascending order. Then for each priority level, a running sum is calculated over the sorted list of records for that priority. Then a random value between 0 and the final sum is compared to each record in order. The first record that is greater than or equal to that random value is chosen and removed from the list of candidates for this round.

Returns A tuple of target hostname and port from the chosen DNS SRV record. (type: tuple of native str and int)

def _reallyConnect(self): (source)

Undocumented

def stopConnecting(self): (source)

from twisted.internet.interfaces.IConnector

Stop attempting to connect.

def disconnect(self): (source)

from twisted.internet.interfaces.IConnector

Disconnect whatever our are state is.

def getDestination(self): (source)

from twisted.internet.interfaces.IConnector

Return destination this will try to connect to.

Returns An object which provides IAddress.

def connectionFailed(self, reason): (source)

Undocumented

def connectionLost(self, reason): (source)

Undocumented

twisted.names.srvconnect.SRVConnector class documentation

`twisted.names.srvconnect.SRVConnector` class documentation