Go to the latest version of this document.

# ``twisted`.`names`.`dns`.`Record_SRV``

class documentation

`class Record_SRV(tputil.FancyEqMixin, tputil.FancyStrMixin): (source)`

Constructor: `Record_SRV(priority, weight, port, target, ttl)`

Implements interfaces: `twisted.names.dns.IEncodableRecord`

View In Hierarchy

The location of the server(s) for a specific protocol and domain.

This is an experimental record type.

See Also
http://www.faqs.org/rfcs/rfc2782.html

Method | `__hash__` | Undocumented
Method | `__init__` | No summary
Method | `decode` | Reconstruct an object from data read from the given file object.
Method | `encode` | Write a representation of this object to the given file object.
Class Variable | `compareAttributes` | Undocumented
Class Variable | `fancybasename` | Undocumented
Class Variable | `showAttributes` | Undocumented
Instance Variable | `port` | The port on this target host of this service.
Instance Variable | `priority` | The priority of this target host. A client MUST attempt to contact the target host with the lowest-numbered priority it can reach; target hosts with the same priority SHOULD be tried in an order defined by the weight field.
Instance Variable | `target` | The domain name of the target host. There MUST be one or more address records for this name, the name MUST NOT be an alias (in the sense of RFC 1034 or RFC 2181). Implementors are urged, but not required, to return the address record(s) in the Additional Data section...
Instance Variable | `ttl` | The maximum number of seconds which this record should be cached.
Instance Variable | `weight` | Specifies a relative weight for entries with the same priority. Larger weights SHOULD be given a proportionately higher probability of being selected.

Inherited from `FancyEqMixin`:

Method | `__eq__` | Undocumented
Method | `__ne__` | Undocumented

Inherited from `FancyStrMixin` (via `FancyEqMixin`):

Method | `__str__` | Undocumented

def __hash__(self): (source)

Undocumented

def __init__(self, priority=0, weight=0, port=0, target=b'', ttl=None): (source)

Parameters
priority | Undocumented
weight | Undocumented
port | Undocumented
target:`bytes` or `str` | See `Record_SRV.target`
ttl | Undocumented

def decode(self, strio, length=None): (source)
from `twisted.names.dns.IEncodable`

Reconstruct an object from data read from the given file object.

Parameters
strio:File-like object | A seekable buffer from which bytes may be read.
length:`int` or `None` | The number of bytes in this RDATA field. Most implementations can ignore this value. Only in the case of records similar to TXT where the total length is in no way encoded in the data is it necessary.

def encode(self, strio, compDict=None): (source)
from `twisted.names.dns.IEncodable`

Write a representation of this object to the given file object.

Parameters
strio:File-like object | The buffer to write to. It must have a `tell()` method.
compDict:`dict` of `bytes` to `int` r `None` | A mapping of names to byte offsets that have already been written to the buffer, which may be used for compression (see RFC 1035 section 4.1.4). When `None`, encode without compression.

compareAttributes: `tuple[str, ...]` = (source)
overrides `twisted.python.util.FancyEqMixin.compareAttributes`

Undocumented

fancybasename: `str` = (source)

Undocumented

showAttributes: `tuple` = (source)
overrides `twisted.python.util.FancyStrMixin.showAttributes`

Undocumented

port: `int` = (source)

The port on this target host of this service.

priority: `int` = (source)

The priority of this target host. A client MUST attempt to contact the target host with the lowest-numbered priority it can reach; target hosts with the same priority SHOULD be tried in an order defined by the weight field.

target: `Name` = (source)

The domain name of the target host. There MUST be one or more address records for this name, the name MUST NOT be an alias (in the sense of RFC 1034 or RFC 2181). Implementors are urged, but not required, to return the address record(s) in the Additional Data section. Unless and until permitted by future standards action, name compression is not to be used for this field.

ttl: `int` = (source)

The maximum number of seconds which this record should be cached.

weight: `int` = (source)

Specifies a relative weight for entries with the same priority. Larger weights SHOULD be given a proportionately higher probability of being selected.