Release History

See the release procedure section for more details on version numbering and how releases are made.

Version 2.0.x

2.0.1 (2016-03-17) [Download]

Remove incorrect calls to old (pre-2.0.0) logging API. Thanks to Tim-Oliver Husser & Tim Staley.

Reformat documentation to add Acknowledgements.

2.0.0 (2016-01-31) [Download]

Switch dependency from ipaddr-py to py2-ipaddress. The latter is a backport of the Python 3 functionality, so this helps clear the way for an eventual Python 3 version of Comet.

Use the $TMPDIR environment variable, if set, to store the event database. Otherwise, fall back to tmp.

Drop support for Python 2.6, following the same change made in Twisted.

Improve checking for valid IVORNs.

Some extremely old versions of Comet (dating from before the 1.0.0 release) used a different format for the database of seen events. All released versions through 1.2.2 automatically update old-style databases to the new format when run. As of this release, this support for legacy databases has been dropped. It is necessary to use a previous Comet release to update the database format before upgrading to this version.

Refactor the codebase caused a minor API change: logging facilities are now available from the comet.log module. End user code — notably event handling plugins — should replace statements to the effect of from comet.utility import log with import comet.log as log. The convenience aliases log.msg and log.warning have been removed: use and log.warn instead.

Version 1.2.x

1.2.2 (2015-04-20) [Download]

Disable XML entity expansion for documents received from the network. This eliminates a class of potential resource exhaustion attacks.

Update documentation to request citation of the paper in published work which makes use of Comet.

1.2.1 (2014-09-02) [Download]
Correctly check that the (required) --local-ivo command line option was provided (GitHub #35).
1.2.0 (2014-08-26) [Download]

When subscribing to a remote broker, we wait for a short period after the initial connection is made before marking it as successful. This means that if the broker rapidly drops the connection (e.g. due to an authentication failure), we retry the connection with an exponential back-off rather than an immediate reconnection (GitHub #29).

Timestamps in iamalive messages are marked as being in UTC.

authenticate messages which specify XPath filters are schema compliant (GitHub #31).

Subscriber refuses to start if an XPath --filter is specified with invalid syntax (GitHub #33).

Require that a valid IVOA identifier (IVORN) be supplied by the end user when starting Comet rather than relying on a default.

Require that events submitted to the broker by authors have valid IVORNs.

Version 1.1.x

1.1.2 (2014-08-26) [Download]
Fix a bug which could result in malformed event IVORNs exhausting the available resources and ultimately rendering Comet unable to process more events (GitHub #34).
1.1.1 (2014-07-08) [Download]

Fix a bug which could result in the same VOEvent message being processed multiple times (GitHub #30).

Add compatibility with DBM-style databases which do not provide an .items() method.

1.1.0 (2014-02-26) [Download]

Improved documentation.

Interval between broadcast test events is user configurable, and they may be disabled. See the --broadcast-test-interval option.

Test events now include details of the version of Comet used to generate them.

Event handler plugin system reworked. Plugins may now take command line options. See the event handler documentation for details. Note that the syntax for invoking the print-event handler has changed (now --print-event rather than --action=print-event).

Plugin which writes events received to file (--save-event).

Version 1.0.x

1.0.4 (2013-11-13) [Download]
comet-sendvo will choose its Python interpreter based on the environment.
1.0.3 (2013-11-12) [Download]
Update so that requirements.txt is included in the distribution. This changes nothing on an installed system.
1.0.2 (2013-11-12) [Download]
Add a requirements.txt file and specify the installation requirements in This makes installation easier, but changes nothing on an installed system.
1.0.1 (2012-08-28) [Download]
Fix for badly formed XML Transport element.
1.0.0 (2012-08-27) [Download]
Initial public release

Future Plans

  • Cryptographic authentication of VOEvent messages and subscribers.
  • Port to Python 3.