Perl - IO::Async - version 0.41

Wow; seems I haven't been writing these posts as much as I should be. I last wrote about version 0.34, and just now I've uploaded version 0.41 to CPAN. Quite a bit changed between then and now, here's a rundown of the most important bits:

  • Added IO::Async::FileStream. This behaves like a read-only IO::Async::Stream, but reads its data from a regular file on the filesystem. Like tail -f, or File::Tail, it watches the file for changes in size, and follows appended data.

  • Added IO::Async::Function. This is a true IO::Async::Notifier subclass to represent an asynchronous block of code; which was previously handled by DetachedCode. Being a true Notifier subclass gives it many advantages, and should provide a better base to build other things on. IO::Async::Resolver is now a subclass of Function, not DetachedCode.

  • Added IO::Async::Process. This is another IO::Async::Notifier subclass, this time to represent an external process.

  • Support encoding parameter in IO::Async::Stream. This allows the Stream to handle text in some encoding, rather than simply raw bytes.

  • Support first_interval parameter to IO::Async::Timer::Periodic. If supplied, this will be the first wait time when the timer is started. In particular, if it is zero the timer's first invocation will happen immediately.

  • Allow Loop->listen to be extended via extensions, similar to ->connect. Such extensions as IO::Async::SSL are already set up to make use of this.

  • Distribution now uses Test::Fatal rather than Test::Exception. The former is smaller and simpler, whereas the latter relies on clever tricks to hack on caller(), which sometimes breaks some setups.

  • Added convenient method in IO::Async::Loop for handling socket addresses; extract_addrinfo. This recognises strings for common networking constants; 'inet', 'inet6' and 'unix' as socket families, 'stream', 'dgram' and 'raw' as socket types. These convenient forms are also recognised by the ->connect and ->listen methods.

  • Now prefers to use the IPv6 support functions found in Perl 5.14's Socket module; only falling back to using Socket::GetAddrInfo in earlier perls.

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