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2011-04-18documentation cleanup/reduction
Don't clutter up our RDoc/website with things that users of Unicorn don't need to see. This should make user-relevant documentation easier to find, especially since Unicorn is NOT intended to be an API.
2011-02-02socket_helper: cleanup leftover debugging statement
Oops! Ugh, not my day...
2011-02-02socket_helper: export tcp_name as a module_function
Oops!
2011-02-02allow binding on IPv6 sockets with listen "[#{addr}]:#{port}"
This is much like how nginx does it, except we always require a port when explicitly binding to IPv6 using the "listen" directive. This also adds support to listen with an address-only, which can be useful to Rainbows! users.
2011-01-31force socket options to defaults if unspecified
This reduces surprise when people (correctly) believe removing an option from the config file will return things back to our internal defaults.
2011-01-31enable TCP_NOPUSH/TCP_CORK by default
It's actually harmless since Unicorn only supports "fast" applications that do not trickle, and we don't do keepalive so we'll always flush-on-close. This should reduce wakeups on the nginx proxy server if nginx is over TCP. Mongrel 1.x had TCP_CORK enabled by default, too.
2011-01-05socket_helper: expose more defaults in DEFAULTS hash
This will allow Rainbows! to set :tcp_nodelay=>true and possibly other things in the future.
2010-10-05start using kgio, the kinder, gentler I/O library
This should hopefully make the non-blocking accept() situation more tolerable under Ruby 1.9.2.
2010-10-04avoid unlinking actively listening sockets
While we've always unlinked dead sockets from nuked/leftover processes, blindly unlinking them can cause unnecessary failures when an active process is already listening on them. We now make a simple connect(2) check to ensure the socket is not in use before unlinking it. Thanks to Jordan Ritter for the detailed bug report leading to this fix. ref: http://mid.gmane.org/8D95A44B-A098-43BE-B532-7D74BD957F31@darkridge.com
2010-07-06socket_helper: disable documentation for internals
2010-07-06socket_helper: cleanup FreeBSD accf_* detection
Instead of detecting at startup if filters may be used, just try anyways and log the error. It is better to ask for forgiveness than permission :)
2010-07-06socket_helper: no reason to check for logger method
We only use this module in HttpServer and our unit test mocks it properly.
2010-07-06socket_helper: move defaults to the DEFAULTS constant
This is to allow Rainbows! to override the defaults.
2010-07-03socket_helper: tunables for tcp_defer_accept/accept_filter
Under Linux, this allows users to tune the time (in seconds) to defer connections before allowing them to be accepted. The behavior of TCP_DEFER_ACCEPT changed with Linux 2.6.32 and idle connections may still be accept()-ed after the specified value in seconds. A small value of '1' remains the default for Unicorn as Unicorn does not worry about slow clients. Higher values provide better DoS protection for Rainbows! but also increases kernel memory usage. Allowing "dataready" for FreeBSD accept filters will allow SSL sockets to be used in the future for HTTPS, too.
2010-04-30add global Unicorn.listener_names method
This is useful as a :listeners argument when setting up Raindrops::Middleware (http://raindrops.bogomips.org/), as it can be done automatically.
2009-11-15socket_helper: RDoc for constants
2009-11-15socket_helper: do not hide errors when setting socket options
Since they're all optional, make them non-fatal, but make sure we log them so we can diagnose what (if anything) is going wrong.
2009-11-14configurator: listen :umask parameter for UNIX sockets
Typically UNIX domain sockets are created with more liberal file permissions than the rest of the application. By default, we create UNIX domain sockets to be readable and writable by all local users to give them the same accessibility as locally-bound TCP listeners. This only has an effect on UNIX domain sockets. This was inspired by Suraj Kurapati in cfbcd2f00911121536rd0582b8u961f7f2a8c6e546a@mail.gmail.com
2009-09-30cleanup: use question mark op for 1-byte comparisons
It's compatible with both Ruby 1.8 and 1.9 without needing a Range object.
2009-09-16socket_helper: (FreeBSD) don't freeze the accept filter constant
We may add support for the Gopher protocol in the future...
2009-09-08"encoding: binary" comments for all sources (1.9)
This ensures any string literals that pop up in *our* code will just be a bag of bytes. This shouldn't affect/fix/break existing apps in most cases, but most constants will always have the "correct" encoding (none!) to be consistent with HTTP/socket expectations. Since this comment affects things only on a per-source basis, it won't affect existing apps with the exception of strings we pass to the Rack application. This will eventually allow us to get rid of that Unicorn::Z constant, too.
2009-07-01Re-add support for non-portable socket options
Now that we support tunnelling arbitrary protocols over HTTP as well as "100 Continue" responses, TCP_NODELAY actually becomes useful to us. TCP_NODELAY is actually reasonably portable nowadays; even. While we're adding non-portable options, TCP_CORK/TCP_NOPUSH can be enabled, too. Unlike some other servers, these can't be disabled explicitly/intelligently to force a flush, however. However, these may still improve performance with "normal" HTTP applications (Mongrel has always had TCP_CORK enabled in Linux). While we're adding OS-specific features, we might as well support TCP_DEFER_ACCEPT in Linux and FreeBSD the "httpready" accept filter to prevent abuse. These options can all be enabled on a per-listener basis.
2009-04-21rename socket.rb => socket_helper.rb
We no longer have anything outside of SocketHelper module in that file, so just give it a more obvious name.