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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.
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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
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It's compatible with both Ruby 1.8 and 1.9 without
needing a Range object.
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We may add support for the Gopher protocol in the future...
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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.
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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.
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We no longer have anything outside of SocketHelper module in
that file, so just give it a more obvious name.
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