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From: Jeremy Evans <code@jeremyevans.net>
To: Eric Wong <e@80x24.org>
Cc: unicorn-public@bogomips.org
Subject: Re: Support default_middleware configurator method
Date: Thu, 13 Sep 2018 17:00:26 -0700	[thread overview]
Message-ID: <20180914000026.GG48926@jeremyevans.local> (raw)
In-Reply-To: <20180913223407.GA44494@ailurophile>

On 09/13 10:34, Eric Wong wrote:
> Jeremy Evans <code@jeremyevans.net> wrote:
> > I was originally looking for a way to turn off default middleware
> > without having to specify the -N command line option every time.
> > After reading the Unicorn.builder code, I thought it may be
> > possible to do this by specifying the option as an embedded option
> > in the rackup file, via the following line at the top of the file:
> > 
> > #\-N
> > 
> > Unfortunately, while this works for many other command line options,
> > because of Unicorn's internals, this doesn't work for -N, as
> > embedded options are not parsed until after the check for skipping
> > default middleware is made.
> 
> That was intentional, I think.  We should never be encouraging
> users to pollute config.ru and make it difficult to migrate/test
> other servers.
> 
> > This patch makes the embedded -N option work, as well as adds a
> > default_middleware configuration file option
> 
> I really hate the -N vs RACK_ENV=none redundancy...  Is -N still
> needed for Rails or something else while keeping RACK_ENV unset?

I use RACK_ENV to configure the environment for my web applications, and
for a few reasons have used development/test/production as the
environment names.  I try as much as possible to have the development
environment mirror the production environment unless there is a good
reason to be different, and would like to avoid adding all of the
middleware Unicorn adds in development mode.

Additionally, let's say I want to add Rack::CommonLogger to both
development and production environments.  So in my config.ru, I add:

  use Rack::CommonLogger, Logger.new($stderr)

Now I load up the development version.  Then I have two common loggers
in development, with all requests being logged twice.  I currently
work around this by doing something like:

  unless ENV['RACK_ENV'] == 'development'
    use Rack::CommonLogger, Logger.new($stderr)
  end

I would like to avoid having to do that.

> Worse case is we only support default_middleware as a config
> option (but I prefer not to add more options).  Embedded -N support
> is an anti-feature which leads to lock-in.

I don't really care about embedded -N support.  I actually didn't even
know embedded command file options were possible until I saw the
comment in Unicorn.builder.  I just want some way to specify not to
load default middleware without requiring a command line option each
time.

Thanks,
Jeremy

  reply	other threads:[~2018-09-14  0:00 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-13 19:20 Jeremy Evans
2018-09-13 22:34 ` Eric Wong
2018-09-14  0:00   ` Jeremy Evans [this message]
2018-09-14 10:56     ` Eric Wong
2018-09-14 15:03       ` Jeremy Evans
2018-09-19  7:39         ` Eric Wong
2018-09-21  0:21           ` Jeremy Evans
2018-09-23  8:52             ` Eric Wong
2018-09-21  0:34           ` [PATCH 2/1] tests: ensure -N/--no-default-middleware not supported in config.ru Eric Wong

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