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MiddlewareStackProxy is a proxy for the Rails middleware stack that allows you to configure middlewares in your application. It works basically as a command recorder, saving each command to be applied after initialization over the default middleware stack, so you can add, swap, or remove any middleware in Rails.

You can add your own middlewares by using the config.middleware.use method:

config.middleware.use Magical::Unicorns

This will put the Magical::Unicorns middleware on the end of the stack. You can use insert_before if you wish to add a middleware before another:

config.middleware.insert_before Rack::Head, Magical::Unicorns

There’s also insert_after which will insert a middleware after another:

config.middleware.insert_after Rack::Head, Magical::Unicorns

Middlewares can also be completely swapped out and replaced with others:

config.middleware.swap ActionDispatch::Flash, Magical::Unicorns

Middlewares can be moved from one place to another:

config.middleware.move_before ActionDispatch::Flash, Magical::Unicorns

This will move the Magical::Unicorns middleware before the ActionDispatch::Flash. You can also move it after:

config.middleware.move_after ActionDispatch::Flash, Magical::Unicorns

And finally they can also be removed from the stack completely:

config.middleware.delete ActionDispatch::Flash
Methods
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Attributes

[R] delete_operations
[R] operations

Class Public methods

new(operations = [], delete_operations = [])

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 47 def initialize(operations = [], delete_operations = []) @operations = operations @delete_operations = delete_operations end

Instance Public methods

delete(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 70 def delete(...) @delete_operations << -> middleware { middleware.delete(...) } end

insert(...)

Alias for: insert_before

insert_after(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 58 def insert_after(...) @operations << -> middleware { middleware.insert_after(...) } end

insert_before(...)

Also aliased as: insert

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 52 def insert_before(...) @operations << -> middleware { middleware.insert_before(...) } end

move(...)

Alias for: move_before

move_after(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 80 def move_after(...) @delete_operations << -> middleware { middleware.move_after(...) } end

move_before(...)

Also aliased as: move

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 74 def move_before(...) @delete_operations << -> middleware { middleware.move_before(...) } end

swap(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 62 def swap(...) @operations << -> middleware { middleware.swap(...) } end

unshift(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 84 def unshift(...) @operations << -> middleware { middleware.unshift(...) } end

use(...)

Source: show | on GitHub 

# File railties/lib/rails/configuration.rb, line 66 def use(...) @operations << -> middleware { middleware.use(...) } end