class Startback::Context::Middleware

Rack middleware that installs a particular context instance on the Rack environment.

Examples:

# Use the default context class
Rack::Builder.new do
  use Startback::Context::Middleware

  run ->(env){
    ctx = env[Startback::Context::Middleware::RACK_ENV_KEY]
    ctx.is_a?(Startback::Context) # => true
  }
end

# Use a user defined context class
Rack::Builder.new do
  use Startback::Context::Middleware, context_class: MyContextClass

  run ->(env){
    ctx = env[Startback::Context::Middleware::RACK_ENV_KEY]
    ctx.is_a?(MyContextClass)     # => true (your subclass)
    ctx.is_a?(Startback::Context) # => true (required!)
  }
end

Constants

DEFAULT_OPTIONS
RACK_ENV_KEY

Attributes

options[R]

Public Class Methods

context(env) click to toggle source
# File lib/startback/context/middleware.rb, line 51
def self.context(env)
  env[RACK_ENV_KEY]
end
new(app, options = {}) click to toggle source
# File lib/startback/context/middleware.rb, line 38
def initialize(app, options = {})
  @app = app
  @options = DEFAULT_OPTIONS.merge(options || {})
end

Public Instance Methods

call(env) click to toggle source
# File lib/startback/context/middleware.rb, line 44
def call(env)
  env[RACK_ENV_KEY] ||= options[:context_class].h({}).tap{|c|
    c.original_rack_env = env.dup
  }
  @app.call(env)
end