curl.sh

$ curl -H 'accept-encoding: gzip, deflate, br' localhost:8080/posts

development.log

Started GET "/posts" for 127.0.0.1 at 2018-11-04 13:17:23 +0000
Processing by PostsController#index as */*
  Rendering posts/index.html.erb within layouts/application
request.class ActionDispatch::Request
SCRIPT_NAME: 
QUERY_STRING: 
SERVER_PROTOCOL: HTTP/1.1
SERVER_SOFTWARE: puma 3.12.0 Llamas in Pajamas
GATEWAY_INTERFACE: CGI/1.2
REQUEST_METHOD: GET
REQUEST_PATH: /posts
REQUEST_URI: /posts
HTTP_VERSION: HTTP/1.1
HTTP_HOST: localhost:8080
HTTP_USER_AGENT: curl/7.53.1
HTTP_ACCEPT: */*
HTTP_ACCEPT_ENCODING: gzip, deflate, br
SERVER_NAME: localhost
SERVER_PORT: 8080
PATH_INFO: /posts
REMOTE_ADDR: 127.0.0.1
rack.url_scheme: http
action_dispatch.secret_key_base: a8e9f9e41cf9f4ace56abc1f84a22fd1
action_dispatch.http_auth_salt: http authentication
action_dispatch.signed_cookie_salt: signed cookie
action_dispatch.encrypted_cookie_salt: encrypted cookie
action_dispatch.encrypted_signed_cookie_salt: signed encrypted cookie
action_dispatch.authenticated_encrypted_cookie_salt: authenticated encrypted cookie
ROUTES_47353250709780_SCRIPT_NAME: 
ORIGINAL_FULLPATH: /posts
ORIGINAL_SCRIPT_NAME: 
action_dispatch.request_id: 8761c15a-86f5-4eec-aed9-512ff7455db3
rack.request.query_string: 
  Post Load (0.2ms)  SELECT "posts".* FROM "posts"
  ↳ app/views/posts/index.html.erb:15
  Rendered posts/index.html.erb within layouts/application (1.5ms)
Completed 200 OK in 19ms (Views: 15.5ms | ActiveRecord: 0.2ms)

posts_helper.rb

module PostsHelper
  def foobar
    puts "request.class #{request.class}" # ActionDispatch::Request
    request.headers.each do |k,v|
      if v.is_a?(String)
        puts "#{k}: #{v}"
      end
    end
  end
end