Typical Elixir Phoenix Plug.Conn struct contents, in an easy-to-read format. By Jamon Holmgren.

plug.conn.ex

%Plug.Conn{
  adapter: {Plug.Adapters.Cowboy.Conn, :...},
  assigns: %{
    my_assigns: "here"
  },
  before_send: [
    #Function<7.125546534/1 in Phoenix.Controller.fetch_flash/2>,
    #Function<1.127904613/1 in Plug.Session.before_send/2>,
    #Function<1.43511252/1 in Plug.Logger.call/2>,
    #Function<0.70322810/1 in Phoenix.LiveReloader.before_send_inject_reloader/1>
  ],
  body_params: %{},
  cookies: %{
   "my_cookie" => "whatever",
  },
  halted: false,
  host: "localhost",
  method: "GET",
  owner: #PID<0.810.0>,
  params: %{},
  path_info: [],
  peer: {{127, 0, 0, 1}, 53135},
  port: 4000,
  private: %{
    MyApp.Router => {[], %{}},
    :phoenix_action => :index,
    :phoenix_controller => MyApp.PageController,
    :phoenix_endpoint => MyApp.Endpoint,
    :phoenix_flash => %{},
    :phoenix_format => "html",
    :phoenix_layout => {MyApp.LayoutView, :app},
    :phoenix_pipelines => [:browser],
    :phoenix_route => #Function<26.115114952/1 in MyApp.Router.match_route/4>,
    :phoenix_router => MyApp.Router,
    :phoenix_view => MyApp.PageView,
    :plug_session => %{"current_user" => %MyApp.User{...}},
    :plug_session_fetch => :done
  },
  query_params: %{},
  query_string: "",
  remote_ip: {127, 0, 0, 1},
  req_cookies: %{
    "_myapp_key" => "asdfjasdf=",
  },
  req_headers: [
    {"host", "localhost:4000"},
    {"connection", "keep-alive"},
    {"cache-control", "max-age=0"},
    {"accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"},
    {"upgrade-insecure-requests", "1"},
    {"user-agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36"},
    {"referer", "http://localhost:4000/"},
    {"accept-encoding", "gzip, deflate, sdch"},
    {"accept-language", "en-US,en;q=0.8"},
    {"cookie", "referrer=; _myapp_key=asdfjasdf="}
  ],
  request_path: "/",
  resp_body: nil,
  resp_cookies: %{},
  resp_headers: [
    {"cache-control", "max-age=0, private, must-revalidate"},
    {"x-request-id", "asdf"},
    {"x-frame-options", "SAMEORIGIN"},
    {"x-xss-protection", "1; mode=block"},
    {"x-content-type-options", "nosniff"}, {"access-control-allow-origin", "*"}
  ],
  scheme: :http,
  script_name: [],
  secret_key_base: "asdf",
  state: :unset,
  status: nil
}