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![defmodule HelloPhoenix.Router do
use HelloPhoenix.Web, :router
!
pipeline :browser do
plug :accepts, ["html"]
plug :fetch_session
plug :fetch_flash
plug :protect_from_forgery
plug :put_secure_browser_headers
end
!
pipeline :api do
plug :accepts, ["json"]
end
!
scope "/", HelloPhoenix do
pipe_through :browser
!
get "/", PageController, :index
end
!
# ...
end
Poor HTTP support](https://image.slidesharecdn.com/beyond-phoenix-160521165531/85/Beyond-Phoenix-15-320.jpg)
![defmodule Chat.RoomChannel do
use Phoenix.Channel
!
# ...
!
def handle_in("new:msg", msg, socket) do
broadcast! socket, "new:msg", %{user: msg["user"], body: msg["body"]}
{:reply, {:ok, %{msg: msg["body"]}}, assign(socket, :user, msg["user"])}
end
end
Bidirectional sockets
Reinventing HTTP over WS
• error conditions
• response status
• chaching
• …⚠](https://image.slidesharecdn.com/beyond-phoenix-160521165531/85/Beyond-Phoenix-16-320.jpg)
![Embrace HTTP
#-module(ping_resource).
-compile([export_all]).
-include_lib("webmachine/include/webmachine.hrl").
!
init(Config) ->
{ok, empty}.
!
content_types_provided(Request, State) ->
{[{"text/html", to_html}, {"text/plain", to_text}], Request, State}.
!
allowed_methods(Request, State) ->
{['GET', 'HEAD'], Request, State}.
!
to_html(Request, State) ->
Response = "<html><body>PONG</body></html>"
{Response, Request, State}.
!
to_text(Request, State) ->
Response = "PONG"
{Response, Request, State}.](https://image.slidesharecdn.com/beyond-phoenix-160521165531/85/Beyond-Phoenix-20-320.jpg)
![Flip dependencies
#defmodule Ping.Resource do
use HTTP.Resource
!
route "/counter/:id"
!
def init(conn), do: {:ok, conn, %{}}
!
def allowed_methods(conn, state), do: ["GET", "POST"]
!
def exists?(conn, {id, state}), do: {id, state |> Map.has_key?(id)}
def exists?(conn, state), do: {p(conn, :id), state}
!
def retrieve(conn, {id, state}), do: {id, state |> Map.get(id)}
!
def create(conn, {id, state}), do: {id, state |> Map.update!(id, &(&1 + 1))}
!
@content_type "text/plain"
def to_text(conn, {id, state}), do: {id, state |> Map.get(id)}
end
HTTP
APPLICATION](https://image.slidesharecdn.com/beyond-phoenix-160521165531/85/Beyond-Phoenix-21-320.jpg)
![Go stateful
#go
[ self chooseCheese.
self confirmCheese
] whileFalse.
self informCheese
!
chooseCheese
cheese := self
chooseFrom: #('Greyerzer' 'Tilsiter' 'Sbrinz')
caption: 'What''s your favorite Cheese?'.
cheese isNil ifTrue: [ self chooseCheese ]
!
confirmCheese
^ self confirm: 'Is ', cheese, 'your favorite Cheese?'
!
informCheese
self inform: 'Your favorite is ', cheese, '.'
is a continuation-based
web application framework](https://image.slidesharecdn.com/beyond-phoenix-160521165531/85/Beyond-Phoenix-24-320.jpg)
Uploaded byGabriele Lana
Beyond Phoenix
This document discusses embracing HTTP and changing approaches to web application development. It suggests flipping dependencies so that applications are built around HTTP rather than frameworks. It also recommends taking a more stateful approach by going CQRS/ES rather than relying on CRUD and resources. The document questions common patterns and promotes thinking beyond frameworks to more fundamental concepts.
More Related Content
Beyond Phoenix
- 1.
- 2.
- 4. You are here Youshould be here
- 5.
- 6. Ecto is not yourModel — Michał Muskała “ ”Member of the Ecto core team maintainer of the MongoDB adapter.
- 7. Be defensive atyour boundaries, trust your internals DATA VALIDATION INTERNALS Validation at storage boundary leads to an anemic domain model
- 8. Why do youstick everything in a database? “ ”— Joe Armstrong
- 9. MicroservicesDo you needa storage abstraction? Your storage must be independent from the storage of other services and the storage must be close to your problem, so my answer is no It′s an abstraction or just indirection?
- 10. Phoenix is not your application —Lance Halvorsen “ ”P of the Phoenix Guides.
- 11.
- 12. Framework? APPLICATION PHOENIX A framework mustmake decisions. You cannot make good or bad decisions without a context If you are not ruling that's ok, but better be worth it
- 13. OTP How many Phoenix applicationsin the wild have at least one generic server?
- 14.
- 15. defmodule HelloPhoenix.Router do useHelloPhoenix.Web, :router ! pipeline :browser do plug :accepts, ["html"] plug :fetch_session plug :fetch_flash plug :protect_from_forgery plug :put_secure_browser_headers end ! pipeline :api do plug :accepts, ["json"] end ! scope "/", HelloPhoenix do pipe_through :browser ! get "/", PageController, :index end ! # ... end Poor HTTP support
- 16. defmodule Chat.RoomChannel do usePhoenix.Channel ! # ... ! def handle_in("new:msg", msg, socket) do broadcast! socket, "new:msg", %{user: msg["user"], body: msg["body"]} {:reply, {:ok, %{msg: msg["body"]}}, assign(socket, :user, msg["user"])} end end Bidirectional sockets Reinventing HTTP over WS • error conditions • response status • chaching • …⚠
- 17. CRUD resources? Server siderendering? Flash messages? Generators?
- 18.
- 19.
- 20. Embrace HTTP #-module(ping_resource). -compile([export_all]). -include_lib("webmachine/include/webmachine.hrl"). ! init(Config) -> {ok,empty}. ! content_types_provided(Request, State) -> {[{"text/html", to_html}, {"text/plain", to_text}], Request, State}. ! allowed_methods(Request, State) -> {['GET', 'HEAD'], Request, State}. ! to_html(Request, State) -> Response = "<html><body>PONG</body></html>" {Response, Request, State}. ! to_text(Request, State) -> Response = "PONG" {Response, Request, State}.
- 21. Flip dependencies #defmodule Ping.Resourcedo use HTTP.Resource ! route "/counter/:id" ! def init(conn), do: {:ok, conn, %{}} ! def allowed_methods(conn, state), do: ["GET", "POST"] ! def exists?(conn, {id, state}), do: {id, state |> Map.has_key?(id)} def exists?(conn, state), do: {p(conn, :id), state} ! def retrieve(conn, {id, state}), do: {id, state |> Map.get(id)} ! def create(conn, {id, state}), do: {id, state |> Map.update!(id, &(&1 + 1))} ! @content_type "text/plain" def to_text(conn, {id, state}), do: {id, state |> Map.get(id)} end HTTP APPLICATION
- 22. Flip dependencies # var express= require('express') var app = express() ! app.get('/ping', (req, res) => { res.send('pong') }) ! app.listen(3000, () => { console.log('Listening on port 3000') })
- 23.
- 24. Go stateful #go [ selfchooseCheese. self confirmCheese ] whileFalse. self informCheese ! chooseCheese cheese := self chooseFrom: #('Greyerzer' 'Tilsiter' 'Sbrinz') caption: 'What''s your favorite Cheese?'. cheese isNil ifTrue: [ self chooseCheese ] ! confirmCheese ^ self confirm: 'Is ', cheese, 'your favorite Cheese?' ! informCheese self inform: 'Your favorite is ', cheese, '.' is a continuation-based web application framework
- 25.
- 26.