Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Introduction to Webmachine

Sponsored · SiteGround - Reliable hosting with speed, security, and support you can count on. →
Avatar for Jade Allen Jade Allen
October 16, 2013
Technology
0
120

Introduction to Webmachine

Webmachine is a toolkit to build REST APIs implemented in Erlang.

Avatar for Jade Allen

Jade Allen

October 16, 2013
Tweet

More Decks by Jade Allen

See All by Jade Allen
All About Regular Expressions
Avatar for Jade Allen jadeallenx
1
270
Hexes, Charms and Spells
Avatar for Jade Allen jadeallenx
0
170
3 > 2
Avatar for Jade Allen jadeallenx
0
1.1k
Idiomatic Erlang
Avatar for Jade Allen jadeallenx
0
170
The Sharp Edges of Leaky Abstractions
Avatar for Jade Allen jadeallenx
0
110
Sagas: Distributed Transactions Without Locks
Avatar for Jade Allen jadeallenx
0
580
Before Unix: Early History of Time-Sharing
Avatar for Jade Allen jadeallenx
0
230
Functional Programming Made Me a Better Perl Developer
Avatar for Jade Allen jadeallenx
1
360
Assigning Meanings to Programs
Avatar for Jade Allen jadeallenx
0
250

Other Decks in Technology

See All in Technology
CDKで始めるTypeScript開発のススメ
Avatar for つくぼし tsukuboshi
1
310
小さく始めるBCP ― 多プロダクト環境で始める最初の一歩
Avatar for kekke-n kekke_n
1
340
15 years with Rails and DDD (AI Edition)
Avatar for Andrzej Krzywda andrzejkrzywda
0
170
予期せぬコストの急増を障害のように扱う――「コスト版ポストモーテム」の導入とその後の改善
Avatar for Masahiro Yoshizawa muziyoshiz
1
1.5k
レガシー共有バッチ基盤への挑戦 - SREドリブンなリアーキテクチャリングの取り組み
Avatar for Konishi tatsuhiro tatsukoni
0
200
Introduction to Bill One Development Engineer
Avatar for Sansan, Inc. sansan33
PRO
0
360
2026年、サーバーレスの現在地 -「制約と戦う技術」から「当たり前の実行基盤」へ- /serverless2026
Avatar for Serverless Operations slsops
2
210
GitHub Issue Templates + Coding Agentで簡単みんなでIaC/Easy IaC for Everyone with GitHub Issue Templates + Coding Agent
Avatar for AEON aeonpeople
1
170
~Everything as Codeを諦めない~ 後からCDK
Avatar for mu7889yoon / Yuta Nakamura mu7889yoon
3
260
プロポーザルに込める段取り八分
Avatar for ShoheiMitani shoheimitani
0
160
Contract One Engineering Unit 紹介資料
Avatar for Sansan, Inc. sansan33
PRO
0
13k
モダンUIでフルサーバーレスなAIエージェントをAmplifyとCDKでサクッとデプロイしよう
Avatar for みのるん minorun365
2
130

Featured

See All Featured
Leo the Paperboy
Avatar for Maya Tellez mayatellez
4
1.4k
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
Avatar for Sara Fernández Carmona sarafernandez
0
110
Google's AI Overviews - The New Search
Avatar for Barry Adams badams
0
900
Helping Users Find Their Own Way: Creating Modern Search Experiences
Avatar for Dan Newman danielanewman
31
3.1k
Designing for humans not robots
Avatar for Tammie Lister tammielis
254
26k
CSS Pre-Processors: Stylus, Less & Sass
Avatar for Bermon Painter bermonpainter
359
30k
Reality Check: Gamification 10 Years Later
Avatar for Sebastian Deterding codingconduct
0
2k
New Earth Scene 8
Avatar for Sydney Stone popppiees
1
1.5k
The Cult of Friendly URLs
Avatar for Andy Hume andyhume
79
6.8k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
Avatar for Eileen M. Uchitelle eileencodes
26
3.3k
Neural Spatial Audio Processing for Sound Field Analysis and Control
Avatar for NII S. Koyama's Lab skoyamalab
0
160
Leadership Guide Workshop - DevTernity 2021
Avatar for David Neal reverentgeek
1
200

Transcript

  1. Introduction to Webmachine! ! ! Mark Allen! [email protected]! @bytemeorg! http://byte-me.org!

    https://github.com/mrallen1!

  2. HTTP is complicated!

  3. None

  4. Abstraction!

  5. Toolkit!

  6. A gentle introduction! to Erlang!

  7. Sincerely flattered!

  8. dj-webmachine! (python)!

  9. webmachine.rb! (ruby)!

  10. webmachine.js! (node)!

  11. liberator! (clojure)!

  12. scalamachine! (scala)!

  13. Framework!

  14. Framework!

  15. None

  16. Hello World! Resource!

  17. -module(hello_world_resource). -export([init/1, to_html/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) -> {ok, "Hello, world"}. to_html(Req,

    State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}.

  18. -module(hello_world_resource). -export([init/1, to_html/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) -> {ok, "Hello, world"}. to_html(Req,

    State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}.

  19. -module(hello_world_resource). -export([init/1, to_html/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) -> {ok, "Hello, world"}. to_html(Req,

    State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}.

  20. Conditional GET!

  21. -module(hello_world_resource). -export([init/1, to_html/2, generate_etag/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) -> {ok, "Hello, world"}.

    to_html(Req, State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}. generate_etag(Req, State) -> {mochihex:to_hex(crypto:md5(State)), Req, State}.

  22. Encoding Support!

  23. -module(hello_world_resource). -export([init/1, to_html/2, generate_etag/2]). -export([encodings_provided/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) -> {ok, "Hello,

    world"}. to_html(Req, State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}. generate_etag(Req, State) -> {mochihex:to_hex(crypto:md5(State)), Req, State}. encodings_provided(Req, State) -> {[{"gzip", fun(X) -> zlib:gzip(X) end}], Req, State}.
  24. None

  25. Content Negotiation!

  26. -module(hello_world_resource). -export([init/1, to_html/2, to_json/2, generate_etag/2]). -export([encodings_provided/2, content_types_provided/2]). -include_lib("webmachine/include/webmachine.hrl"). init([]) ->

    {ok, "Hello, world"}. content_types_provided(Req, State) -> {[{"text/html", to_html}, {"application/json", to_json}], Req, State}. to_json(Req, State) -> {mochijson2:encode({struct, [{greeting, list_to_binary(State)}]}), Req, State}. to_html(Req, State) -> {io_lib:format("<html><head><title>~s</title></ head><body>~s</body></html>", [State, State]), Req, State}. %% ...
  27. None

  28. Resource! Implementation! Pattern!

  29. f(Req, State) -> {RetVal, Req, State}.

  30. Manipulating! Requests or Responses!

  31. wrq:get_req_header(HeaderName, Req) -> 'undefined' | HeaderValue

  32. wrq:set_resp_header( HeaderName, HeaderValue, Req) -> NewReq.

  33. to_json(Req, State) -> {mochijson2:encode({struct, [{greeting, list_to_binary(State)}]} ), wrq:set_resp_header( "Content-Type", "application/json",

    Req), State}.
  34. None

  35. Visual Debugging!

  36. None

  37. curl -v -Haccept:application/xml 127.0.0.1:8000

  38. Basic URL Dispatch!

  39. {["a"], some_resource, []}

  40. {["a"], some_resource, []}

  41. {["a"], some_resource, []}

  42. Fancy URL Dispatch!

  43. % The atom '*' is a wildcard {["a", '*'], some_resource,

    []} % matches /a/b/c or /a/b/c/d

  44. % bind 2nd element to 'foo' {["a", foo], some_resource, []}

    % retrieve with % wrq:path_info(foo, Req) % URL of /a/b returns "b"

  45. % bind 2nd element to 'foo' {["a", foo], some_resource, []}

    % /a/b/c/d => 404 Not Found

  46. % dispatch /a/b/c/d {["a", foo, '*'], some_resource, []}

  47. Handling POST!

  48. •  allowed_methods/2 •  post_is_create/2 •  create_path/2 •  content_types_accepted/2 •  handler

    functions!

  49. Other cool stuff:! •  Streaming requests/ responses! •  File uploads!

  50. Resources:! •  https://github.com/basho/webmachine! •  https://github.com/mrallen1/wm_hello! •  https://speakerdeck.com/mrallen1/ intro_to_webmachine!

  51. Thank you!! ! Questions?!