Building better clients

Transcript

1. BUILDING BETTER CLIENTS
2. BEN LONGDEN CTO Inviqa Enterprise open source
3. @BLONGDEN
4. There are two types of client
5. MACHINE DRIVEN
6. HUMAN DRIVEN
7. WHAT'S THE PROBLEM?
8. We're getting quite good better at building RESTful API's on the server side.
9. But what about our clients?
10. Do they allow the API to change?
11. Consider the web browser.
12. What would the browser do? — Brian Sletten
13. Supports the most common media types.
14. application/x-shockwave-flash
15. Versioning
16. HTML
17. We're not building a web browser
18. But we can be inspired
19. CONTENT NEGOTIATION (CONNEG)
20. Send what your client will accept
21. Accept: application/hal+json, text/plain
22. Check what the server sends back
23. Content-Type: application/hal+json
24. Allow clients to support new media types when they become available
25. Accept: application/hal+json, application/ vnd.error+json, text/plain;q=0.9
26. USE AN HTTP CLIENT
27. CACHEING
28. URLS
29. Remember that any GET request can be bookmarked by a client
30. But also that it could result in a redirect
31. GUZZLE ▸ Cacheing ▸ Logging ▸ Oauth
32. HYPERMEDIA CONSTRAINT
33. Hypermedia is defined by the presence of application control information embedded within, or as a layer above, the presentation of information — Roy Fielding
34. LINK RELATIONS POSSIBLE STATES
35. CONTEXT
36. { "_links": { "self": { "href": "/comment/3864362" } }, "content": "lol" }
37. { "_links": { "edit": { "href": "/comment/3864362" }, "self": { "href": "/comment/3864362" } }, "content": "lol" }
39. CLIENT CAN EVOLVE INDEPENDENTLY
41. Futureproof?
42. DESIGN OF EVERYDAY THINGS
43. Form a goal
44. Intention to act
45. Sequence of actions
46. Execution of the sequence of action
47. Perceive the state of the world
48. Interpret the perception
49. Evaluate the outcome
51. Why am I talking about this?
52. A hypermedia client works in much the same way
53. Let the server be in control
54. Use content negotiation to allow clients to evolve
55. Use an HTTP client and turn on cacheing
56. Drive human interaction through hypermedia controls
58. QUESTIONS! (or ask me at the bar later)