Building Next-Generation Web APIs with JSON-LD and Hydra
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Presented at the Symfony Live Portland 2013 in Portland (Oregon), USA The recording of the talk is available at http://bit.ly/sl-portland2013-video
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Building Next-Generation Web APIs with JSON-LD and Hydra
- 1. Building Next-Gen Web APIs with JSON-LD and Hydra Markus Lanthaler
- 2. Why do we need a website? Of course we have a website Why do we need an API? 1995 2000 2005 2010 Of course we have an API Adapted from T. Vitvar’s and J. Musser’s ECOWS 2010 Keynote, “ProgrammableWeb.com:Statistics, Trends, and Best Practices”
- 4. Using Web APIs is still challenging
- 6. Level 0:The Swamp of POX Level 1: Resources Level 2: HTTPVerbs
- 8. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z" } http://example.com/issues/cso29ax
- 10. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z" } http://example.com/issues/cso29ax http://example.com/issue/{id}/comments/
- 12. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 13. Level 0:The Swamp of POX Level 1: Resources Level 2: HTTPVerbs Level 3: Hypermedia Controls
- 14. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 15. Every API is a snowflake
- 16. Result: tightly coupled & brittle systems
- 17. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 18. { 69 64: 63 73 6f 32 39 61 78 74 69 74 6c 65: 53 79 6d 66 6f 6e 79 20 4c 69 76 … 64 65 73 63 72 69 70 74 69 6f 6e: 50 72 65 70 61 … 69 73 5f 6f 70 65 6e: 01 63 72 65 61 74 65 64 5f 61 74: 32 30 31 32 2d 31 … 63 6f 6d 6d 65 6e 74 73: 2f 69 73 73 75 65 73 2f … } http://example.com/issues/cso29ax
- 19. Identifiers on the Web: URIs
- 20. Linked Data Principles Tim Berners-Lee, 2006
- 21. JSON-LD
- 23. Make data self-descriptive by mapping concepts to URLs
- 24. { "id": "markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 25. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": "http://schema.org/url" }, "id": "markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 26. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": "http://schema.org/url" }, "@id": "/people/markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 27. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": "http://schema.org/url" }, "@id": "/people/markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 28. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": "http://schema.org/url" }, "@id": "/people/markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": { "@id": "http://www.markus-lanthaler.com/" } }
- 29. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": { "@id": "http://schema.org/url", "@type": "@id" }, }, "@id": "/people/markus", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 30. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": { "@id": "http://schema.org/url", "@type": "@id" } }, "@id": "/people/markus", "@type": "http://schema.org/Person", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 32. { "@context": { "firstname": "http://schema.org/givenName", "lastname": "http://schema.org/familyName", "homepage": { "@id": "http://schema.org/url", "@type": "@id" } }, "@id": "/people/markus", "@type": "http://schema.org/Person", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 33. { "@context": "/contexts/person.jsonld", "@id": "/people/markus", "@type": "http://schema.org/Person", "firstname": "Markus", "lastname": "Lanthaler", "homepage": "http://www.markus-lanthaler.com/" }
- 34. CMF
- 37. { "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 38. { "@context": "/ctx/context.jsonld", "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 39. { "@context": "/ctx/context.jsonld", "id": "cso29ax", "title": "Symfony Live Portland 2013", "description": "Prepare slides", "is_open": true, "created_at": "2012-11-26T04:49:44Z", "comments": "/issues/cso29ax/comments/" } http://example.com/issues/cso29ax
- 40. { "@id": "#comments", "@type": "hydra:Link", "supportedOperations": [ { "@id": "#create-comment", "@type": "hydra:CreateResourceOperation", "label": "Creates a new comment", "method": "POST", "expects": "#Comment", "returns": "#Comment" } ] } http://example.com/api/doc
- 41. { "@id": "#Comment", "@type": "hydra:Class", "supportedProperties": [ { "property": "#text", "required": true, "readonly": false, "writeonly": false } ] } http://example.com/api/doc
- 44. /** * An Issue tracked by the system. * * @HydraExpose() */ class Issue { /** * The comments associated with this issue * * @HydraExpose() * @HydraCollection("issue_comments") * @HydraOperations("issue_comment_create") */ private $comments; // ... other members and methods ... }
- 45. $ php app/console hydra:generate:crud --entity=MLDemoBundle:Issue --route-prefix=/issues/ --with-write --no-interaction CRUD generation Generating the CRUD code: OK You can now start using the generated code!
- 46. /** * Issue controller * * @Route("/issues") */ class IssueController extends HydraController { /** * Creates a new Issue * * @Route("/", name="issue_create") * @Method("POST") * * @HydraOperation(expect = "MLDemoBundleEntityIssue") * * @return MLDemoBundleEntityIssue */ public function collectionPostAction(Request $request) { ...
- 49. Hydra Console
- 54. © 2013, Markus Lanthaler. Some Rights Reserved. http://creativecommons.org/licenses/by-nc-sa/3.0/ Thank You
- 56. Image Credits (1) http://www.flickr.com/photos/justinwkern/3729649672/ (2) http://www.flickr.com/photos/alexdram/3095419858/ (3) http://www.flickr.com/photos/kaptainkobold/3203311346/ (11) http://info.cern.ch/hypertext/WWW/TheProject.html (15) Adapted from http://www.flickr.com/photos/nebarnix/361650027/ (16) http://www.flickr.com/photos/joyoflife/1570126182/ (19) http://www.flickr.com/photos/rossiprojects/5592552858/ (21) http://www.flickr.com/photos/rossiprojects/5592552858/ (23) http://www.flickr.com/photos/clevercupcakes/4397152402/ (31) http://schema.org/Person (36) http://www.vonwong.com/ (42) http://www.flickr.com/photos/jakecaptive/3205277810/ (47) http://www.flickr.com/photos/sis/126152933/