simonrenoult/http-patch.md

## http-patch.md

      
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              http-patch.md
            
          
    Etant donné la ressource :
GET /articles/1234 HTTP/1.1

HTTP/1.1 200 OK
{ "title": "PUT vs PATCH","tags": ["http", "api", "rest"] }
Si j'exécute plusieurs fois la requête PATCH d'ajout d'un tag via le format JSON Patch (sans l'utilisation d'un etag)
PATCH /articles/1234 HTTP/1.1
Content-Type: application/json-patch+json

[{ "op": "add", "path": "/tags", "value": ["put"] }]
Alors j'aboutis successivement à plusieurs représentations de la ressource :
GET /articles/1234 HTTP/1.1

HTTP/1.1 200 OK
{ "title": "PUT vs PATCH","tags": ["http", "api", "rest", "put" ] }
GET /articles/1234 HTTP/1.1

HTTP/1.1 200 OK
{ "title": "PUT vs PATCH","tags": ["http", "api", "rest", "put", "put"] }
GET /articles/1234 HTTP/1.1

HTTP/1.1 200 OK
{ "title": "PUT vs PATCH","tags": ["http", "api", "rest", "put", "put", "put"] }
Donc cette requête (en l'absence d'etag tout du moins) n'est pas idempotent