Checking for the presence of an object: the HEAD method

Checking for the presence of the object is carried out by the method HEAD, with the class code with its namespace and the value of the object key, for example rest/crud/class_string@develop-and-test/66dbb3d0-5583-11e6-aef7-cf50314f026b

curl -X HEAD -u demo@local:ion-demo https://dnt.iondv.com/rest/crud/class_string@develop-and-test/66dbb3d0-5583-11e6-aef7-cf50314f026b

An example of a request to the crud service to check the presence of an object in dnt: test/modules/rest/crud.spec.js

/Checking crud service/HEAD/# checking if an object is present (HEAD)

If the object exists, the response code “200”is returned, if the object is not found - 404, if there are no permissions - 403.