TemporaryPathCredentialsService¶

TemporaryPathCredentialsService is an API service of UnityCatalogServer to handle HTTP requests at /api/2.1/unity-catalog/temporary-path-credentials URL.

Method	URL	Handler	Params
POST	`/`	generateTemporaryPathCredential	JSON-ified `GenerateTemporaryPathCredential`

TemporaryPathCredentialsService handles POST requests only with the following authorization guarantees:

Method	AuthorizeExpression	Securables
POST	authorize(#principal, #metastore, OWNER)	METASTORE

Demo¶

etc/conf/server.properties

The following demo requires url being configured in etc/conf/server.properties (usings3.bucketPath.0=s3://uc-japila and the others).

$ http http://localhost:8081/api/2.1/unity-catalog/temporary-path-credentials \
    url=s3://uc-japila \
    operation=PATH_CREATE_TABLE
HTTP/1.1 200 OK
content-length: 1198
content-type: application/json
date: Sat, 2 Nov 2024 19:51:29 GMT
server: Armeria/1.28.4

{
    "aws_temp_credentials": {
        "access_key_id": "xxx",
        "secret_access_key": "xxx",
        "session_token": "xxx"
    },
    "azure_user_delegation_sas": null,
    "expiration_time": null,
    "gcp_oauth_token": null
}

Creating Instance¶

TemporaryPathCredentialsService takes the following to be created:

CredentialOperations

TemporaryPathCredentialsService is created when:

UnityCatalogServer is requested to register the API services

Generate Temporary Path Credentials¶

HttpResponse generateTemporaryPathCredential(
  GenerateTemporaryPathCredential generateTemporaryPathCredential)

generateTemporaryPathCredential requests this CredentialOperations to vendCredential for the url and operation properties (of the given GenerateTemporaryPathCredential).

Internal Server Error

operation should be one of the supported path operations or Unity Catalog reports an internal error.

Privileges by Path Operation¶

Set<CredentialContext.Privilege> pathOperationToPrivileges(
  PathOperation pathOperation)

pathOperationToPrivileges converts the given PathOperation to Privileges:

PathOperation	Privileges
`PATH_READ`	`SELECT`
`PATH_READ_WRITE`	`SELECT`, `UPDATE`
`PATH_CREATE_TABLE`	`SELECT`, `UPDATE`
`UNKNOWN_PATH_OPERATION`	(empty)