Request Syntax Request Parameters Response Syntax Response Elements Errors Examples See Also

GetSchema

Retrieve the details for the specified schema in the specified policy store.

Request Syntax


{
   "policyStoreId": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

Note

In the following list, the required parameters are described first.

policyStoreId

Specifies the ID of the policy store that contains the schema.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 200.

Pattern: [a-zA-Z0-9-]*

Required: Yes

Response Syntax


{
   "createdDate": "string",
   "lastUpdatedDate": "string",
   "namespaces": [ "string" ],
   "policyStoreId": "string",
   "schema": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

createdDate

The date and time that the schema was originally created.

Type: Timestamp

lastUpdatedDate

The date and time that the schema was most recently updated.

Type: Timestamp

policyStoreId

The ID of the policy store that contains the schema.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 200.

Pattern: [a-zA-Z0-9-]*

schema

The body of the schema, written in Cedar schema JSON.

Type: String

Length Constraints: Minimum length of 1.

namespaces

The namespaces of the entities referenced by this schema.

Type: Array of strings

Length Constraints: Minimum length of 0. Maximum length of 100.

Pattern: .*

Errors

For information about the errors that are common to all actions, see Common Errors.

AccessDeniedException

You don't have sufficient access to perform this action.

HTTP Status Code: 400

InternalServerException

The request failed because of an internal error. Try your request again later

HTTP Status Code: 500

ResourceNotFoundException

The request failed because it references a resource that doesn't exist.

HTTP Status Code: 400

ThrottlingException

The request failed because it exceeded a throttling quota.

HTTP Status Code: 400

ValidationException

The request failed because one or more input parameters don't satisfy their constraint requirements. The output is provided as a list of fields and a reason for each field that isn't valid.

The possible reasons include the following:

UnrecognizedEntityType

The policy includes an entity type that isn't found in the schema.
UnrecognizedActionId

The policy includes an action id that isn't found in the schema.
InvalidActionApplication

The policy includes an action that, according to the schema, doesn't support the specified principal and resource.
UnexpectedType

The policy included an operand that isn't a valid type for the specified operation.
IncompatibleTypes

The types of elements included in a set, or the types of expressions used in an if...then...else clause aren't compatible in this context.
MissingAttribute

The policy attempts to access a record or entity attribute that isn't specified in the schema. Test for the existence of the attribute first before attempting to access its value. For more information, see the has (presence of attribute test) operator in the Cedar Policy Language Guide.
UnsafeOptionalAttributeAccess

The policy attempts to access a record or entity attribute that is optional and isn't guaranteed to be present. Test for the existence of the attribute first before attempting to access its value. For more information, see the has (presence of attribute test) operator in the Cedar Policy Language Guide.
ImpossiblePolicy

Cedar has determined that a policy condition always evaluates to false. If the policy is always false, it can never apply to any query, and so it can never affect an authorization decision.
WrongNumberArguments

The policy references an extension type with the wrong number of arguments.
FunctionArgumentValidationError

Cedar couldn't parse the argument passed to an extension type. For example, a string that is to be parsed as an IPv4 address can contain only digits and the period character.

HTTP Status Code: 400

Examples

Example

The following example retrieves the current schema stored in the specified policy store.

Note

The JSON in the parameters of this operation are strings that can contain embedded quotation marks (") within the outermost quotation mark pair. When you are calling the API directly, using a tool like the AWS CLI or Postman, you have to stringify the JSON object by preceding all embedded quotation marks with a backslash character ( \" ) and combining all lines into a single text line with no line breaks.

Example strings are displayed wrapped across multiple lines here for readability, but the operation requires the parameters be submitted as single line strings.

Sample Request


POST HTTP/1.1
Host: verifiedpermissions.us-east-1.amazonaws.com
X-Amz-Date: 20230613T200059Z
Accept-Encoding: identity
X-Amz-Target: VerifiedPermissions.GetSchema
User-Agent: <UserAgentString>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>
Content-Length: <PayloadSizeBytes>

{
    "policyStoreId": "PSEXAMPLEabcdefg111111"
}

Sample Response


HTTP/1.1 200 OK
Date: Tue, 13 Jun 2023 20:00:59 GMT
Content-Type: application/x-amz-json-1.0
Content-Length: <PayloadSizeBytes>
vary: origin
vary: access-control-request-method
vary: access-control-request-headers
x-amzn-requestid: a1b2c3d4-e5f6-a1b2-c3d4-EXAMPLE11111
Connection: keep-alive

{
    "policyStoreId":"PSEXAMPLEabcdefg111111",
    "schema": "{
        \"My::Application\": {
            \"actions\": {
                \"remoteAccess\": {
                    \"appliesTo\": {
                        \"principalTypes\": [\"Employee\"]
                    }
                }
            },
            \"entityTypes\": {
                \"Employee\": {
                    \"shape\": {
                        \"attributes\": {
                            \"jobLevel\": { \"type\": \"Long\" },
                            \"name\": { \"type\":\"String\" }
                        },
                        \"type\": \"Record\"
                    }
                }
            }
        }
    }",
    "createdDate": "2023-05-18T14:46:35.020571Z",
    "lastUpdatedDate":"2023-05-23T16:48:20.95041Z"
}