Updating a Topic Policy

Description

• API name

  UpdateTopicAttribute

• Function

  Update a topic policy.

URI

• URI format

  PUT /v2/{project_id}/notifications/topics/{topic_urn}/attributes/{name}

• Parameter description

  Parameter	Mandatory	Type	Description
  project_id	Yes	String	Project ID See Obtaining a Project ID.
  topic_urn	Yes	String	Unique resource ID of a topic. You can obtain it by referring to Querying Topics.
  name	Yes	String	Specifies the policy name. Only specified policy names are supported. For details, see Topic Attribute List.

Request

• Parameter description

  Parameter	Mandatory	Type	Description
  value	Yes	String	Topic attribute value If you set name to access_policy, value is the topic attributes, and the maximum length of value is 30 KB. If you set name to introduction, value is the topic introduction, and the maximum length of value is 120 bytes. For details, see Table 1.

  Table 1 Topic attribute values

  Parameter	Description	Constraint
  Version	Policy specification version	Only 2016-09-07 is supported.
  Id	Policy ID, which uniquely identifies a policy	Id must be specified.
  Statement	Statements used to configure a topic policy. Each topic policy may contain one or more statements. You can use statements to grant topic permissions to other users or cloud services.	A policy must contain at least one statement. For details about elements in a statement, see Table 2.

  Table 2 Statement elements description

  Element	Description	Constraint
  Sid	Statement ID	The statement ID must be unique, for example, statement01 or statement02.
  Effect	Statement effect	The effect can be Allow or Deny.
  Principal NotPrincipal	Principal: object to which the statement applies NotPrincipal: object to which the statement does not apply The following two types of objects are supported: CSP: one or more cloud users Service: one or more cloud services	Either the Principal or NotPrincipal element must be configured. If you enter CSP, you must specify user information in the format urn:csp:iam::domainId:root. Obtain the account ID of each user you specify. If you enter Service, you must specify the cloud service names in lower case.
  Action NotAction	Action: allowed statement action NotAction: statement action not allowed You can use a wildcard character to configure a set of actions, for example, SMN:Update* and SMN:Delete*. If you only enter a wildcard character (*) in a statement, all supported actions are allowed.	Either Action or NotAction must be configured. The following actions are supported: SMN:UpdateTopic SMN:DeleteTopic SMN:QueryTopicDetail SMN:ListTopicAttributes SMN:UpdateTopicAttribute SMN:DeleteTopicAttributes SMN:DeleteTopicAttributeByName SMN:ListSubscriptionsByTopic SMN:Subscribe SMN:Unsubscribe SMN:Publish
  Resource	Specifies the topic the statement applies to.	Either Resource or NotResource must be configured. You need to enter a topic URN.
  NotResource	Specifies the topic the statement does not apply to.	Either Resource or NotResource must be configured. You need to enter a topic URN.

• Example request

  PUT https://{SMN_Endpoint}/v2/{project_id}/notifications/topics/{topic_urn}/attributes/access_policy

  {
     "value": "{
           \"Version\": \"2016-09-07\", 
           \"Id\": \"__default_policy_ID\", 
           \"Statement\": [
              {
                \"Sid\": \"__user_pub_0\",
                \"Effect\": \"Allow\",
                \"Principal\": {
                  \"CSP\": [
                          \"urn:csp:iam::{domainID}:root\"
                         ]
                   },
                \"Action\": [\"SMN:Publish\",\"SMN:QueryTopicDetail\"],
                \"Resource\": \"{topic_urn}\"
                },
                {
                \"Sid\": \"__service_pub_0\", 
                \"Effect\": \"Allow\",
                \"Principal\": {
                   \"Service\": [\"obs\"]
                   },
                \"Action\": [\"SMN:Publish\",\"SMN:QueryTopicDetail\"],
                \"Resource\": \"{topic_urn}\"
                }
               ]
            }"
    }

  

  Replace {project_id}, {domainID}, and {topic_urn} with the actual values.

  domainID indicates the user's account ID. To obtain it, log in to the SMN console, click My Credentials in the username drop-down list on the upper right.

Response

• Parameter description

  Parameter	Type	Description
  request_id	String	Request ID, which is unique

• Example response

  {
      "request_id":"6837531fd3f54550927b930180a706bf"
  }

Returned Value

See Returned Value.

Error Codes

See Error Codes.