Publishing Messages Using a Template

Description

• API name

  Publish

• Function

  Use the message template to publish a message to a topic. After the message ID is returned, the message has been saved and is to be pushed to the subscribers of the topic. This API allows you to send messages to different types of subscribers using the same template name but different protocols.

URI

• URI format

  POST /v2/{project_id}/notifications/topics/{topic_urn}/publish

• 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 the topic. You can obtain it by referring to Querying Topics.

Request

• Parameter description

  Parameter	Mandatory	Type	Description
  subject	No	String	Message subject, which is presented as the email subject when SMN sends messages to email subscribers The message subject cannot exceed 512 bytes.
  message_template_name	Yes	String	Message template name, which can be obtained by referring to Querying Message Templates NOTE: Three message formats are supported: message message_structure message_template_name If the three formats are specified at the same time, they take effect in the following sequence: message_structure>message_template_name>message
  tags	No	Map<String,String>	Variable parameters and values Tags cannot be left blank. This parameter is mandatory when you use a message template to publish messages. The key in the dictionary is the parameter name in the message template and can contain a maximum of 21 characters. The value in the dictionary is the value after the key in the message template is replaced. The value cannot exceed 1 KB.
  time_to_live	No	String	The maximum retention period of a message in SMN After the retention period expires, SMN does not send this message. Unit: second Default retention period: 3600 (one hour) The retention period must be a positive integer less than or equal to 604,800 (3600 x 24 x 7).

• Example request

  POST https://{SMN_Endpoint}/v2/{project_id}/notifications/topics/urn:smn:regionId: f96188c7ccaf4ffba0c9aa149ab2bd57:test_create_topic_v2/publish

  {
      "subject": "test message template v2",
      "message_template_name": "confirm_message",
      "time_to_live": "3600",
      "tags": {
          "topic_urn": "topic_urn3331",
          "topic_id": "topic_id3332"
      }
  }

Response

• Parameter description

  Parameter	Type	Description
  request_id	String	Request ID, which is unique
  message_id	String	Message ID, which is unique

• Example response

  {
      "message_id": "bf94b63a5dfb475994d3ac34664e24f2",
      "request_id": "9974c07f6d554a6d827956acbeb4be5f"
  }

Returned Value

See Returned Value.

Error Codes

See Error Codes.