Help Center/ Simple Message Notification/ API Reference/ APIs/ Message Publishing/ Publishing a Message

Updated on 2023-02-13 GMT+08:00

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Publishing a Message

Function

This API is used to publish messages 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. 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

URI

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

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Specifies the project ID.For details about how to obtain the project ID, see Obtaining the Project ID.
topic_urn	Yes	String	Specifies the resource identifier of the topic, which is unique. To obtain the resource identifier, see Querying Topics.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Specifies a user token. It can be obtained by calling an IAM API. The value of X-Subject-Token in the response header is the user token.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
subject	No	String	Specifies the message subject, which is used as the email subject when you publish email messages. The length of the subject cannot exceed 512 bytes.
message	No	String	Specifies the message content. The message content must be UTF-8-coded and can be no more than 256 KB. If the endpoint is a phone number that exceeds 490 characters, SMN will cut it off. The SMS message cannot contain square brackets ([]).For application subscribers, messages must comply with format requirements of the mobile push platform. For details, see the format of the application message body. Otherwise, the mobile app will fail to receive messages. HMS, APNS, and APNS_SANDBOX mobile push platforms are supported.Note:Three message formats are supported:messagemessage_structuremessage_template_nameAt least one of them must be set. If they are set at the same time, the effective priority ismessage_structure > message_template_name > message
message_structure	No	String	Specifies the message structure, which contains JSON strings. email, sms, http, https, dms, functionstage, HMS, APNS, or APNS_SANDBOX are supported. For details about HMS, APNS, and APNS_SANDBOX message formats, see the format of the application message body. The default protocol is mandatory. If the system fails to match any other protocols, the message using the default protocol is sent.Note:Three message formats are supported:messagemessage_structuremessage_template_nameAt least one of them must be set. If they are set at the same time, the effective priority ismessage_structure > message_template_name > messageHMS transparent push message{ "hps": { "msg": { "type": 1, "body": { "key": "value" } } }}Huawei notification push message{ "hps": { "msg": { "type": 3, "body": { "content": "Push message content", "title": "Push message content" }, "action": { "type": 1, "param": { "intent": "#Intent;compo=com.rvr/.Activity;S.W=U;end" } } }, "ext": { "biTag": "Trump", "icon": "http://upload.w.org/00/150pxsvg.png" } }}Apple platform message{ "aps": { "alert": "hello world" }}
message_template_name	No	String	Specifies the message template name. To obtain the name, see Querying Message Templates.Note:Three message formats are supported:messagemessage_structuremessage_template_nameAt least one of them must be set. If they are set at the same time, the effective priority ismessage_structure > message_template_name > message
tags	No	Map<String,String>	Specifies the dictionary consisting of variable parameters and values. The value 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 contains 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	Specifies the maximum retention period of a message in SMN. After the retention period expires, SMN does not send this message. Unit: second Default value: 3600s (one hour) The retention period must be a positive integer less than or equal to 86,400 (3600 x 24).

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
message_id	String	Specifies the message ID, which is unique.

Status code: 400

**Table 5** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
code	String	Specifies the error code.
message	String	Describes the error message.

Status code: 403

**Table 6** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
code	String	Specifies the error code.
message	String	Describes the error message.

Status code: 404

**Table 7** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
code	String	Specifies the error code.
message	String	Describes the error message.

Status code: 429

**Table 8** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
code	String	Specifies the error code.
message	String	Describes the error message.

Status code: 500

**Table 9** Response body parameters
Parameter	Type	Description
request_id	String	Specifies the request ID, which is unique.
code	String	Specifies the error code.
message	String	Describes the error message.

Example Requests

Publishing a message

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

{
  "subject" : "test message v2",
  "message" : "Message test message v2",
  "time_to_live" : "3600"
}

Publishing messages using a message structure

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

{
  "subject" : "test message v2",
  "message_structure" : "{\n  \"default\": \"xxx\",\n  \"APNS\": \"{\\\"aps\\\":{\\\"alert\\\":{\\\"title\\\":\\\"xxx\\\",\\\"body\\\":\\\"xxx\\\"}}}\"\n}",
  "time_to_live" : "3600"
}

Publishing messages using a template

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"
  }
}

Example Responses

Status code: 200

{
  "request_id" : "6a63a18b8bab40ffb71ebd9cb80d0085",
  "message_id" : "bf94b63a5dfb475994d3ac34664e24f2"
}

Status Codes

Status Code	Description
200	OK
400	Bad Request
403	Unauthorized
404	Not Found
429	Too Many Requests
500	Internal Server Error

Error Codes

See Error Codes.

Parent topic: Message Publishing

Previous topic: Message Publishing

Next topic: Version Querying

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