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Adding a Subscription

Function

This API is used to add a subscription to a specified topic. If the status of the subscription is unconfirmed, a confirmation message is sent to the subscriber. After confirming the subscription, the subscriber can receive notification messages published to the topic. By default, 10,000 subscriptions can be added to a topic. However, in rare high-concurrency scenarios, extra subscriptions may be added successfully. The API is idempotent. If the added subscription already exists, a successful result and status code 200 are returned. Otherwise, the status code is 201.

Calling Method

For details, see Calling APIs.

URI

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

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

protocol

Yes

String

Subscription protocol. (Different protocols indicate different types of endpoints to receive messages.)

The following protocols are supported:

email: The endpoints are email addresses.

sms: SMS transmission protocol. The endpoints are phone numbers.

functionstage: FunctionGraph(function) transmission protocol. The endpoints are functions.

functiongraph: FunctionGraph(workflow) transmission protocol. The endpoints are FunctionGraph workflows orchestrated by the FunctionGraph function.

http and https: The endpoints are URLs.

callnotify: Voice notification protocol. The endpoints are phone numbers.

wechat: WeCom group chatbot transmission protocol.

dingding: DingTalk group chatbot transmission protocol.

feishu: Lark group chatbot transmission protocol.

welink: WeLink group chatbot transmission protocol.

dingTalkBot: DingTalk transmission protocol.

endpoint

Yes

String

Note:

If you use the HTTP protocol, start the endpoint with http://.

If you use the HTTPS protocol, start the endpoint with https://.

If you use the email protocol, enter an email address.

If you use the SMS protocol, enter a phone number.

If you use the FunctionGraph(function) protocol, enter a function.

If you use the FunctionGraph (workflow) protocol, enter a workflow.

If you use the voice notification protocol, enter a phone number.

If you use the DingTalk chatbot protocol, enter the webhook URL of a custom DingTalk group chatbot or openConversationId of a group to which an enterprise DingTalk chatbot is added. When you add openConversationId, do not start the endpoint with http:// or https://.

If you use the wechat protocol, enter the webhook URL of a WeCom group chatbot.

If you use thefeishu protocol, enter the webhook URL of a Lark group chatbot.

If you use the welink protocol, enter a WeLink group number.

If you use the dingTalkBot protocol, enter the user ID of a DingTalk enterprise user.

remark

No

String

Specifies the remarks. The remarks must be UTF-8-coded and can contain up to 128 bytes.

extension

No

SubscriptionExtension object

Specifies the extension information.

subscriptions

No

Array of BatchAddSubscriptionsRequestBody objects

This parameter is mandatory when subscriptions need to be created in batches. SMN allows you to create a maximum of 50 subscriptions at a time.

Table 4 BatchAddSubscriptionsRequestBody

Parameter

Mandatory

Type

Description

protocol

Yes

String

Subscription protocol. (Different protocols indicate different types of endpoints to receive messages.)

The following protocols are supported:

email: The endpoints are email addresses.

sms: SMS transmission protocol. The endpoints are phone numbers.

functionstage: FunctionGraph(function) transmission protocol. The endpoints are functions.

functiongraph: FunctionGraph(workflow) transmission protocol. The endpoints are FunctionGraph workflows orchestrated by the FunctionGraph function.

http and https: The endpoints are URLs.

callnotify: Voice notification protocol. The endpoints are phone numbers.

wechat: WeCom group chatbot transmission protocol.

dingding: DingTalk group chatbot transmission protocol.

feishu: Lark group chatbot transmission protocol.

welink: WeLink group chatbot transmission protocol.

endpoint

Yes

String

Note:

If you use the HTTP protocol, start the endpoint with http://.

If you use the HTTPS protocol, start the endpoint with https://.

If you use the email protocol, enter an email address.

If you use the SMS protocol, enter a phone number.

If you use the FunctionGraph (function) protocol, enter a function.

If you use the FunctionGraph (workflow) protocol, enter a workflow.

If you use the voice notification protocol, enter a phone number.

If you use the DingTalk chatbot protocol, enter the webhook URL of a custom DingTalk group chatbot or openConversationId of a group to which an enterprise DingTalk chatbot is added. When you add openConversationId, do not start the endpoint with http:// or https://.

If you use the wechat protocol, enter the webhook URL of a WeCom group chatbot.

If you use thefeishu protocol, enter the webhook URL of a Lark group chatbot.

If you use the welink protocol, enter a WeLink group number.

remark

No

String

Remarks. The remarks must be UTF-8-coded and can contain up to 128 bytes.

extension

No

SubscriptionExtension object

Extended subscription information.

Table 5 SubscriptionExtension

Parameter

Mandatory

Type

Description

client_id

No

String

Specifies the application ID. This field is mandatory when you set protocol to welink. Obtain the value from WeLink.

client_secret

No

String

Specifies the application secret. This field is mandatory when you set protocol to welink. Obtain the value from WeLink.

keyword

No

String

Specifies the keyword. When you set protocol to feishu, you must set either keyword or sign_secret. When you add a keyword for security verification on the Lark chatbot or a custom DingTalk chatbot, keyword must be one of the keywords you entered for the Lark chatbot or the custom DingTalk chatbot.

sign_secret

No

String

Specifies the key. When you set protocol to feishu, you must set either this parameter or keyword. The value of this parameter must be the same as that you customized for the Lark chatbot or the custom DingTalk chatbot. For example, if you set only key for the Lark chatbot, enter the value of key. If you set only keyword for the Lark chatbot, skip this field.

header

No

Map<String,String>

This is an HTTP header field, which can be customized within the field range. The field content exists in the form of key/value pairs. When a topic is used to send messages, confirmed subscription messages carry the user-defined HTTP header.

Header for subscriptions over HTTP or HTTPS. The header must meet the following requirements:

key can contain letters, digits, and hyphens (-). key cannot end with a hyphen (-) nor contain consecutive hyphens (-).

You can specify up to 10 key/value pairs.

key must start with **x-**but not x-smn. Examples: x-abc-cba or x-abc

The total length of all key/value pairs cannot exceed 1,024 characters.

key is case insensitive.

key must be unique.

value must be an ASCII code. Unicode characters are not supported. Spaces are allowed.

app_key

No

String

The appKey field of DingTalk can contain a maximum of 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. This parameter is mandatory when the protocol is set to dingTalkBot.

app_secret

No

String

The appSecret field of DingTalk can contain a maximum of 128 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. This parameter is mandatory when the protocol is set to dingTalkBot.

robot_code

No

String

The robotCode field of DingTalk can contain a maximum of 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. Generally, the value is the same as that of appKey. This parameter is mandatory when the protocol is set to dingTalkBot.

Response Parameters

Status code: 201

Table 6 Response body parameters

Parameter

Type

Description

request_id

String

Specifies the request ID, which is unique.

subscription_urn

String

Specifies the resource identifier of a subscription, which is unique.

Status code: 400

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: 403

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: 404

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.

Status code: 500

Table 10 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

Adding a subscription to the topic named test_topic_v1

POST https://{SMN_Endpoint}/v2/{project_id}/notifications/topics/urn:smn:regionId:762bdb3251034f268af0e395c53ea09b:test_topic_v1/subscriptions

{
  "protocol" : "email",
  "endpoint" : "xxx@example.com",
  "remark" : "O&M"
}

Example Responses

Status code: 201

OK

[ {
  "request_id" : "6a63a18b8bab40ffb71ebd9cb80d0085",
  "subscription_urn" : "urn:smn:regionId:762bdb3251034f268af0e395c53ea09b:test_topic_v1:2e778e84408e44058e6cbc6d3c377837"
} ]

SDK Sample Code

The SDK sample code is as follows.

Adding a subscription to the topic named test_topic_v1

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.smn.v2.region.SmnRegion;
import com.huaweicloud.sdk.smn.v2.*;
import com.huaweicloud.sdk.smn.v2.model.*;


public class AddSubscriptionSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        SmnClient client = SmnClient.newBuilder()
                .withCredential(auth)
                .withRegion(SmnRegion.valueOf("<YOUR REGION>"))
                .build();
        AddSubscriptionRequest request = new AddSubscriptionRequest();
        request.withTopicUrn("{topic_urn}");
        AddSubscriptionRequestBody body = new AddSubscriptionRequestBody();
        body.withRemark("O&M");
        body.withEndpoint("xxx@example.com");
        body.withProtocol("email");
        request.withBody(body);
        try {
            AddSubscriptionResponse response = client.addSubscription(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Adding a subscription to the topic named test_topic_v1

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdksmn.v2.region.smn_region import SmnRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdksmn.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = SmnClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(SmnRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = AddSubscriptionRequest()
        request.topic_urn = "{topic_urn}"
        request.body = AddSubscriptionRequestBody(
            remark="O&M",
            endpoint="xxx@example.com",
            protocol="email"
        )
        response = client.add_subscription(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Adding a subscription to the topic named test_topic_v1

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    smn "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := smn.NewSmnClient(
        smn.SmnClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.AddSubscriptionRequest{}
	request.TopicUrn = "{topic_urn}"
	remarkAddSubscriptionRequestBody:= "O&M"
	request.Body = &model.AddSubscriptionRequestBody{
		Remark: &remarkAddSubscriptionRequestBody,
		Endpoint: "xxx@example.com",
		Protocol: "email",
	}
	response, err := client.AddSubscription(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Adding a subscription to the topic named test_topic_v1

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.smn.v2.region.SmnRegion;
import com.huaweicloud.sdk.smn.v2.*;
import com.huaweicloud.sdk.smn.v2.model.*;


public class AddSubscriptionSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        SmnClient client = SmnClient.newBuilder()
                .withCredential(auth)
                .withRegion(SmnRegion.valueOf("<YOUR REGION>"))
                .build();
        AddSubscriptionRequest request = new AddSubscriptionRequest();
        request.withTopicUrn("{topic_urn}");
        AddSubscriptionRequestBody body = new AddSubscriptionRequestBody();
        body.withRemark("O&M");
        body.withEndpoint("xxx@example.com");
        body.withProtocol("email");
        request.withBody(body);
        try {
            AddSubscriptionResponse response = client.addSubscription(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Adding a subscription to the topic named test_topic_v1

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdksmn.v2.region.smn_region import SmnRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdksmn.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = SmnClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(SmnRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = AddSubscriptionRequest()
        request.topic_urn = "{topic_urn}"
        request.body = AddSubscriptionRequestBody(
            remark="O&M",
            endpoint="xxx@example.com",
            protocol="email"
        )
        response = client.add_subscription(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Adding a subscription to the topic named test_topic_v1

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    smn "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/smn/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := smn.NewSmnClient(
        smn.SmnClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.AddSubscriptionRequest{}
	request.TopicUrn = "{topic_urn}"
	remarkAddSubscriptionRequestBody:= "O&M"
	request.Body = &model.AddSubscriptionRequestBody{
		Remark: &remarkAddSubscriptionRequestBody,
		Endpoint: "xxx@example.com",
		Protocol: "email",
	}
	response, err := client.AddSubscription(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

201

OK

400

Bad Request

403

Unauthorized

404

Not Found

500

Internal Server Error

Error Codes

See Error Codes.

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