SnsSubscribe.go

// snippet-comment:[These are tags for the AWS doc team's sample catalog. Do not remove.]
// snippet-sourceauthor:[Doug-AWS]
// snippet-sourcedescription:[SnsSubscribe.go -e EMAIL -t TOPIC-ARN subscribes the user with email address EMAIL to the SNS topic with the ARN TOPIC-ARN.]
// snippet-keyword:[Amazon Simple Notification Service]
// snippet-keyword:[Amazon SNS]
// snippet-keyword:[Subscribe function]
// snippet-keyword:[Go]
// snippet-sourcesyntax:[go]
// snippet-service:[sns]
// snippet-keyword:[Code Sample]
// snippet-sourcetype:[full-example]
// snippet-sourcedate:[2020-1-6]
/*
   Copyright 2010-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.

   This file is licensed under the Apache License, Version 2.0 (the "License").
   You may not use this file except in compliance with the License. A copy of
   the License is located at

    http://aws.amazon.com/apache2.0/

   This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied. See the License for the
   specific language governing permissions and limitations under the License.
*/
// snippet-start:[sns.go.subscribe]
package main

import (
    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/aws/aws-sdk-go/service/sns"

    "flag"
    "fmt"
    "os"
)

func main() {
    emailPtr := flag.String("e", "", "The email address of the user subscribing to the topic")
    topicPtr := flag.String("t", "", "The ARN of the topic to which the user subscribes")

    flag.Parse()

    if *emailPtr == "" || *topicPtr == "" {
        fmt.Println("You must supply an email address and topic ARN")
        fmt.Println("Usage: go run SnsSubscribe.go -e EMAIL -t TOPIC-ARN")
        os.Exit(1)
    }

    // Initialize a session that the SDK will use to load
    // credentials from the shared credentials file. (~/.aws/credentials).
    sess := session.Must(session.NewSessionWithOptions(session.Options{
        SharedConfigState: session.SharedConfigEnable,
    }))

    svc := sns.New(sess)

    result, err := svc.Subscribe(&sns.SubscribeInput{
        Endpoint:              emailPtr,
        Protocol:              aws.String("email"),
        ReturnSubscriptionArn: aws.Bool(true), // Return the ARN, even if user has yet to confirm
        TopicArn:              topicPtr,
    })
    if err != nil {
        fmt.Println(err.Error())
        os.Exit(1)
    }

    fmt.Println(*result.SubscriptionArn)
}
// snippet-end:[sns.go.subscribe]