Welcome to my article on how to send targeted AWS SNS messages to specific subscribers using Python and boto3. In this guide, I will walk you through the process of setting up and sending targeted notifications to your subscribers, allowing you to reach the right people with the right message.

By the end of this article, you will have a solid understanding of how to use Python and boto3 to send targeted notifications, and you will be able to apply this knowledge to your own projects. So, let's get started!

SNS (Simple Notification Service) is a powerful AWS service that allows you to send notifications to a wide range of recipients, including mobile devices, email addresses, and SQS queues. One of the key features of SNS is the ability to send targeted notifications to specific subscribers by using filter policies.

{
  "email": [
    "some_user@gmail.com"
  ]
}

A filter policy is a JSON object that specifies the criteria for which messages should be delivered to a particular endpoint. For example, the filter policy shown above will only deliver messages to the email address "some_user@gmail.com". This is a great way to send targeted notifications to specific users without sending unnecessary messages to others.

To use a filter policy, you will first need to create a new SNS topic and subscribe an endpoint (e.g. email address) to it. Once the endpoint is subscribed, you can then set a filter policy for that endpoint by calling the "set_subscription_attributes" method of the boto3 SNS client, passing in the filter policy as a parameter.

AWS SNS Topic Deployment with Python

Here is an example of how you can deploy an SNS topic and subscribers with filter policy in Python with boto3:

import boto3

# Create an SNS client
sns = boto3.client('sns')

# Create a new SNS topic
topic_arn = sns.create_topic(Name='my_topic')['TopicArn']

# List of subscriber emails
emails = ['some_user@gmail.com', 'another_user@gmail.com']

# Subscribe endpoints (email addresses) to the topic
for email in emails:
    sns.subscribe(TopicArn=topic_arn, Protocol='email', Endpoint=email)

# Set a filter policy for the endpoints
for email in emails:
    filter_policy = {
        "email": [email]
    }
    subscription_arn = sns.list_subscriptions_by_topic(
      TopicArn=topic_arn)['Subscriptions'][0]['SubscriptionArn']
    sns.set_subscription_attributes(SubscriptionArn=subscription_arn, AttributeName='FilterPolicy', AttributeValue=filter_policy)

In this example, we have a list of subscriber emails, 'some_user@gmail.com', 'another_user@gmail.com'. We are using a for loop to iterate through this list and create subscribers by calling the subscribe method and passing the email address as the endpoint.

Then we are using another for loop to assign filter policy to each subscriber by calling set_subscription_attributes method and passing the filter policy which is only the current email address in the list.

Send SNS message to targeted Email subscriber

Here is an example of how you can use Python and boto3 to send a targeted message to a specific SNS subscriber email:

import boto3

sns = boto3.client('sns')

sns_arn = "arn:aws:sns:us-east-1:123456789:some_sns_topic_name"
email = "some_user@gmail.com"
message = f"This is a targeted message to {email}"

response = sns.publish(
        TopicArn=sns_arn,
        Message=message,
        MessageAttributes={'email': {'DataType': 'String', 'StringValue': email}})

That was Eezy Peezy!

I hope this article has helped you understand how to send targeted SNS notifications to specific subscribers using Python and boto3. Whether you're looking to send targeted messages to specific users or set up filter policies to deliver the right message to the right person, using Python and boto3 is a powerful and flexible way to work with SNS.

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I hope you enjoy using Python and boto3 to send targeted SNS notifications and I look forward to hearing from you. Thank you for reading!