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‎sns-slack-teams-integration-cdk-python/README.md‎

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# AWS SNS integration with slack/teams channels
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This pattern demonstrates how you can setup a fully serverless setup to integrate your SNS topic with Slack/Teams channel. This provisions AWS resources for you and you just need to integrate your Slack/Teams webhooks to get it running.
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[Learn more about this pattern at Serverless Land Patterns](https://serverlessland.com/repos/sns-slack-teams-integration-cdk-python)
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[SNS & Slack/Teams integration diagram](https://github.com/ajayv-AWS/Img/blob/870961eb05a4732ea2ee6a36af8ad1fd6a7ef206/SNS-teams-slack.drawio.png?raw=true)
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Important: this application uses various AWS services and there are costs associated with these services after the Free Tier usage - please see the [AWS Pricing page](https://aws.amazon.com/pricing/) for details. You are responsible for any AWS costs incurred. No warranty is implied in this example.
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## Requirements
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* [Create an AWS account](https://portal.aws.amazon.com/gp/aws/developer/registration/index.html) if you do not already have one and log in. The IAM user that you use must have sufficient permissions to make necessary AWS service calls and manage AWS resources.
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* [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html) installed and configured
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* [Git Installed](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
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* [AWS CDK](https://docs.aws.amazon.com/cdk/latest/guide/cli.html) installed and configured
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## Deployment Instructions
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1. Create a new directory, navigate to that directory in a terminal and clone the GitHub repository:
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```bash
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git clone https://github.com/aws-samples/serverless-patterns
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```
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2. Change directory to the pattern directory:
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```bash
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cd serverless-patterns/sns-slack-teams-integration-cdk-python
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```
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3. To manually create a virtualenv on MacOS and Linux:
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```bash
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python3 -m venv .venv
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```
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4. After the init process completes and the virtualenv is created, you can use the following
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step to activate your virtualenv.
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```bash
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source .venv/bin/activate
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```
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5. If you are a Windows platform, you would activate the virtualenv like this:
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```bash
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.venv\Scripts\activate.bat
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```
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6. Once the virtualenv is activated, you can install the required dependencies.
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```bash
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pip install -r requirements.txt
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```
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7. To deploy the application:
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```bash
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cdk deploy
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```
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## How it works
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This template will create an SNS topic which you can use to publish notifications to your Slack/Teams channel, and a Lambda function which will process the SNS message and pass it to the Slack/Teams webhook. You can customise the code to apply additional formatting as per your usecase.
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## Testing
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Publish a message from AWS Console or by CLI.
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Example using CLI:
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aws sns publish --topic-arn ENTER_YOUR_SNS_TOPIC_ARN --subject testSubject --message testMessage
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## Cleanup
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* Delete the stack
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```bash
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cdk destroy
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```
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----
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Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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SPDX-License-Identifier: MIT-0

‎sns-slack-teams-integration-cdk-python/app.py‎

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#!/usr/bin/env python3
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import os
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import aws_cdk as cdk
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from sns_slack_teams_integration_cdk_python.sns_slack_teams_integration_cdk_python_stack import SnsSlackTeamsIntegrationCdkPythonStack
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app = cdk.App()
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SnsSlackTeamsIntegrationCdkPythonStack(app, "SnsSlackTeamsIntegrationCdkPythonStack",
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# If you don't specify 'env', this stack will be environment-agnostic.
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# Account/Region-dependent features and context lookups will not work,
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# but a single synthesized template can be deployed anywhere.
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# Uncomment the next line to specialize this stack for the AWS Account
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# and Region that are implied by the current CLI configuration.
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#env=cdk.Environment(account=os.getenv('CDK_DEFAULT_ACCOUNT'), region=os.getenv('CDK_DEFAULT_REGION')),
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# Uncomment the next line if you know exactly what Account and Region you
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# want to deploy the stack to. */
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#env=cdk.Environment(account='123456789012', region='us-east-1'),
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# For more information, see https://docs.aws.amazon.com/cdk/latest/guide/environments.html
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)
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app.synth()

‎sns-slack-teams-integration-cdk-python/cdk.json‎

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{
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"app": "python3 app.py",
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"watch": {
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"include": [
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"**"
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],
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"exclude": [
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"README.md",
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"cdk*.json",
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"requirements*.txt",
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"source.bat",
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"**/__init__.py",
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"python/__pycache__",
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"tests"
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]
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},
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"context": {
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"@aws-cdk/aws-lambda:recognizeLayerVersion": true,
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"@aws-cdk/core:checkSecretUsage": true,
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"@aws-cdk/core:target-partitions": [
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"aws",
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"aws-cn"
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],
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"@aws-cdk-containers/ecs-service-extensions:enableDefaultLogDriver": true,
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"@aws-cdk/aws-ec2:uniqueImdsv2TemplateName": true,
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"@aws-cdk/aws-ecs:arnFormatIncludesClusterName": true,
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"@aws-cdk/aws-iam:minimizePolicies": true,
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"@aws-cdk/core:validateSnapshotRemovalPolicy": true,
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"@aws-cdk/aws-codepipeline:crossAccountKeyAliasStackSafeResourceName": true,
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"@aws-cdk/aws-s3:createDefaultLoggingPolicy": true,
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"@aws-cdk/aws-sns-subscriptions:restrictSqsDescryption": true,
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"@aws-cdk/aws-apigateway:disableCloudWatchRole": true,
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"@aws-cdk/core:enablePartitionLiterals": true,
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"@aws-cdk/aws-events:eventsTargetQueueSameAccount": true,
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"@aws-cdk/aws-iam:standardizedServicePrincipals": true,
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"@aws-cdk/aws-ecs:disableExplicitDeploymentControllerForCircuitBreaker": true,
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"@aws-cdk/aws-iam:importedRoleStackSafeDefaultPolicyName": true,
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"@aws-cdk/aws-s3:serverAccessLogsUseBucketPolicy": true,
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"@aws-cdk/aws-route53-patters:useCertificate": true,
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"@aws-cdk/customresources:installLatestAwsSdkDefault": false,
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"@aws-cdk/aws-rds:databaseProxyUniqueResourceName": true,
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"@aws-cdk/aws-codedeploy:removeAlarmsFromDeploymentGroup": true,
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"@aws-cdk/aws-apigateway:authorizerChangeDeploymentLogicalId": true,
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"@aws-cdk/aws-ec2:launchTemplateDefaultUserData": true,
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"@aws-cdk/aws-secretsmanager:useAttachedSecretResourcePolicyForSecretTargetAttachments": true,
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"@aws-cdk/aws-redshift:columnId": true,
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"@aws-cdk/aws-stepfunctions-tasks:enableEmrServicePolicyV2": true,
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"@aws-cdk/aws-ec2:restrictDefaultSecurityGroup": true,
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"@aws-cdk/aws-apigateway:requestValidatorUniqueId": true,
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"@aws-cdk/aws-kms:aliasNameRef": true,
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"@aws-cdk/aws-autoscaling:generateLaunchTemplateInsteadOfLaunchConfig": true,
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"@aws-cdk/core:includePrefixInUniqueNameGeneration": true,
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"@aws-cdk/aws-efs:denyAnonymousAccess": true,
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"@aws-cdk/aws-opensearchservice:enableOpensearchMultiAzWithStandby": true,
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"@aws-cdk/aws-lambda-nodejs:useLatestRuntimeVersion": true,
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"@aws-cdk/aws-efs:mountTargetOrderInsensitiveLogicalId": true
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}
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}
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‎sns-slack-teams-integration-cdk-python/example-pattern.json‎

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{
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"title": "Amazon SNS integration with Slack/Teams channels",
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"description": "This sample project demonstrates the publishing of messages from an SNS topic to an AWS Lambda function, which in turn triggers notifications to a Slack/Teams channel.",
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"language": "Python",
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"level": "200",
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"framework": "CDK",
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"introBox": {
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"headline": "How it works",
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"text": [
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"This sample pattern demonstrates how to use AWS SNS and Lambda function to deliver notifications to your slack or teams channels.",
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"This pattern uses AWS CDK to setup the AWS serverless services and provides you with a setup ready to be integrated with your Slack/Teams channel",
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"This pattern deploys one SNS topic and one Lambda function"
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]
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},
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"gitHub": {
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"template": {
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"repoURL": "https://github.com/aws-samples/serverless-patterns/tree/main/sns-slack-teams-integration-cdk-python",
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"templateURL": "serverless-patterns/sns-slack-teams-integration-cdk-python",
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"projectFolder": "sns-slack-teams-integration-cdk-python",
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"templateFile": "sns_slack_teams_integration_cdk_python/sns_slack_teams_integration_cdk_python_stack.py"
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}
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},
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"resources": {
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"bullets": [
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{
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"text": "Getting started with the AWS CDK",
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"link": "https://docs.aws.amazon.com/cdk/v2/guide/getting_started.html"
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},
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{
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"text": "Setup SNS topic",
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"link": "https://docs.aws.amazon.com/sns/latest/dg/sns-create-topic.html"
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},
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{
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"text": "Create Lambda function",
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"link": "https://docs.aws.amazon.com/lambda/latest/dg/getting-started.html"
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},{
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"text": "Add lambda function as subscriber to a SNS topic",
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"link": "https://docs.aws.amazon.com/sns/latest/dg/lambda-console.html"
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},
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{
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"text": "Add your slack/MS teams and channel configuration to the Lambda function",
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"link": "https://repost.aws/knowledge-center/sns-lambda-webhooks-chime-slack-teams"
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}
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]
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},
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"deploy": {
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"text": [
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"cdk deploy"
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]
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},
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"testing": {
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"text": [
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"See the GitHub repo for detailed testing instructions."
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]
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},
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"cleanup": {
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"text": [
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"cdk destroy"
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]
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},
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"authors": [
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{
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"name": "Rick Xie",
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"image": "https://drive.google.com/file/d/1GEM7I1PK3i0HT3pMMoI7d5zFXw4wAEFL/view?usp=sharing",
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"bio": "Cloud Support Engineer @ AWS",
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"linkedin": "https://www.linkedin.com/in/rick-xie"
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}
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]
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}

‎sns-slack-teams-integration-cdk-python/lambda/lambda_function.py‎

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import urllib3
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import json
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http = urllib3.PoolManager()
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def lambda_handler(event, context):
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#when using slack
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url = 'https://hooks.slack.com/services/xxxxxxx'
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msg = {
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'channel': '#CHANNEL_NAME',
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'text': event['Records'][0]['Sns']['Message'],
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'icon_emoji': '',
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}
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#when using teams
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#url = "https://outlook.office.com/webhook/xxxxxxx"
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#msg = {"text": event["Records"][0]["Sns"]["Message"]}
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encoded_msg = json.dumps(msg).encode('utf-8')
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resp = http.request('POST', url, body=encoded_msg)
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print({
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"message": event["Records"][0]["Sns"]["Message"],
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"status_code": resp.status,
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"response": resp.data,
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})

‎sns-slack-teams-integration-cdk-python/requirements.txt‎

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aws-cdk-lib==2.93.0
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constructs>=10.0.0,<11.0.0

‎sns-slack-teams-integration-cdk-python/sns_slack_teams_integration_cdk_python/__init__.py‎

Whitespace-only changes.

‎sns-slack-teams-integration-cdk-python/sns_slack_teams_integration_cdk_python/sns_slack_teams_integration_cdk_python_stack.py‎

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from aws_cdk import (
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Duration,
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Stack,
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CfnOutput,
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aws_sns as sns,
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aws_sns_subscriptions as subscriptions,
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aws_lambda as _lambda
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)
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from constructs import Construct
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class SnsSlackTeamsIntegrationCdkPythonStack(Stack):
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def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
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super().__init__(scope, construct_id, **kwargs)
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# Lambda function
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lambdaFn = _lambda.Function(self, "SlackTeamsIntegrationLambda",
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runtime=_lambda.Runtime.PYTHON_3_8,
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code=_lambda.Code.from_asset('lambda'),
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handler="lambda_function.lambda_handler",
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timeout=Duration.seconds(10))
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# SNS topic
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topic = sns.Topic(self, "SlackTeamsIntegrationTopic",
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display_name="SlackTeamsIntegrationTopic")
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# Subscribe Lambda to SNS topic
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topic.add_subscription(subscriptions.LambdaSubscription(lambdaFn))
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# Output information about the created resources
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CfnOutput(self, 'snsTopicArn',
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value=topic.topic_arn,
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description='The ARN of the SNS topic')
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CfnOutput(self, 'functionName', value=lambdaFn.function_name, description="The name of the Lambda function")

‎sns-slack-teams-integration-cdk-python/source.bat‎

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@echo off
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rem The sole purpose of this script is to make the command
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rem
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rem source .venv/bin/activate
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rem
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rem (which activates a Python virtualenv on Linux or Mac OS X) work on Windows.
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rem On Windows, this command just runs this batch file (the argument is ignored).
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rem
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rem Now we don't need to document a Windows command for activating a virtualenv.
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echo Executing .venv\Scripts\activate.bat for you
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.venv\Scripts\activate.bat

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