Spotify backend using AWS Lambda, Dynamo DB & CloudFormation

GET https://xxxx.amazonaws.com/song

{
  "artist": "Gojira",
  "track": "The Gift of Guilt"
}

The project source includes function code and supporting resources:

• src/main - A Java function.
• src/test - A unit test and helper classes.
• template.yml - An AWS CloudFormation template that creates an application.
• build.gradle - A Gradle build file.
• 1-create-bucket.sh, 2-deploy.sh, etc. - Shell scripts that use the AWS CLI to deploy and manage the application.

Use the following instructions to deploy the sample application.

Setup

Download or clone this repository. Make sure aws if configured to be used through command line. To create a new bucket for deployment artifacts, run 1-create-bucket.sh.

$ ./1-create-bucket.sh
 lambda-artifacts-a5e4xmplb5b22e0d

Deploy

To deploy the application, run 2-deploy.sh.

$ ./2-deploy.sh
BUILD SUCCESSFUL in 1s
Successfully packaged artifacts and wrote output template to file out.yml.
Waiting for changeset to be created..
Successfully created/updated stack - spotify_backend

This script uses AWS CloudFormation to deploy the Lambda functions and an IAM role. If the AWS CloudFormation stack that contains the resources already exists, the script updates it with any changes to the template or function code.

Set up AWS Lambda API Gateway

• Setup AWS CLI & aws configure.
• Connect API gateway to your lambda function. Create two 2 endpoints: /code and /song
• Create Spotify Application via dashboard. Get Client id and Secret.
• Execute GET https://xxxx.amazonaws.com/song?client_id={YOUR_CLIENT_ID}&secret={YOUR_SECRET} This will lead you through the OAUTH2 process.

{
  "error": "https://accounts.spotify.com/authorize?client_id={YOUR_CLIENT_ID}&response_type=code&scope=user-read-playback-state%20user-modify-playback-state&redirect_uri=https://xxxx.amazonaws.com/code"
}

• Follow the URL to authorize the lambda with requested OAuth2 scopes.

Test

GET https://xxxx.amazonaws.com/song

{
  "artist": "Gojira",
  "track": "The Gift of Guilt"
}

GET https://xxxx.amazonaws.com/song?switch=next or switch=previous will switch songs.

Cleanup

To delete the application, run 4-cleanup.sh.

$ ./4-cleanup.sh