- Create your account at auth0.com
- Creating Dyanmo DB Table
- Go to AWS Management Console
- Browse DynamoDB Dashboard
- Click Create Table
- Put table name as Users
- Put partiton key as id
- Click on Create Button at the bottom
- Creating Lambda Function, with the help of which we will add data into the table
- Go to AWS Management Console
- Browse Lambda Dashboard
- Create Function
- Define a function name
- Keep Runtime as Node.js.14.x
- Click on Change default execution role
- Use Create a new role from AWS policy templates
- Define a role name
- Under policy templates select "Simple microservice permissions" (or else create your new role with necessary permissions to deal with DynamoDB)
- Click on Create Function
- Under the code, paste the code provided in sample.js
- Click on Deploy button to save and deploy the code
- Creating Auth0 authorizer now
- Go to Auth0 dashboard
- Go to Applications -> APIs -> Create API
- Define a name
- Put identifier as "https://auth0-jwt-authorizer"
- Click on Create button
- Click on Test button
- Kindly note down URL in curl sample command
- On the top, there will be identifier address, kindly note that down as well
- Let's create API endpoint for our Lambda Function now
- Go to your Lambda Function page
- Add Trigger
- Under trigger dropdown select API Gateway
- Create New HTTP API
- Under Security, select JWT authorizer
- Under Identity Source, put "$request.header.Authorization"
- Under issuer, put the URL you noted from CURL command, and remove "oauth/token" from the end
- Under Audince, put the address you noted from Identfier
- Click on Add at the bottom
- Configure API Gateway now to create different methods for POST and GET
- Go to API Gateway dashboard
- Click on your recently created API
- In the left pane, click on Routes
- Click on ANY
- Under Route Details, edit it
- Change the method to GET and Save it
- Under route details, kindly note down the path specified after your method Name
- Click on Create, to create a new Route
- Choose method as POST, and paste the path copied and Save it
- Now click on POST method
- Click on Attach Integrations to attach Lambda Function to the method
- Click on dropdown stating Choose an Existing Integraiton, and the select already existing one, which we created for first method and Click on Attach Integration
- In the left pane go to Routes once again
- Click on Attach Authorizations to attach Authorizer to the method
- Click on dropdown stating Select existing Authorizer, and the select already existing one, which we created for first method and Click on Attach Authorizer
- Now we are all done, let's test it out.
- Go to your Lambda Function page, to get the API address
- Click on API Gateway
- Below you will see your API Endpoint
- To test the get method
curl -i YOUR_API_ENDPOINT - You will get unauthorized error
- Let's get the token first to authorize our request
- Go to your Auth0 dashboard, under your API page, click on Test
- Now you will see curl URL to get the Tokens, copy it and execute it, you will get the output as below
{"access_token":"YOUR_ACCESS_TOKEN","expires_in":86400,"token_type":"Bearer"} - Kindly copy your access token, we will put this in our requests
- Let's try it out on GET method now
curl -H "Authorization: Bearer YOUR_ACCCESS_TOKEN" -i YOUR_API_ENDPOINT - As no record is there, you will get an empty response
- Let's add some data using POST method
curl -H "Content-Type: application/json" -H "Authorization: Bearer YOUR_ACCESS_TOKEN" -X POST -d '{"name": "Chetan Talwar", "designation": "FilmMaker", "city": "Jalandhar"}' -i YOUR_API_ENDPOINT - Your response will be like below
HTTP/2 201 date: Sun, 11 Jul 2021 06:55:51 GMT content-type: application/json content-length: 45 apigw-requestid: SOME_ID {"id":"SOME_ID"}- You have successfully added the record, let's use GET method to read this
curl -H "Authorization: Bearer YOUR_ACCCESS_TOKEN" -i YOUR_API_ENDPOINT - Your response will be like below
{"Items":[{"designation":"FilmMaker","city":"Las Vegas","id":"SOME_ID","name":"Chetan Talwar"}],"Count":1,"ScannedCount":1} - That's it, you have successfully integrated Lambda function with API Gateway using Auth0 as auhtorizer.
- Happy Learning