Testing API using Postman

Objective

Test the API Gateway REST endpoint integrated with the Lambda Function to verify the data operations performed on DynamoDB.

1. Update Authorization Settings

• Go to AWS Console → API Gateway
• Select FlyoraAPI
• Navigate to
  /api/v1/{myProxy+} → ANY → Method request → Edit

• Set Authorization to AWS_IAM(Note: Only enable when testing with Postman, then remember to turn it off afterwards)

2. Create an Access Key

• Go to AWS Console → IAM → Users
• Click Create User

• Set username: test

• Confirm user creation

• Open the test user → Security credentials → Create access key

• Choose Local code

• Copy the Access key and Secret access key

Testing GET Request

• Open Postman

• Choose GET

• Enter URL:https://<api_id>.execute-api.ap-southeast-1.amazonaws.com/dev/api/v1/reviews/product/1

• Headers tab:

  • Key: Content-Type | Value: application/json

• Authorization tab:

  • Type: AWS Signature
  • Enter AccessKey
  • Enter SecretKey
  • AWS Region: ap-southeast-1
  • Service Name: execute-api

• Click Send

• Result: Returns the list of Items from the reviews table.

Testing POST Request

• Choose POST

• URL:https://<api_id>.execute-api.ap-southeast-1.amazonaws.com/dev/api/v1/reviews/submit

• Body → raw → JSON

  {
    "customerId": 2,
    "rating": 4,
    "comment": "Chim ăn ngon và vui vẻ!",
    "customerName": "Nguyễn Văn B"
  }
  

• Click Send

• Result: Inserts a new Item into the Review table.