serverless-price-tracker-app

Serverless app for tracking price of amazon.com items. Select items in the React.js UI to register for price tracking in the backend (AWS Lambda + DynamoDB). When the price drops to the requested $ amount, a notification function (AWS Lambda) sends an email via AWS SNS.

Instructions

Clone Repo

git clone https://github.com/jmb12686/serverless-price-tracker-app.git
cd serverless-price-tracker-app/backend/

Install dependencies

npm install

Deploy with serverless framework

serverless deploy --aws-profile <AWS_CREDENTIAL_PROFILE_NAME>

Usage

Obtain the ServiceEndpoint url from the cloudformation stack output. This is the entry point to API Gateway for our app deployment and will be the root base URL for our API.

Get Price

$ROOT_BASE_URL/api/v1/price/$PRODUCT_URL - Get price for item. Example Usage:

https://XXXXXXXX.execute-api.us-east-2.amazonaws.com/dev/api/v1/price/https%3A%2F%2Fwww.walmart.com%2Fip%2FParent-s-Choice-HMO-NonGMO-Sensitivity-Infant-Formula-4-Pack-33-2oz-ea%2F407822086

• $ROOT_BASE_URL - ServiceEndpoint / API Gateway endpoint
• $PRODUCT_URL - URL of product to scrape price from. Must be URL encoded.

Get Product Details

$ROOT_BASE_URL/api/v1/productDetails/$PRODUCT_URL - Get details for item. Example Usage:

https://XXXXXXXX.execute-api.us-east-2.amazonaws.com/dev/api/v1/productDetails/https%3A%2F%2Fwww.walmart.com%2Fip%2FParent-s-Choice-HMO-NonGMO-Sensitivity-Infant-Formula-4-Pack-33-2oz-ea%2F407822086

• $ROOT_BASE_URL - ServiceEndpoint / API Gateway endpoint
• $PRODUCT_URL - URL of product to scrape details from. Must be URL encoded.

Watch item for price drop notifications

$ROOT_BASE_URL/api/v1/watch - Watch item for price drop. Expects url priceThreshold and notificationPhoneNumber as POST JSON input data:

• JSON input example: {"url":"https://www.walmart.com/ip/Parent-s-Choice-HMO-NonGMO-Sensitivity-Infant-Formula-4-Pack-33-2oz-ea/407822086", "priceThreshold":PRICE, "notificationPhoneNumber":"5555555555"}

Full curl usage example:

curl -d '{"url":"https://www.walmart.com/ip/Parent-s-Choice-HMO-NonGMO-Sensitivity-Infant-Formula-4-Pack-33-2oz-ea/407822086", "priceThreshold":74, "notificationPhoneNumber":"5555555555"}' -H "Content-Type: application/json" -X POST https://XXXXXXXX.execute-api.us-east-2.amazonaws.com/dev/api/v1/watch