Get the ten best sellers books on Amazon using aws serverless environment
This project works with a NodeJS lambda function running on AWS using the traditional Serverless Framework. Once deployed, you got access by GET event to a function that returns an array with the top ten best-sellers books of Amazon on that day. Another function deployed makes the scraping info once a day, triggered in a cron-like manner. The scraper function saves the information on DynamoDB, thus making the information available for the first lambda. For details about configuration of serverless, please refer to our documentation.
In order to deploy, you need to run the following command:
Test:
$ serverless deploy --stage qa
Production:
$ serverless deploy --stage prod
After running deploy, you should see output similar to:
Serverless: Packaging service...
Serverless: Excluding development dependencies...
Serverless: Installing dependencies for custom CloudFormation resources...
Serverless: Creating Stack...
Serverless: Checking Stack create progress...
........
Serverless: Stack create finished...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
Serverless: Uploading service BestSellers.zip file to S3 (53.14 MB)...
Serverless: Uploading custom CloudFormation resources...
Serverless: Validating template...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
...........................................................................
Serverless: Stack update finished...
Service Information
service: BestSellers
stage: prod
region: us-east-1
stack: BestSellers-prod
resources: 26
api keys:
None
endpoints:
GET - https://99999999.execute-api.us-east-1.amazonaws.com/prod/todaylist
functions:
scraping: BestSellers-prod-scraping
getTodayList: BestSellers-prod-getTodayList
layers:
None
Serverless: Publishing service to the Serverless Dashboard...
Serverless: Successfully published your service to the Serverless Dashboard: https://app.serverless.com/xxxxx/apps/bestsellers/BestSellers/prod/us-east-1After successful deployment, you can invoke the scraping function by using the following command:
serverless invoke --function scrapingWhich should result in response similar to the following:
{
"statusCode": 200,
"body": "Itens created with success!"
}You can invoke your function locally by using the following command:
serverless invoke local --function getTodayListWhich should result in response similar to the following:
{
"statusCode": 200,
"body": "[
{\"rating\":\"4.8 out of 5 stars\",\"ranking\":\"#7\",\"createdAt\":\"Mon Nov 08 2021\",\"writer\":\"Adam Wallace\",\"price\":\"$7.58\",\"title\":\"How to Catch a Turkey\"},
...
]"
}
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