Question 18439 in Amazon Web Sevices Question posted in
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How to trigger AWS State machine when a website is updated – Amazon Web Sevices

https://www.jnto.go.jp/jpn/statistics/since2003_visitor_arrivals.xlsx

I have the above public website. The website or file is updated once a month by the admin of that website. Can you please tell me how to trigger State machine when that above website is updated?

I have looked at API Gateway but it only assign State machine an endpoint to trigger and not triggering the state machine from an endpoint.

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Answers


  1. 0

    You can use AWS Eventbridge to trigger your AWS step function. Create a rule eg. If the last logged in date is changed then an event is triggered which in turn triggers the state function.

    More methods can be found here

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  2. 0

    Because the website is outside your AWS environment, you must periodically poll its information to check if the file was updated.

    There’s no out-of-the-box solution in AWS. One way to achieve it:

    • EventBridge Scheduler: Trigger a lambda every week (eg. Friday)
    • DynamoDB Table: To track the "Last-Modified" value
    • Lambda: Fetch the URL and check the "Last-Modified" header. Compare it with the value in DynamoDB, it if is different, update DynamoDB and trigger the Step Functions workflow via AWS SDK

    References:

    Updates 2023-03-15

    I shared a demo-ish code using CDK on:

    enter image description here

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