Question 19885 in Amazon Web Sevices Question posted in
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How to override cloudfront response for a specific path pattern and specific status code?

I’m getting 404 errors on a specific path pattern say xyz/index.html, how to return custom HTML content instead of a 404 Not Found error?

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  1. Chosen as BEST ANSWER
    0

    You can achieve this using CLoudfront Edge Functions:

    • Create lambda function in us-east-1 region (irrespective of your local region).
    • Update the function role Trusted Relationships to allow access for cloudfront. 
      {
  "Version": "2012-10-17",
  "Statement": [
      {
          "Effect": "Allow",
          "Principal": {
              "Service": [
                  "edgelambda.amazonaws.com",
                  "lambda.amazonaws.com"
              ]
          },
          "Action": "sts:AssumeRole"
      }
  ]
}
    • Update the function code to handle the origin response.
      def lambda_handler(event, context):
    response = event['Records'][0]['cf']['response']

    is_404_page = int(response['status']) == 404
    
    is_html_page =  "index.html" in event['Records'][0]['cf']['request']["uri"]

    if is_404_page and is_html_page:
        response['status'] = 200
        response['statusDescription'] = 'OK'
        response['body'] = """
<!DOCTYPE html>
<html>
  <head>
    <title>Custom Response</title>
  </head>
  <body>
    <p>Custom response page.</p>
  </body>
</html>
    """

    return response
    • Deploy Function.
    • Click on Actions -> Choose Deploy to Lambda@Edge under Capabilities
    • Configure the CloudFront trigger, and deploy it.
    • It takes around 5 minutes to update CloudFront distribution, then you can test your changes.

  2. 0

    Go to your Cloudfront Distribiution you want to create a custom error page.

    • Then in the CloudFront Management Console choose Error Responses

    enter image description here

    • Click on the Create Custom Error Response button to get started, then create the error response.

    enter image description here

    • You can also choose the HTTP status code that will be returned along with the response page.

    There’s a blog post on how to do it step by step here.

    Full documentation on generating custom error responses for Cloudfront is here.

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