Some server-side website construct are sometimes forwarded to AWS Lambda

[johnrobertcobbold]

Description

While reviewing the Lambda logs of a server-side website construct, I see that certain requests which are usually correctly forwarded to static assets S3 bucket are sometimes forwarded to AWS Lambda. This obviously results in 404 errors.

For example:

• /pwa/favicon-196.png

 [2024-05-02T04:42:53.958839+00:00] logger.ERROR: Not found. {"exception":"[object] (Slim\\Exception\\HttpNotFoundException(code: 404): Not found. at /var/task/vendor/slim/slim/Slim/Middleware/RoutingMiddleware.php:76)","method":"GET","url":"http://xxx.execute-api.ap-southeast-1.amazonaws.com:443/pwa/favicon-196.png","referrer":"https://xxx.execute-api.ap-southeast-1.amazonaws.com/en/?fbclid=IwZXh0bgNhZW0CMTEAAR0PtKUWFWvg9PHimsA-6y84pOkK1FCcxbf8O8rlYmLo-u4xO0FrUOPvUAI_aem_AUtxay_7VRn54mDn_VJ2ugNPswgywsH06JRX-4GNQtqEbT1X5nKuV2dxh6dy4ONv4ruNRgfEB-i2ikvz9ur6sUOa"} []

• /img/logos/logo.jpg

[2024-05-02T04:43:24.136274+00:00] logger.ERROR: Not found. {"exception":"[object] (Slim\\Exception\\HttpNotFoundException(code: 404): Not found. at /var/task/vendor/slim/slim/Slim/Middleware/RoutingMiddleware.php:76)","method":"GET","url":"http://xxx.execute-api.ap-southeast-1.amazonaws.com:443/img/logos/logo.jpg","referrer":""} []

I have enabled Standard logging on the S3 bucket (see serverless.yml configuration) but do not see anything relevant.

How to Reproduce

constructs:
website:
type: server-side-website
certificate: ${self:custom.certificate.${self:provider.environment.ENV}}
domain: ${self:custom.websiteDomain.${self:provider.environment.ENV}}
redirectToMainDomain: ${self:custom.websiteRedirectToMainDomain.${self:provider.environment.ENV}}
assets:
'/js/': public/js
'/css/': public/css
'/fonts/': public/fonts/
'/pwa/': public/pwa/
'/img/*': public/img/
extensions:
distribution:
Properties:
DistributionConfig:
Logging:
Bucket: XXX-cloudfront-logs-bucket-${self:provider.environment.ENV}.s3.amazonaws.com
IncludeCookies: false

resources:
Resources:
Route53Records:
Type: AWS::Route53::RecordSetGroup
Properties:
HostedZoneId: ${self:custom.hostedZoneId.${self:provider.environment.ENV}}
RecordSets: ${self:custom.route53RecordSets.${self:provider.environment.ENV}}
CloudFrontLogsBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: XXX-cloudfront-logs-bucket-${self:provider.environment.ENV}
OwnershipControls:
Rules:
- ObjectOwnership: BucketOwnerPreferred

Additional Information

"serverless-lift": "^1.25"