Amazon CloudFront Functions now supports logging to CloudFront access logs

CloudFront Functions Custom Log Data

You can now write custom data directly into CloudFront access logs using a new helper method available from within CloudFront Functions. This allows you to log values such as A/B test variant assignments, authentication outcomes, or routing decisions directly into the CloudFront access log record for that request.

What to do

• Use cf.logCustomData() from viewer request or viewer response functions.
• Analyze function behavior and request outcomes in a single query.
• Combine with existing console.log() functionality.

Source: AWS release notes

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