Project: RSS-to-MSN Feed Converter Lambda

This project implements a generic AWS Lambda function designed to convert RSS feeds into MSN-compliant feeds. The function is structured with pluggable drivers for different feed types, making it extensible for future sources. For now, the focus is on WordPress feeds.

Technology Stack

• Runtime: Node.js
• Platform: AWS Lambda
• Storage: Amazon S3
• CDN: CloudFront

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Environment Variables

• external_feed_url – The source RSS feed URL
• feed_type – The type of feed to process (currently supports wordpress)
• feed_file_name – The target file name used when saving the completed MSN feed to S3

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Requirements & Functionality

1. Profanity Filtering

   • Downloads a profanity list from:
     https://raw.githubusercontent.com/cracked-simon/literally-profanity/refs/heads/main/final-list.json
   • Each post in the feed is checked against this list
   • Any post containing profanity is excluded from the final feed

2. Feed Transformation

   • Converts the external feed (WordPress) into MSN-specific XML format
   • Uses a driver architecture to allow future support for other feed types

3. S3 Storage

   • Saves the completed, profanity-filtered MSN feed as an object in S3
   • File is stored using the configured feed_file_name

4. CloudFront Invalidation

   • Automatically clears the CloudFront path for the feed
   • Ensures that consumers always see the latest version without caching delays

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Future Extensions

• Support for additional feed types (e.g., Medium, Blogger, custom XML)
• Configurable profanity filtering modes (exclude vs. redact)
• Enhanced monitoring/metrics (e.g., number of posts filtered, processing duration)