AWS Lambda Feedbag

An AWS Lambda function that provides an HTTP API for Feedbag, a Ruby gem for discovering RSS/Atom feeds from URLs.

Endpoint

POST https://fitzwmnm61.execute-api.eu-west-3.amazonaws.com/default/feedbag/find

Usage

Send a URL as the POST body to discover RSS/Atom feeds:

# Discover feeds from a URL
curl -X POST -d "https://nytimes.com" \
    https://fitzwmnm61.execute-api.eu-west-3.amazonaws.com/default/feedbag/find

# Response:
# {"codeStatus":200,"output":["https://rss.nytimes.com/services/xml/rss/nyt/HomePage.xml"]}

# Invalid URL handling
curl -X POST -d "not-a-valid-url@#$" \
    https://fitzwmnm61.execute-api.eu-west-3.amazonaws.com/default/feedbag/find

# Response:
# {"codeStatus":400,"output":"URI::InvalidURIError"}

Development

Requirements

• Ruby 3.2+ (AWS Lambda supports Ruby 3.4)
• Docker (for container deployment)
• AWS CLI configured with appropriate credentials

Local Setup

# Install dependencies
bundle install

# Or use Make
make bundle

Deployment

Option 1: Zip Deployment (Traditional)

make deploy-zip

This bundles the code with vendored gems and uploads to Lambda.

Option 2: Container Deployment

# Build the Docker image
make build

# Follow the instructions to push to ECR and update Lambda
make deploy-container

Configuration

Environment variables in the Makefile:

• FUNCTION_NAME - Lambda function name (default: feedbag_find)
• AWS_REGION - AWS region (default: eu-west-3)
• ECR_REPO - ECR repository name for container deployment (default: feedbag-lambda)

Response Format

{
  "codeStatus": 200,
  "output": ["https://example.com/feed.xml", "https://example.com/atom.xml"]
}

Error Responses

codeStatus	output	Description
400	"No data defined"	No URL provided in POST body
400	"SocketError"	Network error connecting to URL
400	"URI::InvalidURIError"	Invalid URL format

License

Same as Feedbag.