DrPodcast

Automated podcast RSS feed generator for DR (Danmarks Radio). Generates iTunes-compatible RSS feeds for 41 Danish podcasts as a self-hosted web server with periodic background refresh.

Quick Start

Prerequisites

• .NET 10.0 SDK
• DR API key

Run from Source

dotnet restore src/DrPodcast.csproj
dotnet build src/DrPodcast.csproj -c Release

export API_KEY="your-dr-api-key"
export BASE_URL="https://your-domain.com"
dotnet run --project src/DrPodcast.csproj

Docker

docker pull ghcr.io/YOUR_ORG/drpodcast:latest
docker run -e API_KEY=<key> -e BASE_URL=<url> -p 8080:8080 ghcr.io/YOUR_ORG/drpodcast:latest

Configuration

Environment Variables

Variable	Required	Default	Description
API_KEY	Yes	—	DR API key
BASE_URL	No	https://example.com	Base URL for feed URLs in RSS output
PREFER_MP4	No	false	Prefer MP4/M4A audio over MP3; enables /proxy/audio endpoint
REFRESH_INTERVAL_MINUTES	No	15	How often feeds are regenerated in the background

Adding Podcasts

Edit podcasts.json:

{
  "podcasts": [
    { "slug": "example-podcast", "urn": "urn:dr:radio:series:..." }
  ]
}

Testing

dotnet test tests/DrPodcast.Tests/DrPodcast.Tests.csproj

Project Structure

src/
  PodcastFeedGenerator.cs      # Entry point: HTTP server, audio proxy, rate limiting
  FeedGenerationService.cs     # RSS feed generation and DR API integration
  FeedRefreshBackgroundService.cs  # Periodic background refresh with backoff
  PodcastModels.cs             # Data models with source-generated JSON serialization
  PodcastHelpers.cs            # Image URL extraction
  WebsiteGenerator.cs          # Static website and manifest generation
  podcasts.json                # List of podcast slugs and URNs
tests/                         # xUnit test suite
site/                          # Static website assets for feed browsing
.github/workflows/
  build-and-release.yml        # Docker build, versioning, and GitHub releases

Technical Details

• .NET 10.0 with NativeAOT compilation (trim-safe, invariant globalization)
• Polly retry policies for resilient HTTP against the DR API
• RSS 2.0 with iTunes and Atom namespaces
• Source-generated JSON serialization
• Atomic feed writes (temp file → rename) to avoid serving partial content
• Sliding window rate limiter on the audio proxy (20 req/min per IP)
• Change detection via <lastBuildDate> comparison to skip unnecessary regenerations

License

This project is provided as-is for educational purposes.