CDNproject

This repo contains two QUIC-focused demos:

• simplecdn/: a small CDN and origin pair that serve a static website and a real sample HLS stream over HTTP/3.
• test-conMigration/: a standalone QUIC connection-migration demo.

What is implemented

• HTTP/3 origin server using quic-go/http3
• HTTP/3 CDN that fetches from the origin over QUIC
• In-memory LRU caching for normal GET/HEAD responses
• Range request bypass, so partial content stays origin-backed
• Sample HLS playlist and MPEG-TS segments in simplecdn/static/hls/
• Separate QUIC connection-migration client/server example

Run the CDN demo

Build the binaries:

cd simplecdn
make build

Run the origin server from the static asset directory:

cd simplecdn/static
../bin/server

Run the CDN in another terminal:

cd simplecdn
./bin/cdn -origin https://localhost:443 -addr :8443

Then open:

• Origin: https://localhost/
• CDN: https://localhost:8443/
• HLS playlist through the CDN: https://localhost:8443/hls/stream.m3u8

Expected behavior:

• The first CDN request for a normal asset returns X-Cache: MISS
• Repeating the same request returns X-Cache: HIT
• Requests with a Range header are forwarded and remain X-Cache: MISS

Run the connection-migration demo

Build:

cd test-conMigration
make build

Run the server:

cd test-conMigration
./bin/server

Run the client:

cd test-conMigration
QUIC_HOST=::1 QUIC_PORT=4242 ./bin/client

To demonstrate migration, keep the client running and change the client's network path or IP while the QUIC session is still open. The server logs address changes without tearing down the connection.

Tests

The automated tests cover:

• CDN cache miss-to-hit behavior
• Range request cache bypass
• HLS playlist handling
• Blocking access to origin key material

Run them with:

GOCACHE=/tmp/go-cache go test ./...
cd simplecdn && GOCACHE=/tmp/go-cache go test ./...