test: add smoke tests for caddy and unix sockets

.devcontainer/devcontainer.json

@@ -21,7 +21,8 @@
         "golang.go",
         "unifiedjs.vscode-mdx",
         "a-h.templ",
-        "redhat.vscode-yaml"
+        "redhat.vscode-yaml",
+        "matthewpi.caddyfile-support"
       ]
     }
   }

.devcontainer/docker-compose.yaml

@@ -20,7 +20,11 @@ services:
       dockerfile: .devcontainer/Dockerfile
     volumes:
       - ../:/workspace/anubis:cached
+      - node_modules:/workspace/anubis/node_modules
     environment:
       VALKEY_URL: redis://valkey:6379/0
     #entrypoint: ["/usr/bin/sleep", "infinity"]
     user: vscode
+
+volumes:
+  node_modules:

.devcontainer/poststart.sh

@@ -1,9 +1,10 @@
 #!/usr/bin/env bash
 
-pwd
+sudo chown -R vscode:vscode ./node_modules
 
 npm ci &
 go mod download &
 go install ./utils/cmd/... &
+go install mvdan.cc/sh/v3/cmd/shfmt@latest &
 
 wait

.github/actions/spelling/expect.txt

@@ -32,7 +32,7 @@ byteslice
 Bytespider
 cachebuster
 cachediptoasn
-Caddyfile
+caddyfile
 caninetools
 Cardyb
 celchecker
@@ -181,6 +181,7 @@ lol
 lominsa
 maintainership
 malware
+matthewpi
 mcr
 memes
 metarefresh

.github/workflows/smoke-tests.yml

@@ -14,10 +14,12 @@ jobs:
     strategy:
       matrix:
         test:
+          - caddy
           - git-clone
           - git-push
           - healthcheck
           - i18n
+          - unix-socket-xff
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code

.vscode/extensions.json

@@ -5,6 +5,7 @@
     "golang.go",
     "unifiedjs.vscode-mdx",
     "a-h.templ",
-    "redhat.vscode-yaml"
+    "redhat.vscode-yaml",
+    "matthewpi.caddyfile-support"
   ]
 }

cmd/anubis/main.go

@@ -166,19 +166,19 @@ func setupListener(network string, address string) (net.Listener, string) {
 
 	// additional permission handling for unix sockets
 	if network == "unix" {
+		slog.Debug("parsing socket mode", "mode_string", *socketMode, "address", address)
+
 		mode, err := strconv.ParseUint(*socketMode, 8, 0)
 		if err != nil {
 			listener.Close()
-			log.Fatal(fmt.Errorf("could not parse socket mode %s: %w", *socketMode, err))
+			slog.Error("could not parse socket mode", "mode", *socketMode, "err", err)
+			os.Exit(1)
 		}
 
-		err = os.Chmod(address, os.FileMode(mode))
-		if err != nil {
-			err := listener.Close()
-			if err != nil {
-				log.Printf("failed to close listener: %v", err)
-			}
-			log.Fatal(fmt.Errorf("could not change socket mode: %w", err))
+		if err := os.Chmod(address, os.FileMode(mode)); err != nil {
+			// Ignore chmod errors on Unix domain sockets - this is expected behavior
+			// on many systems/containers where socket permissions cannot be changed
+			slog.Debug("chmod failed on socket (ignoring)", "path", address, "err", err)
 		}
 	}
 

test/anubis_configs/less_paranoid.yaml

@@ -0,0 +1,10 @@
+bots:
+  - name: challenge
+    user_agent_regex: Mozilla
+    action: WEIGH
+    weight:
+      adjust: 10
+
+status_codes:
+  CHALLENGE: 401
+  DENY: 403

test/caddy/Caddyfile

@@ -1,12 +1,5 @@
-:80 {
-	reverse_proxy http://anubis:3000 {
-		header_up X-Real-Ip {remote_host}
-		header_up X-Http-Version {http.request.proto}
-	}
-}
-
-:443 {
-	tls /etc/techaro/pki/caddy.local.cetacean.club/cert.pem /etc/techaro/pki/caddy.local.cetacean.club/key.pem
+caddy.local.cetacean.club {
+	tls internal
 
 	reverse_proxy http://anubis:3000 {
 		header_up X-Real-Ip {remote_host}

test/caddy/docker-compose.yaml

@@ -5,18 +5,16 @@ services:
     ports:
       - 8080:80
       - 8443:443
-    volumes:
-      - "../pki/caddy.local.cetacean.club:/etc/techaro/pki/caddy.local.cetacean.club/"
 
   anubis:
-    image: ghcr.io/techarohq/anubis:main
+    image: ghcr.io/techarohq/anubis
     environment:
       BIND: ":3000"
       TARGET: http://httpdebug:3000
-      POLICY_FNAME: /etc/techaro/anubis/less_paranoid.yaml
+      POLICY_FNAME: /cfg/less_paranoid.yaml
+      SLOG_LEVEL: DEBUG
     volumes:
-      - ../anubis_configs:/etc/techaro/anubis
+      - ../anubis_configs:/cfg
 
   httpdebug:
     image: ghcr.io/xe/x/httpdebug
-    pull_policy: always

test/caddy/test.mjs

@@ -0,0 +1,27 @@
+async function testWithUserAgent(userAgent) {
+  const statusCode =
+    await fetch("https://caddy.local.cetacean.club:8443/reqmeta", {
+      headers: {
+        "User-Agent": userAgent,
+      }
+    })
+      .then(resp => resp.status);
+  return statusCode;
+}
+
+const codes = {
+  Mozilla: await testWithUserAgent("Mozilla"),
+  curl: await testWithUserAgent("curl"),
+}
+
+const expected = {
+  Mozilla: 401,
+  curl: 200,
+};
+
+console.log("Mozilla:", codes.Mozilla);
+console.log("curl:   ", codes.curl);
+
+if (JSON.stringify(codes) !== JSON.stringify(expected)) {
+  throw new Error(`wanted ${JSON.stringify(expected)}, got: ${JSON.stringify(codes)}`);
+}

test/caddy/test.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -x
+
+set -euo pipefail
+
+source ../lib/lib.sh
+
+build_anubis_ko
+
+docker compose up -d --build
+
+export NODE_TLS_REJECT_UNAUTHORIZED=0
+
+sleep 2
+
+backoff-retry node test.mjs

test/lib/lib.sh

@@ -0,0 +1,54 @@
+REPO_ROOT=$(git rev-parse --show-toplevel)
+(cd $REPO_ROOT && go install ./utils/cmd/...)
+
+function cleanup() {
+  pkill -P $$
+
+  if [ -f "docker-compose.yaml" ]; then
+    docker compose down
+  fi
+}
+
+trap cleanup EXIT SIGINT
+
+function build_anubis_ko() {
+  (
+    cd ../.. &&
+      VERSION=devel ko build \
+        --platform=all \
+        --base-import-paths \
+        --tags="latest" \
+        --image-user=1000 \
+        --image-annotation="" \
+        --image-label="" \
+        ./cmd/anubis \
+        --local
+  )
+}
+
+function mint_cert() {
+  if [ "$#" -ne 1 ]; then
+    echo "Usage: mint_cert <domain.name>"
+  fi
+
+  domainName="$1"
+
+  # If the transient local TLS certificate doesn't exist, mint a new one
+  if [ ! -f "../pki/${domainName}/cert.pem" ]; then
+    # Subshell to contain the directory change
+    (
+      cd ../pki &&
+        mkdir -p "${domainName}" &&
+        # Try using https://github.com/FiloSottile/mkcert for better DevEx,
+        # but fall back to using https://github.com/jsha/minica in case
+        # you don't have that installed.
+        (
+          mkcert \
+            --cert-file ./"${domainName}"/cert.pem \
+            --key-file ./"${domainName}"/key.pem \
+            "${domainName}" ||
+            go tool minica -domains "${domainName}"
+        )
+    )
+  fi
+}

test/unix-socket-xff/test.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+source ../lib/lib.sh
+
+mint_cert "relayd.local.cetacean.club"
+
+# Build static assets
+(cd ../.. && npm ci && npm run assets)
+
+# Spawn three jobs:
+
+# HTTP daemon that listens over a unix socket (implicitly ./unixhttpd.sock)
+go run ../cmd/unixhttpd &
+
+# A copy of Anubis, specifically for the current Git checkout
+go tool anubis \
+  --bind=./anubis.sock \
+  --bind-network=unix \
+  --socket-mode=0700 \
+  --policy-fname=../anubis_configs/aggressive_403.yaml \
+  --target=unix://$(pwd)/unixhttpd.sock &
+
+# A simple TLS terminator that forwards to Anubis, which will forward to
+# unixhttpd
+go run ../cmd/relayd \
+  --proxy-to=unix://./anubis.sock \
+  --cert-dir=../pki/relayd.local.cetacean.club &
+
+export NODE_TLS_REJECT_UNAUTHORIZED=0
+
+backoff-retry node test.mjs