Add unix domain socket support

ring-jetty-adapter/project.clj

@@ -8,13 +8,15 @@
                  [ring/ring-core "1.12.2"]
                  [org.ring-clojure/ring-jakarta-servlet "1.12.2"]
                  [org.eclipse.jetty/jetty-server "11.0.21"]
+                 [org.eclipse.jetty/jetty-unixdomain-server "11.0.21"]
                  [org.eclipse.jetty.websocket/websocket-jetty-server "11.0.21"]]
   :aliases {"test-all" ["with-profile" "default:+1.10:+1.11:+1.12" "test"]}
   :profiles
   {:dev  {:dependencies [[clj-http "3.13.0"]
                          [less-awful-ssl "1.0.6"]
                          [hato "0.9.0"]]
           :jvm-opts ["-Dorg.eclipse.jetty.server.HttpChannelState.DEFAULT_TIMEOUT=500"]}
+   :test {:dependencies [[org.eclipse.jetty/jetty-client "11.0.21"]]}
    :1.10 {:dependencies [[org.clojure/clojure "1.10.3"]]}
    :1.11 {:dependencies [[org.clojure/clojure "1.11.2"]]}
    :1.12 {:dependencies [[org.clojure/clojure "1.12.0-alpha9"]]}})

ring-jetty-adapter/src/ring/adapter/jetty.clj

@@ -2,7 +2,8 @@
   "A Ring adapter that uses the Jetty 9 embedded web server.
 
   Adapters are used to convert Ring handlers into running web servers."
-  (:require [ring.util.jakarta.servlet :as servlet]
+  (:require [clojure.java.io :as io]
+            [ring.util.jakarta.servlet :as servlet]
             [ring.websocket :as ws]
             [ring.websocket.protocols :as wsp])
   (:import [java.nio ByteBuffer]
@@ -15,6 +16,7 @@
             HttpConnectionFactory
             SslConnectionFactory
             SecureRequestCustomizer]
+           [org.eclipse.jetty.unixdomain.server UnixDomainServerConnector]
            [org.eclipse.jetty.servlet ServletContextHandler ServletHandler]
            [org.eclipse.jetty.util BlockingArrayQueue]
            [org.eclipse.jetty.util.thread ThreadPool QueuedThreadPool]
@@ -161,6 +163,10 @@
   (ServerConnector. server #^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
                     (into-array ConnectionFactory factories)))
 
+(defn- unix-domain-server-connector ^UnixDomainServerConnector [^Server server & factories]
+  (UnixDomainServerConnector. server #^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
+                              (into-array ConnectionFactory factories)))
+
 (defn- http-config ^HttpConfiguration [options]
   (doto (HttpConfiguration.)
     (.setSendDateHeader (:send-date-header? options true))
@@ -229,6 +235,14 @@
       (.setHost (options :host))
       (.setIdleTimeout (options :max-idle-time 200000)))))
 
+(defn- unix-socket-connector ^ServerConnector [server options]
+  (let [http-factory (HttpConnectionFactory. (http-config options))
+        socket (io/file (options :unix-socket))]
+    (.deleteOnExit socket)
+    (doto (unix-domain-server-connector server http-factory)
+      (.setUnixDomainPath (.toPath socket))
+      (.setIdleTimeout (options :max-idle-time 200000)))))
+
 (defn- create-threadpool [options]
   (let [min-threads         (options :min-threads 8)
         max-threads         (options :max-threads 50)
@@ -253,6 +267,8 @@
       (.addConnector server (http-connector server options)))
     (when (or (options :ssl?) (options :ssl-port))
       (.addConnector server (ssl-connector server options)))
+    (when (options :unix-socket)
+      (.addConnector server (unix-socket-connector server options)))
     server))
 
 (defn run-jetty
@@ -266,6 +282,7 @@
   :async-timeout-handler  - an async handler to handle an async context timeout
   :port                   - the port to listen on (defaults to 80)
   :host                   - the hostname to listen on
+  :unix-socket            - the unix domain socket path to listen on
   :join?                  - blocks the thread until server ends
                             (defaults to true)
   :daemon?                - use daemon threads (defaults to false)

ring-jetty-adapter/test/ring/adapter/test/jetty.clj

@@ -8,10 +8,15 @@
             [ring.core.protocols :as p]
             [ring.websocket :as ws]
             [ring.websocket.protocols :as wsp])
-  (:import [java.nio ByteBuffer]
+  (:import [java.io File]
+           [java.nio ByteBuffer]
+           [java.nio.file Paths]
            [org.eclipse.jetty.util.thread QueuedThreadPool]
            [org.eclipse.jetty.server Server Request SslConnectionFactory]
            [org.eclipse.jetty.server.handler AbstractHandler]
+           [org.eclipse.jetty.io ClientConnector]
+           [org.eclipse.jetty.client HttpClient]
+           [org.eclipse.jetty.client.http HttpClientTransportOverHTTP]
            [java.net ServerSocket ConnectException]
            [java.security KeyStore]
            [java.io SequenceInputStream ByteArrayInputStream InputStream
@@ -81,6 +86,11 @@
 
 (def test-ssl-url (str "https://localhost:" test-ssl-port))
 
+(def test-unix-domain-socket
+  (let [sock-file (File/createTempFile "ring-jetty-" ".sock")]
+    (.delete sock-file)
+    (.getAbsolutePath sock-file)))
+
 (def nil-keystore
   (doto (KeyStore/getInstance (KeyStore/getDefaultType)) (.load nil)))
 
@@ -102,6 +112,22 @@
                          "text/plain"))
         (is (= (:body response) "Hello World")))))
 
+  (let [java-version (->> (System/getProperty "java.version")
+                          (re-find #"\A\d+")
+                          (Integer/parseInt))]
+    (when (>= java-version 16)
+      (testing "UNIX Socket server"
+        (with-server hello-world {:http? false
+                                  :unix-socket test-unix-domain-socket}
+          (let [path (Paths/get test-unix-domain-socket (make-array String 0))
+                connector (ClientConnector/forUnixDomain path)
+                transport (HttpClientTransportOverHTTP. connector)
+                client (doto (HttpClient. transport) (.start))
+                response (.GET client "http://localhost")]
+            (is (= (.getStatus response) 200))
+            (is (.getMediaType response) "text/plain")
+            (is (= (.getContentAsString response) "Hello World")))))))
+
   (testing "HTTPS server"
     (with-server hello-world {:port test-port
                               :ssl-port test-ssl-port