release: 2.1.1

- Fixes Concurrent Modification on Broadcast
- Increase netty version to 4.1.97-Final

build.gradle.kts

@@ -11,7 +11,7 @@ val authorName = "ccbluex"
 val projectUrl = "https://github.com/ccbluex/netty-httpserver"
 
 group = "net.ccbluex"
-version = "2.1.0"
+version = "2.1.1"
 
 repositories {
     mavenCentral()
@@ -30,7 +30,7 @@ dependencies {
     // https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core
     implementation("org.apache.logging.log4j:log4j-core:2.23.1")
     // https://mvnrepository.com/artifact/io.netty/netty-all
-    implementation("io.netty:netty-all:4.1.82.Final")
+    implementation("io.netty:netty-all:4.1.97.Final")
     // https://mvnrepository.com/artifact/com.google.code.gson/gson
     implementation("com.google.code.gson:gson:2.10.1")
     // https://mvnrepository.com/artifact/org.apache.tika/tika-core

src/main/kotlin/net/ccbluex/netty/http/HttpServerHandler.kt

@@ -82,7 +82,7 @@ internal class HttpServerHandler(private val server: HttpServer) : ChannelInboun
                         handshaker.handshake(ctx.channel(), msg)
                     }
 
-                    server.webSocketController.activeContexts += ctx
+                    server.webSocketController.addContext(ctx)
                 } else {
                     val requestContext = RequestContext(
                         msg.method(),

src/main/kotlin/net/ccbluex/netty/http/websocket/WebSocketController.kt

@@ -21,7 +21,7 @@ package net.ccbluex.netty.http.websocket
 
 import io.netty.channel.ChannelHandlerContext
 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame
-import io.netty.handler.codec.http.websocketx.WebSocketFrame
+import java.util.concurrent.CopyOnWriteArrayList
 
 /**
  * Controller for handling websocket connections.
@@ -32,7 +32,7 @@ class WebSocketController {
      * Keeps track of all connected websocket connections to the server.
      * This is used to broadcast messages to all connected clients.
      */
-    val activeContexts = mutableListOf<ChannelHandlerContext>()
+    private val activeContexts = CopyOnWriteArrayList<ChannelHandlerContext>()
 
     /**
      * Broadcasts a message to all connected clients.
@@ -53,10 +53,30 @@ class WebSocketController {
     /**
      * Closes all active contexts.
      */
-    fun closeAll() {
-        activeContexts.forEach { handlerContext ->
-            handlerContext.channel().close()
+    fun disconnect() {
+        activeContexts.removeIf { handlerContext ->
+            runCatching {
+                handlerContext.channel().close().sync()
+            }.isSuccess
         }
     }
 
+    /**
+     * Adds a new context to the list of active contexts.
+     *
+     * @param context The context to add.
+     */
+    fun addContext(context: ChannelHandlerContext) {
+        activeContexts.add(context)
+    }
+
+    /**
+     * Removes a context from the list of active contexts.
+     *
+     * @param context The context to remove.
+     */
+    fun removeContext(context: ChannelHandlerContext) {
+        activeContexts.remove(context)
+    }
+
 }

src/main/kotlin/net/ccbluex/netty/http/websocket/WebSocketHandler.kt

@@ -51,7 +51,7 @@ internal class WebSocketHandler(private val server: HttpServer) : ChannelInbound
                     ctx.channel().writeAndFlush(msg.retainedDuplicate())
                     ctx.channel().close().sync()
 
-                    server.webSocketController.activeContexts -= ctx
+                    server.webSocketController.removeContext(ctx)
                     logger.debug("WebSocket closed due to ${msg.reasonText()} (${msg.statusCode()})")
                 }
                 else -> logger.error("Unknown WebSocketFrame type: ${msg.javaClass.name}")