Add config option to change server port

build.gradle

@@ -10,7 +10,7 @@ repositories {
 	mavenCentral()
 }
 
-def runeLiteVersion = '1.6.10.1'
+def runeLiteVersion = '1.6.27'
 
 dependencies {
 	compileOnly group: 'net.runelite', name:'client', version: runeLiteVersion

src/main/java/info/sigterm/plugins/httpserver/HttpServerConfig.java

@@ -0,0 +1,21 @@
+package info.sigterm.plugins.httpserver;
+
+import net.runelite.client.config.Config;
+import net.runelite.client.config.ConfigGroup;
+import net.runelite.client.config.ConfigItem;
+
+@ConfigGroup("httpserver")
+public interface HttpServerConfig extends Config
+{
+
+    @ConfigItem(
+            keyName = "ports",
+            name = "Server Port",
+            description = "Comma separated list of ports. The first free port will be used."
+    )
+    default String ports()
+    {
+        return "8080";
+    }
+
+}

src/main/java/info/sigterm/plugins/httpserver/HttpServerPlugin.java

@@ -2,6 +2,7 @@
 
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
+import com.google.inject.Provides;
 import com.sun.net.httpserver.HttpExchange;
 import com.sun.net.httpserver.HttpHandler;
 import com.sun.net.httpserver.HttpServer;
@@ -12,6 +13,7 @@
 import javax.inject.Inject;
 import net.runelite.api.Client;
 import net.runelite.api.Skill;
+import net.runelite.client.config.ConfigManager;
 import net.runelite.client.plugins.Plugin;
 import net.runelite.client.plugins.PluginDescriptor;
 import net.runelite.http.api.RuneLiteAPI;
@@ -24,15 +26,33 @@ public class HttpServerPlugin extends Plugin
 	@Inject
 	private Client client;
 
+	@Inject
+	private HttpServerConfig config;
+
 	private HttpServer server;
 
 	@Override
 	protected void startUp() throws Exception
 	{
-		server = HttpServer.create(new InetSocketAddress(8080), 0);
-		server.createContext("/stats", new StatsHandler());
-		server.setExecutor(Executors.newSingleThreadExecutor());
-		server.start();
+
+		String[] ports = config.ports().split(",");
+		Exception ex = null;
+
+		for (String port : ports) {
+			try {
+				server = HttpServer.create(new InetSocketAddress(Integer.parseInt(port)), 0);
+				server.createContext("/stats", new StatsHandler());
+				server.setExecutor(Executors.newSingleThreadExecutor());
+				server.start();
+				return;
+			} catch (Exception e) {
+				ex = e;
+			}
+		}
+
+		if (ex != null) {
+			throw ex;
+		}
 	}
 
 	@Override
@@ -41,6 +61,12 @@ protected void shutDown() throws Exception
 		server.stop(1);
 	}
 
+	@Provides
+	HttpServerConfig provideConfig(ConfigManager configManager)
+	{
+		return configManager.getConfig(HttpServerConfig.class);
+	}
+
 	class StatsHandler implements HttpHandler
 	{
 		@Override