Fully replaced AsyncHttpClient (#1194)

gradle/libs.versions.toml

@@ -15,7 +15,6 @@ spotless = "com.diffplug.spotless:6.12.0"
 adventure-bom = "net.kyori:adventure-bom:4.15.0-SNAPSHOT"
 adventure-facet = "net.kyori:adventure-platform-facet:4.3.0"
 asm = "org.ow2.asm:asm:9.5"
-asynchttpclient = "org.asynchttpclient:async-http-client:2.12.3"
 brigadier = "com.velocitypowered:velocity-brigadier:1.0.0-SNAPSHOT"
 bstats = "org.bstats:bstats-base:3.0.1"
 caffeine = "com.github.ben-manes.caffeine:caffeine:3.1.5"

proxy/build.gradle.kts

@@ -119,7 +119,6 @@ dependencies {
     implementation(platform(libs.adventure.bom))
     implementation("net.kyori:adventure-nbt")
     implementation(libs.adventure.facet)
-    implementation(libs.asynchttpclient)
     implementation(libs.completablefutures)
     implementation(libs.nightconfig)
     implementation(libs.bstats)

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -101,7 +101,6 @@ import net.kyori.adventure.translation.GlobalTranslator;
 import net.kyori.adventure.translation.TranslationRegistry;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.asynchttpclient.AsyncHttpClient;
 import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -595,10 +594,6 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
   }
 
   public HttpClient getHttpClient() {
-    return httpClient;
-  }
-
-  public AsyncHttpClient getAsyncHttpClient() {
     return cm.getHttpClient();
   }
 

proxy/src/main/java/com/velocitypowered/proxy/connection/client/InitialLoginSessionHandler.java

@@ -209,7 +209,11 @@ public class InitialLoginSessionHandler implements MinecraftSessionHandler {
         url += "&ip=" + urlFormParameterEscaper().escape(playerIp);
       }
 
-      HttpRequest httpRequest = HttpRequest.newBuilder().uri(URI.create(url)).build();
+      final HttpRequest httpRequest = HttpRequest.newBuilder()
+              .setHeader("User-Agent",
+                      server.getVersion().getName() + "/" + server.getVersion().getVersion())
+              .uri(URI.create(url))
+              .build();
       server.getHttpClient().sendAsync(httpRequest, HttpResponse.BodyHandlers.ofString())
           .whenCompleteAsync((response, throwable) -> {
             if (mcConnection.isClosed()) {

proxy/src/main/java/com/velocitypowered/proxy/network/ConnectionManager.java

@@ -17,9 +17,6 @@
 
 package com.velocitypowered.proxy.network;
 
-import static org.asynchttpclient.Dsl.asyncHttpClient;
-import static org.asynchttpclient.Dsl.config;
-
 import com.google.common.base.Preconditions;
 import com.velocitypowered.api.event.proxy.ListenerBoundEvent;
 import com.velocitypowered.api.event.proxy.ListenerCloseEvent;
@@ -37,15 +34,11 @@ import io.netty.channel.EventLoopGroup;
 import io.netty.channel.WriteBufferWaterMark;
 import io.netty.util.concurrent.GlobalEventExecutor;
 import java.net.InetSocketAddress;
+import java.net.http.HttpClient;
 import java.util.HashMap;
 import java.util.Map;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.asynchttpclient.AsyncHttpClient;
-import org.asynchttpclient.RequestBuilder;
-import org.asynchttpclient.filter.FilterContext;
-import org.asynchttpclient.filter.FilterContext.FilterContextBuilder;
-import org.asynchttpclient.filter.RequestFilter;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -69,7 +62,7 @@ public final class ConnectionManager {
   public final BackendChannelInitializerHolder backendChannelInitializer;
 
   private final SeparatePoolInetNameResolver resolver;
-  private final AsyncHttpClient httpClient;
+  private final HttpClient httpClient;
 
   /**
    * Initalizes the {@code ConnectionManager}.
@@ -86,21 +79,10 @@ public final class ConnectionManager {
     this.backendChannelInitializer = new BackendChannelInitializerHolder(
         new BackendChannelInitializer(this.server));
     this.resolver = new SeparatePoolInetNameResolver(GlobalEventExecutor.INSTANCE);
-    this.httpClient = asyncHttpClient(config()
-        .setEventLoopGroup(this.workerGroup)
-        .setUserAgent(server.getVersion().getName() + "/" + server.getVersion().getVersion())
-        .addRequestFilter(new RequestFilter() {
-          @Override
-          public <T> FilterContext<T> filter(FilterContext<T> ctx) {
-            return new FilterContextBuilder<>(ctx)
-                .request(new RequestBuilder(ctx.getRequest())
-                    .setNameResolver(resolver)
-                    .build())
+    this.httpClient = HttpClient.newBuilder()
+            .executor(this.workerGroup)
             .build();
   }
-        })
-        .build());
-  }
 
   public void logChannelInformation() {
     LOGGER.info("Connections will use {} channels, {} compression, {} ciphers", this.transportType,
@@ -256,8 +238,8 @@ public final class ConnectionManager {
     return this.serverChannelInitializer;
   }
 
-  public AsyncHttpClient getHttpClient() {
-    return httpClient;
+  public HttpClient getHttpClient() {
+    return this.httpClient;
   }
 
   public BackendChannelInitializerHolder getBackendChannelInitializer() {