From 80959fa271a89272367fe58dd58dfdd6bb947c96 Mon Sep 17 00:00:00 2001
From: Tihomir Mateev <tihomir.mateev@gmail.com>
Date: Thu, 12 Dec 2024 16:57:13 +0200
Subject: [PATCH] Handle UTF-8 characters in command arguments

---
 .../io/lettuce/core/protocol/CommandArgs.java | 27 ++++++-------------
 .../core/AuthenticationIntegrationTests.java  | 15 +++++++++++
 .../core/RedisCommandBuilderUnitTests.java    | 11 ++++++++
 .../commands/AclCommandIntegrationTests.java  |  4 +--
 4 files changed, 36 insertions(+), 21 deletions(-)

diff --git a/src/main/java/io/lettuce/core/protocol/CommandArgs.java b/src/main/java/io/lettuce/core/protocol/CommandArgs.java
index da5f897852..addc78a8db 100644
--- a/src/main/java/io/lettuce/core/protocol/CommandArgs.java
+++ b/src/main/java/io/lettuce/core/protocol/CommandArgs.java
@@ -20,6 +20,7 @@
 package io.lettuce.core.protocol;
 
 import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Base64;
@@ -53,7 +54,7 @@
  */
 public class CommandArgs<K, V> {
 
-    static final byte[] CRLF = "\r\n".getBytes(StandardCharsets.US_ASCII);
+    static final byte[] CRLF = "\r\n".getBytes(StandardCharsets.UTF_8);
 
     protected final RedisCodec<K, V> codec;
 
@@ -609,16 +610,9 @@ void encode(ByteBuf target) {
         }
 
         static void writeString(ByteBuf target, String value) {
+            byte[] output = value.getBytes(StandardCharsets.UTF_8);
 
-            target.writeByte('$');
-
-            IntegerArgument.writeInteger(target, value.length());
-            target.writeBytes(CRLF);
-
-            for (int i = 0; i < value.length(); i++) {
-                target.writeByte((byte) value.charAt(i));
-            }
-            target.writeBytes(CRLF);
+            BytesArgument.writeBytes(target, output);
         }
 
         @Override
@@ -646,16 +640,11 @@ void encode(ByteBuf target) {
         }
 
         static void writeString(ByteBuf target, char[] value) {
+            final ByteBuffer byteBuffer = StandardCharsets.UTF_8.encode(CharBuffer.wrap(value));
+            final byte[] output = new byte[byteBuffer.remaining()];
+            byteBuffer.get(output);
 
-            target.writeByte('$');
-
-            IntegerArgument.writeInteger(target, value.length);
-            target.writeBytes(CRLF);
-
-            for (char c : value) {
-                target.writeByte((byte) c);
-            }
-            target.writeBytes(CRLF);
+            BytesArgument.writeBytes(target, output);
         }
 
         @Override
diff --git a/src/test/java/io/lettuce/core/AuthenticationIntegrationTests.java b/src/test/java/io/lettuce/core/AuthenticationIntegrationTests.java
index 864a2103b0..77d3f8edd8 100644
--- a/src/test/java/io/lettuce/core/AuthenticationIntegrationTests.java
+++ b/src/test/java/io/lettuce/core/AuthenticationIntegrationTests.java
@@ -37,6 +37,9 @@ void setUp(StatefulRedisConnection<String, String> connection) {
 
         connection.sync().dispatch(CommandType.ACL, new StatusOutput<>(StringCodec.UTF8),
                 new CommandArgs<>(StringCodec.UTF8).add("SETUSER").add("john").add("on").add(">foobared").add("-@all"));
+
+        connection.sync().dispatch(CommandType.ACL, new StatusOutput<>(StringCodec.UTF8),
+                new CommandArgs<>(StringCodec.UTF8).add("SETUSER").add("日本語").add("on").add(">日本語").add("+@all"));
     }
 
     @Test
@@ -71,4 +74,16 @@ void ownCredentialProvider(RedisClient client) {
         });
     }
 
+    @Test
+    @Inject
+    void authAsJapanese(RedisClient client) {
+
+        RedisURI uri = RedisURI.builder().withHost(TestSettings.host()).withPort(TestSettings.port())
+                .withAuthentication("日本語", "日本語".toCharArray()).build();
+
+        StatefulRedisConnection<String, String> connection = client.connect(uri);
+        assertThat(connection.sync().ping()).isEqualTo("PONG");
+        connection.close();
+    }
+
 }
diff --git a/src/test/java/io/lettuce/core/RedisCommandBuilderUnitTests.java b/src/test/java/io/lettuce/core/RedisCommandBuilderUnitTests.java
index d8e71cffb3..2d4f1cf405 100644
--- a/src/test/java/io/lettuce/core/RedisCommandBuilderUnitTests.java
+++ b/src/test/java/io/lettuce/core/RedisCommandBuilderUnitTests.java
@@ -32,6 +32,17 @@ class RedisCommandBuilderUnitTests {
 
     RedisCommandBuilder<String, String> sut = new RedisCommandBuilder<>(StringCodec.UTF8);
 
+    @Test()
+    void shouldCorrectlyConstructHello() {
+
+        Command<String, String, ?> command = sut.hello(3, "日本語", "日本語".toCharArray(), null);
+        ByteBuf buf = Unpooled.directBuffer();
+        command.encode(buf);
+
+        assertThat(buf.toString(StandardCharsets.UTF_8)).isEqualTo("*5\r\n" + "$5\r\n" + "HELLO\r\n" + "$1\r\n" + "3\r\n"
+                + "$4\r\n" + "AUTH\r\n" + "$9\r\n" + "日本語\r\n" + "$9\r\n" + "日本語\r\n");
+    }
+
     @Test
     void shouldCorrectlyConstructXreadgroup() {
 
diff --git a/src/test/java/io/lettuce/core/commands/AclCommandIntegrationTests.java b/src/test/java/io/lettuce/core/commands/AclCommandIntegrationTests.java
index 7fbeb7cf9f..4d154dc0f7 100644
--- a/src/test/java/io/lettuce/core/commands/AclCommandIntegrationTests.java
+++ b/src/test/java/io/lettuce/core/commands/AclCommandIntegrationTests.java
@@ -131,7 +131,7 @@ void aclLog() {
 
     @Test
     void aclList() {
-        assertThat(redis.aclList()).hasSize(1).first().asString().contains("user default");
+        assertThat(redis.aclList()).hasSize(2).first().asString().contains("user default");
     }
 
     @Test
@@ -161,7 +161,7 @@ void aclSetuserWithCategories() {
 
     @Test
     void aclUsers() {
-        assertThat(redis.aclUsers()).hasSize(1).first().isEqualTo("default");
+        assertThat(redis.aclUsers()).hasSize(2).first().isEqualTo("default");
     }
 
     @Test