Encode multi char code points correctly in RestEasy Reactive

- Fixes quarkusio#10134 - Cherry-picks the commit from RestEasy Classic: resteasy/resteasy@a025820 (cherry picked from commit 054adb6)
gsmet · Jul 20, 2023 · 4f44f92 · 4f44f92
1 parent 5b15848
commit 4f44f92
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diff --git a/...reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/Encode.java b/...reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/Encode.java
@@ -389,6 +389,12 @@ protected static String encodeFromArray(String segment, String[] encodingMap, bo
                 result.append(currentChar);
                 continue;
             }
+            if (Character.isHighSurrogate(currentChar)) {
+                String part = segment.substring(i, i + 2);
+                result.append(URLEncoder.encode(part, StandardCharsets.UTF_8));
+                ++i;
+                continue;
+            }
             String encoding = encode(currentChar, encodingMap);
             if (encoding == null) {
                 result.append(currentChar);

diff --git a/...tive/common/runtime/src/test/java/org/jboss/resteasy/reactive/common/util/EncodeTest.java b/...tive/common/runtime/src/test/java/org/jboss/resteasy/reactive/common/util/EncodeTest.java
@@ -0,0 +1,18 @@
+package org.jboss.resteasy.reactive.common.util;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+import org.junit.jupiter.api.Test;
+
+class EncodeTest {
+    @Test
+    void encodeEmoji() {
+        String emoji = "\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00\uD83D\uDE00";
+        String encodedEmoji = URLEncoder.encode(emoji, StandardCharsets.UTF_8);
+        assertEquals(encodedEmoji, Encode.encodePath(emoji));
+        assertEquals(encodedEmoji, Encode.encodeQueryParam(emoji));
+    }
+}