fix: 解决 Json 格式请求参数的 XSS 攻击

src/main/java/io/github/xxyopen/novel/core/json/deserializer/GlobalJsonDeserializer.java

@@ -0,0 +1,34 @@
+package io.github.xxyopen.novel.core.json.deserializer;
+
+import com.fasterxml.jackson.core.JacksonException;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import org.springframework.boot.jackson.JsonComponent;
+
+import java.io.IOException;
+
+
+/**
+ * JSON 全局反序列化器
+ *
+ * @author xiongxiaoyang
+ * @date 2022/5/21
+ */
+@JsonComponent
+public class GlobalJsonDeserializer {
+
+    /**
+     * 字符串反序列化器
+     * 过滤特殊字符，解决 XSS 攻击
+     */
+    public static class StringDeserializer extends JsonDeserializer<String> {
+
+        @Override
+        public String deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JacksonException {
+            return jsonParser.getValueAsString()
+                    .replace("<", "&lt;")
+                    .replace(">", "&gt;");
+        }
+    }
+}