refactor: 添加 websocket 连接认证拦截器实现点对点指定用户发送消息；移除 easy-captcha 替换为 hutool-captcha验证码实现代码简化；重构认证接口控制层代码。

src/main/java/com/youlai/system/util/ResponseUtils.java

@@ -0,0 +1,46 @@
+package com.youlai.system.util;
+
+import cn.hutool.json.JSONUtil;
+import com.youlai.system.common.result.Result;
+import com.youlai.system.common.result.ResultCode;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * 响应工具类
+ *
+ * @author haoxr
+ * @since 2.0.0
+ */
+public class ResponseUtils {
+
+    /**
+     * 异常消息返回(适用过滤器中处理异常响应)
+     *
+     * @param response
+     * @param resultCode
+     */
+    public static void writeErrMsg(HttpServletResponse response, ResultCode resultCode) throws IOException {
+        switch (resultCode) {
+            case ACCESS_UNAUTHORIZED:
+            case TOKEN_INVALID:
+                response.setStatus(HttpStatus.UNAUTHORIZED.value());
+                break;
+            case TOKEN_ACCESS_FORBIDDEN:
+                response.setStatus(HttpStatus.FORBIDDEN.value());
+                break;
+            default:
+                response.setStatus(HttpStatus.BAD_REQUEST.value());
+                break;
+        }
+        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
+        response.setCharacterEncoding("UTF-8");
+        response.getWriter().print(JSONUtil.toJsonStr(Result.failed(resultCode)));
+    }
+
+
+}