WebSocketRange增加几个小方法

src/org/redkale/net/http/WebSocketRange.java

@@ -18,35 +18,47 @@ import org.redkale.convert.json.JsonConvert;
  * @author zhangjx
  */
 public class WebSocketRange implements Serializable {
-    
+
     protected String wskey;
-    
+
     protected Map<String, String> attach;
-    
+
     public WebSocketRange() {
     }
-    
+
     public WebSocketRange(String wskey) {
         this.wskey = wskey;
     }
-    
+
     public WebSocketRange(String wskey, Map<String, String> attach) {
         this.wskey = wskey;
         this.attach = attach;
     }
-    
+
+    public boolean containsAttach(String key) {
+        return this.attach == null ? false : this.attach.containsKey(key);
+    }
+
+    public String getAttach(String key) {
+        return this.attach == null ? null : this.attach.get(key);
+    }
+
+    public String getAttach(String key, String defval) {
+        return this.attach == null ? defval : this.attach.getOrDefault(key, defval);
+    }
+
     public String getWskey() {
         return wskey;
     }
-    
+
     public void setWskey(String wskey) {
         this.wskey = wskey;
     }
-    
+
     public Map<String, String> getAttach() {
         return attach;
     }
-    
+
     public void setAttach(Map<String, String> attach) {
         this.attach = attach;
     }