redis 加入key扫描

lib/base/redis/redis.dart

@@ -124,6 +124,29 @@ class Redis {
       return false;
     }
   }
+
+  Future<List<String>> scanKeys(String key, {int timeout = 30}) async {
+    List<String> keys = [];
+    int cursor = 0;
+    try {
+      do {
+        final result = await _command
+            ?.send_object(['SCAN', cursor.toString(), 'MATCH', key]);
+        final List<dynamic> scanResult = result as List<dynamic>;
+        cursor = int.parse(scanResult[0] as String);
+        final List<dynamic> foundKeys = scanResult[1] as List<dynamic>;
+
+        keys.addAll(foundKeys.map((k) => k.toString()));
+      } while (cursor != 0);
+
+      // return await scanKeys(cmd, pattern)
+      // .timeout(Duration(seconds: timeoutSeconds));
+    } catch (e) {
+      print('Scan failed: $e');
+      return [];
+    }
+    return keys;
+  }
 }
 
 class RedisConfig {