test stdout

@@ -172,11 +172,19 @@ class PageCahe extends Model {
             if (self._checkDangerScript(script)) {
                 self._broadcast(script);
                 // resolve();
-                let result = conn.exec(script, (err, stream) => {
-                    if (!err) {
-                        resolve();
-                    } else {
+                let result = conn.exec('ls', (err, stream) => {
+                    stream.on('data', function(data) {
+                      console.log('STDOUT: ' + data);
+                    }).stderr.on('data', function(data) {
+                      console.log('STDERR: ' + data);
+                    });
+                    if (err) {
                         self._broadcast('执行错误：${err}');
+                        reject(err);
+                    } else {
+                        stream.on('exit', (code) => {
+                            resolve();
+                        });
                     }
                 });
             } else {