Add timer for device list

diff --git a/sztool b/sztool
index dc9157a..ba59b45 100755 (executable)
--- a/sztool
+++ b/sztool
@@ -6,6 +6,7 @@ import argparse
 import sys
 from uuid import getnode as get_mac
 import ast
+import threading
 
 MQTT_SERVER = 'mqtt.suanzi.ai'
 MQTT_PORT = 1883
@@ -18,6 +19,8 @@ def on_connect(client, userdata, flags, rc):
         payload = {'from':userdata['id'], 'type':'request', 'command':'ssh'}
         client.publish(userdata['to'], str(payload))
     elif userdata['action'] == 'list':
+        timer = threading.Timer(5, timeout)
+        timer.start()
         payload = {'from':userdata['id'], 'type':'request', 'command':'list'}
         client.publish(userdata['to'], str(payload))
 
@@ -26,20 +29,24 @@ def on_message(client, userdata, msg):
     payload = ast.literal_eval(str(msg.payload))
     from_id = payload['from']
     if payload['type'] == 'response':
+        print payload['command']
         if payload['command'] == 'ssh':
             port = payload['data']
             print 'run "ssh ' + URI + ' -p ' + str(port) + '" to connect to device (%s)' % from_id
+            client.disconnect()
+            sys.exit(0)
         elif payload['command'] == 'list':
             print payload['from'], payload['data']
-        client.disconnect()
-        sys.exit(0)
-
-
 
 def get_mac_str():
     mac = hex(get_mac())
     return '{:0>12}'.format(mac[2:-1])
 
+def timeout():
+    print 'timeout'
+    client.disconnect()
+    sys.exit(0)
+
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='Choose an avaiable port and run ssh.')