doorwatch: add longpoll support

1 files changed, 10 insertions, 4 deletions

diff --git a/doorwatch.py b/doorwatch.py
index c88ac6a..64a9fbd 100644
--- a/doorwatch.py
+++ b/doorwatch.py
@@ -5,33 +5,39 @@
 
 import subprocess
 import os
-import urllib
+import urllib2
 import json
 import sys
 import time
 
 if __name__ == '__main__':
     workdir = os.path.realpath(os.path.dirname(__file__))
-    was_closed = False # Don't ding at startup
+    was_closed = False # Only react to changes
+    last_ref = None
 
     while True:
         time.sleep(1)
 
         try:
             r = None
-            r = urllib.urlopen('http://172.22.83.5/subcan.json')
+            req_url = 'http://beaglebone.local.sublab.org/longpoll'
+            if last_ref is not None:
+                req_url += '?' + last_ref
+            r = urllib2.urlopen(req_url, timeout=120)
             data = json.loads(r.read())
         except Exception:
             sys.excepthook(*sys.exc_info())
+            last_ref = None
             continue
         finally:
             if r is not None:
                 r.close()
 
+        last_ref = data['ref']
         closed = data['door.left']['value']
         if was_closed and not closed:
             print "Door has been opened!"
-            subprocess.call(['paplay', os.path.join(workdir, 'doorwatch.wav')])
+            subprocess.call(['paplay', '--volume=32661', os.path.join(workdir, 'doorwatch.wav')])
         if not was_closed and closed:
             print "Door has been closed."
         was_closed = closed