Initial allowance of unexpected responses
authorBernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Fri, 25 Jun 2004 14:29:09 +0000 (14:29 +0000)
committerBernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Fri, 25 Jun 2004 14:29:09 +0000 (14:29 +0000)
sql-edition/servers/VendServer.py

index 57a2682..9221a4d 100755 (executable)
@@ -5,6 +5,10 @@ from popen2 import popen2
 from pyPgSQL import PgSQL
 from LATClient import LATClient
 
+asynchronous_responses = [     '400', '401', # door open/closed
+                                                       '610',        # switches changed
+                                                ]
+
 class VendingMachine:
        def __init__(self, rfh, wfh):
                self.rfh = rfh
@@ -17,24 +21,26 @@ class VendingMachine:
                state = 0
                s = ''
                while state != 3:
-                   s = self.rfh.read(1)
-                   if s == '': raise Exception
-                   if s == '\n' and state == 0: state = 1
-                   if s == '#' and state == 1: state = 2
-                   if s == ' ' and state == 2: state = 3
+                       s = self.rfh.read(1)
+                       if s == '': raise Exception
+                       if s == '\n' and state == 0: state = 1
+                       if (s == '#' or s == '%') and state == 1: state = 2
+                       if s == ' ' and state == 2: state = 3
 
        def get_response(self):
                self.wfh.flush()
                s = ''
                while s == '':
-                   s = self.rfh.readline()
-                   if s == '': return None
-                   s = s.strip('\r\n')
-               return s
+                       s = self.rfh.readline()
+                       if s == '': return None
+                       s = s.strip('\r\n')
+               return (s[0:3], s[4:])
 
        def ping(self):
                self.wfh.write('PING\n')
-               return self.get_response()
+               (code, string) = self.get_response()
+               return code == '000'
+
 
 if __name__ == '__main__':
        # Open vending machine via LAT

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