X-Git-Url: https://git.ucc.asn.au/?p=zanchey%2Fdispense2.git;a=blobdiff_plain;f=sql-edition%2Fservers%2FVendingMachine.py;h=4a409221a536f2fed9dbef3273775c7ef7a56218;hp=e242df8baa640cc418a5c1dbf396506887c22279;hb=1b24fcf5041fa3cb7e783d57fb271ab4869c348b;hpb=f581ca4aaf52ec51084e27672717c2bd08e85dbb

diff --git a/sql-edition/servers/VendingMachine.py b/sql-edition/servers/VendingMachine.py
index e242df8..4a40922 100644
--- a/sql-edition/servers/VendingMachine.py
+++ b/sql-edition/servers/VendingMachine.py
@@ -1,7 +1,8 @@
 # vim:ts=4
-import re, pg
+import re
 from CRC import do_crc
 from select import select
+import socket, logging
 
 asynchronous_responses = [	'400', '401', # door open/closed
 				'610',        # switches changed
@@ -12,6 +13,8 @@ DOOR = 1
 SWITCH = 2
 KEY = 3
 
+class VendingException(Exception): pass
+
 class VendingMachine:
 	def __init__(self, rfh, wfh):
 		self.events = []
@@ -27,7 +30,7 @@ class VendingMachine:
 		self.wfh.write('PING\n')
 		code = ''
 		while code != '000':
-			(code, _) = self.get_response()
+			code = self.get_response()[0]
 		self.get_switches()
 
 	def await_prompt(self):
@@ -36,8 +39,11 @@ class VendingMachine:
 		prefix = ''
 		s = ''
 		while True:
-			s = self.rfh.read(1)
-			if s == '': raise Exception('nothing read!')
+			try:
+				s = self.rfh.read(1)
+			except socket.error:
+				raise VendingException('failed to read input from vending machine')
+			if s == '': raise VendingException('nothing read!')
 			if s == '\n' or s == '\r':
 				state = 1
 				prefix = ''
@@ -56,7 +62,8 @@ class VendingMachine:
 			s = ''
 			while s == '':
 				s = self.rfh.readline()
-				if s == '': return None
+				if s == '':
+					raise VendingException('Input socket has closed!')
 				s = s.strip('\r\n')
 			code = s[0:3]
 			text = s[4:]
@@ -89,7 +96,7 @@ class VendingMachine:
 		elif code[0] == '2':
 			self.events.append((KEY, int(code[1:3])))
 		else:
-			sys.stderr.write('WARNING: Unhandled event! (%s %s)\n'%(code,text))
+			logging.warning('Unhandled event! (%s %s)\n'%(code,text))
 
 	def authed_message(self, message):
 		if self.challenge == None: