From: Bernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Date: Fri, 25 Jun 2004 14:23:08 +0000 (+0000)
Subject: Initial stuff
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=891e6406bd0428b82706bbbcc5d71ffc1463b18f;p=zanchey%2Fdispense2.git

Initial stuff
---

diff --git a/sql-edition/servers/LATClient.py b/sql-edition/servers/LATClient.py
new file mode 100644
index 0000000..4b2a1d9
--- /dev/null
+++ b/sql-edition/servers/LATClient.py
@@ -0,0 +1,54 @@
+from socket import *
+
+LATCP_SOCKET = '/var/run/latlogin'
+
+LAT_VERSION = '1.21'
+LATCP_CMD_VERSION = 8
+LATCP_CMD_TERMINALSESSION = 26
+LATCP_CMD_ERRORMSG = 99
+
+class LATClient:
+	def __init__(self, service = None, node = None, port = None, \
+			localport = None, password = None, is_queued = False):
+		self.sock = socket(AF_UNIX, SOCK_STREAM, 0);
+		self.sock.connect(LATCP_SOCKET)
+		self.send_msg(LATCP_CMD_VERSION, LAT_VERSION+'\000')
+		(cmd, msg) = self.read_reply()
+		if service == None: service = ''
+		if node == None: node = ''
+		if port == None: port = ''
+		if localport == None: localport = ''
+		if password == None: password = ''
+		if is_queued == True:
+			is_queued = 1
+		else:
+			is_queued = 0
+		self.send_msg(LATCP_CMD_TERMINALSESSION, '%c%c%s%c%s%c%s%c%s%c%s' % \
+			(is_queued,
+			 len(service), service,
+			 len(node), node,
+			 len(port), port,
+			 len(localport), localport,
+			 len(password), password
+			 ))
+		(cmd, msg) = self.read_reply()
+		if cmd == LATCP_CMD_ERRORMSG:
+			raise Exception
+
+	def send_msg(self, cmd, msg):
+		self.sock.send('%c%c%c%s'%(cmd, len(msg)/256, len(msg)%256, msg))
+
+	def read_reply(self):
+		head = self.sock.recv(3)
+		if len(head) != 3:
+			sys.stderr.write('Error: Short LAT packet\n')
+			return None
+		cmd = head[0]
+		length = ord(head[1])*256 + ord(head[2])
+		msg = self.sock.recv(length)
+		if cmd == LATCP_CMD_ERRORMSG:
+			sys.stderr.write('Error: Received LAT error: %s\n'%msg)
+		return (cmd, msg)
+	
+	def get_fh(self):
+		return (self.sock.makefile('r'), self.sock.makefile('w'))
diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py
new file mode 100755
index 0000000..57a2682
--- /dev/null
+++ b/sql-edition/servers/VendServer.py
@@ -0,0 +1,44 @@
+#!/usr/bin/python
+
+import sys, os, string, socket, time
+from popen2 import popen2
+from pyPgSQL import PgSQL
+from LATClient import LATClient
+
+class VendingMachine:
+	def __init__(self, rfh, wfh):
+		self.rfh = rfh
+		self.wfh = wfh
+		self.wfh.write('\n')
+		self.await_prompt()
+
+	def await_prompt(self):
+		self.wfh.flush()
+		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
+
+	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
+
+	def ping(self):
+		self.wfh.write('PING\n')
+		return self.get_response()
+
+if __name__ == '__main__':
+	# Open vending machine via LAT
+	latclient = LATClient(service = 'VEND', password = 'dmscptd')
+	(rfh, wfh) = latclient.get_fh()
+	v = VendingMachine(rfh, wfh)
+	print v.ping()