5462l2

Listing 2. rlclient

#!/usr/bin/python
#
# rlclient - remote lpr client
#
# Thu Nov  8 11:06:32 PST 2001 Rory Krause
#
# Usage: rlclient
#
# Connects to local port and checks to see if there
# is an incoming print job.  If there is, the data
# is written to a temporary file and then sent to
# lpr.

from socket import *
from time import ctime, time
import os, signal, tempfile, sys

def handler(signum, frame):
    print "Polling for print jobs.  " + ctime(time())
    try:
        # Create a TCP socket
        s = socket(AF_INET, SOCK_STREAM)
        # Bind to port 8888
        # NOTE: this port is hard coded.
        #   You may want to change this.
        s.connect(("localhost", 8888))
    except:
        typ,val = sys.exc_info()[:2]
        typname = str(type)
        valname = str(val)
        print "Could not connect: " + valname
        #print "typname: " + typname
        #print "valname: " + valname
    else:
        if s:
            print "socket exists"
            data = s.recv(1024)      # Receive data
            if data:
                filename = tempfile.mktemp()
                print filename
                f = open(filename, "w")
                f.write(data)
                f.flush()
		# Get the rest of the data
                while 1:
		    # Receive a chunk of data
                    data = s.recv(1024)
		    # If there is no more data
                    if not data:
			# then we are done
                        break
                    # For debuging
                    print data
	            # Write out to temp file
                    f.write(data)
	            # Please remember to flush
                    f.flush()
                # Close the temp file
                f.close()
                # Time to print this junk
                print "Sending to lpr"
                os.system("lpr " + filename)
            else:
                print "no data"
		# Close socket connection
                s.close

signal.signal(signal.SIGALRM, handler)
while 1:
    signal.alarm(5)
    signal.pause()