5462l1.txt0100764000204600003300000000253007403001224011427 0ustar jillljedit5462l1 Listing 1. rlserver #!/usr/bin/python # # rlserver - remote lpr server # # Thu Nov 8 11:06:32 PST 2001 Rory Krause # # Usage: rlserver portnumber # # Gets "printjob" data from standard in and fires # up a server on port ARG 1. The server waits for # a connection and then passes on the data to the # connecting client program. from socket import * from os import remove import sys, tempfile data = sys.stdin.read() filename = tempfile.mktemp() f = open(filename, "w") f.write(data) f.close() # Close file to make sure all # buffered data has been written port = int(sys.argv[1]) # read port number from argv s = socket(AF_INET, SOCK_STREAM)# Create TCP socket s.bind(("",port)) # Bind to port s.listen(1) # Listen, but allow # only 1 connection print "Listening on port: " + str(port) client,addr = s.accept() # Accept a connection print "Got a connection from ",addr z = open(filename, "r") while 1: bunch = z.read(512) if bunch: sent = client.send(bunch) print len(bunch) z.seek(sent-len(bunch),1) else: z.close() # Close temp file break # Let's get out of # this while loop client.close() # Close client # connection s.close() # Close the socket 5462l2.txt0100764000204600003300000000401607403001224011431 0ustar jillljedit5462l2 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() 5462l3.txt0100764000204600003300000000130707403001224011432 0ustar jillljedit5462l3 Listing 3. time.client.py #!/usr/bin/python # # time.client.py - gets the time from a time server. # # Thu Nov 8 14:10:49 PST 2001 Rory Krause # # Usage: ./time.client.py portnumber # # Simple time client that takes first argument # as a port number, connects to that port and # prints the time to standard out. Use with # time.server.py. # from socket import * import sys port = int(sys.argv[1]) # Get port number s = socket(AF_INET, SOCK_STREAM) # Create TCP socket s.connect(("localhost", port)) # Connect to port data = s.recv(1024) # Receive up to # 1024 bytes s.close() # Close connection print "The time is ", data # Print time 5462l4.txt0100764000204600003300000000144707403001224011440 0ustar jillljedit5462l4 Listing 4. time.server.py #!/usr/bin/python # # time.server.py - provides a time service. # # Thu Nov 8 14:10:49 PST 2001 Rory Krause # # Usage: ./time.server.py portnumber # # Simple time server that takes first argument # as a port number, listens for connections and # sends out the time. Use with time.client.py. # from socket import * import time, sys port = int(sys.argv[1]) # Get port number s = socket(AF_INET,SOCK_STREAM) # Create TCP socket s.bind(("",port)) # Bind to port s.listen(1) # Listen, but allow # only 1 connection while 1: client,addr = s.accept() #Get a connection print "Got a connection from ",addr # Send time to client client.send(time.ctime(time.time())) client.close()