Hi there, i've faced some issue about code that i get from some python book, i've just modified a little of that code :,
#multichat-multicast chat & whiteboard APP
from Tkinter import *
from socket import *
import cPickle, threading, sys
#each message is command + data
CMD_JOINED, CMD_LEFT, CMD_MSG, CMD_LINE, CMD_JOINRESP = range(5)
people = {} #key = (ipaddr.port), value = (name, color)
def sendMsg(msg):
sendSock.send(msg, 0)
def onQuit():
'User clicked quit Button'
sendMsg(chr(CMD_LEFT)) #Notify others that i'm leaving
root.quit()
def onMove(e):
'Called when LButton is down and mouse moves'
global lastLine, mx, my
canvas.delete(lastLine) #delete temp line
mx, my = e.x.e.y
#draw a new temp line
lastLine = canvas.create_line(dx, dy, mx, my, width = 2, fill="Black")
def onBDown(e):
'User pressed left mouse button'
global lastLine, dx, dy, mx, my
canvas.bind('<motion>', onMove) #start receiving some messages
dx, dy = e.x.e.y
mx, my = e.x.e.y
#draw a temporarily line
lastline = canvas.create_line(dx, dy, mx, my, width = 2, fill = "Black")
def onBUp(e):
'User released left mouse button'
canvas.delete(lastLine) #erase temporary line
canvas.unbind('<motion>') #no more move msgs. delete it
#send out the draw-a - line command
sendMsg(chr(CMD_LINE) + cPickle.dumps((dx, dy, e.x.e.y), 1))
def onEnter(foo):
'User hit the [enter] key'
sendMsg(chr(CMD_MSG)+entry.get())
entry.delete(0, END) #clear the entry widget
def setup(root):
'Creates the UI'
global msgs, entry, canvas
#the big window holding everybody messages
msgs = Text(root, width=60, height=20)
msgs.grid(row=0, col = 0, columnspan = 3)
#hookup the scrool bar to see oldmessage
s = Scrollbar(root, orient = VERTICAL)
s.config (command=msgs.yview)
msgs.config(yscrollcommand=s.set)
s.grid(row=0, col=3, sticky=N+S)
#where you type your message
entry = Entry(root)
entry.grid(row=1, col=0, columnspan=2, sticky=W+E)
entry.bind('<return>', onEnter)
entry.focus_set()
b = Button(root, text = 'Quit', command=onQuit)
b.grid(row = 1, col= 2)
#a place to draw
canvas = Canvas(root, bg="white")
canvas.grid(row = 0, col = 5)
#notify me of button press and release the message
canvas.bind('<ButtonPress-1>', onBDown)
canvas.bind('<ButtonRelease-1>', onBUp)
def msgThread(add, port, name):
'Listens for and process messages'
#create a listen socket
s = socket(AF_INET, SOCK_DGRAM)
s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
s.bind((" ", port))
#join the multicast group
s.setsockopt(SOL_IP, IP_ADD_MEMBERSHIP, inet_aton(addr)+inet_aton(''))
while 1:
#get a msg and strip of the command byte
msg.msgFrom = s.recvfrom(2048)
cmd, msg = ord(msg[0]), msg[1:]
if cmd == CMD_JOINED: #new joine
msgs.insert(END, '(%s joined the chat)\n' % msg)
#introduce myself
sendMsg(chr(CMD_JOINRESP) + cPickle.dumps((name, myColor), 1))
elif cmd == CMD_LEFT: #somebody left
who = people[msgFrom][0]
if who == name: #left, better quit
break
msgs.insert(END, '(%s left the chat)\n' % who, 'color_'+who)
elif cmd == CMD_MSG: #new message to display
who == people[msgFrom][0]
msgs.insert(END, who, 'color_%s' % who)
msgs.insert(END, ': %s\n' % msg)
elif cmd == CMD_LINE: # draw a line
dx, dy, ex, ey = cPickle.loads(msg)
canvas.create_line(dx, dy, ex, ey, width=2, fill = people[msgFrom][1])
elif cmd == CMD_JOINRESP: #introducing themselves
people[msgFrom] = cPickle.loads(msg)
who.color = people[msgFrom]
#create tag to draw text in their color
msgs.tag_configure('color_' + who, foreground=color)
#leave the multicast group
s.setsockopt(SOL_IP, IP_DROP_MEMBERSHIP, inet_aton(addr)+inet_aton(''))
if __name__ == '__main__':
argv = sys.argv[0]
if len(argv) < 3:
print 'Usage: ', argv[0], '<name> <color> [addr=<multicast address>] [port=<port>]'
sys.exit(1)
global name, addr, port, myColor
addr = '192.168.0.67' #default for ip address
port = '54321' #default port
name, myColor = argv[1:3]
for arg in argv[3:]:
if arg.startswith('addr= '):
addr = arg[len('addr= '):]
elif arg.startswith('port= '):
port = int(arg[len('port= '):])
#start up a thread to process messages
threading.Thread(target=msgThread, args=(addr, port, name)).start()
#this is the socket over which w send the messages through
global sendSock
sendSock = socket(AF_INET, SOCK_DGRAM)
sendSock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
sendSock.connect((addr, port))
#don't let the packet die too soon
sendSock.setsockopt(SOL_IP, IP_MULTICAST_TTL, 2)
#create a TK window and create the GUI
root = Tk()
root.title('%s chatting on channel %s:%d' % (name, addr, port))
setup(root)
#join the chat
sendMsg(chr(CMD_JOINED) + name)
root.mainloop()
What i need to make sure is, is it true the issue is just on the port that need use integer than string , but sorry i've forgot how to that on some function
need assistance please, but i'm very curious about the module on python cause, for my personal opinion python very useful cause the plenty of the module that
help me make every tools what i need but how about if there's some error on the module itself, is there any way to help or i must call the creator of that module first
.
