Python 聊天客户端-服务器修改出现严重错误
作为练习,我寻找了一个简单的 Python 聊天客户端-服务器系统来修改和使用。我在系统中发现的第一个主要缺陷是它使用单个 TCP 连接来进行服务器和客户端的通信。第二个是只能让两个人(一个使用客户端,另一个使用服务器)进行通信。第三,连续发帖是不可能的。一个人发了一条消息,然后必须等待另一个人发一条消息才能再次交谈。非常非常有限。
所以我开始对它进行线程化并尝试使用套接字。客户端连接到服务器一次,提供其 IP 地址,创建侦听线程,然后重新连接到服务器的消息接收器。 所有帖子都会发送到该接收者,该接收者会遍历已连接客户端的列表并连接到每个客户端并发送消息(开头带有发送者的姓名;杂项功能)。 (我知道像这样经常打开一个新连接效率很低,但我想保持 tcp 连接直到它工作,然后转到 UDP)
然而,奇怪的垃圾开始发生。我只想说我做了错误 91 的噩梦。
有人能确定如何使此代码在此结构和功能集中可操作吗? (Python 版本 2.6 是的;忽略只是占位符的无限循环)
服务器代码:
from socket import *
from time import time, ctime
import Queue, threading
IP = ''
PORT = 5000
PORTPlus = 2
PORTRec = 1000
ADS = (IP, PORT)
namelist = []
clientlist = []
class clientRec(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
print "I'm this far:", (IP, (PORT + PORTRec))
self.receiver = socket(AF_INET, SOCK_STREAM)
self.receiver.bind((IP, PORT + PORTRec))
self.sender = socket(AF_INET, SOCK_STREAM)
def run(self):
global clientlist, namelist
self.receiver.listen(10)
connected = True
while connected:
tcpcli, addr = receiver.accept()
message = tcpcli.recv(1024) # Accept clien't IP for home-dialing
for i in range(clientlist.__len__()): # For each connected client
try:
sender.connect(clientlist(i)) # connect
sender.send(namelist[i] + message) # and deliver message with sender's name
sender.close()
except:
del clientlist[i], namelist[i]
print "ADS:", (IP, 5000)
handle = clientRec()
tcpsoc = socket(AF_INET, SOCK_STREAM) # Paperwork
tcpsoc.bind(ADS) # Bind self to port
tcpsoc.listen(5) # Listen on that port0
handle.start() # Start thread
# Main
while 1:
print "Waiting for connection"
tcpcli, addr = tcpsoc.accept() # Accept unknown client
print "Connection received; handling..."
namelist.append(tcpcli.recv(1024)) # Accept client's name
client_IP = tcpcli.recv(1024) # Accept clien't IP for home-dialing
client_port = int(tcpcli.recv(1024))# Accept clien't listening port
port_assign = PORT + PORTRec
tcpcli.send(str(port_assign)) # Tell the client that port
tcpcli.close() # Close client connection
clientlist.append((client_IP, client_port))# Add client to send-list
print "Handled."
tcpsoc.close()
客户端代码:
#!/usr/bin/env python
from socket import *
import threading, cgi, os
IP = ''
PORT = 5000
PORTmy = 100
ADS = (IP, PORT)
class iListen(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.receiver = socket(AF_INET, SOCK_STREAM)# Paperwork
self.receiver.bind(('', PORT + PORTmy)) # Listen on that port
self.receiver.listen(5) # Listen for posts
def run(self):
while listening:
tcpcli, addr = receiver.accept() # Accept unknown client
message = tcpcli.recv(1024)
if message == "/q":
listening = False
tcpcli.close()
# Initial CONNECT
myname = raw_input("Tell me yer name partnah: ")
tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.connect(ADS) # First Connect
tcpsoc.send(myname) # Declare name
tcpsoc.send(gethostbyname(gethostname()))# Give IP address
tcpsoc.send(str(PORT + PORTmy)) # Give listening port
ADS = (IP, int(tcpsoc.recv(1024))) # Get new connect details
tcpsoc.close() # Close old connection
listen = iListen() # Create listener thread
listen.start() # Start listening
# RECONNECT
print ADS
tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.connect(ADS) # reconnect to new port
connected = True
# Main Chat-loop
while connected:
mes = raw_input(">>>")
tcpsoc.send(mes)
if mes == "/q":
tcpsoc.close()
connected = False
time.sleep(4)
sys.exit()
As an exercise, I looked for a simple Python chat client-server system to modify and toy with. The first major failing I found in the system was that it used a single tcp connection for the server and client to communicate. The second was that you could only have two people (one using the client, and the other using the server) communicate. Thirdly, consecutive posts were impossible. One person sent a message, then had to wait for the other person to send a single message before talking again. Very, very limiting.
So I began threading it and experimenting with the sockets. Clients connect to the server once, give their IP addresses, create a listening thread, and then reconnect to the server's message receiver.
All posts are sent to that receiver, which iterates through a list of connected clients and connects to each of them and sends the message (with the sender's name in the beginning; misc feature).
(I know that opening a new connection so often like that is inefficient, but I wanted to keep with tcp connections until I had it working, and THEN go to UDP)
However, weird crap began happening. Suffice it to say that I have nightmares of Error 91.
Could anyone identify how to render this code operable within this structure and feature-set?
(Python version 2.6 yey; ignore the infinite loop that is just a placeholder)
SERVER CODE:
from socket import *
from time import time, ctime
import Queue, threading
IP = ''
PORT = 5000
PORTPlus = 2
PORTRec = 1000
ADS = (IP, PORT)
namelist = []
clientlist = []
class clientRec(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
print "I'm this far:", (IP, (PORT + PORTRec))
self.receiver = socket(AF_INET, SOCK_STREAM)
self.receiver.bind((IP, PORT + PORTRec))
self.sender = socket(AF_INET, SOCK_STREAM)
def run(self):
global clientlist, namelist
self.receiver.listen(10)
connected = True
while connected:
tcpcli, addr = receiver.accept()
message = tcpcli.recv(1024) # Accept clien't IP for home-dialing
for i in range(clientlist.__len__()): # For each connected client
try:
sender.connect(clientlist(i)) # connect
sender.send(namelist[i] + message) # and deliver message with sender's name
sender.close()
except:
del clientlist[i], namelist[i]
print "ADS:", (IP, 5000)
handle = clientRec()
tcpsoc = socket(AF_INET, SOCK_STREAM) # Paperwork
tcpsoc.bind(ADS) # Bind self to port
tcpsoc.listen(5) # Listen on that port0
handle.start() # Start thread
# Main
while 1:
print "Waiting for connection"
tcpcli, addr = tcpsoc.accept() # Accept unknown client
print "Connection received; handling..."
namelist.append(tcpcli.recv(1024)) # Accept client's name
client_IP = tcpcli.recv(1024) # Accept clien't IP for home-dialing
client_port = int(tcpcli.recv(1024))# Accept clien't listening port
port_assign = PORT + PORTRec
tcpcli.send(str(port_assign)) # Tell the client that port
tcpcli.close() # Close client connection
clientlist.append((client_IP, client_port))# Add client to send-list
print "Handled."
tcpsoc.close()
CLIENT CODE:
#!/usr/bin/env python
from socket import *
import threading, cgi, os
IP = ''
PORT = 5000
PORTmy = 100
ADS = (IP, PORT)
class iListen(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.receiver = socket(AF_INET, SOCK_STREAM)# Paperwork
self.receiver.bind(('', PORT + PORTmy)) # Listen on that port
self.receiver.listen(5) # Listen for posts
def run(self):
while listening:
tcpcli, addr = receiver.accept() # Accept unknown client
message = tcpcli.recv(1024)
if message == "/q":
listening = False
tcpcli.close()
# Initial CONNECT
myname = raw_input("Tell me yer name partnah: ")
tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.connect(ADS) # First Connect
tcpsoc.send(myname) # Declare name
tcpsoc.send(gethostbyname(gethostname()))# Give IP address
tcpsoc.send(str(PORT + PORTmy)) # Give listening port
ADS = (IP, int(tcpsoc.recv(1024))) # Get new connect details
tcpsoc.close() # Close old connection
listen = iListen() # Create listener thread
listen.start() # Start listening
# RECONNECT
print ADS
tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.connect(ADS) # reconnect to new port
connected = True
# Main Chat-loop
while connected:
mes = raw_input(">>>")
tcpsoc.send(mes)
if mes == "/q":
tcpsoc.close()
connected = False
time.sleep(4)
sys.exit()
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我正在做很多类似的事情,但我将实现文本加密。我看到您正在起诉客户列表的列表...但我想说有更好的方法可以做到这一点。我正在使用字典。
如果您熟悉字典,请跳过下一段。
字典基本上可以处理 2 个变量,并使用 {} 进行定义。
因此,使用它,您可以制作一个像 {'username':'ipaddr'} 这样的字典,这样您就可以将用户名和 ips 都放在一个变量中。如果您想要像我一样的最终产品,那么服务器所做的就是重复消息,并将其发送给每个连接的人。那么服务器就可以循环访问用户名。
另请注意,我认为 tcpsoc.listen(5) 是一次可以连接多少人......我想这就是我在某处读到的内容。
我不知道为什么你会遇到这个错误,但是如果你想看看我的半成品代码,我们也非常欢迎你。 (忽略导入随机,这个还没有使用,但将成为加密系统的一部分)
http://piratepad.net/ PwQzdU0bkk
I am working on something alot like this, but I am instead going to implement text encryption. I see you are suing lists for the client list... but I would say there is a better way of doing that. I am using a dictionary.
if you are familiar with dictionaries, skip the next paragraph.
Dicionaries can handle basicly 2 variables, and are defined using the {}.
so using this, you can can make a dictionary like {'username':'ipaddr'} this way you can make it so that both usernames and ips are all in one variable. If you want the end product like me, you will be making it so all the server does is repeat the message, and send it to everyone who is connected. then the server can just cycle through the usernames.
as another note, I think the tcpsoc.listen(5) is how many people can beconnected at once... I think thats what i read somewhere.
I have no idea why you would be having that error, but if you want to look at my halfway constucted code, you are more than welcome too. (ignore the import random, this is not yet used, but will be part of the encryption system)
http://piratepad.net/PwQzdU0bkk