【发布时间】:2014-10-17 14:09:43
【问题描述】:
我几乎是 Python Socket 编程的初学者。我做了一个聊天服务器,但它不能正常工作。
它可以正常接收数据,但不能用于发送数据。当我使用“conn.send()”时,客户端永远不会收到消息。请帮帮我。
This is my code for the socket server:
'''
Simple socket server using threads
'''
import socket
import sys
from _thread import *
HOST = '' # Symbolic name meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print ( 'Socket created on Port: '+str(PORT))
#Bind socket to local host and port
try:
s.bind((HOST, PORT))
except socket.error as msg:
print ( 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
sys.exit()
print ( 'Socket bind complete')
#Start listening on socket
s.listen(10)
print ( 'Socket now listening')
connectmsg = 'Welcome to OmniBean\'s Chat server!'
#Function for handling connections. This will be used to create threads
def clientthread(conn):
#Sending message to connected client
print('Sending Welcome Message...')
#print(conn)
conn.send(str.encode(connectmsg)) #send only takes string ENCODED!
#infinite loop so that function do not terminate and thread do not end.
while True:
#Receiving from client
data = bytes.decode(conn.recv(1024))
print (data)
reply = 'OK...' + data
if not data:
break
conn.sendall(str.encode(reply))
#came out of loop
conn.close()
#now keep talking with the client
while 1:
#wait to accept a connection - blocking call
conn, addr = s.accept()
print ( 'Connected with ' + addr[0] + ':' + str(addr[1]))
conn.send(str.encode(connectmsg))
#start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
start_new_thread(clientthread ,(conn,))
s.close()
如果你能弄清楚这是为什么,那么你能告诉我吗?我的客户代码在这里: 我的客户正在使用来自OmniBean 的SimpleNet Library
import os
from simplenet import *
myname = input ('Enter a login name: ')
host = input('Enter Host Name: ')
port = input('Enter Host Port: ')
connect(host,port)
welcome = receive()
input('Received Message: '+welcome)
while True:
os.system('cls')
#room = receive()
#print (room)
msg = input('Enter a message to send to server: ')
send(myname+': '+msg)
理论上,由于我从服务器发送了两次数据,客户端应该收到数据;但是,客户端只是永远等待来自服务器的消息,而该消息永远不会到来。请帮我解决这个问题。
【问题讨论】:
-
_thread和from _thread import *是什么? -
我将
_thread替换为thread并以telnet localhost 8888作为客户端运行它。它给了我你好消息。我输入字符串后python程序报错:File "chat.py", line 42, in clientthread conn.sendall(str.encode(reply)) TypeError: descriptor 'encode' requires a 'str' object but received a 'unicode' -
该问题当前不是客户端/服务器问题。问题在于
str.encode -
_thread 是 Python 2 中线程的 Python 3 版本。我使用的是 Python 3.3。我也没有收到您所说的错误消息;但是它显然没有出现在我的机器上,一台装有 Python 3.3 的 Windows 8 PC。
标签: python multithreading sockets