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chat_client.py
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chat_client.py
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#coding:utf8
import cmd, socket, traceback, threading, time
import sys
class ChatClient(cmd.Cmd):
''' chat client '''
def __init__(self, host='localhost', port=10001):
cmd.Cmd.__init__(self)
self.host = host
self.port = port
self.sock = ''
self.prompt = 'chatClient>'
self.completekey='\n'
self.name = ''
def do_connect(self, line):#连接到server
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.connect((self.host, self.port))
s.settimeout(0.1)#设置超时时间 0.1 秒
print 'you are connected, and you can input your name, example: name Vincent'
self.sock = s
def do_name(self, line):
if not self.sock:#先得连接才能执行。
print 'please connect first'
line = line.strip()
self.prompt = '%s>' % line
self.sock.send('name\t%s' % line)#发送名字
self.name = line
#print 'name', line
t = threading.Thread(target=ChatClient.continue_read, args=(self,))#启动一个子线程、
t.setDaemon(True)#守护线程在子线程没有执行完的时候程序不会被退出
t.start()
'''
个人理解:
setDaemon(True)将线程声明为守护线程,必须在start() 方法调用之前设置,如果不设置为守护线程程序会被无限挂起。
The entire Python program exits when no alive non-daemon threads are left
上面这句话的意思是:当没有存活的非守护进程时,整个python程序才会退出。
也就是说:如果主线程执行完以后,还有其他非守护线程,主线程是不会退出的
,会被无限挂起;必须将线程声明为守护线程之后,如果队列中的数据运行完了,那么整个程序想什么时候退出就退出,不用等待。
'''
def do_msg(self, line):
if not line:
print 'input error, msg is empty, check it and reinput'
if line:
self.sock.send('msg\t%s' % line)
def do_show(self, line):
if not self.name:
print 'please set your name first'
self.sock.send('show\ttmp')#发送show 和tmp
#print 'show'
def do_pm(self, line):
if not line:
print 'input error, msg is empty, check it and reinput'
if line:
self.sock.send('pm\t%s' % line)
@staticmethod#不用self 无法访问成员变量 且可以直接调用不用加参数
def continue_read(chatclient):#接收返回的消息并且打印出来
while 1:
try:
msg = chatclient.sock.recv(1024) #新建对象
if msg:
print msg
sys.stdout.write(chatclient.prompt)
sys.stdout.flush()
else:
break
except socket.timeout:
pass
except:
traceback.print_exc()
time.sleep(1)
print 'exit thread', threading.currentThread().getName()#查看当前的线程名称
def do_EOF(self, line):#退出
if self.sock:
self.sock.close()
return True
if __name__=='__main__':
info='''
help:
1.connect --- 连接到服务器
2.name [vincent] --- 用昵称登陆
3.show --- 查看当前连接人数
4.msg [message] --- 群发消息
5.pm [vincent] [message] --- 发送给某人
'''
print info
ChatClient().cmdloop()