python网络编程学习笔记（3）：socket网络服务器

import socket

solist=[x for x in dir(socket) if x.startswith('SO_')]

solist.sort()

for x in solist:

    Print x

# -*- coding: cp936 -*-
##tcp响应服务器，当与客户端建立连接后，服务器显示客户端ip和端口，同时将接收的客户端信息和'I get it!'传给客户端，此时等待输入一个新的信息传给客户端。
##@小五义 http://www.cnblogs.com/xiaowuyi
import socket,traceback
host=''
port=12345
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind((host,port))
s.listen(1)

while 1:
    try:
        clientsock,clientaddr=s.accept()
    except KeyboardInterrupt:
        raise
    except:
        traceback.print_exc()
        continue
    try:
        print "连接来自：",clientsock.getpeername()
        while 1:
            data=clientsock.recv(4096)
            if not len(data):
                break
            print clientsock.getpeername()[0]+':'+str(data)
            clientsock.sendall(data)
            clientsock.sendall("\nI get it!\n")
            t=raw_input('input the word:')
            clientsock.sendall(t)
    except (KeyboardInterrupt,SystemExit):
        raise
    except:
        traceback.print_exc()

    try:
        clientsock.close()
    except KeyboardInterrupt:
        raise
    except:
        traceback.print_exc()

# -*- coding: cp936 -*-
##tcp客户端,首先输入服务器ip地址，然后输入信息，回车后会得到服务器返回信息，然后等待服务器向其发送信息后退出。
##@小五义 http://www.cnblogs.com/xiaowuyi
import socket,sys
port=12345
host=raw_input('输入服务器ip:')
data=raw_input('输入要发送的信息：')
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
try:
    s.connect((host,port))
except:
    print '连接错误！'
s.send(data)
s.shutdown(1)
print '发送完成。'
while 1:
    buf=s.recv(4096)
    if not len(buf):
        break
    sys.stdout.write(buf)
    

# -*- coding: cp936 -*-
##UDP服务器端,客户端连接后，向其发送当前时间
##@小五义 http://www.cnblogs.com/xiaowuyi
import socket,traceback,time,struct
host=''
port=12345
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind((host,port))

while 1:
    try:
        message,address=s.recvfrom(8192)
        secs=int(time.time())
        reply=struct.pack("!I",secs)
        s.sendto(reply,address)
    except (KeyboardInterrupt,SystemExit):
        raise
    except:
        traceback.print_exc()

# -*- coding: cp936 -*-
##udp客户端,向服务器发送一个空字符后，得到服务器返回时间
##@小五义 http://www.cnblogs.com/xiaowuyi
import socket,sys,struct,time
host=raw_input('输入服务器地址：')
port=12345
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.sendto('',(host,port))
print "等待回复……"
buf=s.recvfrom(2048)[0]
if len(buf)!=4:
    print "回复错误%d:%s"%(len(buf),buf)
    sys.exit(1)
secs=struct.unpack("!I",buf)[0]
print time.ctime(int(secs))