python socket上传文件的服务端和客户端实现

#coding=gbk
'''
等待连接
等待发送文件
读取数据
写入文件并且保存
等待连接
'''
import socket
import threading
import time
import struct
def function(newsock, address):
    FILEINFO_SIZE = struct.calcsize('128sI')
    '''定义文件信息（包含文件名和文件大小）大小。128s代表128个char[]（文件名），I代表一个integer or long（文件大小）'''
    while 1:     
        try:
            fhead = newsock.recv(FILEINFO_SIZE)
            filename, filesize = struct.unpack('128sI', fhead)
            '''把接收到的数据库进行解包，按照打包规则128sI'''
            print "address is: ",address
            print filename, len(filename),type(filename)
            print filesize
            filename = 'new_'+filename.strip('\00')#命名新文件new_传送的文件
            fp = open(filename,'wb')#新建文件，并且准备写入
            restsize = filesize
            print "recving..."
            while 1:
                if restsize > 1024:#如果剩余数据包大于1024，就去1024的数据包
                    filedata = newsock.recv(1024)
                else:
                    filedata = newsock.recv(restsize)
                    fp.write(filedata)
                    break
                if not filedata:
                    break
                fp.write(filedata)
                restsize = testsize - len(filedata)#计算剩余数据包大小
                if restsize <= 0:
                    break
            fp.close()
            print "recv succeeded !!File named:",filename
        except:
            print "he socket partner maybe closed"
            newsock.close()
            break
sock=socket.socket(socket.AF_INET, socket.SOCK_STREAM)#创建tcp连接
sock.bind(('127.0.0.1',8887))#定于端口和ip
sock.listen(5)#监听
while True:
    newsock, address = sock.accept()
    print "accept another connection"
    tmpThread = threading.Thread(target=function,args=(newsock,address)) #如果接收到文件，创建线程
    tmpThread.start()#执行线程
print 'end'

#coding=gbk
'''
输入文件名，并且上传
'''
import socket
import time
import struct
import os
sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.settimeout(1)
e=0
try:
    sock.connect(('127.0.0.1',8887))
    print 'connect...'
except socket.timeout,e:
    print 'timeout',e
except socket.error,e:
    print 'error',e
except e:
    print 'any',e
if not e:
    while (1):
        filename = raw_input('input your filename------->')#输入文件名
        FILEINFO_SIZE = struct.calcsize('128sI')#编码格式大小
        fhead = struct.pack('128sI',filename,os.stat(filename).st_size)#按照规则进行打包
        sock.send(fhead)#发送文件基本信息数据
        fp = open(filename,'rb')
        while 1:        #发送文件
            filedata = fp.read(1024)
            if not filedata:
                break
            sock.send(filedata)
        print "sending over..."
        fp.close()