python socket报错

传输小文件没有问题，大文件（500M）报错：socket.error: [Errno 10053]

服务端：

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
reloadsys
sys.setdefaultencoding"utf-8"

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 functionnewsock, address:
    FILEINFO_SIZE = struct.calcsize128sI
    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.recvFILEINFO_SIZE
            filename, filesize = struct.unpack128sI, 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, lenfilename, typefilename
            print filesize
            #filename = new_+filename.strip\00  # 命名新文件new_传送的文件
            filename = filename.strip\00
            fp = openfilename, 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.recv1024
                else:
                    filedata = newsock.recvrestsize
                    fp.writefiledata
                    break
                if not filedata:
                    break
                fp.writefiledata
                restsize = testsize - lenfiledata  # 计算剩余数据包大小
                if restsize <= 0:
                    break
            fp.close
            print "recv succeeded !!File named:", filename
        except:
            print "the socket partner maybe closed"
            newsock.close
            break
sock = socket.socketsocket.AF_INET, socket.SOCK_STREAM  # 创建tcp连接
sock.bind127.0.0.1, 8887  # 定于端口和ip
sock.listen5  # 监听
while True:
    newsock, address = sock.accept
    print "accept another connection"
    tmpThread = threading.Threadtarget=function, args=newsock, address  # 如果接收到文件，创建线程
    tmpThread.start  # 执行线程
print end

客户端：

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
reloadsys
sys.setdefaultencoding"utf-8"

输入文件名，并且上传

import socket
import time
import struct
import os
sock = socket.socketsocket.AF_INET, socket.SOCK_STREAM
sock.settimeout500
e = 0
try:
    sock.connect127.0.0.1, 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_inputinput your filename------->  # 输入文件名
        FILEINFO_SIZE = struct.calcsize128sI  # 编码格式大小
        fhead = struct.pack128sI, filename, os.statfilename.st_size  # 按照规则进行打包
        sock.sendfhead  # 发送文件基本信息数据
        fp = openfilename, rb
        while 1:  # 发送文件
            filedata = fp.read1024
            if not filedata:
                break
            sock.sendfiledata
        print "sending over..."
        fp.close