python：socket传输大文件示例

文件可以传输，但是对比传输前后的文件：socket_test.txt，末尾有一些不一致服务端代码：

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
reload(sys)
sys.setdefaultencoding("utf-8")
import time
'''
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
      filename = filename.strip('\00')
      fp = open(filename, 'wb') # 新建文件，并且准备写入
      restsize = filesize
      print "recving..."
      while 1:
        if restsize > 102400: # 如果剩余数据包大于1024，就去1024的数据包
          filedata = newsock.recv(10240)
        else:
          filedata = newsock.recv(restsize)
          fp.write(filedata)
          #break
        if not filedata:
          break
        fp.write(filedata)
        restsize = restsize - len(filedata) # 计算剩余数据包大小
        if restsize <= 0:
          break
      fp.close()
      print "recv succeeded !!File named:", filename
    except Exception, e:
      print unicode(e).encode('gbk')
      print "the socket partner maybe closed"
      newsock.close()
      break
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 创建tcp连接
sock.bind(('10.240.146.82', 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'

客户端代码：

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
reload(sys)
sys.setdefaultencoding("utf-8")
'''
输入文件名，并且上传
'''
import socket
import time
import struct
import os
f = open('socket_test.txt', 'wb')

for i in range(1000000):
  f.write('for socket test, the line number is : ' + str(i) + '\n')

f.close()

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(50)
e = 0
try:
  sock.connect(('10.240.146.82', 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
  filename = 'socket_test.txt'
  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')
  fp2 = open('local_test.txt','wb')
  i = 0
  while 1: # 发送文件
    filedata = fp.read(10240)
    if not filedata:
      break
    sock.sendall(filedata)
    fp2.write(filedata)
    print i
    i = i + 1
  print "sending over..."
  fp.close()
  fp2.close()

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