欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

基于python3实现socket文件传输和校验

程序员文章站 2023-10-30 16:14:10
基于socket的文件传输并进行MD5值校验,供大家参考,具体内容如下 文件传输分为两个类,一个是服务端,一个是客户端。 客户端发起发送文件或接收文件的请求,服务端收到...

基于socket的文件传输并进行MD5值校验,供大家参考,具体内容如下

文件传输分为两个类,一个是服务端,一个是客户端。

客户端发起发送文件或接收文件的请求,服务端收到请求后接收或发送文件,最后进行MD5值的校验

socket数据通过struct模块打包

需要发送文件到服务端时,调用sendFile函数,struct包内包含文件信息、文件大小、文件MD5等信息,服务端接收到文件后进行MD5值校验,校验成功后则返回成功

需要从服务器下载文件时,调用recvFile函数,收到文件后进行MD5校验

client类代码如下

import socket
import struct,os
import subprocess
 
dataFormat='8s32s100s100sl'
 
class fileClient():
 def __init__(self,addr):
  self.addr = addr
  self.action = ''
  self.fileName = ''
  self.md5sum = ''
  self.clientfilePath = ''
  self.serverfilePath = ''
  self.size = 0
 
 def struct_pack(self):
  ret = struct.pack(dataFormat,self.action.encode(),self.md5sum.encode(),self.clientfilePath.encode(),
       self.serverfilePath.encode(),self.size)
  return ret
 
 def struct_unpack(self,package):
  self.action,self.md5sum,self.clientfilePath,self.serverfilePath,self.size = struct.unpack(dataFormat,package)
  self.action = self.action.decode().strip('\x00')
  self.md5sum = self.md5sum.decode().strip('\x00')
  self.clientfilePath = self.clientfilePath.decode().strip('\x00')
  self.serverfilePath = self.serverfilePath.decode().strip('\x00')
 
 def sendFile(self,clientfile,serverfile):
  if not os.path.exists(clientfile):
   print('源文件/文件夹不存在')
   return "No such file or directory"
  self.action = 'upload'
  (status, output) = subprocess.getstatusoutput("md5sum " + clientfile + " | awk '{printf $1}'")
  if status == 0:
   self.md5sum = output
  else:
   return "md5sum error:"+status
  self.size = os.stat(clientfile).st_size
  self.serverfilePath = serverfile
  self.clientfilePath = clientfile
  ret = self.struct_pack()
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  try:
   s.connect(self.addr)
   s.send(ret)
   recv = s.recv(1024)
   if recv.decode() == 'dirNotExist':
    print("目标文件/文件夹不存在")
    return "No such file or directory"
   elif recv.decode() == 'ok':
    fo = open(clientfile, 'rb')
    while True:
     filedata = fo.read(1024)
     if not filedata:
      break
     s.send(filedata)
    fo.close()
    recv = s.recv(1024)
    if recv.decode() == 'ok':
     print("文件传输成功")
     s.close()
     return 0
    else:
     s.close()
     return "md5sum error:md5sum is not correct!"
  except Exception as e:
   print(e)
   return "error:"+str(e)
 
 def recvFile(self,clientfile,serverfile):
  if not os.path.isdir(clientfile):
   filePath,fileName = os.path.split(clientfile)
  else:
   filePath = clientfile
  if not os.path.exists(filePath):
   print('本地目标文件/文件夹不存在')
   return "No such file or directory"
  self.action = 'download'
  self.clientfilePath = clientfile
  self.serverfilePath = serverfile
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  try:
   s.connect(self.addr)
   ret = self.struct_pack()
   s.send(ret)
   recv = s.recv(struct.calcsize(dataFormat))
   self.struct_unpack(recv)
   if self.action.startswith("ok"):
    if os.path.isdir(clientfile):
     fileName = (os.path.split(serverfile))[1]
     clientfile = os.path.join(clientfile, fileName)
    self.recvd_size = 0
    file = open(clientfile, 'wb')
    while not self.recvd_size == self.size:
     if self.size - self.recvd_size > 1024:
      rdata = s.recv(1024)
      self.recvd_size += len(rdata)
     else:
      rdata = s.recv(self.size - self.recvd_size)
      self.recvd_size = self.size
     file.write(rdata)
    file.close()
    print('\n等待校验...')
    (status, output) = subprocess.getstatusoutput("md5sum " + clientfile + " | awk '{printf $1}'")
    if output == self.md5sum:
     print("文件传输成功")
    else:
     print("文件校验不通过")
     (status, output) = subprocess.getstatusoutput("rm " + clientfile)
   elif self.action.startswith("nofile"):
    print('远程源文件/文件夹不存在')
    return "No such file or directory"
  except Exception as e:
   print(e)
   return "error:"+str(e)

server类代码如下

import socket
import struct,os
import subprocess
import socketserver
 
dataFormat='8s32s100s100sl'
 
class fileServer(socketserver.StreamRequestHandler):
 def struct_pack(self):
  ret = struct.pack(dataFormat, self.action.encode(), self.md5sum.encode(), self.clientfilePath.encode(),
       self.serverfilePath.encode(), self.size)
  return ret
 
 def struct_unpack(self, package):
  self.action, self.md5sum, self.clientfilePath, self.serverfilePath, self.size = struct.unpack(dataFormat,
                          package)
  self.action = self.action.decode().strip('\x00')
  self.md5sum = self.md5sum.decode().strip('\x00')
  self.clientfilePath = self.clientfilePath.decode().strip('\x00')
  self.serverfilePath = self.serverfilePath.decode().strip('\x00')
 
 def handle(self):
  print('connected from:', self.client_address)
  fileinfo_size = struct.calcsize(dataFormat)
  self.buf = self.request.recv(fileinfo_size)
  if self.buf:
   self.struct_unpack(self.buf)
   print("get action:"+self.action)
   if self.action.startswith("upload"):
    try:
     if os.path.isdir(self.serverfilePath):
      fileName = (os.path.split(self.clientfilePath))[1]
      self.serverfilePath = os.path.join(self.serverfilePath, fileName)
     filePath,fileName = os.path.split(self.serverfilePath)
     if not os.path.exists(filePath):
      self.request.send(str.encode('dirNotExist'))
     else:
      self.request.send(str.encode('ok'))
      recvd_size = 0
      file = open(self.serverfilePath, 'wb')
      while not recvd_size == self.size:
       if self.size - recvd_size > 1024:
        rdata = self.request.recv(1024)
        recvd_size += len(rdata)
       else:
        rdata = self.request.recv(self.size - recvd_size)
        recvd_size = self.size
       file.write(rdata)
      file.close()
      (status, output) = subprocess.getstatusoutput("md5sum " + self.serverfilePath + " | awk '{printf $1}'")
      if output == self.md5sum:
       self.request.send(str.encode('ok'))
      else:
       self.request.send(str.encode('md5sum error'))
    except Exception as e:
     print(e)
    finally:
     self.request.close()
   elif self.action.startswith("download"):
    try:
     if os.path.exists(self.serverfilePath):
      (status, output) = subprocess.getstatusoutput("md5sum " + self.serverfilePath + " | awk '{printf $1}'")
      if status == 0:
       self.md5sum = output
      self.action = 'ok'
      self.size = os.stat(self.serverfilePath).st_size
      ret = self.struct_pack()
      self.request.send(ret)
      fo = open(self.serverfilePath, 'rb')
      while True:
       filedata = fo.read(1024)
       if not filedata:
        break
       self.request.send(filedata)
      fo.close()
     else:
      self.action = 'nofile'
      ret = self.struct_pack()
      self.request.send(ret)
    except Exception as e:
     print(e)
    finally:
     self.request.close()

调用server,并开启服务

import fileSocket
import threading
import socketserver
import time
 
serverIp = '127.0.0.1'
serverPort = 19821
serverAddr = (serverIp,serverPort)
 
class fileServerth(threading.Thread):
 def __init__(self):
  threading.Thread.__init__(self)
  self.create_time = time.time()
  self.local = threading.local()
 
 def run(self):
  print("fileServer is running...")
  fileserver.serve_forever()
 
fileserver = socketserver.ThreadingTCPServer(serverAddr, fileSocket.fileServer)
fileserverth = fileServerth()
fileserverth.start()

调用client,发送/接受文件

import fileSocket
 
serverIp = '127.0.0.1'
serverPort = 19821
serverAddr = (serverIp,serverPort)
 
fileclient = fileSocket.fileClient(serverAddr)
fileclient.sendFile('fromClientPath/file','toServerPath/file')
fileclient.recvFile('toClientPath/file','fromServerPath/file')

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。