【下载文档: 基于python3实现socket文件传输和校验.txt 】
基于python3实现socket文件传输和校验
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中文源码网。
