Python使用socket实现文件传输

• 一、环境说明
• 二、代码
• 三、测试

• Centos7.6 上测试使用

思路：

• 分为server端和client端，client端发送，server端接收
• client端发送文件名，文件数据；server端接收文件名和文件数据

不足：

• 未实现加密传输
• 没有加入校验机制，需要文件传输完成后手动校验文件是否一致

1. socket_client.py

#!/usr/bin/python
# _*_ coding: UTF-8 _*_

import socket
from this import d
import time, os, base64, os.path
import argparse

def SendFile(s, filename):
    print('Sending %s' % filename)
    s.sendall('filename:%s::::' % filename)
    f = open(dirname + filename, 'rb')
    while True:
        chunk = f.read(chunksize)
        if not chunk:
            f.close()
            print('%s Successfully Sent %sn' %(time.ctime(), filename))
            break
        s.sendall(chunk)
    time.sleep(1)
    s.sendall('EOF')
    s.close()

def main(dirname, IP, Port, MB = 16):
    print('main function is start!')
    for filename in os.listdir(dirname):
        if os.path.isfile(dirname + filename):
            print filename
            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            s.connect((IP, Port))
            SendFile(s, filename)

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Manual to the script')
    parser.add_argument('-d',type=str,default='/opt/test/',help='input directory')
    parser.add_argument('--host',type=str,required=True,help='input connecting host's ip')
    parser.add_argument('-p',type=int,required=True,help='input host port')
    args = parser.parse_args()
    dirname = args.d
    IP = args.host
    Port = args.p
    MB = 16
    chunksize = int(MB*1024*1024)
    main(dirname, IP, Port, MB)

2. socket_server.py

#!/usr/bin/python
# _*_ coding: UTF-8 _*_

import socket, time, os, base64, re
import argparse

def main(IP, Port, log):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind((IP, Port))
    s.listen(12)
    print 'Listened on ', IP, Port
    reg = re.compile('filename:(.*?)::::')

    while True:
        conn, addr = s.accept()
        print(time.ctime(), 'Connected from ', addr)
        recvd = conn.recv(1024)
        if  recvd:
            ss = reg.findall(recvd)
            filename = ss[0]
            f = open(filename, 'wb')
            while True:
                data = conn.recv(1024)
                if not data:
                    break
                if data == 'EOF':
                    f.close()
                    log.write('%s Received %sn'%(time.ctime(), filename))
                    log.flush()
                else:
                    f.write(data)
                    f.flush()
            conn.close()
    s.close()


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Manual to the script')
    parser.add_argument('--host',type=str,default='localhost',help='input listening host')
    parser.add_argument('-p',type=int,required=True,help='input listening host's port')
    args = parser.parse_args()
    IP = args.host
    Port =args.p
    log = open('log.txt','w+')
    main(IP, Port, log)

两台机器：192.168.0.21 和 192.168.0.27

21作client端，27作server端

27上监听：

python socket_server.py --host '192.168.0.27' -p 12345

21上连接：

python socket_client.py -d '/root/test/' --host '192.168.0.27' -p 12345