socket编程实现文件的上传和下载

server端

#!/usr/bin/env python
# coding:utf-8
import socket
import struct
import json
buffer = 1024
sk = socket.socket()
sk.bind(('127.0.0.1',8888))
sk.listen()
conn,addr = sk.accept()
ret = conn.recv(4)
len_operate_c = struct.unpack('i',ret)[0]
operate_c = conn.recv(len_operate_c)
operate_c = operate_c.decode('utf-8')
if operate_c == 'upload':
    res = conn.recv(4)
    len_head = struct.unpack('i',res)[0]
    head = conn.recv(len_head).decode('utf-8')
    head = json.loads(head)
    filesize = head['filesize']
    filename = head['filename']
    with  open (filename,'wb') as  f:
        while filesize:
            if filesize >= buffer:
                content = conn.recv(buffer)
                f.write(content)
                filesize -= buffer
            else :
                content = conn.recv(filesize)
                f.write(content)
                filesize = 0
conn.close()
sk.close()

client端

#!/usr/bin/env python
# coding:utf-8
def get_filename(file_path):
    return os.path.basename(file_path)
import socket
import os
import json
import struct
buffer = 1024
sk = socket.socket()
sk.connect(('127.0.0.1',8888))
operate = ['download','upload']
for  k,j  in  enumerate(operate,1) :
    print(k,j)
num = int(input('请输入你的选项： '))
operate_c = operate[(num-1)]
len_operate_c = len(operate_c)
print(len_operate_c)
res = struct.pack('i',len_operate_c)
sk.send(res)
sk.send(operate_c.encode('utf-8'))
if operate_c == 'upload' :
    head = {'filename':None,'filesize':None,}
    file_path = input("请输入要上传的文件绝对路径 ：")
    filename = get_filename(file_path)
    head['filename'] = filename
    filesize = os.path.getsize(file_path)
    head['filesize']=filesize
    json_head = json.dumps(head)
    len_head = len(json_head)
    ret = struct.pack('i',len_head)
    sk.send(ret)
    sk.send(json_head.encode('utf-8'))
    with open (file_path,'rb') as f:
        while filesize:
            if filesize >= buffer :
                content =  f.read(buffer)
                sk.send(content)
                filesize -= buffer
            else :
                content = f.read(filesize)
                sk.send(content)
                filesize = 0
sk.close()