python day32--struct,文件上传下载

一、struct模块

可以把要发送的数据长度转换成固定长度的字节

struct.pack('i',数据长度)

struct.unpack('i',数据长度)

二、上传下载文件作业

server

import struct
import socket
import json
import os
sk=socket.socket()
sk.bind(('127.0.0.1',8080))
sk.listen()
conn,addr=sk.accept()
header_len=conn.recv(4)
header_len=struct.unpack('i',header_len)[0]
header_by=conn.recv(header_len)
header=json.loads(header_by)
filename=header['filename']
fileside=header['fileside']
buffer=4096
with open(filename,'wb') as f:
    while fileside:
        if fileside>=buffer:
            content=conn.recv(buffer)
            f.write(content)
            fileside-=buffer
            print(fileside)
        else:
            content=conn.recv(fileside)
            break
conn.close()
sk.close()

client

import struct
import socket
import json
import os
sk=socket.socket()
sk.connect(('127.0.0.1',8080))
header={'filepath':r'E:人工智能python课件基础班-就业班课件资料 -1-4位基础班  5-14就业班14-人工智能阶段：-机器学习-深度学习-实战项目30-36深度学习'
        ,'filename':r'对抗生成网络.zip'
        ,'fileside':None}
file_path=os.path.join(header['filepath'],header['filename'])
header['fileside']=os.path.getsize(file_path)
fileside=header['fileside']
json_header=json.dumps(header).encode('utf-8')
header_len=struct.pack('i',len(json_header))
sk.send(header_len)#发送报文的长度
sk.send(json_header)#发送报文
buffer=4096
with open(file_path,'rb') as f:
    while  fileside:
        if fileside>=buffer:
            content=f.read(buffer)
            sk.send(content)
            fileside-=buffer
            print(fileside)
        else:
            content = f.read(fileside)
            sk.send(content)
            break
sk.close()