Python--day32--ftp文件传输报错的原因

解决办法：把buffer改小

server.py

#实现一个大文件的上传或下载
#配置文件 ip地址 端口号
import json
import socket
import struct
sk = socket.socket()
#起服务
sk.bind(('127.0.0.1', 8090))
sk.listen()
10 buffer = 1024
conn,addr = sk.accept()
#接收
head_len = conn.recv(4)
head_len = struct.unpack('i', head_len)[0]
json_head = conn.recv(head_len).decode('utf-8')
head = json.loads(json_head)
filesize = head['filesize']
with open(head['filename'], 'wb') as f:
    while filesize:
        print(filesize)
        if filesize >= buffer:
            content = conn.recv(buffer)
            f.write(content)
            filesize -= buffer
        else:
            content = conn.recv(filesize)
            f.write(content)
            break
conn.close()
sk.close()

client.py

#发送端
import os
import json
import struct
import socket
sk = socket.socket()
sk.connect(('127.0.0.1', 8090))
 8 buffer = 1024

#发送文件
head = {'filepath':r'C:UsersAdministratorDesktop',
        'filename':r'test.txt',
        'filesize':None}
fie_path = os.path.join(head['filepath'],head['filename'])
filesize = os.path.getsize(os.path.join(head['filepath'],head['filename']))

head['filesize'] = filesize
json_head = json.dumps(head)   #字典转成了字符串
bytes_head = json_head.encode('utf-8')       #字符串转bytes
print(json_head)
print(bytes_head)
#计算head的长度
head_len = len(bytes_head)  #报头的长度
pack_len = struct.pack('i', head_len)
sk.send(pack_len)   #先发报头的长度
sk.send(bytes_head) #再发送bytes类型的报头
with open(fie_path, 'rb') as f:
    while filesize:
        print(filesize)
        if filesize >= buffer:
            content = f.read(buffer) #每次读出来的内容
            sk.send(content)
            filesize -= buffer
        else:
            content = f.read(filesize)
            sk.send(content)
            break
sk.close()