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:\Users\Administrator\Desktop',
         '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()