python-- 上传小文件

import socket
server = socket.socket(type=socket.SOCK_DGRAM)  # udp协议
server.bind(('127.0.0.1', 12345))
# 收发
while 1:
    msg, addr = server.recvfrom(1024)  # 接受来自哪里的消息,addr元组类型，是ip和端口
    print(msg.decode('utf-8'))
    data = input('>>>')
    server.sendto(data.encode('utf-8'), addr)  # 发送消息

import socket
client = socket.socket(type=socket.SOCK_DGRAM)
while 1:
    msg_s = input(">>>")
    client.sendto(msg_s.encode('utf-8'), ('127.0.0.1', 12345))
    msg, addr = client.recvfrom(1024)
    print(msg.decode('utf-8'))

import socket
class MySocket(socket.socket):  # 继承自 socket文件中的socket类,此时socket就是父类
    def __init__(self, encoding='utf-8'):
        self.encoding = encoding
        super(MySocket, self).__init__(type=socket.SOCK_DGRAM)  # 执行父类socket中的__init__方法
    def my_sendto(self, msg, addr):
        return self.sendto(msg.encode(self.encoding), addr)  # 调用父类中的sendto方法
    def my_recvfrom(self, num):
        msg_r, addr = self.recvfrom(num)  # 调用父类的recvfrom方法
        return msg_r.decode(self.encoding), addr

from My_UDP import MySocket
sk = MySocket()
sk.bind(('127.0.0.1', 8080))
msg, addr = sk.my_recvfrom(1024)
print(msg)
sk.close()

from My_UDP import MySocket
sk = MySocket()
sk.my_sendto('abcabc中国', ('127.0.0.1', 8080))
sk.close()

import socket
import json
sk = socket.socket()
sk.bind(('127.0.0.1', 8080))
sk.listen()
conn, addr = sk.accept()
str_dic = conn.recv(9090).decode('utf-8')
dic = json.loads(str_dic)
# dic = {'opt':menu.get(num),'filename':filename,'content':content}
if dic['opt'] == 'upload':
    # 上传
    filename = '1' + dic['filename']
    with open(filename, 'w', encoding='utf-8') as f:
        f.write(dic['content'])
elif dic['opt'] == 'download':
    # 下载
    pass
conn.close()
sk.close()

import socket
import os
import json
sk = socket.socket()
sk.connect_ex(('127.0.0.1', 8080))  # 带返回值,如果出错,不会报错,会返回错误的编码
# sk.connect()# 会直接报错    两个都是连接服务器的功能
menu = {'1': 'upload', '2': 'download'}
for k, v in menu.items():
    print(k, v)
num = input('请输入功能选项:')
if num == '1':
    # 上传功能
    # {你要执行的功能, 文件名, 文件内容}
    dic = {'opt': menu.get(num), 'filename': None, 'content': None}
    file_path = input('请输入一个文件的绝对路径>>>')
    filename = os.path.basename(file_path)
    with open(file_path, 'r', encoding='utf-8') as f:
        content = f.read()
    dic['filename'] = filename
    dic['content'] = content
    str_dic = json.dumps(dic)
    sk.send(str_dic.encode('utf-8'))
elif num == '2':
    # 下载功能
    pass
else:
    print('错误')
sk.close()