socket模块,简单的套接字,加循环

服务端:

import socket

#1.买手机
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM) #SOCK_STEAM=>TCP流式协议,
print(phone) #是用来接收链接请求,从而建立链接的

# phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
# print(phone)


#2.插手机卡
phone.bind(('127.0.0.1',8080)) #0-65535

#3.开机
phone.listen(5) # 同一时刻最大请求数为5个

print('start....')
#4.等待电话请求
conn,client_addr=phone.accept() #(双向链接的套接字对象,存放客户端ip和端口的小元组)
# print(conn) # conn代表双向链接,用来收发消息
# print(client_addr)

#5.收\发消息
data=conn.recv(1024) #1024接收的最大字节数bytes
print('收到客户的数据',data)
conn.send(data.upper())

#6.挂电话链接
conn.close()

#7.关机
phone.close()

客户端:

import socket

#1.买手机
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM) #SOCK_STEAM=>TCP流式协议,

#2.拨号
phone.connect(('127.0.0.1',8080))

#3.发\收消息
phone.send('hello'.encode('utf-8')) # 只能发bytes类型
data=phone.recv(1024)
print('收到服务端的消息: ',data)

#4.挂电话链接
phone.close()

通信循环模板:

服务端:

import socket

iphone = socket.socket()

iphone.bind(('127.0.0.1',5000))

iphone.listen()

while True:
    client,addr = iphone.accept()
    print(type(client),client,type(addr),addr)
    while True:
        try:
            data = client.recv(1024)
            if not data:
                client.close()
                break

            print('收到客户端消息:%s'% data.decode('utf-8'))
            client.send(data.upper())
        except ConnectionResetError:
            print('客户端强行关闭了连接')
            client.close()
            break
client.close()
iphone.close()

客户端:

import socket

iphone = socket.socket()

iphone.connect(('127.0.0.1',5000))

while True:
    msg = input('>>: ').strip()
    iphone.send(msg.encode('utf-8'))
    data = iphone.recv(1024)
    print('收到服务端消息:%s'%data.decode('utf-8'))

iphone.close()

基于UDP的通信循环:

服务端:

import socket

# UDP协议 在创建socket是 只有一个类型不同
server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,proto=0)

server.bind(("127.0.0.1",8888))


while True:
    data,addr = server.recvfrom(1024) # 阻塞 直到收到数据为止
    print("收到来自%s的消息:%s" % (data.decode("utf-8"),addr[0]))
    # 返回值为 数据 和 对方ip地址 和端口号
    server.sendto(data.upper(),addr)

print(res)
server.close()


# 写一个UDP的多人聊天程序
#


客户端:

import socket

client = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,0)



while True:
    data = input(">>:").encode("utf-8")
    client.sendto(data,("127.0.0.1",8888))
    d,addr = client.recvfrom(1024)
    print(d.decode("utf-8"))

client.close()