网络编程-socket实现连接循环

解决报端口被使用错误

phone.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR)

 bug 1：客户端敲回车被卡主，客户端被卡在recv等待接收数据

import socket
client=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
client.connect(('127.0.0.1',8080))
#通信循环
while True:
    msg=input('>> ').strip()
    if not msg:continue#避免用户输入空字符串导致客户端卡死
    client.send(msg.encode('utf-8'))
    data=client.recv(1024).decode('utf-8')
    print(data)
#关闭连接
client.close()

bug 2:客户端单方面断开后，linux平台上服务端会出现死循环接收数据，导致服务器卡死。window平台会直接报错。

Linux服务端

import socket
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#解决提示端口被使用问题
phone.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn,client_addr=phone.accept()
print(client_addr)
#通信循环
while True:
    data=conn.recv(1024)
    if not data:break#客户端单方面死掉，服务端会收到空字符串
    conn.send(data.upper())
conn.close()
phone.close()

Windows服务端

import socket
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#解决提示端口被使用问题
phone.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn,client_addr=phone.accept()
print(client_addr)
#通信循环
while True:
    try:
        data=conn.recv(1024)
        conn.send(data.upper())
    except ConnectionResetError:
        break
conn.close()
phone.close()

客户端

import socket
client=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
client.connect(('127.0.0.1',8080))
#通信循环
while True:
    msg=input('>> ').strip()
    if not msg:continue#避免用户输入空字符串导致客户端卡死
    client.send(msg.encode('utf-8'))
    data=client.recv(1024).decode('utf-8')
    print(data)
#关闭连接
client.close()

实现server端循环连接：

import socket
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#解决提示端口被使用问题
phone.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
while True:#连接循环
    conn,client_addr=phone.accept()
    print(client_addr)
    while True:#通信循环
        try:
            data=conn.recv(1024)
            if not data: break  # 客户端单方面死掉，服务端会收到空字符串
            conn.send(data.upper())
        except ConnectionResetError:
            break
    conn.close()#连接关闭
phone.close()#套接字关闭