25 python 初学(socket,socketserver),,参考blog :ww
25 python 初学(socket,socketserver),,参考blog :ww
参考blog :www.cnblogs.com/yuanchenqi/articles/5692716.html
1. sk = socket.socket()
里面有两个重要的参数,family 和 type
type:
SOCK_STREAM : tcp 默认
SOCK_DGRAM :udp
family:
family = AF_INET : 服务器之间的通信(默认)
family = AF_INET6 : 服务器之间的通信
family=AF_UNIX:unix不同进程间通信
server 下的方法:
bind() 、listen() 、accept()
recv() 、send() 、sendall()
close()
client 下的方法:
connect()
recv() 、send( string ) 、sendall() # 传送的类型一定是 byte 类型
close()
# _author: lily# _date: 2019/1/25# server 端import socketsk = socket.socket()address = (‘127.0.0.1‘, 8000)sk.bind(address)sk.listen(3)print(‘waiting‘)# print(sk)conn, address_client = sk.accept()while 1: send_data = input(‘input>>‘) if send_data == ‘exit‘: break conn.send(bytes(send_data, ‘utf8‘)) rec_data = conn.recv(1024) print(str(rec_data, ‘utf8‘))conn.close()
# _author: lily# _date: 2019/1/25# client 端import socketsk = socket.socket()# print(sk)adress = (‘127.0.0.1‘, 8000)sk.connect(adress)while 1: rec_data = sk.recv(1024) # 会阻塞,直到收到数据 if not rec_data: break print(str(rec_data, ‘utf8‘)) send_data = input(‘>>‘) sk.send(bytes(send_data, ‘utf8‘))sk.close()
socket 流程:
1. 先开启服务端,bind 绑定ip 和端口;
2. 其次 listen 监听,里面的数字表示有多少客户端可排队(不包括当前正在通信的,排队表示可连接但是不能通信。比如设定上限为3,当第四个客户端来连接时就会报错无法连接)
3. 接着需要 accept(),阻塞等待连接。accept 接受到的值是对方的 sk,进行连接(相当于两端建立了一个通道,server 和 client 都使用的这个通道,只是各自的命名不同)。
4. 保证一收一发原则
5. 关闭时关闭这个通道。 conn.close()
1. 客户端进行连接,先创建一个socket 对象 sk
2. sk 使用 connect 连接服务端
3. 保证一收一发原则
4. 关闭时 sk.close()
粘包现象的解决办法:
加一个 conn.recv(1024) 进行阻塞,将两个连续的conn.send()分隔开
编码拾遗:
str:unicodebytes:十六进制由 str -> bytes:编码s = ‘hello 你好’
b = bytes(s, ‘utf8’)
b2 = s.encode(‘utf8’) # 两个是一样的
由 bytes -> str:解码s2 = str(b2, ‘utf8’)
s2 = b2.decode(‘utf8’)
socketserver:
1.调用模块
2.自己写一个类,继承 socketserver.BaseRequestHandler,并重写 handle()方法
3.main 方法内:
调用 socketserver.ThreadingTCPServer,创建一个实例
# _author: lily# _date: 2019/1/28# Server 端import socketserverclass myserver(socketserver.BaseRequestHandler): # 主要逻辑 def handle(self): print(‘server starting...‘) while True: conn = self.request print(self.client_address) while True: client_data = conn.recv(1024) print(str(client_data, ‘utf8‘)) print(‘waiting‘) send_data = input(‘input>>‘) conn.sendall(bytes(send_data, ‘utf8‘)) # conn.sendall(client_data) conn.close()if __name__ == ‘__main__‘: server = socketserver.ThreadingTCPServer((‘127.0.0.1‘, 8091), myserver) server.serve_forever()
# _author: lily# _date: 2019/1/28# client 端import socketaddress = (‘127.0.0.1‘, 8091)sk = socket.socket()sk.connect(address)print(‘client starting...‘)while True: data = input(‘input>>‘) sk.sendall(bytes(data, ‘utf8‘)) recv_data = sk.recv(1024) print(str(recv_data, ‘utf8‘))sk.close()
实例:
cmd 命令:
server 端:
# _author: lily# _date: 2019/1/26import socketimport subprocesssk = socket.socket()address = (‘127.0.0.1‘, 8000)sk.bind(address)sk.listen(3)print(‘waiting‘)# print(sk)conn, address_client = sk.accept()while 1: try: rec_data = conn.recv(1024) except Exception: break if not rec_data: break print(‘--client message--‘, str(rec_data, ‘utf8‘)) a = subprocess.Popen(str(rec_data, ‘utf8‘), shell=True, stdout=subprocess.PIPE) cmd_result = a.stdout.read() result_len = bytes(str(len(cmd_result)), ‘utf8‘) conn.sendall(result_len) conn.recv(1024) conn.sendall(cmd_result) # send_data = input(‘input>>‘) # conn.send(bytes(send_data, ‘utf8‘))conn.close()View Code
client 端:
# _author: lily# _date: 2019/1/26import socketsk = socket.socket()# print(sk)adress = (‘127.0.0.1‘, 8000)sk.connect(adress)while 1: send_data = input(‘>>‘) if send_data == ‘exit‘: break sk.send(bytes(send_data, ‘utf8‘)) result_len = int(str(sk.recv(1024), ‘utf8‘)) print(result_len) rec_data = bytes() sk.sendall(bytes(‘ok‘, ‘utf8‘)) while len(rec_data) != result_len: rec_data += sk.recv(1024) # 会阻塞,直到收到数据 print(str(rec_data, ‘gbk‘))sk.close()View Code
ftp 传输:
server 端:
# _author: lily# _date: 2019/1/27import socketimport subprocessimport ossk = socket.socket()address = (‘127.0.0.1‘, 8000)sk.bind(address)sk.listen(3)print(‘waiting‘)BASE_DIR = os.path.dirname(os.path.abspath(__file__))while 1: conn, address_client = sk.accept() while 1: data = conn.recv(1024) cmd, filename, filesize = str(data, ‘utf8‘).split(‘|‘) path = os.path.join(BASE_DIR, ‘picture‘, filename) filesize = int(filesize) f = open(path, ‘ab‘) has_receive = 0 while has_receive != filesize: data = conn.recv(1024) f.write(data) has_receive += len(data) f.close()conn.close()View Code
client 端:
# _author: lily# _date: 2019/1/27import socketimport ossk = socket.socket()BASE_DIR = os.path.dirname(os.path.abspath(__file__))adress = (‘127.0.0.1‘, 8000)sk.connect(adress)while 1: send_data = input(‘>>‘).strip() # post|11.png cmd, path = send_data.split(‘|‘) path = os.path.join(BASE_DIR, path) filename = os.path.basename(path) file_size = os.stat(path).st_size file_info = ‘post|%s|%s‘ % (filename, file_size) sk.sendall(bytes(file_info, ‘utf8‘)) f = open(filename, ‘rb‘) has_sent = 0 while has_sent != file_size: data = f.read(1024) sk.sendall(data) has_sent += len(data) f.close() print(‘success‘)sk.close()View Code
server 下的方法:
bind()
listen()
accept()
recv()
send( string )
sendall()
close()
client 下的方法:
connect()
recv()
send( string )
sendall() # 传送的类型一定是 byte 类型
close()
25 python 初学(socket,socketserver)
相关内容
- 用Python绘制青天白日旗和青天白日满地红旗,,青天白日
- python中使用Opencv进行人脸检测,,这两天学习了人脸识别
- python解释器配置和python常用快捷键,,1、准备工作安装
- python数据类型-字典-016,,一、Dictiona
- 练习:python基础+字符串,,1、执行python
- Python数据结构之数字类型,,数字类型种类数字类型
- python测试开发django-55.xadmin使用markdown文档编辑器(djang
- python-计算个人所得税,,最近在学python
- Windows10安装pycocotools方法,亲测可用!,,如果遇到:
- python3.6---isin,,isin:相当于ex
评论关闭