网络编程之socketsocket:在网络编程中的一个基本组件，也称套接字。一个套接字就是socket模块中的socket类的一个实例。套接字包括两个：　　服务器套接字和客户机套接字套接字的实例化需要3个参数：　　1.地址簇：socket.AF_INET　　2. 流：socket.SOCK_STREAM　　3.使用的协议： 默认为0服务器套接字：以下简称socket_server客户端套接字：以下简称socket_client地址：address=(‘127.0.0.1‘,8000)socket_server使用bind方法绑定address,再调用listen方法去监听，控制排队等候连接的最大数socket_client使用connect方法连接到服务器，使用的地址与服务器bind的地址相同套接字有两个方法：　　send(1024) #发送数据，每次最多发送1024bytes　　recv(1024) #接收数据，每次最多接收1024bytes**python库相关参考文档地址：http:python.org/doc/lib/module_socket.html*****简单的套接字交互*****server端:import socket# #family typesk=socket.socket()print(sk)address=(‘127.0.0.1‘,8000)sk.bind(address)sk.listen(3)print(‘waiting......‘)while 1:conn, addr = sk.accept()print(addr)while 1:try:data = conn.recv(1024)except Exception:breakif not data: breakprint(‘.........‘, str(data, ‘utf8‘))inp=input(‘>>>‘)conn.send(bytes(inp,‘utf8‘))sk.close()client端：import socketsk=socket.socket()print(sk)address=(‘127.0.0.1‘,8000)sk.connect(address)while True:inp=input(‘>>>‘)if inp == ‘exit‘:breaksk.send(bytes(inp,‘utf8‘))data=sk.recv(1024)print(str(data,‘utf8‘))sk.close()*****在client端输入shell命令,在服务器端执行命令后，返回结果*****server端：import subprocessimport socket# #family typesk=socket.socket()print(sk)address=(‘127.0.0.1‘,8000)sk.bind(address)sk.listen(3)print(‘waiting......‘) while 1:conn, addr = sk.accept()print(addr)while 1:try:data = conn.recv(1024)except Exception:breakif not data: breakprint(‘.........‘, str(data, ‘utf8‘))obj=subprocess.Popen(data.decode(‘utf8‘),shell=True,stdout=subprocess.PIPE)cmd_result=obj.stdout.read()result_len=bytes(str(len(cmd_result)),‘utf8‘)print(‘>>>>>>‘,result_len)conn.sendall(result_len)#粘包现象 1600conn.recv(1024)#解决粘包conn.sendall(cmd_result)sk.close()client端：import subprocessimport socket# #family typesk=socket.socket()print(sk)address=(‘127.0.0.1‘,8000)sk.bind(address)sk.listen(3)print(‘waiting......‘) while 1:conn, addr = sk.accept()print(addr)while 1:try:data = conn.recv(1024)except Exception:breakif not data: breakprint(‘.........‘, str(data, ‘utf8‘))obj=subprocess.Popen(data.decode(‘utf8‘),shell=True,stdout=subprocess.PIPE)cmd_result=obj.stdout.read()result_len=bytes(str(len(cmd_result)),‘utf8‘)print(‘>>>>>>‘,result_len)conn.sendall(result_len)#粘包现象 1600conn.recv(1024)#解决粘包conn.sendall(cmd_result)sk.close() *****ftp*****server端：import subprocessimport socket# #family typeimport ossk=socket.socket()print(sk)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, addr = sk.accept()while 1:data=conn.recv(1024)cmd,filename,filesize=str(data,‘utf8‘).split(‘|‘)path=os.path.join(BASE_DIR,‘yuan‘,filename)filesize=int(filesize)f=open(path,‘ab‘)has_receive=0while has_receive!=filesize:data=conn.recv(1024)f.write(data)has_receive+=len(data)f.close()client端：import socketimport ossk=socket.socket()print(sk)address=(‘127.0.0.1‘,8000)sk.connect(address)BASE_DIR=os.path.dirname(os.path.abspath(__file__))while True:inp=input(‘>>>‘).strip()# post|11.pngcmd,path=inp.split(‘|‘)path=os.path.join(BASE_DIR,path)filename=os.path.basename(path)file_size=os.stat(path).st_sizefile_info=‘post|%s|%s‘%(filename,file_size)sk.sendall(bytes(file_info,‘utf8‘))f=open(path,‘rb‘)has_sent=0while has_sent!=file_size:data=f.read(1024)sk.sendall(data)has_sent+=len(data)f.close()print(‘上传成功‘)