python socket programming

the socket. S.setblocking (flag) If flag is 0, the socket is set to nonblocking mode, otherwise the socket is set to blocking mode (the default value). In nonblocking mode, if the call recv () does not find any data, or the Send () call cannot send the data immediately, the Socket.error exception is raised. S.makefile () Create a file associated with the socket3

Python socket network programming TCP/IP server and client communication, pythonsocket Python socket network programming I have bought two books, "python

() Close the socket. S.getpeername () Returns the remote address of the connection socket. The return value is typically a tuple (ipaddr,port). S.getsockname () Returns the socket's own address. Typically a tuple (ipaddr,port) S.setsockopt (Level,optname,value) Sets the value of the given socket optio

Python development [Article 8]: socket network programming, python Article 8 Server: Client: Server output: Client output: Continuous sending information: Server: Client: Run commands on the linux Client Server: Client: File Sending in linux Server: Client: Up to 32768 data records can be sent at a time (different syst

Python 3 Socket Programming one client/server architectureThe internet is the C/s architecture everywhere1, c/s structure, that is, client/server (client/server) structure2, in the Internet everywhere visible c/s architecture such as browser, online video, a variety of social software.The relationship between C/s architecture and socket:We learn sockets for the d

Python socket programming example This example describes the Python socket programming in detail. Share it with you for your reference. The details are as follows: Copy the Code as follows: Sock =

that a socket can appear in multiple lists. The call select is blocked, but you can give it a time-out.Returns a list of 3. Contains readable, writable, and erroneous sockets.If a socket is in a readable list, then the call recv must return something to it. The same is true for writable. You can then use the read-write method used in the blocking operation above. Create a server

is always listening for client requests to arrive ... When a client connection arrives at the server Executes the Threadingmixin.process_request method, creating a "thread" to handle the request Execute the Threadingmixin.process_request_thread method Executes the Baseserver.finish_request method and executes self. Requesthandlerclass () is the construction method that executes the custom Myrequesthandler (automatically calls the constructor of the base class Baserequesthandler,

the specified socket option Example:>>> Import Socket>>> socket.gethostbyname (' www.baidu.com ')' 220.181.111.147 '>>> socket.gethostbyname (' www.126.com ')' 123.125.50.22 '>>> socket.getfqdn (' 123.125.50.22 ')' 123.125.50.22 'Here Getfqdn but can't return domain name? 5, processing errorsThe main thing about handling error exceptions is to use try, except statements. For example, modify the gophercli

sockets1 . Socket family based on file type　　　　Socket family name: Af_unixUnix all files, file-based sockets are called by the underlying file system to fetch data, two sockets process running on the same machine, you can access the same file system to complete the communication indirectly2 . Socket family based on network type　　　　

= self.request addr = Self . client_address # above two lines of code, equal to CONN,ADDR = Socket.accept (), but in the Socketserver module has been packaged for us, but also for our packaging including bind (), listen (), a Ccept () method while 1:accept_data = str (CONN.RECV (1024x768), encoding= "UTF8") print (ACCE Pt_data) If Accept_data = = "Byebye": Break send_data = bytes (Input ("> Gt;>>> "), encoding=" UTF8 ") Conn.sendall (Send_data) conn.close () if __name__ = = ' __main__ ': Sever

Af_inet is the most widely used one in all address families, Python supports a variety of address families, but since we only care about network programming, most of the time I use af_inet only)Six, Socket workflowA scene in the life. You have to call a friend, dial first, a friend hears a phone call, and then you and your friend establish a connection, you can

TCP/UDP standard.Third, TCP-based socketClassification of sockets:Socket family based on file type: Af_unix (on UNIX systems, everything is file, file-based sockets call the underlying filesystem to fetch data, two socket processes run on the same machine at the same time, can communicate indirectly by accessing the same file system)Socket family based on network type: af_inet (

Network Programming in Pythonfirst, socket () ModuleSecond, create a TCP serverThird, create a TCP clientFirst,socket moduleSocket:Sockets are originally created for applications on the same host, allowing a program (aka one process) running on the host to communicate with another running program. This is called interprocess communication (Inter processcommunicat

connected, Then go to the socket in the listen state to find */return SK? : __inet_lookup_listener (NET, Hashinfo, daddr, Hnum, dif);} Summarize the process: Server side After calling listen, the kernel establishes two queues, the SYN queue, and the accept queue, where the length of the accept queue is specified by the backlog. After the server has called accept, it blocks, waits for an element of the accept queue, and after the client calls connect