python socket programming

Asynchronous networks are said to greatly improve the connection speed of network servers. Therefore, I plan to write a topic to learn about asynchronous networks. python has a well-known asynchronous Lib: Twisted. OK. First, write a server segment of the python socket to open three ports: Listen, 10001, 10002. in the krondo example, each server is bound with a p

return value is a - string of that length; otherwise it was an integer. - """ - Pass +Subsequent additions explained3.af_inet and Sock_stream Explained1 socket.af_inet--network communication between servers 2 socket. Sock_stream provides an ordered, reliable, bidirectional, and connection-based byte stream, using an out-of-band data transfer mechanism to use TCP for Internet address families. the 3 sock_stream type of

Initial Socket programming (python), socketpython Both parties must have a server and a client, so code should be written separately. So I created two py programs. The first one is the server: iServer. py and the client iClient. py. Server: # Coding: UTF-8From socket import *S =

) - Print("Server recv:", Conn.getpeername (), Data.decode ()) - if notData: - Break +Conn.sendall (data)Client:1 ImportSocket2 3HOST ='localhost'4PORT = 500075 6Client =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Client.connect ((HOST, PORT))8 9 whileTrue:Tenmsg = input (">>>:"). Strip () One ifLen (msg) = =0: A Continue - Client.sendall (Msg.encode ()) - thedata = CLIENT.RECV (1024) - - Print

Python socket Programming Udpby Wusheyingserver.pyImport socketbuf_size = 1024server_addr = (' 127.0.0.1 ', 8888) server = Socket.socket (socket.af_inet,socket. SOCK_DGRAM) Server.bind (SERVER_ADDR) while True: print "Waiting for data" data,client_addr = Server.recvfrom ( buf_size) print ' Connected by ', c

(self, Message = b'Link'): Socket=Socket.socket (socket.af_inet, socket. SOCK_STREAM) Socket.connect (self. Host, self. Port) socket.send (Message)" "Modified 3" "Index, Close, Volume= Struct.unpack ('iff', SOCKET.RECV (1024) [: 12]) socket.close ()returnIndex, Close, Volume f2.py # -*-coding:utf-8-*- Import syssys.path.append ('C:\WinPython-32bit-3.5.1.3\myWorkSpace1') Import = F1.

OK. First, write a server segment of the python socket to open three ports: Listen, 10001, 10002. in the krondo example, each server is bound with a port. During the test, three shells must be opened and run separately. this is too troublesome. We use three threads to run these services. Import optparse import OS import socket import time from threading import Th

Post code, server side:Import socket# s = Socket.socket (socket.af_inet,socket. SOCK_STREAM) host = ' Port = 6074s = Socket.socket (socket.af_inet,socket. Sock_stream) S.bind ((Host,port)) S.listen (1) while 1:conn,addr = S.accept () while 1:print (' connected by ', addr data = CONN.RECV (1024x768) if not data:break conn.sendall (data) conn.close ()Client:Import

1. Service-side1.1 Declaring the Socket objectServer=socket.socket (AF. Inet,socket. SOCK_STREAM)1.2 Binding IP, portServer.bind (localhost,6969)1.3 Start monitoringServer.listen ()1.4 Receiving the listening connection and addressConn,addr=server.accept ()1.5 Receiving dataDATA=CONN.RECV (1024)Print (data)1.6 Sending dataConn.send (data)1.7. Close the connectionConn.close ()import

While flag: REVEIVED_DATA=CLIENT.RECV (1024x768) Print (reveived_data) If Reveived_data = = bytes ("Over", encoding= "u Tf-8 "): Client.close () Flag=false Time.sleep (2) If Reveived_data = = Bytes ("Begin", encoding= "Utf-8"): Client.sendall (bytes (' Msg1 ', encoding= "Utf-8") If Reveived_d ATA = = Bytes ("MSG2", encoding= "Utf-8"): Client.sendall (bytes (' Msg3 ', encoding= "Utf-8") If Reveiv Ed_data = = Bytes ("Msg4", encoding= "Utf-8"): Client.sendall (bytes (' Msg5 ', encodin

Learn python using Python for network programming, write a simple client and server-side communication, most of the content from the Web tutorial, here to summarize for later review.Let's introduce the three-time handshake for TCP: 1, simply send a message:Server-side:Import== ("127.0.0.1", 8888) Sk.bind (ip_port) Sk.listen ( 5)p

Original link: reprint: A simple Python socket programmingSteps for Python to write server:1.The first step is to create the socket object. Call the socket constructor. Such as:Socket = Socket.socket (family, type)The family parameter represents the address family, which can

#服务端代码Importsocket, ThreadingImport Time" "#服务端 TCP connection def tcplink (sock, addr): Print (' Accept new connection from%s:%s ... '% addr) sock.send (b ' welcome! ') While true:data = Sock.recv (1024x768) time.sleep (1) If not data or Data.decode (' utf-8 ') = = ' exit ': Break Sock.send (' Hello,%s! '% data.decode (' Utf-8 ')). Encode (' Utf-8 ')) Sock.close () print (' Connection From%s:%s closed. '% addr) if __name__ = = ' __main__ ': s = socket.socket (socket.af_inet,

On the code, server side:Import Socket,oss = Socket.socket (socket.af_inet,socket. SOCK_STREAM) host = ' Port = 1051s.bind ((host,port)) S.listen (4) While 1:conn,addr = S.accept () while 1:data = CONN.RECV (1024x768) if not data:break os.system (data) Conn.sendall (Data.upper ()) #把字符变为大写conn. Close ()Client side:Import Socket,oss = Socket.socket (socket.af_inet

This article mainly introduces the example of using the original socket for network programming in Python. using sock_raw to accept and send packets can avoid many restrictions on the network protocol, you can refer to the experiment where you need to construct a separate HTTP data packet, and use SOCK_STREAM to send data packets, you need to complete TCP interac

. Sock_seqpacket #废弃了Example: Start the server listening port first, and then start the client:#ServerImportSocketserver=socket.socket () Server.bind ("localhost", 7000))#just bind the port you want to listen toServer.listen ()#Listen, I'm going to listen to this port.Print("I started listening on port 7000---") conn,addr= Server.accept ()#wait for the phone, Conn is the connection instance, addr is the source IP address randomPrint("here's the request.")#data = SERVER.RECV (1024x768) #接收1024#An

;DATANBSP;=NBSP;S.RECV (2048) iflen (data) >0: stat=1 print ("{0}". Format (data)) else: stat+=1 time.sleep (1) ifstat==5: break server: importsocketimportcommandsimporttimehost= "192.168.0.103" port=12345s =socket.socket (Socket.af_inet,socket. SOCK_STREAM) print ("Serverhost={0}port={1}". Format (Host,port)) S.bind ((Host,port)) S.listen (6) conn,addrclient=s.accept () print ("Connectfrom NBSP;{0} ". Format (addrclient)) stat=1while1:cmd=conn.

Python Socket programming details, pythonsocket When using Python for socket programming, you need to use the blocking (default) method to read data streams. At this time, you need to process the data at the end of each time, whic

Beginner script Language Python, test the available TCP communication programs:Server:#!/usr/bin/env python#-*-coding:utf-8-*-import socketimport threadingimport timedef tcplink (sock, addr): print (' Accept new connection from%s:%s ... '% addr); Sock.send (b ' Welcome!!! '); While True: data = SOCK.RECV (1024x768); Time.sleep (1); If not data or Data.decode (' utf-8 ') = = ' e

-example, to-send "Hello, world!" via TCP to Port-the host with address 1.2.3.4, one might get a socket, connect It to the remote host, send the string, then close the socket: 1234 socket socket = getsocket ( type = "TCP" connect (socket, addres