python network programming book

objects, once a handle has changed +R_list,w_list,e_list = Select.select (inputs,outputs,inputs,1) - Print(' Listening socket object%d '% len (inputs)) + Print(r_list) AFor Sk1_or_conn in R_list: at#每一个连接对象 - ifSk1_or_conn = = Sk1: -#表示有新用户来连接 -Conn, address = Sk1_or_conn.accept () -Inputs.append (conn) - Else: in#有老用户发消息了 -Try toData_bytes = SK1_OR_CONN.RECV (1024) +Except Exception as ex: -#如果用户中断连接 theInputs.remove (Sk1_or_conn) * Else: $#用户正常发消息Panax Noto

= ' Link encap:ethernet HWaddr 00:0c:29:ef:84:a3 inet addr:192.168.31.140 bcast:192 .168.31.255 mask:255.255.255.0 Inet6 addr:fe80::20c:29ff:feef:84a3/64 scope:link up broadcast RUNNING Multicast mtu:1500 metric:1 RX packets:236844 errors:0 dropped:0 overruns:0 frame:0 TX packets:233949 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1076587 102.6 MiB TX bytes:41874253 (39.9 mib) "header = Pkgbuildheader (len)) sendData1 = Header.pack_h Eader + Body.encode

, target, name ="tedu", args = (), Kwargs ={}): Super ().__init__()#Reload the __init__ initialization method of the parent classSelf.target =Target Self.name=name Self.args=args Self.kwargs=KwargsdefRun (self):#call the Run method automatically when you create an object#The thread function to be executed in the call to run Si Cho is to receive a universal pass in the form of a tuple and a dictionarySelf.target (*self.args, * *Self.kwargs)#Thread Functionsdefplayer (song,sec): forIinchRange (2):

Using socket programming can be divided into TCP-based and based on UDP,TCP and UDP The main difference is whether there is a connection-oriented.TCP -based socket process:UDP -based socket flowchart:(The above two figures are from the network)You can see that UDP-based sockets are much simpler, UDP clients do not need to connect in advance, and UDP servers do not need listen and accept.The following is a s

Python 3.x Study Notes 13 (Network Programming socket), pythonsocket 1. ProtocolHttp, smtp, dns, ftp, ssh, snmp, icmp, dhcp... 2. Layer 7 OSIApplication, representation, session, transmission, network, data link, physical 3. socket: Encapsulation of all upper-layer protocols 4. Common socket Functions1) sk. bind (addre

) - - #Activate the server; this would keep running until you - #Interrupt The program with CTRL-C -Server.serve_forever () Client Side 1 ImportSocket2 ImportSYS3 4HOST, PORT ="localhost", 99995data =" ". Join (Sys.argv[1:])6 7 #Create a socket (sock_stream means a TCP socket)8Sock =Socket.socket (socket.af_inet, socket. SOCK_STREAM)9 Ten Try: One #Connect to server and send data A Sock.connect ((HOST, PORT)) -Sock.sendall (bytes (data +"\ n","Utf-8")) - the

Basic Analog Call Network program:1 #Client2 ImportSocket3 4Client =Socket.socket ()5Client.connect (('localhost', 6969))6Client.send (b"Hello ni hao")#only byte codes can be transferred in Python37data = CLIENT.RECV (1024)#1024 Specify the accepted data size to assign the accepted data to the value to data8 Print("recv:", data)9Client.close ()1 ImportSocket2 3 #Service Side4Server =Socket.socket ()5Server.bind (('localhost', 6969))#bind to listen por

This paper illustrates the data transmission UDP implementation method of Python network programming. Share to everyone for your reference. The specific analysis is as follows: First, the question: Do you think that tools like msn,qq on the Web transmit data mysteriously between machines? You want to play a little bit, too? Do you pass data between the two mach

compatible with python3x): https://www.djangoproject.com/download/2.Django after download for the compressed package, unzip and python in the same root directory, under Cmd into the Django-1.7.2 (reader may version of the different) directory, execute Python setup.py install, and then start the installation, Django will be installed into Python's lib under Site-packages.StartUse the following command in CM

Socket network programming for python O M development 04Note:This article comes fromFrom Beijing Old Boy linux O M training center-O M development course free video content, The content of this article is a series of content, for more information can be seen: http://oldboy.blog.51cto.com/2561410/1120636 1) Video practices (better full-screen viewing) For m

..Html1. Basic cognitionHTML(Hypertext Markup Language) Hypertext Markup Language, an application under the standard Universal Markup Language. "Hypertext" means that the page can contain pictures, links, or even music, programs and other non-text elements. The structure of Hypertext Markup Language includes the header section (English: Head), and the "Subject" section (English: Body), where the "Head" section provides information about the Web page, and the "subject" part provides the specific

will be different too. Also note that the last stream we receive is 1767, the next call to Recv () we will receive a 0-length string, which tells us that the server has called close () to close the socket on its end, and no more data will be sent.We can cancel the Time.sleep () comment and slow down the time interval of our successive calls to Recv (). In this way, we wait for a quarter of a second before each call, so that the server catches up with us sending more data before calling Recv ().

= "localhost"Port = 10000S = socket. socket (socket. AF_INET, socket. SOCK_STREAM)S. connect (host, port ))S. send ("hello from client ")S. close () 3. Use the socketserver framework to write TCP servers The Socketserver module simplifies the compilation of network servers. It contains four types of servers. TCPServer uses the TCP protocol, UDPServer uses the UDP protocol, and there are two uncommon ones, UnixStreamServer and unixw.ramserver, these

Python network programming: basic use of socketserver, pythonsocketserverContent: Introduction to socketserver Use of socketserver Asynchronous Server of socketserver Start Time: You can also use socketserver to create a socketSocketserver introduction: Socketserver is an advanced module in the standard library. Socketserver simplifies the code for crea

theSetup ()andFinish ()methods, and provideSelf.rfileandSelf.wfileAttributes.Self.rfileandSelf.wfileCan is read or written, respectively, to get the request data or return data to the Client. Note that point 2,with respect to the Setdaemon property of the thread object, True indicates that the server thread is a background thread, and when no activity is connected to the background thread, the program executes automatically exits, and when there is no active Non-background thread activi

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, which in turn calls the Handle method of Myrequesthandler) Threadingtcpserver related source code:Baseserver TCPServer threadingmixin ThreadingtcpserverRequestHandler related source codeSocketserver.baserequesthandlerInstance:Server-Side ClientSOURCE Streamlining:View CodeAs

()UDP client:1 ImportSocket2 3HOST ="127.0.0.1" #' localhost ' can also4PORT = 99995Buffsize = 10246ADDR =(HOST, PORT)7 #create sockets to send data without a connect connection8Udpclientsock =Socket.socket (socket.af_inet, socket. SOCK_DGRAM)9 Ten whileTrue: Onedata = input (">>") A ifdata = ="Q" ordata = ="quit": - Break -Udpclientsock.sendto (bytes (data, encoding="Utf-8"), ADDR) theRecvData, addr =Udpclientsock.recvfrom (buffsize) - if notRecvData: - Break -

request handler class.Next you have to instantiate a server class that, during instantiation, needs to pass in the service-side address and the class of the request handle.3.Then Call the Handle_request () or Serve_forever () method of the server object to process one or many requests.Then, execute the handle_request () or Serve_forever () method of the server object to process one or more requests.4.Finally, call Server_close () to close the socket.Finally, execute the Server_close () method t

;"). Strip ()If not user_input:Continuecmd = user_input.split () [0]If Hasattr (self,cmd):Func = GetAttr (self,cmd)Func (User_input.split ())def put (Self,args):cmd = args[0]filename = args[1]If not os.path.isfile (filename):Print "File is not exists!!"Return NoneElseFileSize = os.path.getsize (filename)Head_dic = {' cmd ': cmd, ' file_name ': os.path.basename (filename), ' file_size ': filesize}Print Head_dicHead_json = Json.dumps (head_dic). Encode ("Utf-8")Head_struct_size = Struct.pack (' i

We usually use on the computer program such as: Thunder, WORD,QQ, Firefox, etc., these unified called application software, Python development is also the main development of this application software.If QQ this application wants to run, we must first download QQ installs the software, then installs on the operating system,But the operating system is also software, but it is a system software, software to allow must be on the hardware, that is, must h