K_程式人

下方分別有Server端及Client端的code,

Server端要先執行,

並保持運行狀態,

才能持續接收Client端的訊息請求,

Client端則是傳送一筆訊息給Server端,

告知Server端應該回傳什麼訊息給Client,

那這邊的話,

Client端是要求Server端給予HTTP相關的資訊

Server端

import socketserver

import socket

class MyTCPHandler(socketserver.BaseRequestHandler):

    def handle(self):

        self.data = self.request.recv(1024).strip()

        print ("{} wrote:".format(self.client_address[0]))

        print (self.data)

        self.request.sendall(self.data.upper())

if __name__ == "__main__":

    HOST, PORT = socket.gethostname(), 80

    print('HOST: ', HOST)

    print('Port: ', PORT)

    server = socketserver.TCPServer((HOST, PORT), MyTCPHandler)

    server.serve_forever()

Client端

import socket 

import sys

if __name__ == '__main__':    

    serverHost = 'DESKTOP-40IXG82'

    port = 80

    try:

        #create an AF_INET, STREAM socket (TCP)

        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        print ('Socket Created')

        server_ip = socket.gethostbyname(serverHost)

        print('IP Address of ' + serverHost + ' is ' + server_ip)

        s.connect((server_ip, port))

        print('Socket Connected to ' + serverHost + ' on ip ' + server_ip)

        message = "GET / HTTP/1.1\r\n\r\n"

        bytM = message.encode()

        s.sendall(bytM)

        print('Message send successfully')

        recv = s.recv(4096)

        print(recv)

        s.close()

    except socket.error:

        print('Failed!')

        sys.exit()

補充1:

訊息encoding及deconding用法

在Python3裡,

不論是Server端還是Client端要傳送訊息時,

會給一個字串訊息,

並且須對此字串做編碼的動作,

才能被送出,

而接收到訊息,

則需要透過解碼的動作,

才可以拿到原來的字串訊息,

Encoding寫法

mess = 'get data'

enMess = mess.encode()

Decoding寫法

data = request.recv(1024).strip()

data.decode()

補充2:

假設Server回傳訊息比較慢約5秒左右,

Clinet端這邊可以設置delay模式來等待,

如藍字部分所示:

Client端-延長訊息接收時間

import socket 

import sys

import time

if __name__ == '__main__':    

    serverHost = 'DESKTOP-40IXG82'

    port = 80

    try:

        #create an AF_INET, STREAM socket (TCP)

        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        print ('Socket Created')

        server_ip = socket.gethostbyname(serverHost)

        print('IP Address of ' + serverHost + ' is ' + server_ip)

        s.connect((server_ip, port))

        print('Socket Connected to ' + serverHost + ' on ip ' + server_ip)

        message = "GET / HTTP/1.1\r\n\r\n"

        bytM = message.encode()

        s.sendall(bytM)

        print('Message send successfully')

        time.sleep(2) #延長2秒

        recv = s.recv(4096)

        print(recv)

        s.close()

    except socket.error:

        print('Failed!')

        sys.exit()