import socket
import sys
 
HOST,PORT = "172.18.0.3",19984
 
def main():
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.connect((HOST, PORT))
    
    #包頭標志
    arrBuf = bytearray(b'\xff\xaa\xff\xaa')
    
    #以二進制方式讀取圖片
    picData = open('1.jpg', 'rb')
    picBytes = picData.read()
    
    #圖片大小
    picSize = len(picBytes)
    
    #數據體長度 = guid大小(固定) + 圖片大小
    datalen = 64 + picSize
    
    #組合數據包
    arrBuf += bytearray(datalen.to_bytes(4, byteorder='little'))
    guid = 23458283482894382928948
    arrBuf += bytearray(guid.to_bytes(64, byteorder='little'))
    arrBuf += picBytes
    
    sock.sendall(arrBuf)
    sock.close()
 
if __name__ == '__main__':
    main()

import socketserver
import os
import sys
import time
import threading
 
ip_port=("172.18.0.3",19984)
 
class MyServer(socketserver.BaseRequestHandler):
    def handle(self):
        print("conn is :",self.request) # conn
        print("addr is :",self.client_address) # addr
        
        while True:
            try:
                self.str = self.request.recv(8)
                data = bytearray(self.str)
                headIndex = data.find(b'\xff\xaa\xff\xaa')
                print(headIndex)
                
                if headIndex == 0:
                    allLen = int.from_bytes(data[headIndex+4:headIndex+8], byteorder='little')
                    print("len is ", allLen)
 
                    curSize = 0
                    allData = b''
                    while curSize  allLen:
                        data = self.request.recv(1024)
                        allData += data
                        curSize += len(data)
 
                    print("recv data len is ", len(allData))
                    #接收到的數據，前64字節是guid，后面的是圖片數據
                    arrGuid = allData[0:64]
                    #去除guid末尾的0
                    tail = arrGuid.find(b'\x00')
                    arrGuid = arrGuid[0:tail]
                    strGuid = str(int.from_bytes(arrGuid, byteorder = 'little')) #for test
                    
                    print("-------------request guid is ", strGuid)
                    imgData = allData[64:]
                    strImgFile = "2.jpg"
                    print("img file name is ", strImgFile)
 
                    #將圖片數據保存到本地文件
                    with open(strImgFile, 'wb') as f:
                        f.write(imgData)
                        f.close()
                        
                    break
            except Exception as e:
                print(e)
                break
 
 
if __name__ == "__main__":
    s = socketserver.ThreadingTCPServer(ip_port, MyServer)
    print("start listen")
    s.serve_forever()