python对于ota的应用_【python】OTA升级服务端程序，TCP连接，带文档
[Python] 纯文本查看 复制代码import socketserver
import time
import os
import re
class MyTcpHandler(socketserver.BaseRequestHandler):
def handle(self):
step=0
filepath = 'null'
filesize = 0
files = None
conbuf = None
limit = None
cnt = 0
while True:
try:
data = self.request.recv(1024)
print(data)
if not data: break # 此行代码针对linux系统
recvstr = data.decode(encoding="utf-8")
if step == 0:#判断设备名
if recvstr.find('device')==-1:
self.request.send(b"cmderr:1")#未匹配到指令
else:
modestr = recvstr[recvstr.find('#')+1:]
oldver = re.sub(r'\D', "", modestr)
filename = re.sub(r'\d', "", modestr)
print ('ver'+oldver+' name='+filename)
print()
for i in range(50):
if os.path.exists(os.path.abspath('.')+'\\bin\\'+filename+str(int(oldver)+i+1)+'.bin')==True:
filepath = os.path.abspath('.')+'\\bin\\'+filename+str(int(oldver)+i+1)+'.bin'
print(os.path.abspath('.')+'\\bin\\'+filename+str(int(oldver)+i+1)+'.bin')
if filepath == 'null':
self.request.send(b"cmderr:3")#未匹配到指令
else:
step=1
newver = "newver:"+re.sub(r'\D', "", filepath)
self.request.send(newver.encode(encoding="utf-8"))
#打开文件
filesize = os.path.getsize(filepath)
files = open(filepath,'rb')
elif step ==1:#判断auto还是control
if recvstr.find('auto')!=-1:
step=10
filesizestr = str(filesize)
limit = int(filesize/1024) + 1
self.request.send(filesizestr.encode(encoding="utf-8"))
elif recvstr.find('control')!=-1:
step=20
filesizestr = str(filesize)
self.request.send(filesizestr.encode(encoding="utf-8"))
limit = int(filesize/1024) + 1
cnt = 0
else:
self.request.send(b"cmderr:1")#未匹配到指令
elif step ==10:#自动模式
if recvstr.find('start')==-1:
self.request.send(b"cmderr:1")#未匹配到指令
continue
delayms = 1000/ (int(re.sub(r'\D', "", recvstr)))
for i in range(limit):
buf = files.read(1024)
self.request.send(buf)
print('发送数据包:%d/%d' %(i+1,limit))
time.sleep(delayms/1000)
files.close()
print('传输结束')
break #传输结束
elif step ==20:#手动模式
if cnt >= limit:
self.request.send(b"endoffile")
files.close()
print('传输结束')
break
if recvstr.find('next')!=-1:
cnt = cnt + 1
conbuf = files.read(1024)
self.request.send(conbuf)
print('控制传输:%d/%d'%(cnt,limit))
time.sleep(0.03)
elif recvstr.find('resend')!=-1:
if cnt == 0:
conbuf = files.read(1024)
cnt = cnt + 1
self.request.send(conbuf)
print('重新传输:%d/%d'%(cnt,limit))
time.sleep(0.03)
elif recvstr.find('exit')!=-1:
files.close()
print('客户端断开')
break
else:
self.request.send(b"cmderr:1")#未匹配到指令
else:
self.request.send(b"cmderr:-1")#未知错误
except ConnectionResetError:
break
self.request.close()
if __name__ == '__main__':
server = socketserver.ThreadingTCPServer(('0.0.0.0', 6666), MyTcpHandler)
server.serve_forever()