我正在尝试实现一个可以 ping 主机的看门狗,如果它启动,那么它将让 midori 打开远程页面,如果没有,那么它将打开一个本地页面。
我从这里的代码中改编了这个:https ://raspberrypi.stackexchange.com/questions/6981/auto-refresh-for-midori 。
问题是它在每种情况下似乎只工作一次,例如,如果远程站点启动,则显示远程页面,当它关闭时,显示本地页面,但是当远程再次启动时,midori不加载页面。
我已经禁用了 midori 调用,只输出了 up 和 last var,它们是正确的,并且 if 条件正在正确执行,所以看起来它与 popen 和 sub.calls 有关。
关于问题可能是什么的任何想法?
#!/usr/bin/env python
host = "localhost"
port = 888
recheck_time = 10
page_to_open_to = "/"
lurl = "///usr/share/scripts/splash.htm"
last = -1 #undefined state
up = -1 #Undefined state
import subprocess as sub
from time import sleep
import socket
import threading
sub.Popen(["midori", "-a","localhost:888","-e","Fullscreen"]) #open midori
#Check if internet is up
addr = (host, port) #the connection addr
while True:
last = up #reset checking var
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #create socket
try: #attempt to ping, change vars
s.connect(addr)
up = 1
except socket.error:
up = 0
if up == 1 and last == 0:
sub.call(["midori", "-a", "localhost:888","-e","Fullscreen"])
print('up')
elif up == 0 and last == 1:
sub.call(["midori", "-a",lurl,"-e","Fullscreen"])
print("down")
s.close()
print(up,",",last)
sleep(recheck_time)
似乎每次 sub.call() 都会启动一个新进程,直到有 2 个进程,然后什么都没有:
root 3499 0.3 0.5 10792 5856 tty1 S 17:44 0:00 /usr/bin/python /usr/share/scripts/midori.py
root 3500 3.3 4.7 191620 48240 tty1 Sl 17:44 0:03 midori -a localhost:888 -e Fullscreen
root 3530 1.0 2.8 173732 28836 tty1 Sl 17:45 0:00 midori -a ///usr/share/scripts/splash.htm