Query an NTP server from Python
I came across a need to query an
NTP
server to get the current time from a python
script. There are some great python modules you can install which will
take care of the heavy lifting (one great one is ntplib),
but I wanted to be able to do these NTP queries without requiring the host
to install 3rd party python packages.
As it turns out, it wasn't too difficult after checking out a few stack overflow threads, I put together this little script...
Python Pull NPT Time Script
#!/usr/bin/env python
from socket import AF_INET, SOCK_DGRAM
import sys
import socket
import struct, time
def getNTPTime(host = "pool.ntp.org"):
port = 123
buf = 1024
address = (host,port)
msg = '\x1b' + 47 * '\0'
# reference time (in seconds since 1900-01-01 00:00:00)
TIME1970 = 2208988800 # 1970-01-01 00:00:00
# connect to server
client = socket.socket( AF_INET, SOCK_DGRAM)
client.sendto(msg.encode('utf-8'), address)
msg, address = client.recvfrom( buf )
t = struct.unpack( "!12I", msg )[10]
t -= TIME1970
return time.ctime(t).replace(" "," ")
if __name__ == "__main__":
print(getNTPTime())
Create a file, paste that code in, chmod +x it and fire it off.
To: @mattccrampton
0
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