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+--- Thread: Set Timezone (/showthread.php?tid=261)
Set Timezone - paul - 2021 Oct 07
Hi Dan:
I wrote this script (timezone.py) to set timezone within SIP (ie., without having to go through sudo raspi-config).
The script detects the ip-address of isp (external_ip), to determine its timezone id (e.g. Asia/Shanghai), and then set the timezone via the command line.
Running this script ("python3 /pi/home/SIP/timezone.py") will change the device time on SIP/template/base.html
To test, I switch the timezone between my isp ip-address and a dummy external_ip (external_ip = '64.233.191.255' is a google ip-address in Los Angelse)
#### begin of timezone.py #####
#!/bin/bash
# path: /home/pi/SIP/timezone.py
# references:
# https://www.raspberrypi.org/forums/viewtopic.php?t=197938
# https://stackoverflow.com/questions/63573061/how-to-get-location-of-server-based-on-ip-address-in-python
"""
change timezone via python script
"""
import json
import urllib.request
import subprocess
GEO_IP_API_URL = 'http://ip-api.com/json/'
external_ip = urllib.request.urlopen('https://ident.me').read().decode('utf8')
#external_ip = '64.233.191.255'
# Creating request object to GeoLocation API
req = urllib.request.Request(GEO_IP_API_URL+external_ip)
# Getting in response JSON
response = urllib.request.urlopen(req).read()
# Loading JSON from text to object
json_response = json.loads(response.decode('utf-8'))
# Print timezone
timezone = json_response['timezone']
print('timezone: {}'.format(timezone))
if __name__ == "__main__":
out = subprocess.run('sudo ln -fs /usr/share/zoneinfo/' + timezone + ' /etc/localtime', shell=True)
print(out)
out = subprocess.run('sudo dpkg-reconfigure -f noninteractive tzdata', shell=True)
print(out)
#### end of timezone.py #####
In the options page, I include a "Set timezone" button below the 24-hour clock checkbox. This addition shows up in 3 places in options.html page.
1a. In SIP/templates/options.html, I introduce a button id 'cSetTimezone' below the condition 'if name == "tf"'(so this button will appear to the right of 24-hour clock checkbox):
if datatype == "boolean":
output += "<input name='o" + name + "' type='checkbox' " + ("checked" if value>0 else "") + ">\n"
if name == "tf":
output += " <button id='cSetTimezone' title=" + json.dumps(_(u'Use only if device time is wrong; Use isp ip-address to correct'), ensure_ascii=False) + ">" + _(u'Set timezone')+"</button>"
1b. In the jQuery section, after jQuery("button#cRestart"), I include a corresponding jQuery("button#cSetTimezone"). The name='stz' is used further down in webpages.py.
jQuery("button#cRestart").click(function(){
jQuery("input[name='rstrt']").val(1);
jQuery("form[name='of']").submit();
});
jQuery("button#cSetTimezone").click(function(){
jQuery("input[name='stz']").val(1);
jQuery("form[name='of']").submit();
});
1c. Under the "hidden" section to hide the background checkbox, after the Restart checkbox (name='rstrt'), I hide the "stz" checkbox:
<input type="hidden" name="rstrt" value="0">
<input type="hidden" name="stz" value="0">
The button 'stz' requires a restart to update device time.
2. In SIP/webpages.py, I include a u"stz" (set timezone) section ala u"rstrt".
if u"rstrt" in qdict and qdict[u"rstrt"] == u"1":
restart(2)
raise web.seeother(u"/restart")
if u"stz" in qdict and qdict[u"stz"] == u"1":
report_timezone_set()
subprocess.run('sudo python3 /home/pi/SIP/timezone.py', shell=True)
restart(2)
raise web.seeother(u"/restart")
Paul
RE: Set Timezone - dan - 2021 Oct 07
Interesting.
Thanks for posting your code. I will give it a try.
Dan
RE: Set Timezone - paul - 2021 Oct 09
I think my above arrangement is not a good idea. Instead of a button which executes immediately when pressed, the set_timezone function should be implemented as a checkbox like the 24-hour clock format, to be executed after the submit button is clicked.
But unlike the 24-hour clock, the set_timezone checkbox should be left unchecked when the page loads every time, to avoid accidental execution in case user forgets to uncheck. This should be easier to implement.