#!/usr/bin/env python3
"""CGI script to print the current date and time in various time zones.
The time zones that you want to generate are stored in "zones", which
is a list of tuples of (1) an arbitrary label for the zone and (2) the
value that the operating system expects for its environment variable TZ.
"""
__version__ = 'v1.4'
__initialdate__ = 'January 2006'
__author__ = 'Darren Paul Griffith, https://www.madphilosopher.ca/'
# The following is the list of time zone labels and their respective
# value for the environment variable TZ:
#
# ("Label", "TZ value")
#
# The label can be anything. For the environment variable,
# use the filenames found in the directory:
#
# /usr/share/zoneinfo
#
# in Linux or FreeBSD.
#
ZONELIST = []
ZONELIST.append(("Vancouver", "PST8PDT"))
ZONELIST.append(("Edmonton", "MST7MDT"))
ZONELIST.append(("Sask.", "Canada/Saskatchewan"))
ZONELIST.append(("Ottawa", "EST5EDT"))
ZONELIST.append(("Halifax", "AST4ADT"))
ZONELIST.append(("St. John's", "America/St_Johns"))
ZONELIST.append(("UTC", "UTC"))
ZONELIST.append(("Berlin", "Europe/Berlin"))
ZONELIST.append(("Beijing", "Asia/Shanghai"))
ZONELIST.append(("Singapore", "Asia/Singapore"))
ZONELIST.append(("Canberra", "Australia/Canberra"))
# The beginning of the output for the cgi script,
# including the all important first line (Content-type)
# and second blank line.
HEAD="""Content-type: text/html
Mad Philosopher Date and Time
| Zone |
Time |
"""
# The final output of the script, to finish off the html.
TAIL="""
See the source code.
"""
if __name__ == '__main__':
import os
print(HEAD)
for label,zone in ZONELIST:
command = f"TZ={zone} date" # pass the environment variable and the date command to the Unix shell
f = os.popen(command)
command_output = f.read().strip()
outstring = f" | {label} | {command_output} |
"
print(outstring)
f.close()
print(TAIL)