hd1/unitsWebapp

import json
import logging
import re
import subprocess

import web
urls = (
    '/([^/]+)/([^/]+)/([0-9]+)', 'Unit'
)

app = web.application(urls, globals())

class Unit:
    def GET(self, unit_from, unit_to, amount):
        arg1 = '{0} {1}'.format(amount, unit_from)
        arg2 = unit_to
        cmd = '/usr/bin/units'
        args = [cmd, arg1, arg2]
        logging.debug(args)
        output = subprocess.check_output(args)
        logging.debug(output)
        lines = output.split('\n')
        logging.debug(lines)
        line = lines[0]
        logging.debug(line)
        value = line[line.index('*')+2:]
        logging.debug('value is {0}'.format(value))
        logging.debug('{0} {1}'.format(value, unit_to))
        ret = {'Amout to convert': amount, 'Unit to convert': unit_from, 'Final Amount': value, 'Final Unit': unit_to}
        return json.dumps(ret)


if __name__ == "__main__":
    logging.basicConfig(level=logging.FATAL)
    app.run()