Google translate client

translate.py

#!/usr/bin/python

"""
Google translate client

usage: python translate.py [-h] [-v] [-ua User-Agent] source_lang target_lang text

positional arguments:
  source_lang
  target_lang
  text

optional arguments:
  -h, --help            show this help message and exit
  -v, --verbose
  -ua User-Agent, --useragent User-Agent
                        default="Mozilla/5.0"

"""

import argparse
import re
import urllib
import urllib2

BASE_URL = 'https://translate.google.com/translate_a/single'
DEFAULT_UA = 'Mozilla/5.0'
WEB_URL = 'https://translate.google.com/#{source_lang}/{target_lang}/{text}'

parser = argparse.ArgumentParser(description='Google translate client')
parser.add_argument('source_lang')
parser.add_argument('target_lang')
parser.add_argument('text')
parser.add_argument('-v', '--verbose', action='store_true')
parser.add_argument('-ua', '--useragent',
                    default=DEFAULT_UA,
                    metavar='User-Agent',
                    help='default="%s"' % DEFAULT_UA)
args = parser.parse_args()

url = '%s?%s' % (BASE_URL, urllib.urlencode({'client': 'gtx',
                                             'sl': args.source_lang,
                                             'tl': args.target_lang,
                                             'dt': 't',
                                             'q': args.text}))
opener = urllib2.build_opener()
opener.addheaders = [('User-Agent', args.useragent)]
resp = opener.open(url)
raw_resp = resp.read()

result = re.match(r'\[\[\[(.*)\]\]', raw_resp).group(1).split(',')
result = re.sub(r'"', '', result[0])

if args.verbose:
    print 'result=%s' % result
    print 'url=%s' % url
    print 'user-agent=%s' % args.useragent
    print 'status=%s' % resp.getcode()
    print 'response=%s' % raw_resp
    print 'web=%s' % WEB_URL.format(source_lang=args.source_lang,
                                    target_lang=args.target_lang,
                                    text=urllib.quote(args.text))
else:
    print result