google_locate.py

from httplib import HTTP
import location
 
latitude = 0
longitude = 0
 
def doLookup(cellId, lac, host = "www.google.com", port = 80):
  from string import replace
  from struct import unpack
  page = "/glm/mmap"
  http = HTTP(host, port)
  result = None
  errorCode = 0
 
  content_type, body = encode_request(cellId, lac)
  http.putrequest('POST', page)
  http.putheader('Content-Type', content_type)
  http.putheader('Content-Length', str(len(body)))
  http.endheaders()
  http.send(body)
  errcode, errmsg, headers = http.getreply()
  result = http.file.read()
  # could need some modification to get the answer: here I just need
  # to get the 5 first characters
  if (errcode == 200):
    (a, b,errorCode, latitude, longitude, c, d, e) = unpack(">hBiiiiih",result)
    latitude = latitude / 1000000.0
    longitude = longitude / 1000000.0
  return latitude, longitude
 
def encode_request(cellId, lac):
  from struct import pack
  content_type = 'application/binary'
  body = pack('>hqh2sh13sh5sh3sBiiihiiiiii', 21, 0, 2, 'in', 13, "Nokia N95 8Gb", 5,"1.3.1", 3, "Web", 27, 0, 0, 3, 0, cellId, lac, 0, 0, 0, 0)
  return content_type, body
 
(mcc, mnc, lac, cellId) = location.gsm_location()
(latitude, longitude) = doLookup(cellId, lac, "www.google.com", 80)
print latitude
print longitude