import urllib2

base_url = "http://10.111.0."

def get_url(id, cmd = '', data_dict = {}):
    if len(data_dict) == 0:
        return "{0}{1}/{2}".format(base_url, id, cmd)

    data_fmt = '&'.join(["{0}={1}".format(k, data_dict[k]) for k in data_dict])
    return "{0}{1}/{2}?{3}".format(base_url, id, cmd, data_fmt)

def read_url(id, cmd = '', data_dict = {}):
    url = get_url(id, cmd, data_dict)
    print url
    return urllib2.urlopen(url).read()

def parse_info(info):
    return {pair.split('=')[0] : pair.split('=')[1] for pair in info.split(' ')}

try:
    info = read_url(5, 'info')
    info_dict = parse_info(info)
    print info_dict
    print read_url(5, 'dim', {
        'time' : info_dict['time'],
        'data' : 'bla',
        'signature' : 'AAA'.encode('base64').rstrip('\n')
        })
except urllib2.HTTPError as ex:
    print ex.fp.read()