genspectrum

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
    genspectrum

    Generates a given number of spectrum blocks for sale.

    :copyright: (c) 2013 by Digital Bazaar
    :license: BSD, see LICENSE for more details.
'''

import sys, os.path, json, time, urllib2, datetime, random

def w3cdatetime(i):
    ''' Output datetime in RFC 3339 format that is also valid ISO 8601
        timestamp representation'''
    year, month, day, hour, minute, second, wday, jday, dst = time.gmtime(i)
    o = str(year)
    if (month, day, hour, minute, second) == (1, 1, 0, 0, 0): return o
    o = o + '-%2.2d' % month
    if (day, hour, minute, second) == (1, 0, 0, 0): return o
    o = o + '-%2.2d' % day
    if (hour, minute, second) == (0, 0, 0): return o
    o = o + 'T%2.2d:%2.2d' % (hour, minute)
    if second != 0:
        o = o + ':%2.2d' % second
    o = o + 'Z'
    return o

if __name__ == '__main__':
    if(len(sys.argv) < 2):
        print 'Usage:', sys.argv[0], 'number_of_spectrum_blocks'
        print '    Example:', sys.argv[0], '10'
        sys.exit(1)
    
    blocks = int(sys.argv[1])

    while blocks > 0:
        print 'Gen block', blocks
        block = {
          '@context': 'https://w3id.org/spectrum/v1',
          'centerFrequency': str(random.randrange(50000000, 850000000, 1000)),
          'occupiedBandwidth': str(random.randrange(1000000, 50000000, 1000)),
          'transmitPower': str(random.randrange(5, 80, 1)),
          'latitude': 37.2294 + random.uniform(-0.09, 0.09),
          'longitude': 80.4142 + random.uniform(-0.09, 0.09),
          'validFrom': w3cdatetime(time.time()),
          'validUntil': w3cdatetime(time.time() + 60*60*24)
        }
        req = urllib2.Request('http://localhost:5000/offers/', 
            json.dumps(block), {'Content-Type': 'application/ld+json'})
        f = urllib2.urlopen(req)
        response = f.read()
        f.close()
        blocks = blocks - 1