Downloader for NEXRAD GeoTIFF composites

nexrad_composites.py

from sys import exit, argv
import datetime, zipfile
import requests

def dlhook(r, *args, **kwargs):
	print('GET %s'%str(r.url))

base_url = "http://mesonet.agron.iastate.edu/request/gis/n0r2gtiff.php?dstr=%s"

def fetch(tme):
	tm = tme.strftime('%Y%m%d%H%M')
	url = base_url%tm
	req = requests.get(url, hooks=dict(response=dlhook))
	with open('%s.zip'%tm, 'w') as myzip:
		myzip.write(req.content)
	
def fetch_range(start, stop):
	while start < stop:
		fetch(start)
		start += datetime.timedelta(seconds=5*60)

if __name__ == '__main__':

	begin = datetime.datetime(2013, 1, 1)
	end = datetime.datetime(2013, 1, 2)
	fetch_range(begin, end)