download_mysticker_bruteforce.py

import urllib
from time import sleep

url_template = "https://m.mypeople.daum.net/img/i1.daumcdn.net/air21.sticker/pc/still_img/sticker_%03d.png"
start_range=0
end_range=1500      # 2013/08/14 last id : 1457
sleep_for_crawl_success = 1
sleep_for_crawl_fail = 2

for sticker_id in range(start_range, end_range+1):
    url = url_template % sticker_id
    filename = url.split('/')[-1]
    success = False

    print "about to download %s -> %s" % (url, filename)

    try:
        http = urllib.urlopen(url)

        if http.getcode() != 200:
            print "status code is not 200"
        elif not http.headers.has_key('content-type') or http.headers.get('content-type') != "image/png":
            print "content-type not found or not image/png"
        else:
            with open(filename, 'w') as fw:
                fw.write(http.read())

            success = True

    except:
        print "cannot download %s" % url
    finally:
        if success:
            sleep(sleep_for_crawl_success)
        else:
            sleep(sleep_for_crawl_fail)


print "end process..."