flic.krショートURLのIDからサムネイル取得

flickrThumb.py

class FlickrApi:

    def b58decode(self, s):
        alphabet = '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ'
        num = len(s)
        decoded = 0
        multi = 1
        for i in reversed(range(0, num)):
            decoded = decoded + multi * ( alphabet.index( s[i] ) )
            multi = multi * len(alphabet)
        return decoded


    def flickrApi(self, photo_id, flickr_api_key):
        dec_photo_id = self.b58decode(photo_id)
        uri = 'http://www.flickr.com/services/rest?method=flickr.photos.getInfo&format=json&api_key=%s&photo_id=%s' % (flickr_api_key, dec_photo_id)
        print uri

        f = urllib2.urlopen(uri).read()
        farm = re.search('"farm":([0-9])', f).group(1)
        server = re.search('"server":"([0-9]+)"', f).group(1)
        my_id = re.search('"id":"([0-9]+)"', f).group(1)
        secret = re.search('"secret":"([0-9a-z]+)"', f).group(1)

        res = 'http://farm%s.static.flickr.com/%s/%s_%s.jpg' % (farm, server, my_id, secret)

        return res