Generate time based links for private bunches (nibbler.io).

gistfile1.py

import hmac
from hashlib import sha1
from time import time

NIBBLER_CUSTOMER_ID = 'xxx'
PRIVATE_BUNCH_NAME = 'xxx'
FILENAME = 'xxx'
LINK_EXPIRE_SECONDS = 60
NIBBLER_ACCESS_KEY = 'xxx'

expires = int(time() + LINK_EXPIRE_SECONDS)
path = "/v1/AUTH_{customer_id}/{bunch}/{filename}".format(
    customer_id=NIBBLER_CUSTOMER_ID,
    bunch=PRIVATE_BUNCH_NAME,
    filename=FILENAME,
)
hmac_body = "GET\n{expires}\n{path}".format(
    expires=expires,
    path=path,
)
signature = hmac.new(NIBBLER_ACCESS_KEY, hmac_body, sha1).hexdigest()
url = "https://almond.nibbler.io{path}?Signature={signature}&Expires={expires}".format(
    path=path,
    signature=signature,
    expires=expires,
)
print url