def bind(domain_string, mydomain):
"""
Calculate and save in db the last assignment valid to short classic
Params
domain_s - a domain : string
mydomain - a domain who provide the service : string
Return
last assignament : string
"""
last_assignment = ''
query = db.Query(Domain).filter('name_domain = ', domain_string)
if query.count() != 0:
dt = query.fetch(1)[0]
last_assignment = dt.last_assignament
while True:
last_assignament = compute_next(last_assignment)
short = '/'.join( (mydomain, domain_string, last_assignament) )
if not functions.isAlredyCustum(short):
break
dt.last_assignament = last_assignament
db.put(dt)
return dt.last_assignament
def short(url, custom_string=None):
"""
Perform the shortening of given url. Optionally use a custom string
instead of using internal algorithm provided by core module
Params
url - the url to shorten: url
custom_string - the string to use to short the link: string
Return
shorted url: url string
"""
domain_name = parse_domain(url)
if is_blacklisted(domain_name):
raise DomainBlacklistedError(domain_name)
if custom_string and shorting_frag_already_exists(custom_string, False):
raise URLExistsError(custom_string)
domain = get_or_create_domain(domain_name)
urlbox = None
if custom_string:
urlbox = UrlBox()
urlbox.shorting_frag = custom_string
urlbox.custom = True
else:
urlbox = respawn_urlbox(domain)
if not urlbox:
urlbox = UrlBox()
short = compute_next(domain.last_shorting_frag_assigned)
while shorting_frag_already_exists(domain, short):
short = compute_next(short)
urlbox.shorting_frag = short
urlbox.custom = False
urlbox.domain = domain
urlbox.url = url
urlbox.put()
return urlbox.shorted_url
