django-cas-server/cas_server/utils.py

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# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License version 3 for
# more details.
#
# You should have received a copy of the GNU General Public License version 3
# along with this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# (c) 2015 Valentin Samir
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"""Some util function for the app"""
from . import default_settings
from django.conf import settings
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import urlparse
import urllib
import random
import string
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def update_url(url, params):
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"""update params in the `url` query string"""
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url_parts = list(urlparse.urlparse(url))
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query = dict(urlparse.parse_qsl(url_parts[4]))
query.update(params)
url_parts[4] = urllib.urlencode(query)
return urlparse.urlunparse(url_parts)
def unpack_nested_exception(error):
"""If exception are stacked, return the first one"""
i = 0
while True:
if error.args[i:]:
if isinstance(error.args[i], Exception):
error = error.args[i]
i = 0
else:
i += 1
else:
break
return error
def _gen_ticket(prefix):
"""Generate a ticket with prefix `prefix`"""
return '%s-%s' % (
prefix,
''.join(
random.choice(
string.ascii_letters + string.digits
) for _ in range(settings.CAS_ST_LEN)
)
)
def gen_st():
"""Generate a Service Ticket"""
return _gen_ticket('ST')
def gen_pt():
"""Generate a Proxy Ticket"""
return _gen_ticket('PT')
def gen_pgt():
"""Generate a Proxy Granting Ticket"""
return _gen_ticket('PGT')
def gen_pgtiou():
"""Generate a Proxy Granting Ticket IOU"""
return _gen_ticket('PGTIOU')