root / snf-common / synnefo / lib / astakos.py @ 1a736ca8
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import logging |
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from urlparse import urlparse |
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from urllib import unquote |
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from django.utils import simplejson as json |
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from objpool.http import PooledHTTPConnection |
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logger = logging.getLogger(__name__) |
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def retry(howmany): |
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def execute(func): |
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def f(*args, **kwargs): |
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attempts = 0
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while True: |
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try:
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return func(*args, **kwargs)
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except Exception, e: |
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is_last_attempt = attempts == howmany - 1
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if is_last_attempt:
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raise e
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if e.args:
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status = e.args[-1]
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# In case of Unauthorized response
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# or Not Found return directly
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if status == 401 or status == 404: |
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raise e
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attempts += 1
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return f
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return execute
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def call(token, url, headers=None, body=None, method='GET'): |
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p = urlparse(url) |
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kwargs = {} |
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if headers is None: |
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headers = {} |
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kwargs["headers"] = headers
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kwargs['headers']['X-Auth-Token'] = token |
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if body:
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kwargs['body'] = body
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kwargs['headers'].setdefault('content-type', |
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'application/octet-stream')
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kwargs['headers'].setdefault('content-length', len(body) if body else 0) |
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with PooledHTTPConnection(p.netloc, p.scheme) as conn: |
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conn.request(method, p.path + '?' + p.query, **kwargs)
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response = conn.getresponse() |
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headers = response.getheaders() |
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headers = dict((unquote(h), unquote(v)) for h, v in headers) |
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length = response.getheader('content-length', None) |
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data = response.read(length) |
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status = int(response.status)
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if status < 200 or status >= 300: |
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raise Exception(data, status) |
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return json.loads(data)
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def authenticate( |
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token, authentication_url='http://127.0.0.1:8000/im/authenticate',
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usage=False):
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if usage:
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authentication_url += "?usage=1"
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return call(token, authentication_url)
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@retry(3) |
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def get_displaynames( |
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token, |
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uuids, |
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url='http://127.0.0.1:8000/user_catalogs',
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override_users={}): |
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if override_users:
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return dict((u, u) for u in uuids) |
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try:
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data = call( |
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token, url, headers={'content-type': 'application/json'}, |
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body=json.dumps({'uuids': uuids}), method='POST') |
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except:
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raise
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else:
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return data.get('uuid_catalog') |
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@retry(3) |
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def get_uuids( |
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token, |
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displaynames, |
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url='http://127.0.0.1:8000/user_catalogs',
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override_users={}): |
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if override_users:
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return dict((u, u) for u in displaynames) |
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try:
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data = call( |
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token, url, headers={'content-type': 'application/json'}, |
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body=json.dumps({'displaynames': displaynames}), method='POST') |
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except:
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raise
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else:
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return data.get('displayname_catalog') |
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def get_user_uuid( |
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token, |
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displayname, |
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url='http://127.0.0.1:8000/user_catalogs',
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override_users={}): |
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if not displayname: |
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return
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displayname_dict = get_uuids(token, [displayname], url, override_users) |
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return displayname_dict.get(displayname)
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def get_displayname( |
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token, |
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uuid, |
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url='http://127.0.0.1:8000/user_catalogs',
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override_users={}): |
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if not uuid: |
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return
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uuid_dict = get_displaynames(token, [uuid], url, override_users) |
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return uuid_dict.get(uuid)
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def user_for_token(token, authentication_url, usage=False): |
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if not token: |
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return None |
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try:
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return authenticate(token, authentication_url, usage=usage)
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except Exception, e: |
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# In case of Unauthorized response return None
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if e.args and e.args[-1] == 401: |
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return None |
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raise e
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def get_user( |
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request, |
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authentication_url='http://127.0.0.1:8000/im/authenticate',
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fallback_token=None,
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usage=False):
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request.user = None
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request.user_uniq = None
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# Try to find token in a parameter or in a request header.
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user = user_for_token( |
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request.GET.get('X-Auth-Token'), authentication_url,
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usage=usage) |
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if not user: |
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user = user_for_token( |
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request.META.get('HTTP_X_AUTH_TOKEN'),
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authentication_url, |
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usage=usage) |
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if not user: |
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user = user_for_token(fallback_token, authentication_url, usage=usage) |
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if not user: |
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logger.warning("Cannot retrieve user details from %s",
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authentication_url) |
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return None |
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# use user uuid, instead of email, keep email/displayname reference
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# to user_id
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request.user_uniq = user['uuid']
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request.user = user |
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request.user_id = user.get('displayname')
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return user
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def get_token_from_cookie(request, cookiename): |
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"""
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Extract token from the cookie name provided. Cookie should be in the same
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form as astakos service sets its cookie contents::
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<user_uniq>|<user_token>
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"""
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try:
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cookie_content = unquote(request.COOKIES.get(cookiename, None))
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return cookie_content.split("|")[1] |
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except AttributeError: |
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pass
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return None |
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class UserCache(object): |
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"""uuid<->displayname user 'cache'"""
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def __init__(self, astakos_url, astakos_token, split=100): |
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self.astakos_token = astakos_token
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self.astakos_url = astakos_url
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self.user_catalog_url = astakos_url.replace("im/authenticate", |
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"service/api/user_catalogs")
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self.users = {}
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self.split = split
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assert(self.split > 0), "split must be positive" |
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def fetch_names(self, uuid_list): |
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total = len(uuid_list)
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split = self.split
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for start in range(0, total, split): |
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end = start + split |
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try:
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names = get_displaynames(token=self.astakos_token,
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url=self.user_catalog_url,
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uuids=uuid_list[start:end]) |
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self.users.update(names)
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except Exception as e: |
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logger.error("Failed to fetch names: %s", e)
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def get_uuid(self, name): |
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if not name in self.users: |
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try:
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self.users[name] = get_user_uuid(token=self.astakos_token, |
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url=self.user_catalog_url,
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displayname=name) |
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except Exception as e: |
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logger.error("Can not get uuid for name %s: %s", name, e)
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self.users[name] = name
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return self.users[name] |
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def get_name(self, uuid): |
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"""Do the uuid-to-email resolving"""
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if not uuid in self.users: |
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try:
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self.users[uuid] = get_displayname(token=self.astakos_token, |
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url=self.user_catalog_url,
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uuid=uuid) |
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except Exception as e: |
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logging.error("Can not get display name for uuid %s: %s",
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uuid, e) |
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self.users[uuid] = "-" |
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return self.users[uuid] |