kallithea Changeset - b18f89d6d17f

Changeset - b18f89d6d17f

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Marcin Kuzminski - 15 years ago 2010-05-30 19:49:40
marcin@python-works.com

Adde draft for permissions systems, made all needed decorators, and checks. For future usage in the system.

7 files changed with 126 insertions and 30 deletions:

pylons_app/config/environment.py

pylons_app/controllers/users.py

pylons_app/lib/app_globals.py

pylons_app/lib/auth.py

pylons_app/lib/db_manage.py

pylons_app/model/db.py

pylons_app/templates/admin/admin.html

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pylons_app/config/environment.py

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 """Pylons environment configuration"""
 import logging
 import os
 from mako.lookup import TemplateLookup
 from pylons.configuration import PylonsConfig
 from pylons.error import handle_mako_error
 from pylons_app.config.routing import make_map
 from pylons_app.lib.auth import set_available_permissions
 from pylons_app.model import init_model
 from sqlalchemy import engine_from_config
 import logging
 import os
 import pylons_app.lib.app_globals as app_globals
 import pylons_app.lib.helpers
 from pylons_app.config.routing import make_map
 from pylons_app.model import init_model
 log = logging.getLogger(__name__)
@@ @@ -62,6 +63,7 @@ def load_environment(global_conf, app_co @@
     init_model(sa_engine_db1)
     set_available_permissions(config)
     # CONFIGURATION OPTIONS HERE (note: all config options will override
     # any Pylons config options)

pylons_app/controllers/users.py

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@@ @@ -4,7 +4,7 @@ from pylons import request, response, se @@
 from pylons.i18n.translation import _
 from pylons_app.lib import helpers as h
 from pylons.controllers.util import abort, redirect
 from pylons_app.lib.auth import LoginRequired
+from pylons_app.lib.auth import LoginRequired, CheckPermissionAll
 from pylons_app.lib.base import BaseController, render
 from pylons_app.model.db import User, UserLog
 from pylons_app.model.forms import UserForm
@@ @@ -26,7 +26,8 @@ class UsersController(BaseController): @@
         c.admin_user = session.get('admin_user')
         c.admin_username = session.get('admin_username')
         super(UsersController, self).__before__()
     def index(self, format='html'):
         """GET /users: All items in the collection"""
         # url('users')

pylons_app/lib/app_globals.py

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@@ @@ -22,3 +22,4 @@ class Globals(object): @@
         self.paths = self.baseui.configitems('paths')
         self.base_path = self.paths[0][1].replace('*', '')
         self.changeset_annotation_colors = {}
         self.available_permissions = None # propagated after init_model

pylons_app/lib/auth.py

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 from functools import wraps
 from pylons import session, url
+from pylons import session, url, app_globals as g
 from pylons.controllers.util import abort, redirect
 from pylons_app.model import meta
 from pylons_app.model.db import User
@@ @@ -47,7 +47,26 @@ class AuthUser(object): @@
     def __init__(self):
         pass
 def set_available_permissions(config):
     """
     This function will propagate pylons globals with all available defined
     permission given in db. We don't wannt to check each time from db for new
     permissions since adding a new permission also requires application restart
     ie. to decorate new views with the newly created permission
     @param config:
     """
     from pylons_app.model.meta import Session
     from pylons_app.model.db import Permission
     logging.info('getting information about all available permissions')
     sa = Session()
     all_perms = sa.query(Permission).all()
     config['pylons.app_globals'].available_permissions = [x.permission_name for x in all_perms]
 #===============================================================================
 # DECORATORS
 #===============================================================================
@@ @@ -73,3 +92,62 @@ class LoginRequired(object): @@
                 return redirect(url('login_home'))
         return _wrapper
 class PermsDecorator(object):
     def __init__(self, *perms):
         available_perms = g.available_permissions
         for perm in perms:
             if perm not in available_perms:
                 raise Exception("'%s' permission in not defined" % perm)
         self.required_perms = set(perms)
         self.user_perms = set([])#propagate this list from somewhere.
     def __call__(self, func):
         @wraps(func)
         def _wrapper(*args, **kwargs):
             logging.info('checking %s permissions %s for %s',
                self.__class__.__name__[-3:], self.required_perms, func.__name__)
             if self.check_permissions():
                 logging.info('Permission granted for %s', func.__name__)
                 return func(*args, **kwargs)
             else:
                 logging.warning('Permission denied for %s', func.__name__)
                 #redirect with forbidden ret code
                 return redirect(url('access_denied'), 403)
         return _wrapper
     def check_permissions(self):
         """
         Dummy function for overiding
         """
         raise Exception('You have to write this function in child class')
 class CheckPermissionAll(PermsDecorator):
     """
     Checks for access permission for all given predicates. All of them have to
     be meet in order to fulfill the request
     """
     def check_permissions(self):
         if self.required_perms.issubset(self.user_perms):
             return True
         return False
 class CheckPermissionAny(PermsDecorator):
     """
     Checks for access permission for any of given predicates. In order to
     fulfill the request any of predicates must be meet
     """
     def check_permissions(self):
         if self.required_perms.intersection(self.user_perms):
             return True
         return False

pylons_app/lib/db_manage.py

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 from os.path import dirname as dn, join as jn
 from pylons_app.lib.auth import get_crypt_password
 from pylons_app.model import init_model
 from pylons_app.model.db import User, Permission
 from pylons_app.model.meta import Session, Base
 from sqlalchemy.engine import create_engine
 import logging
 from os.path import dirname as dn
 from os.path import join as jn
 from sqlalchemy.engine import create_engine
 import os
 import sys
 ROOT = dn(dn(dn(os.path.realpath(__file__))))
 sys.path.append(ROOT)
 from pylons_app.model.db import User
 from pylons_app.model.meta import Session, Base
 from pylons_app.lib.auth import get_crypt_password
 from pylons_app.model import init_model
 log = logging.getLogger('db manage')
 log.setLevel(logging.DEBUG)
@@ @@ -68,9 +67,28 @@ class DbManage(object): @@
             self.sa.rollback()
             raise
     def create_permissions(self):
         perms = [('can_view_admin_users', 'Access to admin user view'),
+                 ]
         for p in perms:
             new_perm = Permission()
             new_perm.permission_name = p[0]
             new_perm.permission_longname = p[1]
             try:
                 self.sa.add(new_perm)
                 self.sa.commit()
             except:
                 self.sa.rollback()
                 raise
 if __name__ == '__main__':
     dbmanage = DbManage(log_sql=True)
     dbmanage.create_tables(override=True)
     dbmanage.admin_prompt()
     dbmanage.admin_prompt()
     dbmanage.create_permissions()

pylons_app/model/db.py

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@@ @@ -40,6 +40,7 @@ class Permission(Base): @@
     __table_args__ = {'useexisting':True}
     permission_id = Column("id", INTEGER(), nullable=False, unique=True, default=None, primary_key=1)
     permission_name = Column("permission_name", TEXT(length=None, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)
     permission_longname = Column("permission_longname", TEXT(length=None, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)
     def __repr__(self):
         return "<Permission('%s:%s')>" % (self.permission_id, self.permission_name)

pylons_app/templates/admin/admin.html

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@@ @@ -12,15 +12,10 @@ @@
 	${self.submenu('')}
 </%def>
 <%def name="main()">
     %if c.admin_user:
 	    <div>
 	        <h2>Welcome ${c.admin_username}</h2>
 			    <div id="user_log">
 					${c.log_data}
 				</div>
 	    </div>
     %else:
 		<h2>${_('Sorry only admin users can acces this area')}</h2>
     %endif
     <div>
         <h2>Welcome ${c.admin_username}</h2>
 		    <div id="user_log">
 				${c.log_data}
 			</div>
     </div>
 </%def>
@@ \ No newline at end of file @@

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