implementing loading backends

* fix conf file
* add exceptions
* fix modules skeletons

ldapcherry/__init__.py

@@ -87,6 +87,7 @@ class LdapCherry(object):
 
     def _init_backends(self, config):
         self.backends_params = {}
+        self.backends = {}
         for entry in config['backends']:
             # split at the first dot
             backend, sep, param = entry.partition('.')
@@ -94,6 +95,21 @@ class LdapCherry(object):
             if not backend in self.backends_params:
                 self.backends_params[backend] = {}
             self.backends_params[backend][param] = value
+        for backend in self.backends_params:
+            params = self.backends_params[backend]
+            # Loading the backend module
+            try:
+                module = params['module']
+            except:
+                raise MissingParameter('backends', backend + '.module')
+            try:
+                bc = __import__(module, globals(), locals(), ['Backend'], -1)
+            except:
+                raise BackendModuleLoadingFail(module) 
+            try:
+                self.backends[backend] = bc.Backend(params, cherrypy.log)
+            except:
+                raise BackendModuleInitFail(module)
 
     def _set_access_log(self, config, level):
         access_handler = self._get_param('global', 'log.access_handler', config, 'syslog')
@@ -209,11 +225,6 @@ class LdapCherry(object):
             self.temp_error = self.temp_lookup.get_template('error.tmpl')
             self.temp_login = self.temp_lookup.get_template('login.tmpl')
 
-            # loading the authentification module
-            #auth_module = self._get_param('auth', 'auth.module', config)
-            #auth = __import__(auth_module, globals(), locals(), ['Auth'], -1)
-            #self.auth = auth.Auth(config['auth'], cherrypy.log)
-
 
             self.roles_file = self._get_param('roles', 'roles.file', config)
             cherrypy.log.error(

ldapcherry/backend/ldap.py

@@ -5,6 +5,8 @@
 # LdapCherry
 # Copyright (c) 2014 Carpentier Pierre-Francois
 
+import ldapcherry.backend
+
 class Backend(ldapcherry.backend.Backend):
 
     def __init__(self, config, logger):

ldapcherry/backend/samba4.py

@@ -5,3 +5,9 @@
 # LdapCherry
 # Copyright (c) 2014 Carpentier Pierre-Francois
 
+import ldapcherry.backend
+
+class Backend(ldapcherry.backend.Backend):
+
+    def __init__(self, config, logger):
+        pass

ldapcherry/exceptions.py

@@ -54,6 +54,16 @@ class MissingAttributesFile(Exception):
         self.attributesfile = attributesfile
         self.log = "fail to open attributes file <%(attributesfile)s>" % { 'attributesfile' : attributesfile}
 
+class BackendModuleLoadingFail(Exception):
+    def __init__(self, module):
+        self.module = module
+        self.log = "fail to load module <%(module)s>" % {'module': module}
+
+class BackendModuleInitFail(Exception):
+    def __init__(self, module):
+        self.module = module
+        self.log = "fail to init module <%(module)s>" % {'module': module}
+
 class WrongAttributeType(Exception):
     def __init__(self, key, section, ymlfile):
         self.key = key