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def _build_js ( inputs , outputs , name , implementation , support_code ) : input_fields = json . dumps ( [ f [ 0 ] for f in inputs ] ) output_fields = [ { 'name' : f [ 0 ] , 'type' : f [ 1 ] } for f in outputs ] output_fields = json . dumps ( output_fields , sort_keys = True ) if support_code is None : support_code = ...
Creates a BigQuery SQL UDF javascript object .
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def sampling_query ( sql , fields = None , count = 5 , sampling = None ) : if sampling is None : sampling = Sampling . default ( count = count , fields = fields ) return sampling ( sql )
Returns a sampling query for the SQL object .
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def _remove_nonascii ( self , df ) : df_copy = df . copy ( deep = True ) for col in df_copy . columns : if ( df_copy [ col ] . dtype == np . dtype ( 'O' ) ) : df_copy [ col ] = df [ col ] . apply ( lambda x : re . sub ( r'[^\x00-\x7f]' , r'' , x ) if isinstance ( x , six . string_types ) else x ) return df_copy
Make copy and remove non - ascii characters from it .
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def plot ( self , data ) : import IPython if not isinstance ( data , dict ) or not all ( isinstance ( v , pd . DataFrame ) for v in data . values ( ) ) : raise ValueError ( 'Expect a dictionary where the values are all dataframes.' ) gfsg = GenericFeatureStatisticsGenerator ( ) data = [ { 'name' : k , 'table' : self . ...
Plots an overview in a list of dataframes
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def plot ( self , data , height = 1000 , render_large_data = False ) : import IPython if not isinstance ( data , pd . DataFrame ) : raise ValueError ( 'Expect a DataFrame.' ) if ( len ( data ) > 10000 and not render_large_data ) : raise ValueError ( 'Facets dive may not work well with more than 10000 rows. ' + 'Reduce ...
Plots a detail view of data .
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def DtypeToType ( self , dtype ) : if dtype . char in np . typecodes [ 'AllFloat' ] : return self . fs_proto . FLOAT elif ( dtype . char in np . typecodes [ 'AllInteger' ] or dtype == np . bool or np . issubdtype ( dtype , np . datetime64 ) or np . issubdtype ( dtype , np . timedelta64 ) ) : return self . fs_proto . IN...
Converts a Numpy dtype to the FeatureNameStatistics . Type proto enum .
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def NdarrayToEntry ( self , x ) : row_counts = [ ] for row in x : try : rc = np . count_nonzero ( ~ np . isnan ( row ) ) if rc != 0 : row_counts . append ( rc ) except TypeError : try : row_counts . append ( row . size ) except AttributeError : row_counts . append ( 1 ) data_type = self . DtypeToType ( x . dtype ) conv...
Converts an ndarray to the Entry format .
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def serving_from_csv_input ( train_config , args , keep_target ) : examples = tf . placeholder ( dtype = tf . string , shape = ( None , ) , name = 'csv_input_string' ) features = parse_example_tensor ( examples = examples , train_config = train_config , keep_target = keep_target ) if keep_target : target = features . p...
Read the input features from a placeholder csv string tensor .
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def parse_example_tensor ( examples , train_config , keep_target ) : csv_header = [ ] if keep_target : csv_header = train_config [ 'csv_header' ] else : csv_header = [ name for name in train_config [ 'csv_header' ] if name != train_config [ 'target_column' ] ] record_defaults = [ [ train_config [ 'csv_defaults' ] [ nam...
Read the csv files .
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def get_estimator ( output_dir , train_config , args ) : target_name = train_config [ 'target_column' ] if is_classification_model ( args . model_type ) and target_name not in train_config [ 'categorical_columns' ] : raise ValueError ( 'When using a classification model, the target must be a ' 'categorical variable.' )...
Returns a tf learn estimator .
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def preprocess_input ( features , target , train_config , preprocess_output_dir , model_type ) : target_name = train_config [ 'target_column' ] key_name = train_config [ 'key_column' ] with tf . name_scope ( 'numerical_feature_preprocess' ) : if train_config [ 'numerical_columns' ] : numerical_analysis_file = os . path...
Perform some transformations after reading in the input tensors .
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def _scale_tensor ( tensor , range_min , range_max , scale_min , scale_max ) : if range_min == range_max : return tensor float_tensor = tf . to_float ( tensor ) scaled_tensor = tf . divide ( ( tf . subtract ( float_tensor , range_min ) * tf . constant ( float ( scale_max - scale_min ) ) ) , tf . constant ( float ( rang...
Scale a tensor to scale_min to scale_max .
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def _tflearn_features ( train_config , args ) : feature_columns = [ ] target_name = train_config [ 'target_column' ] key_name = train_config [ 'key_column' ] for name in train_config [ 'numerical_columns' ] : if name != target_name and name != key_name : feature_columns . append ( tf . contrib . layers . real_valued_co...
Builds the tf . learn feature list .
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def get_vocabulary ( preprocess_output_dir , name ) : vocab_file = os . path . join ( preprocess_output_dir , CATEGORICAL_ANALYSIS % name ) if not file_io . file_exists ( vocab_file ) : raise ValueError ( 'File %s not found in %s' % ( CATEGORICAL_ANALYSIS % name , preprocess_output_dir ) ) labels = python_portable_stri...
Loads the vocabulary file as a list of strings .
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def validate_metadata ( train_config ) : if len ( train_config [ 'csv_header' ] ) != len ( train_config [ 'csv_defaults' ] ) : raise ValueError ( 'Unequal number of columns in input features file and ' 'schema file.' ) sorted_columns = sorted ( train_config [ 'csv_header' ] + [ train_config [ 'target_column' ] ] ) sort...
Perform some checks that the trainig config is correct .
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def get_default_id ( credentials = None ) : project_id = _utils . get_project_id ( ) if project_id is None : projects , _ = Projects ( credentials ) . _retrieve_projects ( None , 2 ) if len ( projects ) == 1 : project_id = projects [ 0 ] . id return project_id
Get default project id .
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def init_app ( state ) : app = state . app app . config . setdefault ( 'SPLIT_ALLOW_MULTIPLE_EXPERIMENTS' , False ) app . config . setdefault ( 'SPLIT_DB_FAILOVER' , False ) app . config . setdefault ( 'SPLIT_IGNORE_IP_ADDRESSES' , [ ] ) app . config . setdefault ( 'SPLIT_ROBOT_REGEX' , r ) app . jinja_env . globals . ...
Prepare the Flask application for Flask - Split .
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def finished ( experiment_name , reset = True ) : if _exclude_visitor ( ) : return redis = _get_redis_connection ( ) try : experiment = Experiment . find ( redis , experiment_name ) if not experiment : return alternative_name = _get_session ( ) . get ( experiment . key ) if alternative_name : split_finished = set ( ses...
Track a conversion .
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def _is_robot ( ) : robot_regex = current_app . config [ 'SPLIT_ROBOT_REGEX' ] user_agent = request . headers . get ( 'User-Agent' , '' ) return re . search ( robot_regex , user_agent , flags = re . VERBOSE )
Return True if the current visitor is a robot or spider or False otherwise .
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def start_time ( self ) : t = self . redis . hget ( 'experiment_start_times' , self . name ) if t : return datetime . strptime ( t , '%Y-%m-%dT%H:%M:%S' )
The start time of this experiment .
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def reset ( self ) : for alternative in self . alternatives : alternative . reset ( ) self . reset_winner ( ) self . increment_version ( )
Delete all data for this experiment .
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def delete ( self ) : for alternative in self . alternatives : alternative . delete ( ) self . reset_winner ( ) self . redis . srem ( 'experiments' , self . name ) self . redis . delete ( self . name ) self . increment_version ( )
Delete this experiment and all its data .
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def _get_redis_connection ( ) : url = current_app . config . get ( 'REDIS_URL' , 'redis://localhost:6379' ) return redis . from_url ( url , decode_responses = True )
Return a Redis connection based on the Flask application s configuration .
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def set_experiment_winner ( experiment ) : redis = _get_redis_connection ( ) experiment = Experiment . find ( redis , experiment ) if experiment : alternative_name = request . form . get ( 'alternative' ) alternative = Alternative ( redis , alternative_name , experiment . name ) if alternative . name in experiment . al...
Mark an alternative as the winner of the experiment .
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def reset_experiment ( experiment ) : redis = _get_redis_connection ( ) experiment = Experiment . find ( redis , experiment ) if experiment : experiment . reset ( ) return redirect ( url_for ( '.index' ) )
Delete all data for an experiment .
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def delete_experiment ( experiment ) : redis = _get_redis_connection ( ) experiment = Experiment . find ( redis , experiment ) if experiment : experiment . delete ( ) return redirect ( url_for ( '.index' ) )
Delete an experiment and all its data .
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def _get_ipaddress ( node ) : if "ipaddress" not in node : with settings ( hide ( 'stdout' ) , warn_only = True ) : output = sudo ( 'ohai -l warn ipaddress' ) if output . succeeded : try : node [ 'ipaddress' ] = json . loads ( output ) [ 0 ] except ValueError : abort ( "Could not parse ohai's output for ipaddress" ":\n...
Adds the ipaddress attribute to the given node object if not already present and it is correctly given by ohai Returns True if ipaddress is added False otherwise
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def sync_node ( node ) : if node . get ( 'dummy' ) or 'dummy' in node . get ( 'tags' , [ ] ) : lib . print_header ( "Skipping dummy: {0}" . format ( env . host ) ) return False current_node = lib . get_node ( node [ 'name' ] ) solo . configure ( current_node ) ipaddress = _get_ipaddress ( node ) filepath = save_config ...
Builds synchronizes and configures a node . It also injects the ipaddress to the node s config file if not already existent .
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def build_dct ( dic , keys , value ) : key = keys . pop ( 0 ) if len ( keys ) : dic . setdefault ( key , { } ) build_dct ( dic [ key ] , keys , value ) else : if value == "false" : value = False elif value == "true" : value = True dic [ key ] = deepcopy ( value )
Builds a dictionary with arbitrary depth out of a key list
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def update_dct ( dic1 , dic2 ) : for key , val in dic2 . items ( ) : if isinstance ( val , dict ) : dic1 . setdefault ( key , { } ) update_dct ( dic1 [ key ] , val ) else : dic1 [ key ] = val
Merges two dictionaries recursively dic2 will have preference over dic1
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def _add_merged_attributes ( node , all_recipes , all_roles ) : attributes = { } for recipe in node [ 'recipes' ] : found = False for r in all_recipes : if recipe == r [ 'name' ] : found = True for attr in r [ 'attributes' ] : if r [ 'attributes' ] [ attr ] . get ( 'type' ) == "hash" : value = { } else : value = r [ 'a...
Merges attributes from cookbooks node and roles
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def build_node_data_bag ( ) : nodes = lib . get_nodes ( ) node_data_bag_path = os . path . join ( 'data_bags' , 'node' ) remove_local_node_data_bag ( ) os . makedirs ( node_data_bag_path ) all_recipes = lib . get_recipes ( ) all_roles = lib . get_roles ( ) for node in nodes : node [ 'id' ] = node [ 'name' ] . replace (...
Builds one node data bag item per file found in the nodes directory
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def remove_local_node_data_bag ( ) : node_data_bag_path = os . path . join ( 'data_bags' , 'node' ) if os . path . exists ( node_data_bag_path ) : shutil . rmtree ( node_data_bag_path )
Removes generated node data_bag locally
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def ensure_berksfile_cookbooks_are_installed ( ) : msg = "Vendoring cookbooks from Berksfile {0} to directory {1}..." print ( msg . format ( env . berksfile , env . berksfile_cookbooks_directory ) ) run_vendor = True cookbooks_dir = env . berksfile_cookbooks_directory berksfile_lock_path = cookbooks_dir + '/Berksfile.l...
Run berks vendor to berksfile cookbooks directory
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def _remove_remote_node_data_bag ( ) : node_data_bag_path = os . path . join ( env . node_work_path , 'data_bags' , 'node' ) if exists ( node_data_bag_path ) : sudo ( "rm -rf {0}" . format ( node_data_bag_path ) )
Removes generated node data_bag from the remote node
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def _remove_remote_data_bags ( ) : data_bags_path = os . path . join ( env . node_work_path , 'data_bags' ) if exists ( data_bags_path ) : sudo ( "rm -rf {0}" . format ( data_bags_path ) )
Remove remote data bags so it won t leak any sensitive information
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def _configure_node ( ) : print ( "" ) msg = "Cooking..." if env . parallel : msg = "[{0}]: {1}" . format ( env . host_string , msg ) print ( msg ) with settings ( hide ( 'stdout' , 'warnings' , 'running' ) , warn_only = True ) : sudo ( "mv {0} {0}.1" . format ( LOGFILE ) ) cmd = "RUBYOPT=-Ku chef-solo" if whyrun : cmd...
Exectutes chef - solo to apply roles and recipes to a node
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def _resolve_hostname ( name ) : if env . ssh_config is None : return name elif not os . path . exists ( os . path . join ( "nodes" , name + ".json" ) ) : resolved_name = env . ssh_config . lookup ( name ) [ 'hostname' ] if os . path . exists ( os . path . join ( "nodes" , resolved_name + ".json" ) ) : name = resolved_...
Returns resolved hostname using the ssh config
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def get_environment ( name ) : if name == "_default" : return env_from_template ( name ) filename = os . path . join ( "environments" , name + ".json" ) try : with open ( filename ) as f : try : return json . loads ( f . read ( ) ) except ValueError as e : msg = 'LittleChef found the following error in' msg += ' "{0}":...
Returns a JSON environment file as a dictionary
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def get_environments ( ) : envs = [ ] for root , subfolders , files in os . walk ( 'environments' ) : for filename in files : if filename . endswith ( ".json" ) : path = os . path . join ( root [ len ( 'environments' ) : ] , filename [ : - len ( '.json' ) ] ) envs . append ( get_environment ( path ) ) return sorted ( e...
Gets all environments found in the environments directory
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def get_node ( name , merged = False ) : if merged : node_path = os . path . join ( "data_bags" , "node" , name . replace ( '.' , '_' ) + ".json" ) else : node_path = os . path . join ( "nodes" , name + ".json" ) if os . path . exists ( node_path ) : with open ( node_path , 'r' ) as f : try : node = json . loads ( f . ...
Returns a JSON node file as a dictionary
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def get_nodes_with_role ( role_name , environment = None ) : prefix_search = role_name . endswith ( "*" ) if prefix_search : role_name = role_name . rstrip ( "*" ) for n in get_nodes ( environment ) : roles = get_roles_in_node ( n , recursive = True ) if prefix_search : if any ( role . startswith ( role_name ) for role...
Get all nodes which include a given role prefix - searches are also supported
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def get_nodes_with_tag ( tag , environment = None , include_guests = False ) : nodes = get_nodes ( environment ) nodes_mapping = dict ( ( n [ 'name' ] , n ) for n in nodes ) for n in nodes : if tag in n . get ( 'tags' , [ ] ) : try : del nodes_mapping [ n [ 'fqdn' ] ] except KeyError : pass yield n if include_guests an...
Get all nodes which include a given tag
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def get_nodes_with_recipe ( recipe_name , environment = None ) : prefix_search = recipe_name . endswith ( "*" ) if prefix_search : recipe_name = recipe_name . rstrip ( "*" ) for n in get_nodes ( environment ) : recipes = get_recipes_in_node ( n ) for role in get_roles_in_node ( n , recursive = True ) : recipes . extend...
Get all nodes which include a given recipe prefix - searches are also supported
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def print_node ( node , detailed = False ) : nodename = node [ 'name' ] print ( colors . yellow ( "\n" + nodename ) ) if detailed : for role in get_roles_in_node ( node ) : print_role ( _get_role ( role ) , detailed = False ) else : print ( ' Roles: {0}' . format ( ", " . join ( get_roles_in_node ( node ) ) ) ) if det...
Pretty prints the given node
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def print_nodes ( nodes , detailed = False ) : found = 0 for node in nodes : found += 1 print_node ( node , detailed = detailed ) print ( "\nFound {0} node{1}" . format ( found , "s" if found != 1 else "" ) )
Prints all the given nodes
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def _generate_metadata ( path , cookbook_path , name ) : global knife_installed if not knife_installed : return metadata_path_rb = os . path . join ( path , 'metadata.rb' ) metadata_path_json = os . path . join ( path , 'metadata.json' ) if ( os . path . exists ( metadata_path_rb ) and ( not os . path . exists ( metada...
Checks whether metadata . rb has changed and regenerate metadata . json
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def get_recipes_in_cookbook ( name ) : recipes = { } path = None cookbook_exists = False metadata_exists = False for cookbook_path in cookbook_paths : path = os . path . join ( cookbook_path , name ) path_exists = os . path . exists ( path ) cookbook_exists = cookbook_exists or path_exists if not path_exists : continue...
Gets the name of all recipes present in a cookbook Returns a list of dictionaries
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def get_recipes_in_node ( node ) : recipes = [ ] for elem in node . get ( 'run_list' , [ ] ) : if elem . startswith ( "recipe" ) : recipe = elem . split ( '[' ) [ 1 ] . split ( ']' ) [ 0 ] recipes . append ( recipe ) return recipes
Gets the name of all recipes present in the run_list of a node
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def get_recipes ( ) : dirnames = set ( ) for path in cookbook_paths : dirnames . update ( [ d for d in os . listdir ( path ) if os . path . isdir ( os . path . join ( path , d ) ) and not d . startswith ( '.' ) ] ) recipes = [ ] for dirname in dirnames : recipes . extend ( get_recipes_in_cookbook ( dirname ) ) return s...
Gets all recipes found in the cookbook directories
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def print_recipe ( recipe ) : print ( colors . yellow ( "\n{0}" . format ( recipe [ 'name' ] ) ) ) print " description: {0}" . format ( recipe [ 'description' ] ) print " version: {0}" . format ( recipe [ 'version' ] ) print " dependencies: {0}" . format ( ", " . join ( recipe [ 'dependencies' ] ) ) print " a...
Pretty prints the given recipe
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def _get_role ( rolename ) : path = os . path . join ( 'roles' , rolename + '.json' ) if not os . path . exists ( path ) : abort ( "Couldn't read role file {0}" . format ( path ) ) with open ( path , 'r' ) as f : try : role = json . loads ( f . read ( ) ) except ValueError as e : msg = "Little Chef found the following ...
Reads and parses a file containing a role
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def get_roles ( ) : roles = [ ] for root , subfolders , files in os . walk ( 'roles' ) : for filename in files : if filename . endswith ( ".json" ) : path = os . path . join ( root [ len ( 'roles' ) : ] , filename [ : - len ( '.json' ) ] ) roles . append ( _get_role ( path ) ) return sorted ( roles , key = lambda x : x...
Gets all roles found in the roles directory
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def print_role ( role , detailed = True ) : if detailed : print ( colors . yellow ( role . get ( 'fullname' ) ) ) else : print ( " Role: {0}" . format ( role . get ( 'fullname' ) ) ) if detailed : print ( " description: {0}" . format ( role . get ( 'description' ) ) ) if 'default_attributes' in role : print ( " ...
Pretty prints the given role
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def import_plugin ( name ) : path = os . path . join ( "plugins" , name + ".py" ) try : with open ( path , 'rb' ) as f : try : plugin = imp . load_module ( "p_" + name , f , name + '.py' , ( '.py' , 'rb' , imp . PY_SOURCE ) ) except SyntaxError as e : error = "Found plugin '{0}', but it seems" . format ( name ) error +...
Imports plugin python module
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def get_cookbook_path ( cookbook_name ) : for cookbook_path in cookbook_paths : path = os . path . join ( cookbook_path , cookbook_name ) if os . path . exists ( path ) : return path raise IOError ( 'Can\'t find cookbook with name "{0}"' . format ( cookbook_name ) )
Returns path to the cookbook for the given cookbook name
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def global_confirm ( question , default = True ) : if env . abort_on_prompts : return True original_parallel = env . parallel env . parallel = False result = confirm ( question , default ) env . parallel = original_parallel return result
Shows a confirmation that applies to all hosts by temporarily disabling parallel execution in Fabric
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def _pprint ( dic ) : for key , value in dic . items ( ) : print ( " {0}: {1}" . format ( key , value ) )
Prints a dictionary with one indentation level
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def get_margin ( length ) : if length > 23 : margin_left = "\t" chars = 1 elif length > 15 : margin_left = "\t\t" chars = 2 elif length > 7 : margin_left = "\t\t\t" chars = 3 else : margin_left = "\t\t\t\t" chars = 4 return margin_left
Add enough tabs to align in two columns
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def configure ( current_node = None ) : current_node = current_node or { } cache_dir = "{0}/cache" . format ( env . node_work_path ) try : cache_exists = exists ( cache_dir ) except EOFError as e : abort ( "Could not login to node, got: {0}" . format ( e ) ) if not cache_exists : with settings ( hide ( 'running' , 'std...
Deploy chef - solo specific files
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def execute ( node ) : with hide ( 'everything' ) : virt = json . loads ( sudo ( 'ohai virtualization' ) ) if not len ( virt ) or virt [ 0 ] [ 1 ] != "host" : print ( "This node is not a Xen host, doing nothing" ) return node [ 'virtualization' ] = { 'role' : 'host' , 'system' : 'xen' , 'vms' : [ ] , } with hide ( 'eve...
Uses ohai to get virtualization information which is then saved to then node file
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def nodes_with_role ( rolename ) : nodes = [ n [ 'name' ] for n in lib . get_nodes_with_role ( rolename , env . chef_environment ) ] if not len ( nodes ) : print ( "No nodes found with role '{0}'" . format ( rolename ) ) sys . exit ( 0 ) return node ( * nodes )
Configures a list of nodes that have the given role in their run list
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def nodes_with_recipe ( recipename ) : nodes = [ n [ 'name' ] for n in lib . get_nodes_with_recipe ( recipename , env . chef_environment ) ] if not len ( nodes ) : print ( "No nodes found with recipe '{0}'" . format ( recipename ) ) sys . exit ( 0 ) return node ( * nodes )
Configures a list of nodes that have the given recipe in their run list
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def node ( * nodes ) : chef . build_node_data_bag ( ) if not len ( nodes ) or nodes [ 0 ] == '' : abort ( 'No node was given' ) elif nodes [ 0 ] == 'all' : for node in lib . get_nodes ( env . chef_environment ) : env . hosts . append ( node [ 'name' ] ) if not len ( env . hosts ) : abort ( 'No nodes found in /nodes/' )...
Selects and configures a list of nodes . all configures all nodes
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def _node_runner ( ) : env . host_string = lib . get_env_host_string ( ) node = lib . get_node ( env . host_string ) _configure_fabric_for_platform ( node . get ( "platform" ) ) if __testing__ : print "TEST: would now configure {0}" . format ( env . host_string ) else : lib . print_header ( "Configuring {0}" . format (...
This is only used by node so that we can execute in parallel
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def deploy_chef ( ask = "yes" , version = "11" ) : env . host_string = lib . get_env_host_string ( ) if ask == "no" or littlechef . noninteractive : print ( "Deploying Chef using omnibus installer version: ..." . format ( version ) ) else : message = ( '\nAre you sure you want to install Chef version:' '{0} on node {1}...
Install chef - solo on a node
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def plugin ( name ) : env . host_string = lib . get_env_host_string ( ) plug = lib . import_plugin ( name ) lib . print_header ( "Executing plugin '{0}' on " "{1}" . format ( name , env . host_string ) ) node = lib . get_node ( env . host_string ) if node == { 'run_list' : [ ] } : node [ 'name' ] = env . host_string pl...
Executes the selected plugin Plugins are expected to be found in the kitchen s plugins directory
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def list_envs ( ) : for env in lib . get_environments ( ) : margin_left = lib . get_margin ( len ( env [ 'name' ] ) ) print ( "{0}{1}{2}" . format ( env [ 'name' ] , margin_left , env . get ( 'description' , '(no description)' ) ) )
List all environments
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def list_nodes_with_tag ( tag ) : lib . print_nodes ( lib . get_nodes_with_tag ( tag , env . chef_environment , littlechef . include_guests ) )
Show all nodes which have assigned a given tag
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def list_recipes ( ) : for recipe in lib . get_recipes ( ) : margin_left = lib . get_margin ( len ( recipe [ 'name' ] ) ) print ( "{0}{1}{2}" . format ( recipe [ 'name' ] , margin_left , recipe [ 'description' ] ) )
Show a list of all available recipes
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def list_roles ( ) : for role in lib . get_roles ( ) : margin_left = lib . get_margin ( len ( role [ 'fullname' ] ) ) print ( "{0}{1}{2}" . format ( role [ 'fullname' ] , margin_left , role . get ( 'description' , '(no description)' ) ) )
Show a list of all available roles
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def _check_appliances ( ) : filenames = os . listdir ( os . getcwd ( ) ) missing = [ ] for dirname in [ 'nodes' , 'environments' , 'roles' , 'cookbooks' , 'data_bags' ] : if ( dirname not in filenames ) or ( not os . path . isdir ( dirname ) ) : missing . append ( dirname ) return ( not bool ( missing ) ) , missing
Looks around and return True or False based on whether we are in a kitchen
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def create_ticket_str ( self , prefix = None ) : if not prefix : prefix = self . model . TICKET_PREFIX return "%s-%d-%s" % ( prefix , int ( time . time ( ) ) , get_random_string ( length = self . model . TICKET_RAND_LEN ) )
Generate a sufficiently opaque ticket string to ensure the ticket is not guessable . If a prefix is provided prepend it to the string .
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def validate_ticket ( self , ticket , service , renew = False , require_https = False ) : if not ticket : raise InvalidRequest ( "No ticket string provided" ) if not self . model . TICKET_RE . match ( ticket ) : raise InvalidTicket ( "Ticket string %s is invalid" % ticket ) try : t = self . get ( ticket = ticket ) exce...
Given a ticket string and service identifier validate the corresponding Ticket . If validation succeeds return the Ticket . If validation fails raise an appropriate error .
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def delete_invalid_tickets ( self ) : for ticket in self . filter ( Q ( consumed__isnull = False ) | Q ( expires__lte = now ( ) ) ) . order_by ( '-expires' ) : try : ticket . delete ( ) except models . ProtectedError : pass
Delete consumed or expired Ticket s that are not referenced by other Ticket s . Invalid tickets are no longer valid for authentication and can be safely deleted .
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def consume_tickets ( self , user ) : for ticket in self . filter ( user = user , consumed__isnull = True , expires__gt = now ( ) ) : ticket . consume ( )
Consume all valid Ticket s for a specified user . This is run when the user logs out to ensure all issued tickets are no longer valid for future authentication attempts .
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def request_sign_out ( self , user ) : session = Session ( ) for ticket in self . filter ( user = user , consumed__gte = user . last_login ) : ticket . request_sign_out ( session = session )
Send a single logout request to each service accessed by a specified user . This is called at logout when single logout is enabled .
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def request_sign_out ( self , session = requests ) : if logout_allowed ( self . service ) : request = SingleSignOutRequest ( context = { 'ticket' : self } ) url = get_logout_url ( self . service ) or self . service session . post ( url , data = { 'logoutRequest' : request . render_content ( ) } ) logger . info ( "Singl...
Send a POST request to the ServiceTicket s logout URL to request sign - out .
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def validate_callback ( self , service , pgturl , pgtid , pgtiou ) : if not proxy_allowed ( service ) : raise UnauthorizedServiceProxy ( "%s is not authorized to use proxy authentication" % service ) if not is_scheme_https ( pgturl ) : raise InvalidProxyCallback ( "Proxy callback %s is not HTTPS" % pgturl ) if not prox...
Verify the provided proxy callback URL .
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def _get_backends ( ) : backends = [ ] backend_paths = getattr ( settings , 'MAMA_CAS_SERVICE_BACKENDS' , [ 'mama_cas.services.backends.SettingsBackend' ] ) for backend_path in backend_paths : backend = import_string ( backend_path ) ( ) backends . append ( backend ) return backends
Retrieve the list of configured service backends .
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def _is_allowed ( attr , * args ) : for backend in _get_backends ( ) : try : if getattr ( backend , attr ) ( * args ) : return True except AttributeError : raise NotImplementedError ( "%s.%s.%s() not implemented" % ( backend . __class__ . __module__ , backend . __class__ . __name__ , attr ) ) return False
Test if a given attribute is allowed according to the current set of configured service backends .
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def _is_valid_service_url ( url ) : valid_services = getattr ( settings , 'MAMA_CAS_VALID_SERVICES' , ( ) ) if not valid_services : return True warnings . warn ( 'The MAMA_CAS_VALID_SERVICES setting is deprecated. Services ' 'should be configured using MAMA_CAS_SERVICES.' , DeprecationWarning ) for service in [ re . co...
Access services list from MAMA_CAS_VALID_SERVICES .
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def get_backend_path ( service ) : for backend in _get_backends ( ) : try : if backend . service_allowed ( service ) : return "%s.%s" % ( backend . __class__ . __module__ , backend . __class__ . __name__ ) except AttributeError : raise NotImplementedError ( "%s.%s.service_allowed() not implemented" % ( backend . __clas...
Return the dotted path of the matching backend .
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def get_callbacks ( service ) : callbacks = list ( getattr ( settings , 'MAMA_CAS_ATTRIBUTE_CALLBACKS' , [ ] ) ) if callbacks : warnings . warn ( 'The MAMA_CAS_ATTRIBUTE_CALLBACKS setting is deprecated. Service callbacks ' 'should be configured using MAMA_CAS_SERVICES.' , DeprecationWarning ) for backend in _get_backen...
Get configured callbacks list for a given service identifier .
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def get_logout_url ( service ) : for backend in _get_backends ( ) : try : return backend . get_logout_url ( service ) except AttributeError : raise NotImplementedError ( "%s.%s.get_logout_url() not implemented" % ( backend . __class__ . __module__ , backend . __class__ . __name__ ) ) return None
Get the configured logout URL for a given service identifier if any .
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def logout_allowed ( service ) : if hasattr ( settings , 'MAMA_CAS_SERVICES' ) : return _is_allowed ( 'logout_allowed' , service ) if hasattr ( settings , 'MAMA_CAS_ENABLE_SINGLE_SIGN_OUT' ) : warnings . warn ( 'The MAMA_CAS_ENABLE_SINGLE_SIGN_OUT setting is deprecated. SLO ' 'should be configured using MAMA_CAS_SERVIC...
Check if a given service identifier should be sent a logout request .
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def proxy_callback_allowed ( service , pgturl ) : if hasattr ( settings , 'MAMA_CAS_SERVICES' ) : return _is_allowed ( 'proxy_callback_allowed' , service , pgturl ) return _is_valid_service_url ( service )
Check if a given proxy callback is allowed for the given service identifier .
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def clean ( self ) : username = self . cleaned_data . get ( 'username' ) password = self . cleaned_data . get ( 'password' ) if username and password : try : self . user = authenticate ( request = self . request , username = username , password = password ) except Exception : logger . exception ( "Error authenticating ...
Pass the provided username and password to the active authentication backends and verify the user account is not disabled . If authentication succeeds the User object is assigned to the form so it can be accessed in the view .
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def ns ( self , prefix , tag ) : return etree . QName ( self . prefixes [ prefix ] , tag )
Given a prefix and an XML tag output the qualified name for proper namespace handling on output .
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def validate_service_ticket ( service , ticket , pgturl = None , renew = False , require_https = False ) : logger . debug ( "Service validation request received for %s" % ticket ) if ticket and ticket . startswith ( ProxyTicket . TICKET_PREFIX ) : raise InvalidTicketSpec ( 'Proxy tickets cannot be validated with /servi...
Validate a service ticket string . Return a triplet containing a ServiceTicket and an optional ProxyGrantingTicket or a ValidationError if ticket validation failed .
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def validate_proxy_ticket ( service , ticket , pgturl = None ) : logger . debug ( "Proxy validation request received for %s" % ticket ) pt = ProxyTicket . objects . validate_ticket ( ticket , service ) attributes = get_attributes ( pt . user , pt . service ) proxies = [ pt . service ] prior_pt = pt . granted_by_pgt . g...
Validate a proxy ticket string . Return a 4 - tuple containing a ProxyTicket an optional ProxyGrantingTicket and a list of proxies through which authentication proceeded or a ValidationError if ticket validation failed .
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def validate_proxy_granting_ticket ( pgt , target_service ) : logger . debug ( "Proxy ticket request received for %s using %s" % ( target_service , pgt ) ) pgt = ProxyGrantingTicket . objects . validate_ticket ( pgt , target_service ) pt = ProxyTicket . objects . create_ticket ( service = target_service , user = pgt . ...
Validate a proxy granting ticket string . Return an ordered pair containing a ProxyTicket or a ValidationError if ticket validation failed .
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def get_attributes ( user , service ) : attributes = { } for path in get_callbacks ( service ) : callback = import_string ( path ) attributes . update ( callback ( user , service ) ) return attributes
Return a dictionary of user attributes from the set of configured callback functions .
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def logout_user ( request ) : logger . debug ( "Logout request received for %s" % request . user ) if is_authenticated ( request . user ) : ServiceTicket . objects . consume_tickets ( request . user ) ProxyTicket . objects . consume_tickets ( request . user ) ProxyGrantingTicket . objects . consume_tickets ( request . ...
End a single sign - on session for the current user .
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def user_name_attributes ( user , service ) : attributes = { } attributes [ 'username' ] = user . get_username ( ) attributes [ 'full_name' ] = user . get_full_name ( ) attributes [ 'short_name' ] = user . get_short_name ( ) return attributes
Return all available user name related fields and methods .
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def user_model_attributes ( user , service ) : ignore_fields = [ 'id' , 'password' ] attributes = { } for field in user . _meta . fields : if field . name not in ignore_fields : attributes [ field . name ] = getattr ( user , field . name ) return attributes
Return all fields on the user object that are not in the list of fields to ignore .
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def add_query_params ( url , params ) : def encode ( s ) : return force_bytes ( s , settings . DEFAULT_CHARSET ) params = dict ( [ ( encode ( k ) , encode ( v ) ) for k , v in params . items ( ) if v ] ) parts = list ( urlparse ( url ) ) query = dict ( parse_qsl ( parts [ 4 ] ) ) query . update ( params ) parts [ 4 ] =...
Inject additional query parameters into an existing URL . If parameters already exist with the same name they will be overwritten . Parameters with empty values are ignored . Return the modified URL as a string .
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def match_service ( service1 , service2 ) : s1 , s2 = urlparse ( service1 ) , urlparse ( service2 ) try : return ( s1 . scheme , s1 . netloc , s1 . path ) == ( s2 . scheme , s2 . netloc , s2 . path ) except ValueError : return False
Compare two service URLs . Return True if the scheme hostname optional port and path match .
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def redirect ( to , * args , ** kwargs ) : params = kwargs . pop ( 'params' , { } ) try : to = reverse ( to , args = args , kwargs = kwargs ) except NoReverseMatch : if '/' not in to and '.' not in to : to = reverse ( 'cas_login' ) elif not service_allowed ( to ) : raise PermissionDenied ( ) if params : to = add_query_...
Similar to the Django redirect shortcut but with altered functionality . If an optional params argument is provided the dictionary items will be injected as query parameters on the redirection URL .
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def get_config ( self , service , setting ) : try : return self . get_service ( service ) [ setting ] except KeyError : return getattr ( self , setting + '_DEFAULT' )
Access the configuration for a given service and setting . If the service is not found return a default value .