2 from types import StringTypes
7 from PLC.Faults import *
8 from PLC.Parameter import Parameter
9 from PLC.Filter import Filter
10 from PLC.Debug import profile
11 from PLC.Table import Row, Table
12 from PLC.Persons import Person, Persons
13 from PLC.Nodes import Node, Nodes
17 Representation of a row in the sessions table. To use, instantiate
18 with a dict of values.
21 table_name = 'sessions'
22 primary_key = 'session_id'
23 join_tables = ['person_session', 'node_session']
25 'session_id': Parameter(str, "Session key"),
26 'person_id': Parameter(int, "Account identifier, if applicable"),
27 'node_id': Parameter(int, "Node identifier, if applicable"),
28 'expires': Parameter(int, "Date and time when session expires, in seconds since UNIX epoch"),
31 def validate_expires(self, expires):
32 if expires < time.time():
33 raise PLCInvalidArgument, "Expiration date must be in the future"
35 return time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(expires))
37 add_person = Row.add_object(Person, 'person_session')
39 def add_node(self, node, commit = True):
40 # Nodes can have only one session at a time
41 self.api.db.do("DELETE FROM node_session WHERE node_id = %d" % \
44 add = Row.add_object(Node, 'node_session')
45 add(self, node, commit = commit)
47 def sync(self, commit = True, insert = None):
48 if not self.has_key('session_id'):
49 # Before a new session is added, delete expired sessions
50 expired = Sessions(self.api, expires = -int(time.time()))
51 for session in expired:
52 session.delete(commit)
54 # Generate 32 random bytes
55 bytes = random.sample(xrange(0, 256), 32)
56 # Base64 encode their string representation
57 self['session_id'] = base64.b64encode("".join(map(chr, bytes)))
61 Row.sync(self, commit, insert)
63 class Sessions(Table):
65 Representation of row(s) from the session table in the database.
68 def __init__(self, api, session_filter = None, expires = int(time.time())):
69 Table.__init__(self, api, Session)
71 sql = "SELECT %s FROM view_sessions WHERE True" % \
72 ", ".join(Session.fields)
74 if session_filter is not None:
75 if isinstance(session_filter, (list, tuple, set)):
76 # Separate the list into integers and strings
77 ints = filter(lambda x: isinstance(x, (int, long)), session_filter)
78 strs = filter(lambda x: isinstance(x, StringTypes), session_filter)
79 session_filter = Filter(Session.fields, {'person_id': ints, 'session_id': strs})
80 sql += " AND (%s) %s" % session_filter.sql(api, "OR")
81 elif isinstance(session_filter, dict):
82 session_filter = Filter(Session.fields, session_filter)
83 sql += " AND (%s) %s" % session_filter.sql(api, "AND")
85 if expires is not None:
87 sql += " AND expires > %(expires)d"
90 sql += " AND expires < %(expires)d"
92 self.selectall(sql, locals())