SessionManager and client-server communication implemented

git-svn-id: file:///home/www/usr01/svn/gnuviechadmin/gnuviech.info/gnuviechadmin/trunk@185 a67ec6bc-e5d5-0310-a910-815c51eb3124

backend/GnuviechAdmin/DomainManager.py

@@ -6,6 +6,9 @@
 from SessionManager import Session
 
 class DomainManager:
+    def __init__(self, dbconn):
+        self._dbconn = dbconn
+    
     def listDomains(self, session):
         if isinstance(session, Session):
             return 'a,b,c'

backend/GnuviechAdmin/ServiceFacade.py

@@ -7,13 +7,33 @@ from SessionManager import *
 from DomainManager import *
 
 class ServiceFacade:
-    def __init__(self):
-        self.sessionManager = SessionManager()
-        self.domainManager = DomainManager()
     """
     This class implements the facade to the services provided by the
     gnuviech admin backend.
     """
+    def __init__(self):
+        self.sessionManager = SessionManager(None)
+        self.domainManager = DomainManager(None)
+
+    def _dispatch(self, method, params):
+        try:
+            func = getattr(self, method)
+        except AttributeError:
+            raise Exception('method "%s" is not supported' % method)
+        else:
+            if method != 'login' and method != 'logout':
+                sessionid = params[0]
+                try:
+                    session = self.sessionManager.getSession(sessionid)
+                except InvalidSessionError:
+                    return ""
+                nparams = [session]
+                for item in params[1:]:
+                    nparams.append(item)
+                params = nparams
+                self.sessionManager.updateSession(sessionid)
+            return func(*params)
+
     def login(self, login, password):
         """
         Logs in the user specified by the given login and password.
@@ -26,12 +46,12 @@ class ServiceFacade:
         except InvalidLoginError, ile:
             return 0
 
-    def listdomains(self, sessionid):
+    def logout(self, sessionid):
+        self.sessionManager.deleteSession(sessionid)
+        return 0
+
+    def listdomains(self, session):
         """
         Lists the domains the given session may see.
         """
-        try:
-            session = self.sessionManager.getSession(sessionid)
         return self.domainManager.listDomains(session)
-        except InvalidSessionError, ise:
-            return ""

backend/GnuviechAdmin/SessionManager.py

@@ -1,37 +1,81 @@
-#
+"""
-# Session manager class for gnuviech-admin tool backend
+Session manager class for gnuviech-admin tool backend
-# (c) 2006 Jan Dittberner <jan@dittberner.info>
+(c) 2006 Jan Dittberner <jan@dittberner.info>
-# $Id$
+$Id$
-#
+"""
 import Settings
-import os
+import os, sha, time, logging
+from threading import Timer
+
+SESSIONTIMEOUT=120 # 2 minutes
 
 class InvalidLoginError(Exception):
+    """
+    Exception class for invalid logins.
+    """
     pass
 
 class InvalidSessionError(Exception):
+    """
+    Exception class for invalid sessions.
+    """
     pass
 
 class Session:
-    def __init__(self, id, login, rights, uid, gid):
+    def __init__(self, id, login):
         self.id = id
         self.login = login
-        self.right = rights
+        self._timeoutTimer = None
-        self.uid = uid
+
-        self.gid = gid
+    def settimeoutTimer(self, timeoutTimer):
+        self._timeoutTimer = timeoutTimer
+        self._timeoutTimer.start()
+
+    def gettimeoutTimer(self):
+        return self._timeoutTimer
 
 class SessionManager:
-    def _getSessionFile(self, sessionid):
+    def __init__(self, dbconn):
-        if os.path.exists(Settings.SESSIONDIR) and \
+        self._sessions = {}
-               os.path.isdir(Settings.SESSIONDIR):
+        self._dbconn = dbconn
-            return file(os.path.join(SETTINGS.SESSIONDIR, sessionid))
+        self._hashobj = sha.new(str(time.time()))
-        return None
+        self.logger = logging.getLogger('SessionManager')
+
+    def listSessions(self):
+        return self._sessions.keys()
     
     def newSession(self, login, password):
-        raise InvalidLoginError()
+        self._hashobj.update("%s,%s" % (time.time(), login))
+        sessionid = self._hashobj.hexdigest()
+        self._sessions[sessionid] = Session(sessionid, login) 
+        self.updateSession(sessionid)
+        return sessionid
+
+    def updateSession(self, sessionid):
+        self.logger.debug("update session %s" % sessionid)
+        try:
+            session = self.getSession(sessionid)
+        except InvalidSessionError, ev:
+            pass
+        else:
+            if session.gettimeoutTimer() is not None:
+                session.gettimeoutTimer().cancel()
+            session.settimeoutTimer(Timer(SESSIONTIMEOUT, self.deleteSession,
+                                          args=[sessionid]))
     
     def getSession(self, sessionid):
+        if self._sessions.has_key(sessionid):
+            return self._sessions[sessionid] 
         raise InvalidSessionError()
 
     def deleteSession(self, sessionid):
-        self._getSessionFile(sessionid)
+        self.logger.debug("delete session %s" % sessionid)
+        try:
+            session = self.getSession(sessionid)
+        except InvalidSessionError:
+            print "invalid session"
+        else:
+            if session.gettimeoutTimer() is not None:
+                session.gettimeoutTimer().cancel()
+            del(self._sessions[sessionid])
+        self.logger.debug("%d sessions remaining" % len(self.listSessions()))

backend/GnuviechAdmin/Settings.py

@@ -19,4 +19,3 @@ WEBHOME = ALLPREFIX + '/home/www/'
 USERPREFIX = 'usr'
 
 GNUVIECHADMINDIR = ALLPREFIX + '/var/lib/gnuviechadmin'
-SESSIONDIR = GNUVIECHADMINDIR + '/sessions'

backend/xmlrpcserver.py

@@ -6,9 +6,11 @@
 #
 from DocXMLRPCServer import DocXMLRPCServer
 from GnuviechAdmin import ServiceFacade
+import logging
 
 def startRPCServer():
-  server = DocXMLRPCServer(("localhost", 8080))
+	address = ('localhost', 8080)
+	server = DocXMLRPCServer(address)
 	server.register_introspection_functions()
 	server.register_instance(ServiceFacade())
 
@@ -18,4 +20,10 @@ def startRPCServer():
 		server.server_close()
 
 if __name__ == "__main__":
+	logger = logging.getLogger()
+	hdlr = logging.FileHandler('xmlrpcserver.log')
+	f = logging.Formatter('%(asctime)s %(levelname)s %(module)s: %(message)s')
+	hdlr.setFormatter(f)
+	logger.addHandler(hdlr)
+	logger.setLevel(logging.DEBUG)
 	startRPCServer()

frontend/common/xmlrpcclient.py

@@ -11,11 +11,19 @@ if __name__ == '__main__':
     logger = logging.getLogger()
     logging.basicConfig()
 
+    sessionid = None
     try:
         sessionid = server.login('jan', 'heyyou97')
         if sessionid:
-            server.listDomains(sessionid)
+            print "Session %s" % sessionid
+            print server.listdomains(sessionid)
+            server.logout(sessionid)
         else:
             print "login failed"
     except Exception, v:
         logger.exception(v)
+        if sessionid is not None:
+            try:
+                server.logout(sessionid)
+            except Exception, vn:
+                logger.exception(vn)