- implemented the application logic in app.py.

- the serve.py is now only the interface, everything goes through App class. - implemented an /admin page to authorize students and reset passwords. this is done with a webservice that responds to AJAX. test: - check if questions exist when building testfactory - final grade is rounded to 1 decimal place (0.0 - 20.0) questions: - added support for correction comments for textarea type questions. - scripts can return grade or a dictionary {grade: 10.0, comments:'hello'} serve: - implemented a werbservice for /admin - moved authentication requirements into the serve.py - tried to improve security (but webservices still missing) - templates are obtained only once regressions: - configuration is a completle mess

- implemented the application logic in app.py.
- the serve.py is now only the interface, everything goes through App class. - implemented an /admin page to authorize students and reset passwords. this is done with a webservice that responds to AJAX. test: - check if questions exist when building testfactory - final grade is rounded to 1 decimal place (0.0 - 20.0) questions: - added support for correction comments for textarea type questions. - scripts can return grade or a dictionary {grade: 10.0, comments:'hello'} serve: - implemented a werbservice for /admin - moved authentication requirements into the serve.py - tried to improve security (but webservices still missing) - templates are obtained only once regressions: - configuration is a completle mess
Miguel Barão
1 parent da217853
Showing 20 changed files with 799 additions and 596 deletions Show diff stats
.gitignore
BUGS.md
app.py
config/server.conf
database.py
myauth.py
questions.py
serve.py
static/js/admin.js
static/js/bootstrap-3.3.6.min.js
static/js/bootstrap.min.js
static/js/bootstrap.min.js
static/js/jquery-2.1.4.min.js
static/js/jquery-2.2.4.min.js
static/js/jquery.min.js
templates/admin.html
templates/grade.html
templates/login.html
templates/test.html
test.py
@@ -0,0 +1 @@
+__pycache__/
 # BUGS
-- em practice, depois da submissao o teste corrigido perde as respostas anteriores. perguntas estao todas expostas.
-- cherrypy faz logs para consola...
-- mensagens info nao aparecem no serve.py
+- pagina de login nao esta a apresentar bem. parece que precisa de autorizacao para aceder a /static...
 - usar thread.Lock para aceder a variaveis de estado.
-- ordenar activos por hora de login.
-- se no teste uma das "ref" nao existir nos ficheiros de perguntas, rebenta.
-- no final do teste (em modo avaliacao) o aluno é removido da lista allowed. para fazer novamente necessita de aprovação do professor.
-- mesmo aluno pode entrar várias vezes em simultaneo...
-- qd scripts não são executáveis rebenta. Testar isso e dar uma mensagem de erro.
-- paths manipulation in strings is unix only ('/something'). use os.path to create paths.
-- alunos vêm nota final arredondada às decimas, mas é apenas um arredondamento visual. Pode acontecer o aluno chumbar, mas ver uma nota positiva (e.g.  9.46 mostra 9.5 e presume que esta aprovado). Mostrar 3 casas?
-- alunos podem entrar duas vezes em simultaneo. impedir, e permitir ao docente fazer kick-out
-- detectar se falta 'correct' nas perguntas.
-- check if script to generate questions exist before instantiation.
-- testar regex na definicao das perguntas. como se faz rawstring em yaml? singlequote? problemas de backslash??? sim... necessário fazer \\ em varios casos, mas não é claro! e.g. \n é convertido em espaço mas \w é convertido em \\ e w. Solução (http://stackoverflow.com/questions/10771163/python-interpreting-a-regex-from-a-yaml-config-file) é fazer
-    correct: !!python/regex '^(yes|no)'
-
+- permitir adicionar imagens nas perguntas
+- browser e ip usados gravado no test.
+- configuracao dos logs cherrypy para se darem bem com os outros
 # TODO
-- refazer questions.py para ter uma classe QuestionFectory?
-- refazer serve.py para usar uma classe App() com lógica separada do cherrypy
-- controlar acessos dos alunos: allowed/denied/online threadsafe na App()
+- implementar practice mode.
+- SQLAlchemy em vez da classe database.
 - argumentos da linha de comando a funcionar.
-- permitir adicionar imagens nas perguntas
 - aviso na pagina principal para quem usa browser da treta
-- permitir enviar varios testes, aluno escolhe qual o teste que quer fazer.
+- permitir varios testes, aluno escolhe qual o teste que quer fazer.
 - criar perguntas de outros tipos, e.g. associação, ordenação, varios textinput
-- browser e ip usados gravado no test.
+- perguntas para professor corrigir mais tarde.
 - single page web no frontend
-- SQLAlchemy em vez da classe database.
-- script de correcção pode enviar dicionario yaml com grade e comentarios. ex:
-    grade: 0.5
-    comments: Falhou na função xpto.
-    os comentários são guardados no teste (ficheiro) ou enviados para o browser no modo practice.
-- warning quando se executa novamente o mesmo teste na consola. ie se ja houver submissoes desse teste.
-- na cotacao da pergunta indicar o intervalo, e.g.  [-0.2, 1],  [0, 0.5]
-- Criar botão para o docente fazer enable/disable do aluno explicitamente (exames presenciais).
-- criar script json2md.py ou outra forma de gerar um teste ja realizado
+- criar script json2md.py ou outra forma de visualizar um teste ja realizado
 - Menu para professor com link para /results e /students
-- perguntas para professor corrigir mais tarde.
-- share do score em /results (email)
 - fazer uma calculadora javascript e por no menu. surge como modal
+- GeoIP?
+- mostrar botão de reset apenas para alunos com password definida?
 # FIXED
-- ordenar lista de alunos pelos online/offline, e depois pelo numero.
-- hash das passwords concatenadas com salt gerado aleatoriamente. necessario acrescentar salt de cada aluno. gerar salt com os.urandom(256)
-- fix ans directory. relative to what?? current dir?
-- textarea com opcao de numero de linhas (consoante o programa a desenvolver podem ser necessarias mais ou menos linhas)
-- desligar submissao com tecla enter no chrome/mac
-- se database for mal configurada, é criada uma base de dados vazia e rebenta na autenticacao.
-- questions type script, necessário dar um caminho exacto relativamete ao directorio do server em vez da pergunta. deveria ser possivel mover as perguntas de directorio sem rebentar os caminhos.
-- check that files exist in questions generator e correct textarea. add path in test.yaml
-- scripts generator and correct should consider the questions path.
-- testar envio de parametros para stdin para perguntas tipo generator.
-- mathjax e jquery no login
-- mostrar erro quando nao consegue importar questions files
-- pacotes exactos usados para instalar.
-- detectar colisoes nas referencias das perguntas.
-- usar pomba da ue moderna.
-- /results esta ordenado por numero e nao por data
-- numeros das perguntas não fazem sentido quando há caixas de informação (numerar informacao tb?)
-- Quando apresenta o teste, preencher com os valores definidos em answer (permite que professor dê informação à partida, e no modo practice fiquem com o preenchido anteriormente)
-- information points é definido onde? test.y ou questions.py?
-- textarea monospace
-- disable tab behavior in textarea.
-- command line options --debug --show_points --show_hints --practice_mode
-- manual de utilizacao.
-- criar pergunta gerada por script externo.
-- debug mode
-- in the train_mode, there is no way to logout. Add logout option in the menu.
-- simplificar a gravacao do teste em json.
-- mostrar numero ordem em /results
-- modal a pedir confirmação de submissão.
-- pontos devem estar normalizados escala 0-20
-- mostrar numero de alunos online em /students
-- mostrar cotacao das perguntas, show_points, default:False
+- Não mostrar Professor nos activos em /admin
+- /admin mostrar actualizações automaticamente?
+- se no teste uma das "ref" nao existir nos ficheiros de perguntas, rebenta.
+- alunos podem estar online, mas browser perder sessao => nao conseguem mais entrar porque a App pensa que estão online. Permitir login e dar o mesmo teste.
+- pagina de management dos alunos. 
+    mostrar online ordenados por hora de login, offline por número.
+    permitir reset da pw e allow/disallow
+- script de correcção pode enviar dicionario yaml com grade e comentarios. ex:
+    grade: 0.5
+    comments: Falhou na função xpto.
+    os comentários são guardados no teste (ficheiro) ou enviados para o browser no modo practice.
+- testar regex na definicao das perguntas. como se faz rawstring em yaml?
+    singlequote? problemas de backslash??? sim... necessário fazer \\ em varios casos, mas não é claro! e.g. \n é convertido em espaço mas \w é convertido em \\ e w. Solução (http://stackoverflow.com/questions/10771163/python-interpreting-a-regex-from-a-yaml-config-file) é fazer
+            correct: !regex '^(yes|no)'
@@ -0,0 +1,162 @@
+
+
+import logging
+from os import path
+import sqlite3
+
+import bcrypt
+
+import test
+import database
+
+# ============================================================================
+#   Application
+# ============================================================================
+class App(object):
+    def __init__(self, filename, conf):
+        # online = {
+        #   uid1: {
+        #     'student': {'number': 123, 'name': john},
+        #     'test': ...
+        #   }
+        #   uid2: {...}
+        # }
+        logger.info('============= Running perguntations =============')
+        self.online = dict()               # {uid: {'student':{}}}
+        self.allowed = set([13361,13682])  # '0' is hardcoded to allowed elsewhere
+        self.testfactory = test.TestFactory(filename, conf=conf)
+        self.db = database.Database(self.testfactory['database']) # FIXME
+        try:
+            n = self.db.get_count_students()
+        except sqlite3.OperationalError as e:
+            logger.critical('Database not usable {}.'.format(self.db.db))
+            raise e
+        else:
+            logger.info('Database has {} students registered.'.format(n))
+
+
+    def exit(self):
+        logger.critical('----------- !!! Server terminated !!! -----------')
+
+
+    def login(self, uid, try_pw):
+        if uid not in self.allowed and uid != '0':
+            # not allowed
+            logger.warning('Student {}:  not allowed to login.'.format(uid))
+            return False
+
+        student = self.db.get_student(uid)
+        if student is None:
+            # not found
+            logger.warning('Student {}:  not found in database.'.format(uid))
+            return False
+
+        # uid found in database
+        name, pw = student
+
+        if pw == '':
+            # update password on first login
+            hashed_pw = bcrypt.hashpw(try_pw.encode('utf-8'), bcrypt.gensalt())
+            self.db.update_password(uid, hashed_pw)
+            logger.warning('Student {}:  first login, password updated.'.format(uid))
+        elif bcrypt.hashpw(try_pw.encode('utf-8'), pw) != pw:
+            # wrong password
+            logger.info('Student {}:  wrong password.'.format(uid))
+            return False
+
+        # success
+        self.allowed.discard(uid)
+        if uid in self.online:
+            logger.warning('Student {}:  already logged in.'.format(uid))
+        else:
+            self.online[uid] = {'student': {'name': name, 'number': uid}}
+            logger.info('Student {}:  logged in.'.format(uid))
+        return True
+
+
+    def logout(self, uid):
+        if uid not in self.online:
+            # this should never happen
+            logger.error('Student {}:  tried to logout, but is not logged in.'.format(uid))
+            return False
+        else:
+            logger.info('Student {}:  logged out.'.format(uid))
+            del self.online[uid]
+            return True
+
+    def generate_test(self, uid):
+        if uid in self.online:
+            logger.info('Student {}:  generating new test.'.format(uid))
+            student_id = self.online[uid]['student']
+            self.online[uid]['test'] = self.testfactory.generate(student_id)
+            return self.online[uid]['test']
+        else:
+            logger.error('Student {}:  offline, can''t generate test'.format(uid))
+            return None
+
+    def correct_test(self, uid, ans):
+        t = self.online[uid]['test']
+        t.update_answers(ans)
+        grade = t.correct()
+        logger.info('Student {0}:  finished with {1} points.'.format(uid, grade))
+
+        if t['save_answers']:
+            fname = ' -- '.join((t['student']['number'], t['ref'], str(t['finish_time']))) + '.json'
+            fpath = path.abspath(path.join(t['answers_dir'], fname))
+            t.save_json(fpath)
+
+        self.db.save_test(t)
+        self.db.save_questions(t)
+        return grade
+
+
+    # --- helpers (getters)
+    def get_student_name(self, uid):
+        return self.online[uid]['student']['name']
+    def get_test(self, uid, default=None):
+        return self.online[uid].get('test', default)
+    def get_test_qtypes(self, uid):
+        return {q['ref']:q['type'] for q in self.online[uid]['test']['questions']}
+    def get_student_grades(self, uid):
+        return self.db.get_student_grades(uid)
+
+    def get_online_students(self):
+        # list of ('uid', 'name', 'start_time') sorted by start time
+        return sorted(
+            ((k, v['student']['name'], str(v.get('test', {}).get('start_time', '---'))) for k,v in self.online.items() if k != '0'),
+            key=lambda k: k[2]   # sort key
+        )
+
+    def get_offline_students(self):
+        # list of ('uid', 'name') sorted by number
+        return sorted((s[:2] for s in self.db.get_all_students() if s[0] not in self.online), key=lambda k: k[0])
+
+    # def get_this_students_grades(self):
+    #     # list of ('uid', 'name') sorted by number
+    #     return self.db.get_students_grades(self.testfactory['ref'])
+
+    def get_allowed_students(self):
+        # set of 'uid' allowed to login
+        return self.allowed
+
+    # --- helpers (change state)
+    def allow_student(self, uid):
+        self.allowed.add(uid)
+        logger.info('Student {}:  allowed to login.'.format(uid))
+
+    def deny_student(self, uid):
+        self.allowed.discard(uid)
+        logger.info('Student {}:  denied to login'.format(uid))
+
+    def reset_password(self, uid):
+        self.db.reset_password(uid)
+        logger.info('Student {}:  password reset to ""'.format(uid))
+
+# ============================================================================
+ch = logging.StreamHandler()
+ch.setLevel(logging.INFO)
+ch.setFormatter(logging.Formatter('%(asctime)s | %(name)-10s | %(levelname)-8s | %(message)s'))
+
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
+logger.addHandler(ch)
@@ -12,33 +12,18 @@ server.thread_pool= 10
 server.socket_host = '0.0.0.0'
 server.socket_port = 8080
-; Uncomment to enable SSL
-; 'builtin' or 'pyopenssl'
+; Uncomment to enable SSL  (ssl_module = 'builtin' or 'pyopenssl')
 ; server.ssl_module = 'builtin'
 ; server.ssl_certificate = 'certs/webserver.crt'
 ; server.ssl_private_key = 'certs/webserver.key'
+
 ; not required for snakeoil:
 ; server.ssl_certificate_chain = 'ca_certs.crt'
-log.screen = False
-
 # add path to the log files here. empty strings disable logging
 ; log.error_file = 'logs/errors.log'
 ; log.access_file = 'logs/access.log'
 log.error_file = ''
 log.access_file = ''
+log.screen = False
-# DO NOT DISABLE SESSIONS!
-tools.sessions.on = True
-tools.sessions.timeout = 240
-tools.sessions.storage_type = 'ram'
-tools.sessions.storage_path = 'sessions'
-
-; FIXME what is this for?
-tools.auth.on = True
-
-[/]
-; Default root is under the server directory, but can be changed here
-; tools.staticdir.root = os.path.normpath(os.path.abspath(os.path.curdir))
-tools.staticdir.dir = 'static'
-tools.staticdir.on = True
 import sqlite3
-from hashlib import sha256
 class Database(object):
     def __init__(self, db):
         self.db = db  # sqlite3 filename
-        # FIXME check that database exists
-    # get results from previous tests of a student
-    def student_grades(self, uid):
+    def get_count_students(self):
         with sqlite3.connect(self.db) as c:
-            grades = c.execute('SELECT test_id,grade,finish_time FROM tests WHERE student_id==?', [uid])
-            return grades.fetchall()
+            sql = 'SELECT COUNT(*) FROM students'
+            return c.execute(sql).fetchone()[0]
-    # return list of students and their results for a given test
-    def test_grades(self, test_id):
+    def reset_password(self, uid):
         with sqlite3.connect(self.db) as c:
-            # with all tests done by each student:
-            # cmd = 'SELECT student_id,name,grade FROM students INNER JOIN tests ON students.number=tests.student_id WHERE test_id==? ORDER BY grade DESC;'
-
-            # only the best result for each student
-            cmd = '''
-                SELECT student_id, name, MAX(grade), finish_time
-                FROM students INNER JOIN tests
-                ON students.number=tests.student_id
-                WHERE test_id==? AND student_id!=0
-                GROUP BY student_id
-                ORDER BY grade DESC, finish_time DESC;'''
-            return c.execute(cmd, [test_id]).fetchall()
-
-    # return list of students and their results for a given test
-    def test_grades2(self, test_id):
+            sql = 'UPDATE students SET password="" WHERE number=?'
+            c.execute(sql, [uid])
+
+    def update_password(self, uid, pw):
+        # saves pw as is (should be already hashed)
         with sqlite3.connect(self.db) as c:
-            # with all tests done by each student:
-            # cmd = 'SELECT student_id,name,grade FROM students INNER JOIN tests ON students.number=tests.student_id WHERE test_id==? ORDER BY grade DESC;'
-
-            # only the best result for each student
-            cmd = '''
-                SELECT student_id, name, grade, start_time, finish_time
-                FROM students INNER JOIN tests
-                ON students.number=tests.student_id
-                WHERE test_id==?
-                ORDER BY finish_time ASC;'''
-            return c.execute(cmd, [test_id]).fetchall()
-
-    # get list of students in the database
-    def get_students(self):
+            sql = 'UPDATE students SET password=? WHERE number=?'
+            c.execute(sql, (pw, uid))
+
+    def get_student(self, uid):
         with sqlite3.connect(self.db) as c:
-            students = c.execute('SELECT number,name,password FROM students ORDER BY number ASC;')
-            return students.fetchall()
+            sql = 'SELECT name,password FROM students WHERE number=?'
+            try:
+                name, pw = c.execute(sql, [uid]).fetchone()
+            except:
+                return None
+            else:
+                return (name, pw)
-    # the following methods update de database data
+    def get_all_students(self):
+        with sqlite3.connect(self.db) as c:
+            sql = 'SELECT number,name,password FROM students ORDER BY number ASC'
+            students = c.execute(sql).fetchall()
+            return students
-    def save_test(self, t):
+    # get all results for a particular test. If a student has submited more than
+    # one test, returns the highest grade  FIXME not tested, not used
+    # def get_students_grades(self, testid):
+    #     with sqlite3.connect(self.db) as c:
+    #         grades = c.execute('SELECT student_id,MAX(grade) FROM tests WHERE test_id==?', [testid])
+    #         return grades.fetchall()
+
+    # get results from previous tests of a student
+    def get_student_grades(self, uid):
         with sqlite3.connect(self.db) as c:
-            # store result of the test
-            values = (t['ref'], t['student']['number'], t['grade'], str(t['start_time']), str(t['finish_time']))
-            c.execute('INSERT INTO tests VALUES (?,?,?,?,?)', values)
+            grades = c.execute('SELECT test_id,grade,finish_time FROM tests WHERE student_id==?', [uid])
+            return grades.fetchall()
-            # store grade of every question in the test
-            try:
-                ans = [(t['ref'], q['ref'], t['student']['number'], q['grade'], str(t['finish_time'])) for q in t['questions']]
-            except KeyError as e:
-                print('  * Questions {0} do not have grade defined.'.format(tuple(q['ref'] for q in t['questions'] if 'grade' not in q)))
-                raise e
-            c.executemany('INSERT INTO questions VALUES (?,?,?,?,?)', ans)
-
-    def student_reset_pw(self, d):
-        # d = {'12345': 'mypassword', ...}
+    def save_test(self, t):
         with sqlite3.connect(self.db) as c:
-            for num, pw in d.items():
-                if pw != '':
-                    pw = sha256(pw.encode('utf-8')).hexdigest()
-                cmd = 'UPDATE students SET password=? WHERE number=?'
-                c.execute(cmd, (pw, num))
+            # save final grade of the test
+            sql = 'INSERT INTO tests VALUES (?,?,?,?,?)'
+            test = (t['ref'], t['student']['number'], t['grade'], str(t['start_time']), str(t['finish_time']))
+            c.execute(sql, test)
-    def student_add(self, number, name, password=''):  # FIXME testar...
+    def save_questions(self, t):
         with sqlite3.connect(self.db) as c:
-            if password != '':
-                password = sha256(password.encode('utf-8')).hexdigest()
-            cmd = 'INSERT INTO students VALUES (?, ?, ?);'
-            c.execute(cmd, number, name, password)
+            # save grades of all the questions (omits questions without grade)
+            sql = 'INSERT INTO questions VALUES (?,?,?,?,?)'
+            questions = [(t['ref'], q['ref'], t['student']['number'], q['grade'], str(t['finish_time'])) for q in t['questions'] if 'grade' in q]
+            c.executemany(sql, questions)
+
+
+
+
+    # def insert_student(self, number, name, password=''):  # FIXME testar...
+    #     with sqlite3.connect(self.db) as c:
+    #         if password != '':
+    #             password = sha256(password.encode('utf-8')).hexdigest() # FIXME bcrypt
+    #         cmd = 'INSERT INTO students VALUES (?, ?, ?);'
+    #         c.execute(cmd, number, name, password)
+
+
+
+
+    # # return list of students and their results for a given test
+    # def get_test_grades(self, test_id):
+    #     with sqlite3.connect(self.db) as c:
+    #         # with all tests done by each student:
+    #         # cmd = 'SELECT student_id,name,grade FROM students INNER JOIN tests ON students.number=tests.student_id WHERE test_id==? ORDER BY grade DESC;'
+
+    #         # only the best result for each student
+    #         cmd = '''
+    #             SELECT student_id, name, MAX(grade), finish_time
+    #             FROM students INNER JOIN tests
+    #             ON students.number=tests.student_id
+    #             WHERE test_id==? AND student_id!=0
+    #             GROUP BY student_id
+    #             ORDER BY grade DESC, finish_time DESC;'''
+    #         return c.execute(cmd, [test_id]).fetchall()
+
+    # # return list of students and their results for a given test
+    # def test_grades2(self, test_id):
+    #     with sqlite3.connect(self.db) as c:
+    #         # with all tests done by each student:
+    #         # cmd = 'SELECT student_id,name,grade FROM students INNER JOIN tests ON students.number=tests.student_id WHERE test_id==? ORDER BY grade DESC;'
+
+    #         # only the best result for each student
+    #         cmd = '''
+    #             SELECT student_id, name, grade, start_time, finish_time
+    #             FROM students INNER JOIN tests
+    #             ON students.number=tests.student_id
+    #             WHERE test_id==?
+    #             ORDER BY finish_time ASC;'''
+    #         return c.execute(cmd, [test_id]).fetchall()
+
+
+    # the following methods update de database data
+
@@ -1,169 +0,0 @@
-# -*- encoding: utf-8 -*-
-
-# TODO:
-# - testar logout
-# - session fixation
-# - member_of...
-
-import cherrypy
-import sqlite3
-import bcrypt
-from mako.lookup import TemplateLookup
-import urllib
-import html
-from os import path
-
-# path where this file is located
-server_path = path.dirname(path.realpath(__file__))
-
-SESSION_KEY = 'userid'
-
-templates = TemplateLookup(directories=[server_path+'/templates'], input_encoding='utf-8')
-
-
-def credentials_ok(uid, password, db):
-    '''Given a userid, password and database, checks if the userid exists in
-    the database, a checks if the password is correct. The password is
-    updated if it's initially empty.
-    Returns the name of the student on success, otherwise returns None.
-    '''
-
-    with sqlite3.connect(db) as c:
-        # search student in database
-        sql_cmd = 'SELECT name,password FROM students WHERE number=?'
-        try:
-            name, pwhash = c.execute(sql_cmd, [uid]).fetchone()
-        except:
-            cherrypy.log.error('Student %s not found!' % uid, 'APPLICATION')
-            return None
-
-        # student found in db
-        if pwhash == '':
-            # update password on first login
-            hashed = bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt())
-            sql_cmd = 'UPDATE students SET password=? WHERE number=?'
-            c.execute(sql_cmd, (hashed, uid))
-            cherrypy.log.error('Student %s updated his password.' % uid, 'APPLICATION')
-            return name
-        else:
-            # check password
-            if bcrypt.hashpw(password.encode('utf-8'), pwhash) == pwhash:
-                cherrypy.log.error('Student %s logged in.' % uid, 'APPLICATION')
-                return name
-            else:
-                cherrypy.log.error('Student %s wrong password.' % uid, 'APPLICATION')
-                return None
-
-
-def check_auth(*args, **kwargs):
-    """A tool that looks in config for 'auth.require'. If found and it
-    is not None, a login is required and the entry is evaluated as a list of
-    conditions that the user must fulfill"""
-    conditions = cherrypy.request.config.get('auth.require', None)
-    get_parmas = urllib.request.quote(cherrypy.request.request_line.split()[1])
-    if conditions is not None:
-        user = cherrypy.session.get(SESSION_KEY, None)
-
-        # if already logged in, must satisfy conditions
-        # else redirects to login page
-        if user is not None:
-            cherrypy.request.login = user
-            for condition in conditions:
-                # A condition is just a callable that returns true or false
-                if not condition():
-                    raise cherrypy.HTTPRedirect("/auth/login?from_page=%s" % get_parmas)
-        else:
-            raise cherrypy.HTTPRedirect("/auth/login?from_page=%s" % get_parmas)
-
-cherrypy.tools.auth = cherrypy.Tool('before_handler', check_auth)
-
-
-def require(*conditions):
-    """A decorator that appends conditions to the auth.require config
-    variable."""
-    def decorate(f):
-        if not hasattr(f, '_cp_config'):
-            f._cp_config = dict()
-        if 'auth.require' not in f._cp_config:
-            f._cp_config['auth.require'] = []
-        f._cp_config['auth.require'].extend(conditions)
-        return f
-    return decorate
-
-
-# Conditions are callables that return True
-# if the user fulfills the conditions they define, False otherwise
-#
-# They can access the current username as cherrypy.request.login
-#
-# Define those at will however suits the application.
-
-def member_of(groupname):
-    def check():
-        # replace with actual check if <username> is in <groupname>
-        return cherrypy.request.login == 'joe' and groupname == 'admin' # FIXME
-    return check
-
-
-def name_is(reqd_username):
-    return lambda: reqd_username == cherrypy.request.login
-
-
-# These might be handy
-def any_of(*conditions):
-    """Returns True if any of the conditions match"""
-    def check():
-        for c in conditions:
-            if c():
-                return True
-        return False
-    return check
-
-
-# By default all conditions are required, but this might still be
-# needed if you want to use it inside of an any_of(...) condition
-def all_of(*conditions):
-    """Returns True if all of the conditions match"""
-    def check():
-        for c in conditions:
-            if not c():
-                return False
-        return True
-    return check
-
-
-# ============================================================================
-class AuthController(object):
-    def __init__(self, database):
-        self.database = database
-
-    @cherrypy.expose
-    def login(self, uid=None, pw=None, from_page='/'):
-        # XSS vulnerability if from_page is maliciously formed.
-        # e.g.   /auth/login?from_page="/><script>...
-        # will inject the string "/><string>... into the variable from_page
-        # of this function. Rendering a login page will then inject (reflect)
-        # the script. Not sure how serious it can be, since it is not stored
-        # in the server, only executed on the client browser...
-        # html.escape will replace > < & etc used in html by &lt; etc
-        from_page = html.escape(from_page)
-
-        db = self.database
-        if uid is not None and pw is not None:
-            name = credentials_ok(uid, pw, db)
-            if name is not None:
-                cherrypy.session[SESSION_KEY] = cherrypy.request.login = uid
-                cherrypy.session['name'] = name
-                raise cherrypy.HTTPRedirect(from_page)
-        logintemplate = templates.get_template('/login.html')
-        return logintemplate.render(from_page=from_page)
-
-    @cherrypy.expose
-    def logout(self):
-        # FIXME logout is not working!!!
-        cherrypy.lib.sessions.expire()  # session cookie expires on client
-        user = cherrypy.session.get(SESSION_KEY, None)
-        cherrypy.session[SESSION_KEY] = None
-        if user is not None:
-            cherrypy.request.login = None
-        raise cherrypy.HTTPRedirect('/')
@@ -51,9 +51,12 @@ logger.addHandler(ch)
 try:
     import yaml
 except ImportError:
-    logger.critical('The package "yaml" is missing. See README.md for instructions.')
+    logger.critical('Python package missing. See README.md for instructions.')
     sys.exit(1)
-
+else:
+    # all regular expressions in yaml files, for example
+    #       correct: !regex '[aA]zul'
+    yaml.add_constructor('!regex', lambda l, n: re.compile(l.construct_scalar(n)))
 # ---------------------------------------------------------------------------
 # Runs a script and returns its stdout parsed as yaml, or None on error.
@@ -68,10 +71,10 @@ def run_script(script, stdin=&#39;&#39;, timeout=5):
             timeout=timeout,
             )
     except FileNotFoundError:
-        logger.error('Script "{0}" not found.'.format(script))
+        logger.error('Script not found: "{0}".'.format(script))
         # return qerror
     except PermissionError:
-        logger.error('Script "{0}" has wrong permissions. Is it executable?'.format(script))
+        logger.error('Script "{0}" not executable (wrong permissions?).'.format(script))
     except subprocess.TimeoutExpired:
         logger.error('Timeout {0}s exceeded while running script "{1}"'.format(timeout, script))
     else:
@@ -95,7 +98,7 @@ class QuestionFactory(dict):
         super().__init__()
     # -----------------------------------------------------------------------
-    # Add single question defined provided a dictionary.
+    # Add single question provided in a dictionary.
     # After this, each question will have at least 'ref' and 'type' keys.
     # -----------------------------------------------------------------------
     def add(self, question):
@@ -142,7 +145,7 @@ class QuestionFactory(dict):
             else:
                 logger.error('Question index {0} from file {1} is not a dictionary. Skipped!'.format(i, filename))
-        logger.info('Loaded {0} questions from "{1}" to the pool.'.format(n, filename))
+        logger.info('Loaded {0} questions from "{1}".'.format(n, filename))
     # -----------------------------------------------------------------------
     # load multiple YAML question files
@@ -427,6 +430,7 @@ class QuestionTextArea(Question):
             'text': '',
             'lines': 8,
             'timeout': 5,  # seconds
+            'correct': ''  # trying to execute this will fail => grade 0.0
             })
         self['correct'] = path.abspath(path.normpath(path.join(self['path'], self['correct'])))
@@ -447,14 +451,13 @@ class QuestionTextArea(Question):
                 self['grade'] = float(out)
             elif isinstance(out, dict):
+                self['comments'] = out.get('comments', '')
                 try:
                     self['grade'] = float(out['grade'])
                 except ValueError:
                     logger.error('Correction script of "{0}" returned nonfloat.'.format(self['ref']))
                 except KeyError:
                     logger.error('Correction script of "{0}" returned no "grade" key.'.format(self['ref']))
-                else:
-                    self['comments'] = out.get('comments', '')
         return self['grade']
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-# The program runs a web server where students login to answer a sequence of questions.
-# Their grades are automatically calculated and stored in a sqlite3 database.
 from os import path
 import sys
 import argparse
-import logging
-# from threading import Lock
+# import logging
+import html
+import json
 try:
     import cherrypy
-except ImportError:
-    print('The package "cherrypy" is missing. See README.md for instructions.')
-    sys.exit(1)
-
-try:
+    from cherrypy.lib import auth_digest
     from mako.lookup import TemplateLookup
 except ImportError:
-    print('The package "mako" is missing. See README.md for instructions.')
+    print('Some python packages are missing. See README.md for instructions.')
     sys.exit(1)
 # my code
-from myauth import AuthController, require
-import test
-import database
+from app import App
+
+# ============================================================================
+#   Authentication
+# ============================================================================
+def check_auth(*args, **kwargs):
+    """A tool that looks in config for 'auth.require'. If found and it
+    is not None, a login is required and the entry is evaluated as a list of
+    conditions that the user must fulfill"""
+    conditions = cherrypy.request.config.get('auth.require', None)
+    if conditions is not None:
+        username = cherrypy.session.get(SESSION_KEY)
+        if username:
+            # user logged in
+            cherrypy.request.login = username
+            for condition in conditions:
+                # A condition is just a callable that returns true or false
+                if not condition():
+                    raise cherrypy.HTTPRedirect("/")
+        else:
+            # user not currently logged in
+            raise cherrypy.HTTPRedirect("/login")
+cherrypy.tools.auth = cherrypy.Tool('before_handler', check_auth)
+
+
+# A decorator that appends conditions to the auth.require config variable.
+def require(*conditions):
+    def decorate(f):
+        if not hasattr(f, '_cp_config'):
+            f._cp_config = dict()
+        f._cp_config.setdefault('auth.require', []).extend(conditions)
+        return f
+    return decorate
+
+
+def name_is(reqd_username):
+    return lambda: reqd_username == cherrypy.request.login
 # ============================================================================
-#   Classes that respond to HTTP
+#   Improve cherrypy security
+#   http://docs.cherrypy.org/en/latest/advanced.html#securing-your-server
 # ============================================================================
-class Root(object):
+def secureheaders():
+    headers = cherrypy.response.headers
+    headers['X-Frame-Options'] = 'DENY'
+    headers['X-XSS-Protection'] = '1; mode=block'
+    headers['Content-Security-Policy'] = "default-src='self'"
+    if (cherrypy.server.ssl_certificate != None and cherrypy.server.ssl_private_key != None):
+         headers['Strict-Transport-Security'] = 'max-age=31536000'  # one year
-    def __init__(self, testconf):
-        self.testconf = testconf  # base test dict (not instance)
-        self.database = database.Database(testconf['database'])
-        self.auth = AuthController(database=testconf['database'])
-        self.templates = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8')
-        # FIXME should be in application, not server
-        # FIXME lock and threading
-        self.tags = {'allowed': set(['0']), 'online': set(), 'finished': set()}
-
-    # --- DEFAULT ------------------------------------------------------------
-    # any path, e.g. /xpto/aargh is redirected to the test
-    # (and possibly through the login first)
-    @cherrypy.expose
-    def default(self, *args):
-        raise cherrypy.HTTPRedirect('/test')
-    # --- LOGOUT -------------------------------------------------------------
-    @cherrypy.expose
-    @require()
-    def logout(self):
-        uid = cherrypy.session.get('userid')
-        self.tags['online'].discard(uid)
-        cherrypy.lib.sessions.expire()  # session coockie expires client side
-        cherrypy.session['userid'] = cherrypy.request.login = None
-        cherrypy.log.error('Student {0} logged out.'.format(uid), 'APPLICATION')
-        raise cherrypy.HTTPRedirect('/')
+# ============================================================================
+#   Admin webservice
+# ============================================================================
+class AdminWebService(object):
+    exposed = True
+
+    def __init__(self, app):
+        self.app = app
+
+    @cherrypy.tools.accept(media='application/json')
+    def GET(self):
+        data = {
+            'online': self.app.get_online_students(),
+            'offline': self.app.get_offline_students(),
+            'allowed': list(self.app.get_allowed_students()),
+            # 'finished': self.app.get_this_students_grades()
+        }
+        # print(dict(data['finished']))
+        return json.dumps(data, default=str)
+
+    def POST(self, **args):
+        # print('POST', args) # FIXME
+        if args['cmd'] == 'allow':
+            if args['value'] == 'true':
+                return self.app.allow_student(args['name'])
+            else:
+                return self.app.deny_student(args['name'])
+
+        elif args['cmd'] == 'reset':
+            return self.app.reset_password(args['name'])
+
+# ============================================================================
+#   Webserver root
+# ============================================================================
+class Root(object):
+    def __init__(self, app):
+        self.app = app
+        t = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8')
+        self.template = {
+            'login': t.get_template('/login.html'),
+            'test':  t.get_template('/test.html'),
+            'grade': t.get_template('/grade.html'),
+            'admin': t.get_template('/admin.html'),
+        }
-    # --- STUDENTS -----------------------------------------------------------
     @cherrypy.expose
     @require()
-    def students(self, **reset_pw):
-        uid = cherrypy.session.get('userid')
-        if uid != '0':
-            raise cherrypy.HTTPRedirect('/')  #FIXME use authorization @require(admin)
+    def default(self, **args):
+        uid = cherrypy.session.get(SESSION_KEY)
+        if uid == '0':
+            raise cherrypy.HTTPRedirect('/admin')
+        else:
+            raise cherrypy.HTTPRedirect('/test')
+        # # FIXME
+        # title = self.app.testfactory['title']
+        # return '''Start test here: <a href="/test">{}</a>'''.format(title)
+        # # raise cherrypy.HTTPRedirect('/test')
-        if reset_pw:
-            self.database.student_reset_pw(reset_pw)
-            for num in reset_pw:
-                cherrypy.log.error('Password updated for student %s.' % str(num), 'APPLICATION')
-        grades = self.database.test_grades2(self.testconf['ref'])
-        students = self.database.get_students()
+    @cherrypy.expose
+    def login(self, uid=None, pw=None):
+        if uid is None or pw is None:   # first try
+            return self.template['login'].render()
+
+        if self.app.login(uid, pw):     # ok
+            cherrypy.session[SESSION_KEY] = cherrypy.request.login = uid
+            raise cherrypy.HTTPRedirect('/admin') # FIXME
+        else:                           # denied
+            return self.template['login'].render()
-        template = self.templates.get_template('/students.html')
-        return template.render(students=students, tags=self.tags, grades=grades)
-    # --- RESULTS ------------------------------------------------------------
     @cherrypy.expose
     @require()
-    def results(self):
-        if self.testconf.get('practice', False):
-            uid = cherrypy.session.get('userid')
-            name = cherrypy.session.get('name')
-
-            r = self.database.test_grades(self.testconf['ref'])
-            template = self.templates.get_template('/results.html')
-            return template.render(t=self.testconf, results=r, name=name, uid=uid)
-        else:
-            raise cherrypy.HTTPRedirect('/')
+    def logout(self):
+        uid = cherrypy.session.get(SESSION_KEY)
+        cherrypy.lib.sessions.expire()  # session coockie expires client side
+        cherrypy.session[SESSION_KEY] = cherrypy.request.login = None
+        cherrypy.log.error('Student {0} logged out.'.format(uid), 'APPLICATION')
+
+        self.app.logout(uid)
+        raise cherrypy.HTTPRedirect('/')
-    # --- TEST ---------------------------------------------------------------
+
+   # --- TEST ---------------------------------------------------------------
+    # Get student number and assigned questions from current session.
+    # If it's the first time, create instance of the test and register the
+    # time.
     @cherrypy.expose
     @require()
     def test(self):
-        # Get student number and assigned questions from current session.
-        # If it's the first time, create instance of the test and register the
-        # time.
-        uid = cherrypy.session.get('userid')
-        # if uid not in self.tags['allowed']:
-        #     print('not allowed')
-        #     raise cherrypy.HTTPRedirect('/logout')
-        #     return
-        # print(self.tags)
-
-        name = cherrypy.session.get('name')
-        t = cherrypy.session.get('test', None)
-        if t is None:
-            # create instance and add the name and number of the student
-            t = self.testconf.generate(number=uid, name=name)
-            cherrypy.session['test'] = t
-
-            # cherrypy.session['test'] = t = test.Test(self.testconf)
-
-            # t['number'] = uid
-            # t['name'] = name
-            self.tags['online'].add(uid)  # track logged in students
-
-        t.reset_answers()
-        # Generate question
-        template = self.templates.get_template('/test.html')
-        return template.render(t=t)
+        uid = cherrypy.session.get(SESSION_KEY)
+        test = self.app.get_test(uid)
+        if test is None:
+            test = self.app.generate_test(uid)  # try to generate a new test
+
+        return self.template['test'].render(t=test)
     # --- CORRECT ------------------------------------------------------------
     @cherrypy.expose
     @require()
     def correct(self, **kwargs):
-        '''Receives a dictionary {'question_id': 'answer', ...} submited by
-        the student, corrects and saves the answers, computes the final grade
-        of the test and stores in the database.'''
-
-        # shouldn't be here if there is no test
-        t = cherrypy.session.get('test')
-        if t is None:
-            raise cherrypy.HTTPRedirect('/test')
+        # receives dictionary with answers
+        # kwargs = {'answered-xpto': 'on', 'xpto': '13.45', ...}
+        # Format:
+        #   checkbox - all off -> no key, 1 on -> string '0', >1 on -> ['0', '1']
+        #   radio    - all off -> no key, 1 on -> string '0'
+        #   text     - always returns string. no answer '', otherwise 'dskdjs'
+        uid = cherrypy.session.get(SESSION_KEY)
+        student_name = self.app.get_student_name(uid)
+        title = self.app.get_test(uid)['title']
+        qq = self.app.get_test_qtypes(uid)  # {'q1_ref': 'checkbox', ...}
         # each question that is marked to be classified must have an answer.
-        # variable `ans` contains the answers to be corrected
+        # `ans` contains the answers to be corrected. The missing ones were
+        # disabled by the student
         ans = {}
-        for q in t['questions']:
-            if 'answered-' + q['ref'] in kwargs:
-                # HACK: checkboxes in html return None instead of an empty list
-                # we have to manualy replace by []
-                default_ans = [] if q['type'] == 'checkbox' else None
-                ans[q['ref']] = kwargs.get(q['ref'], default_ans)
-
-        # store the answers in the Test, correct it, save JSON and
-        # store results in the database
-        t.update_answers(ans)
-        t.correct()
-
-        if t['save_answers']:
-            fname = ' -- '.join((t['student']['number'], t['ref'], str(t['finish_time']))) + '.json'
-            fpath = path.abspath(path.join(t['answers_dir'], fname))
-            t.save_json(fpath)
-
-        self.database.save_test(t)
-
-        if t['practice']:
-            # ---- Repeat the test ----
-            cherrypy.log.error('Student %s terminated with grade = %.2f points.' %
-                               (t['student']['number'], t['grade']), 'APPLICATION')
-            raise cherrypy.HTTPRedirect('/test')
+        for qref, qtype in qq.items():
+            if 'answered-' + qref in kwargs:
+                # HTML HACK: checkboxes in html return None instead of an empty list if none is selected. Also, if only one is selected returns string instead of list of strings.
+                default_ans = [] if qtype == 'checkbox' else None
+                a = kwargs.get(qref, default_ans)
+                if qtype == 'checkbox' and isinstance(a, str):
+                    a = [a]
+                ans[qref] = a
+
+        grade = self.app.correct_test(uid, ans)
+        self.app.logout(uid)
+
+        # ---- Expire session ----
+        cherrypy.lib.sessions.expire()  # session coockie expires client side
+        cherrypy.session[SESSION_KEY] = cherrypy.request.login = None
+
+        # ---- Show result to student ----
+        return self.template['grade'].render(
+            title=title,
+            student_id=uid + ' - ' + student_name,
+            grade=grade,
+            allgrades=self.app.get_student_grades(uid)
+            )
+
+
+
+    # --- STUDENTS -----------------------------------------------------------
+    @cherrypy.expose
+    @require(name_is('0'))
+    def admin(self, **reset_pw):
+        return self.template['admin'].render(
+            online_students=self.app.get_online_students(),
+            offline_students=self.app.get_offline_students(),
+            allowed_students=self.app.get_allowed_students()
+            )
+        # t = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8').get_template('admin.html')
+        # return t.render(online_students=online_students,
+        #     offline_students=offline_students,
+        #     allowed_students=allowed_students)
+
+
+
+
+
+    # def students(self, **reset_pw):
+        # if reset_pw:
+        #     self.database.student_reset_pw(reset_pw)
+        #     for num in reset_pw:
+        #         cherrypy.log.error('Password updated for student %s.' % str(num), 'APPLICATION')
+
+        # grades = self.database.test_grades2(self.testconf['ref'])
+        # students = self.database.get_students()
+
+        # template = self.templates.get_template('/students.html')
+        # return template.render(students=students, tags=self.tags, grades=grades)
+
+    # --- RESULTS ------------------------------------------------------------
+    # @cherrypy.expose
+    # @require()
+    # def results(self):
+    #     if self.testconf.get('practice', False):
+    #         uid = cherrypy.session.get('userid')
+    #         name = cherrypy.session.get('name')
+
+    #         r = self.database.test_grades(self.testconf['ref'])
+    #         template = self.templates.get_template('/results.html')
+    #         return template.render(t=self.testconf, results=r, name=name, uid=uid)
+    #     else:
+    #         raise cherrypy.HTTPRedirect('/')
+
-        else:
-            # ---- Expire session ----
-            self.tags['online'].discard(t['student']['number'])
-            self.tags['finished'].add(t['student']['number'])
-            cherrypy.lib.sessions.expire()  # session coockie expires client side
-            cherrypy.session['userid'] = cherrypy.request.login = None
-            cherrypy.log.error('Student %s terminated with grade = %.2f points.' %
-                               (t['student']['number'], t['grade']), 'APPLICATION')
-
-            # ---- Show result to student ----
-            grades = self.database.student_grades(t['student']['number'])
-            template = self.templates.get_template('grade.html')
-            return template.render(t=t, allgrades=grades)
 # ============================================================================
 def parse_arguments():
@@ -203,39 +281,70 @@ def parse_arguments():
 # ============================================================================
 if __name__ == '__main__':
-    ch = logging.StreamHandler()
-    ch.setLevel(logging.INFO)
-    ch.setFormatter(logging.Formatter('%(asctime)s | %(name)-10s | %(levelname)-8s | %(message)s'))
-
-    logger = logging.getLogger(__name__)
-    logger.setLevel(logging.INFO)
-    logger.addHandler(ch)
-
-    logger.info('============= Running perguntations =============')
     # --- path where this file is located
     SERVER_PATH = path.dirname(path.realpath(__file__))
     TEMPLATES_DIR = path.join(SERVER_PATH, 'templates')
+    SESSION_KEY = 'userid'
     # --- parse command line arguments and build base test
     arg = parse_arguments()
-    logger.info('Reading test configuration.')
     # FIXME do not send args that were not defined in the commandline
     # this means options should be like --show-ref=true|false
     # and have no default value
     filename = path.abspath(path.expanduser(arg.testfile[0]))
-    testconf = test.TestFactory(filename, conf=vars(arg))
+    try:
+        app = App(filename, vars(arg))
+    except:
+        sys.exit(1)
+
+
+    # testconf = test.TestFactory(filename, conf=vars(arg))
+
     # --- site wide configuration (valid for all apps)
+    cherrypy.tools.secureheaders = cherrypy.Tool('before_finalize', secureheaders, priority=60)
     cherrypy.config.update({'tools.staticdir.root': SERVER_PATH})
     cherrypy.config.update(arg.server)
+    conf = {
+        '/': {
+            # DO NOT DISABLE SESSIONS!
+            'tools.sessions.on': True,
+            'tools.sessions.timeout': 240,
+            'tools.sessions.storage_type': 'ram',
+            'tools.sessions.storage_path': 'sessions',
+            # tools.sessions.secure = True
+            # tools.sessions.httponly = True
+
+            # Authentication
+            'tools.auth.on': True,
+
+            'tools.secureheaders.on': True,
+
+            'tools.staticdir.dir': 'static',  # where to get js,css,jpg,...
+            'tools.staticdir.on': True,
+        },
+        '/adminwebservice': {
+            'request.dispatch': cherrypy.dispatch.MethodDispatcher(),
+            'tools.response_headers.on': True,
+            'tools.response_headers.headers': [('Content-Type', 'text/plain')],
+        },
+        '/static': {
+            'tools.staticdir.dir': './static',  # where to get js,css,jpg,...
+            'tools.staticdir.on': True,
+        }
+    }
+
     # --- app specific configuration
-    app = cherrypy.tree.mount(Root(testconf), '/', arg.server)
+    webapp = Root(app)
+    webapp.adminwebservice = AdminWebService(app)
-    logger.info('Webserver listening at {}:{}'.format(
-        cherrypy.config['server.socket_host'],
-        cherrypy.config['server.socket_port']))
+    cherrypy.tree.mount(webapp, '/', conf)
+
+    # logger.info('Webserver listening at {}:{}'.format(
+    #     cherrypy.config['server.socket_host'],
+    #     cherrypy.config['server.socket_port']))
     if hasattr(cherrypy.engine, "signal_handler"):
         cherrypy.engine.signal_handler.subscribe()
@@ -244,7 +353,6 @@ if __name__ == &#39;__main__&#39;:
     cherrypy.engine.start()
     cherrypy.engine.block()
-
+    # ...App running...
+    app.exit()
     cherrypy.log('Terminated OK ------------------------', 'APPLICATION')
-    print()
-    logger.critical('-------- !!! Server terminated !!! --------')
@@ -0,0 +1,75 @@
+$(document).ready(function() {
+    // button handler to allow all students
+    $("#allowall").click(function(e) {
+        alert('not implemented'); // FIXME
+    });
+
+    // button handler to allow all students
+    $("#denyall").click(function(e) {
+        alert('not implemented'); // FIXME
+    });
+
+    // checkbox event handler to allow/deny students
+    function autorizeStudent(e) {
+        $.ajax({
+            type: "POST",
+            url: "/adminwebservice",
+            data: {"cmd": "allow", "name": this.name, "value": this.checked}
+        });
+        if (this.checked)
+            $(this).parent().parent().addClass("active");
+        else
+            $(this).parent().parent().removeClass("active");
+    }
+
+    // button handler to reset student password
+    function resetPassword(e) {
+        $.ajax({
+            type: "POST",
+            url: "/adminwebservice",
+            data: {"cmd": "reset", "name": this.value}
+        });
+    }
+
+    function populateOnlineTable(online) {
+        $("#online-header").html(online.length + " Activo(s)");
+        var rows = "";
+        $.each(online, function(i, r) {
+            rows += "<tr><td>" + r[0] + "</td><td>" + r[1] + "</td><td>" + r[2].slice(0,19) + "</td></tr>";
+        });
+        $("#online_students").html(rows);
+    }
+
+    function populateOfflineTable(offline, allowed) {
+        $("#offline-header").html(offline.length + " Inactivo(s)")
+        var rows = "";
+        $.each(offline, function(i, r) {
+            rows += '<tr id="' + r[0] + '" + class="' + (allowed.indexOf(r[0]) > -1? 'active':'') + '">\
+                <td><input type="checkbox" name="' + r[0] + '" value="true"' + (allowed.indexOf(r[0]) > -1? 'checked':'') + '></td>\
+                <td>' + r[0] + '</td>\
+                <td>' + r[1] + '</td>\
+                <td><button name="reset" value="' + r[0] + '" class="btn btn-xs btn-danger">reset</button></td>\
+                </tr>';
+        });
+        $("#offline_students").html(rows);
+    }
+
+    function populate() {
+        $.ajax({
+            url: "/adminwebservice",
+            dataType: "json",
+            success: function(data) {
+                populateOnlineTable(data["online"]);
+                populateOfflineTable(data["offline"], data["allowed"]);
+
+                // add event handlers
+                $('input[type="checkbox"]').change(autorizeStudent);
+                $('button[name="reset"]').click(resetPassword);
+            },
+            error: function() {alert("Servidor não responde.");}
+        });
+    }
+
+    populate();                   // run once when the page is loaded
+    setInterval(populate, 5000);  // poll server on 5s interval
+});
@@ -0,0 +1,7 @@
+/*!
+ * Bootstrap v3.3.6 (http://getbootstrap.com)
+ * Copyright 2011-2015 Twitter, Inc.
+ * Licensed under the MIT license
+ */
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a(b.target).is(this)?b.handleObj.handler.apply(this,arguments):void 0}})})}(jQuery),+function(a){"use strict";function b(b){return this.each(function(){var c=a(this),e=c.data("bs.alert");e||c.data("bs.alert",e=new d(this)),"string"==typeof b&&e[b].call(c)})}var c='[data-dismiss="alert"]',d=function(b){a(b).on("click",c,this.close)};d.VERSION="3.3.6",d.TRANSITION_DURATION=150,d.prototype.close=function(b){function c(){g.detach().trigger("closed.bs.alert").remove()}var e=a(this),f=e.attr("data-target");f||(f=e.attr("href"),f=f&&f.replace(/.*(?=#[^\s]*$)/,""));var g=a(f);b&&b.preventDefault(),g.length||(g=e.closest(".alert")),g.trigger(b=a.Event("close.bs.alert")),b.isDefaultPrevented()||(g.removeClass("in"),a.support.transition&&g.hasClass("fade")?g.one("bsTransitionEnd",c).emulateTransitionEnd(d.TRANSITION_DURATION):c())};var e=a.fn.alert;a.fn.alert=b,a.fn.alert.Constructor=d,a.fn.alert.noConflict=function(){return 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-jquery-2.1.4.min.js
 \ No newline at end of file
+jquery-2.2.4.min.js
 \ No newline at end of file
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title> List of students </title>
+    <link rel="icon" href="favicon.ico">
+
+    <!-- Bootstrap -->
+    <link rel="stylesheet" href="/css/bootstrap.min.css">
+    <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <!-- optional -->
+
+    <script src="/js/jquery.min.js"></script>
+    <script src="/js/bootstrap.min.js"></script>
+
+    <style>
+        /* Fixes navigation panel overlaying content */
+        body {
+            padding-top: 80px;
+            background: #888;
+        }
+        .drop-shadow {
+            -webkit-box-shadow: 0 0 5px 2px rgba(0, 0, 0, .5);
+            box-shadow: 0px 2px 10px 3px rgba(0, 0, 0, .2);
+            border-radius:5px;
+        }
+    </style>
+
+    <script src="/js/admin.js"></script>
+</head>
+<!-- ===================================================================== -->
+<body>
+
+<div class="container">
+
+    <div class="panel panel-success drop-shadow">
+        <div id="online-header" class="panel-heading">
+            Activo(s)
+        </div>
+        <div class="panel-body">
+            <table class="table table-condensed">
+                <thead>
+                    <tr>
+                        <th>Número</th>
+                        <th>Nome</th>
+                        <th>Início do teste</th>
+                    </tr>
+                </thead>
+                <tbody id="online_students">
+                    <!-- to be populated -->
+                </tbody>
+            </table>
+        </div>
+    </div>
+
+    <div class="panel panel-primary drop-shadow">
+        <div id="offline-header" class="panel-heading">
+            Inactivo(s)
+        </div>
+        <div class="panel-body">
+            <table class="table table-condensed">
+                <thead>
+                    <tr>
+                        <th>Autorizado</th>
+                        <th>Número</th>
+                        <th>Nome</th>
+                        <th>Password</th>
+                    </tr>
+                </thead>
+                <tbody id="offline_students">
+                    <!-- to be populated -->
+                </tbody>
+            </table>
+        </div>
+    </div>
+
+</div> <!-- container -->
+</body>
+</html>
@@ -4,20 +4,20 @@
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title> ${t['title']} </title>
-    <link rel="icon" href="favicon.ico">
+    <title> ${title} </title>
+    <link rel="icon" href="/static/favicon.ico">
     <!-- Bootstrap -->
-    <link rel="stylesheet" href="/css/bootstrap.min.css">
-    <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <!-- optional -->
+    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
+    <link rel="stylesheet" href="/static/css/bootstrap-theme.min.css"> <!-- optional -->
 <!--     <link rel="stylesheet" href="/js/jquery/jquery.mobile-1.4.5.min.css" />
     <script src="/js/jquery/jquery-2.1.1.min.js"></script>
     <script src="/js/jquery/jquery.mobile-1.4.5.min.js"></script>
  -->
-    <script src="/js/jquery.min.js"></script>
-    <script src="/js/bootstrap.min.js"></script>
+    <script src="/static/js/jquery.min.js"></script>
+    <script src="/static/js/bootstrap.min.js"></script>
     <style>
         /* Fixes navigation panel overlaying content */
@@ -54,7 +54,7 @@
  -->
       <ul class="nav navbar-nav navbar-right">
         <li class="dropdown">
-          <a class="dropdown-toggle" data-toggle="dropdown" href="#">${t['student']['number']} - ${t['student']['name']} <span class="caret"></span></a>
+          <a class="dropdown-toggle" data-toggle="dropdown" href="#">${student_id} <span class="caret"></span></a>
 <!--           <ul class="dropdown-menu">
             <li><a href="#">Toggle colors (day/night)</a></li>
             <li><a href="#">Change password</a></li>
@@ -68,17 +68,15 @@
 <div class="container">
     <div class="jumbotron drop-shadow">
       <h1>Resultado</h1>
-      <p>Teve <strong>${'{:.1f}'.format(t['grade'])}</strong> valores na escala de 0 a 20.</p>
-      <p>Pode desligar o computador.</p>
-      <!-- <p><a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a></p> -->
+      <p>Teve <strong>${'{}'.format(grade)}</strong> valores na escala de 0 a 20.</p>
+      <p>A prova está terminada, pode fechar o browser e desligar o computador.</p>
     </div>
     <div class="panel panel-default drop-shadow">
         <div class="panel-heading">
             Testes realizados
         </div>
-        <!-- <div class="panel-body"> -->
-        <table class="table">
+        <table class="table table-condensed">
             <thead>
                 <tr>
                     <th>Data</th>
@@ -88,48 +86,27 @@
                 </tr>
             </thead>
             <tbody>
-                 % for g in allgrades:
-                <tr>
-                    <td>${g[2][:10]}</td>  <!-- data -->
-                    <td>${g[2][11:19]}</td>  <!-- hora -->
-                    <td>${g[0]}</td>  <!-- teste -->
-                    <td>
-                        <div class="progress">
-                            % if g[1] < 10:
-                                <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
-                            % elif g[1] < 15:
-                                <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
-                            % else:
-                                <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
-                            % endif
-                            ${'{:.1f}'.format(g[1])}
+                % for g in allgrades:
+                    <tr>
+                        <td>${g[2][:10]}</td>  <!-- data -->
+                        <td>${g[2][11:19]}</td>  <!-- hora -->
+                        <td>${g[0]}</td>  <!-- teste -->
+                        <td>
+                            <div class="progress">
+                                % if g[1] < 10:
+                                    <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
+                                % elif g[1] < 15:
+                                    <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
+                                % else:
+                                    <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="${'{0}'.format(round(g[1]))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * g[1]))}%;">
+                                % endif
+                                ${'{:.1f}'.format(g[1])}
+                                </div>
                             </div>
-                        </div>
-                    </td>
-                </tr>
-                 % endfor
+                        </td>
+                    </tr>
+                % endfor
             </tbody>
-<!--             <tfoot>
-                <tr>
-                    <th>Média (não ponderada)</th>
-                    <th colspan="2">
-                        <div class="progress">
-                            <%
-                                media = sum(x[1] for x in allgrades) / len(allgrades)
-                            %>
-                            % if media < 10:
-                                <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="${'{0}'.format(round(media))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * media))}%;">
-                            % elif media < 15:
-                                <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="${'{0}'.format(round(media))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * media))}%;">
-                            % else:
-                                <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="${'{0}'.format(round(media))}" aria-valuemin="0" aria-valuemax="20" style="min-width: 2em; width: ${'{0}'.format(round(5 * media))}%;">
-                            % endif
-                                    ${'{:.1f}'.format(media)} valores
-                                </div>
-                        </div>
-                    </th>
-                </tr>
-            </tfoot> -->
         </table>
     </div> <!-- panel -->
 </div> <!-- container -->
@@ -6,9 +6,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="description" content="" />
     <meta name="author" content="" />
-    <link rel="icon" href="/favicon.ico" />
+    <link rel="icon" href="/static/favicon.ico" />
-<!-- MathJax -->
+    <!-- MathJax -->
     <script type="text/x-mathjax-config">
         MathJax.Hub.Config({
             extensions: ["tex2jax.js"],
@@ -16,26 +16,17 @@
             tex2jax: {inlineMath: [["$$$","$$$"], ["$","$"], ["\\(","\\)"]]}
         });
     </script>
-    <script type="text/javascript" src="/js/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
+    <script type="text/javascript" src="/static/js/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
     </script>
     <title>UEvora</title>
-    <!-- Bootstrap core CSS -->
-    <link rel="stylesheet" href="/css/bootstrap.min.css">
-    <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <!-- optional -->
+    <!-- Bootstrap -->
+    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
+    <link rel="stylesheet" href="/static/css/bootstrap-theme.min.css"> <!-- optional -->
-    <!-- Custom styles for this template -->
-    <!-- <link href="/css/signin.css" rel="stylesheet"> -->
-
-    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
-    <!--[if lt IE 9]>
-      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
-      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
-    <![endif]-->
-
-    <script src="/js/jquery.min.js"></script>
-    <script src="/js/bootstrap.min.js"></script>
+    <script src="/static/js/jquery.min.js"></script>
+    <script src="/static/js/bootstrap.min.js"></script>
     <style>
       /* Fixes navigation panel overlaying content */
@@ -60,7 +51,7 @@
       <div class="well drop-shadow">
         <div class="row voffset">
           <div class="col-xs-4">
-            <img src="/logo_horizontal.png" class="img-responsive" />
+            <img src="/static/logo_horizontal.png" class="img-responsive" />
           </div>
           <div class="col-xs-4">
@@ -68,8 +59,7 @@
           <div class="col-xs-4">
           <h4>Identificação:</h4>
-            <form method="post" action="/auth/login" class="form-signin">
-              <input type="hidden" name="from_page" value="${from_page}">
+            <form method="post" action="/login" class="form-signin">
               <div class="form-group">
                 <input type="text" name="uid" class="form-control" placeholder="Número" required autofocus>
                 <input type="password" name="pw" class="form-control" placeholder="Password" required>
@@ -81,7 +71,7 @@
           </div>
         </div>
       </div>
-    </div> <!-- /container -->
+    </div> <!-- container -->
   </body>
 </html>
 </body>
@@ -5,7 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title> ${t['title']} </title>
-    <link rel="icon" href="/favicon.ico">
+    <link rel="icon" href="/static/favicon.ico">
 <!-- MathJax -->
     <script type="text/x-mathjax-config">
@@ -18,22 +18,16 @@
     </script>
 <!-- Bootstrap -->
-    <link rel="stylesheet" href="/css/bootstrap.min.css">
-    <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <!-- optional -->
-    <link rel="stylesheet" href="/css/github.css">  <!-- syntax highlight -->
-    <link rel="stylesheet" href="/css/sticky-footer-navbar.css">
+    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
+    <link rel="stylesheet" href="/static/css/bootstrap-theme.min.css"> <!-- optional -->
+    <link rel="stylesheet" href="/static/css/github.css">  <!-- syntax highlight -->
+    <link rel="stylesheet" href="/static/css/sticky-footer-navbar.css">
-    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
-    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
-    <!--[if lt IE 9]>
-      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
-      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
-    <![endif]-->
-    <script src="/js/jquery.min.js"></script>
-    <script src="/js/bootstrap.min.js"></script>
+    <script src="/static/js/jquery.min.js"></script>
+    <script src="/static/js/bootstrap.min.js"></script>
 <!-- My javascripts -->
-    <script src="/js/question_disabler.js"></script>
+    <script src="/static/js/question_disabler.js"></script>
     <style>
         /* Fixes navigation panel overlaying content */
         body {
@@ -17,14 +17,9 @@ logger.addHandler(ch)
 try:
     import yaml
-except ImportError:
-    logger.critical('The package "yaml" is missing. See README.md for instructions.')
-    sys.exit(1)
-
-try:
     import json
 except ImportError:
-    logger.critical('The package "json" is missing. See README.md for instructions.')
+    logger.critical('Python package missing. See README.md for instructions.')
     sys.exit(1)
 # my code
@@ -88,7 +83,13 @@ class TestFactory(dict):
         self.question_factory = questions.QuestionFactory()
         self.question_factory.load_files(files=self['files'], questions_dir=self['questions_dir'])
-        logger.info('Test factory ready.')
+        # check if all questions exist ('ref' keys are correct?)
+        for q in self['questions']:
+            for r in q['ref']:
+                if r not in self.question_factory:
+                    logger.error('Can''t find question "{}".'.format(r))
+
+        logger.info('Test factory ready for "{}".'.format(self['ref']))
     # -----------------------------------------------------------------------
@@ -96,6 +97,7 @@ class TestFactory(dict):
     # It merges conf with the current configuration and performs some checks
     # -----------------------------------------------------------------------
     def configure(self, conf={}):
+        logger.debug('Test factory configuration.')
         self.update(conf)
         # check for important missing keys in the test configuration file
@@ -175,9 +177,10 @@ class TestFactory(dict):
             self['questions'][i] = q
     # -----------------------------------------------------------------------
-    # Return instance of a test for a particular student
+    # Given a dictionary with a student id {'name':'john', 'number': 123}
+    # returns instance of Test() for that particular student
     # -----------------------------------------------------------------------
-    def generate(self, **student):
+    def generate(self, student):
         test = []
         n = 1
         for i, qq in enumerate(self['questions']):
@@ -224,32 +227,35 @@ class TestFactory(dict):
 # a single student. It must/will contain at least these keys:
 #   start_time, finish_time, questions, grade [0,20]
 # Note: for the save_json() function other keys are required
+# Note: grades are rounded to 1 decimal point: 0.0 - 20.0
 # ===========================================================================
 class Test(dict):
     # -----------------------------------------------------------------------
     def __init__(self, d):
         super().__init__(d)
-        self.reset_answers()
         self['start_time'] = datetime.now()
         self['finish_time'] = None
-        logger.info('Start test for student {}.'.format(self['student']['number']))
+        logger.info('Student {}:  starting test.'.format(self['student']['number']))
     # -----------------------------------------------------------------------
+    # Removes all answers from the test (clean)
     def reset_answers(self):
         for q in self['questions']:
             q['answer'] = None
+        logger.info('Student {}:  all answers cleared.'.format(self['student']['number']))
     # -----------------------------------------------------------------------
+    # Given a dictionary ans={'someref': 'some answer'} updates the
+    # answers of the test. Only affects questions referred.
     def update_answers(self, ans):
-        # Given a dictionary ans={'someref': 'some answer'} updates the
-        # answers of the test. Only affects questions referred.
         for q in self['questions']:
             if q['ref'] in ans:
                 q['answer'] = ans[q['ref']]
+        logger.info('Student {}:  answers updated.'.format(self['student']['number']))
     # -----------------------------------------------------------------------
+    # Corrects all the answers and computes the final grade
     def correct(self):
-        # Corrects all the answers and computes the final grade
         self['finish_time'] = datetime.now()
         grade = 0.0
@@ -258,8 +264,8 @@ class Test(dict):
             grade += q.correct() * q['points']
             total_points += q['points']
-        self['grade'] = 20.0 * max(grade / total_points, 0.0)
-        logger.info('Finish test for student {0}. Grade={1}.'.format(self['student']['number'], self['grade']))
+        self['grade'] = round(20.0 * max(grade / total_points, 0.0), 1)
+        logger.info('Student {}:  finished with {} points.'.format(self['student']['number'], self['grade']))
         return self['grade']
     # -----------------------------------------------------------------------
@@ -267,4 +273,4 @@ class Test(dict):
         with open(filepath, 'w') as f:
             json.dump(self, f, indent=2, default=str)
             # HACK default=str is required for datetime objects
-        logger.debug('JSON file saved "{}"'.format(filepath))
+        logger.info('Student {}:  saved JSON file.'.format(self['student']['number']))
1		1
2	# BUGS	2	# BUGS
3		3
4	-- em practice, depois da submissao o teste corrigido perde as respostas anteriores. perguntas estao todas expostas.
5	-- cherrypy faz logs para consola...
6	-- mensagens info nao aparecem no serve.py	4	+- pagina de login nao esta a apresentar bem. parece que precisa de autorizacao para aceder a /static...
7	- usar thread.Lock para aceder a variaveis de estado.	5	- usar thread.Lock para aceder a variaveis de estado.
8	-- ordenar activos por hora de login.
9	-- se no teste uma das "ref" nao existir nos ficheiros de perguntas, rebenta.
10	-- no final do teste (em modo avaliacao) o aluno é removido da lista allowed. para fazer novamente necessita de aprovação do professor.
11	-- mesmo aluno pode entrar várias vezes em simultaneo...
12	-- qd scripts não são executáveis rebenta. Testar isso e dar uma mensagem de erro.
13	-- paths manipulation in strings is unix only ('/something'). use os.path to create paths.
14	-- alunos vêm nota final arredondada às decimas, mas é apenas um arredondamento visual. Pode acontecer o aluno chumbar, mas ver uma nota positiva (e.g. 9.46 mostra 9.5 e presume que esta aprovado). Mostrar 3 casas?
15	-- alunos podem entrar duas vezes em simultaneo. impedir, e permitir ao docente fazer kick-out
16	-- detectar se falta 'correct' nas perguntas.
17	-- check if script to generate questions exist before instantiation.
18	-- testar regex na definicao das perguntas. como se faz rawstring em yaml? singlequote? problemas de backslash??? sim... necessário fazer \\ em varios casos, mas não é claro! e.g. \n é convertido em espaço mas \w é convertido em \\ e w. Solução (http://stackoverflow.com/questions/10771163/python-interpreting-a-regex-from-a-yaml-config-file) é fazer
19	- correct: !!python/regex '^(yes\|no)'
20	-	6	+- permitir adicionar imagens nas perguntas
		7	+- browser e ip usados gravado no test.
		8	+- configuracao dos logs cherrypy para se darem bem com os outros
21		9
22	# TODO	10	# TODO
23		11
24	-- refazer questions.py para ter uma classe QuestionFectory?
25	-- refazer serve.py para usar uma classe App() com lógica separada do cherrypy
26	-- controlar acessos dos alunos: allowed/denied/online threadsafe na App()	12	+- implementar practice mode.
		13	+- SQLAlchemy em vez da classe database.
27	- argumentos da linha de comando a funcionar.	14	- argumentos da linha de comando a funcionar.
28	-- permitir adicionar imagens nas perguntas
29	- aviso na pagina principal para quem usa browser da treta	15	- aviso na pagina principal para quem usa browser da treta
30	-- permitir enviar varios testes, aluno escolhe qual o teste que quer fazer.	16	+- permitir varios testes, aluno escolhe qual o teste que quer fazer.
31	- criar perguntas de outros tipos, e.g. associação, ordenação, varios textinput	17	- criar perguntas de outros tipos, e.g. associação, ordenação, varios textinput
32	-- browser e ip usados gravado no test.	18	+- perguntas para professor corrigir mais tarde.
33	- single page web no frontend	19	- single page web no frontend
34	-- SQLAlchemy em vez da classe database.
35	-- script de correcção pode enviar dicionario yaml com grade e comentarios. ex:
36	- grade: 0.5
37	- comments: Falhou na função xpto.
38	- os comentários são guardados no teste (ficheiro) ou enviados para o browser no modo practice.
39	-- warning quando se executa novamente o mesmo teste na consola. ie se ja houver submissoes desse teste.
40	-- na cotacao da pergunta indicar o intervalo, e.g. [-0.2, 1], [0, 0.5]
41	-- Criar botão para o docente fazer enable/disable do aluno explicitamente (exames presenciais).
42	-- criar script json2md.py ou outra forma de gerar um teste ja realizado	20	+- criar script json2md.py ou outra forma de visualizar um teste ja realizado
43	- Menu para professor com link para /results e /students	21	- Menu para professor com link para /results e /students
44	-- perguntas para professor corrigir mais tarde.
45	-- share do score em /results (email)
46	- fazer uma calculadora javascript e por no menu. surge como modal	22	- fazer uma calculadora javascript e por no menu. surge como modal
		23	+- GeoIP?
		24	+- mostrar botão de reset apenas para alunos com password definida?
47		25
48	# FIXED	26	# FIXED
49		27
50	-- ordenar lista de alunos pelos online/offline, e depois pelo numero.
51	-- hash das passwords concatenadas com salt gerado aleatoriamente. necessario acrescentar salt de cada aluno. gerar salt com os.urandom(256)
52	-- fix ans directory. relative to what?? current dir?
53	-- textarea com opcao de numero de linhas (consoante o programa a desenvolver podem ser necessarias mais ou menos linhas)
54	-- desligar submissao com tecla enter no chrome/mac
55	-- se database for mal configurada, é criada uma base de dados vazia e rebenta na autenticacao.
56	-- questions type script, necessário dar um caminho exacto relativamete ao directorio do server em vez da pergunta. deveria ser possivel mover as perguntas de directorio sem rebentar os caminhos.
57	-- check that files exist in questions generator e correct textarea. add path in test.yaml
58	-- scripts generator and correct should consider the questions path.
59	-- testar envio de parametros para stdin para perguntas tipo generator.
60	-- mathjax e jquery no login
61	-- mostrar erro quando nao consegue importar questions files
62	-- pacotes exactos usados para instalar.
63	-- detectar colisoes nas referencias das perguntas.
64	-- usar pomba da ue moderna.
65	-- /results esta ordenado por numero e nao por data
66	-- numeros das perguntas não fazem sentido quando há caixas de informação (numerar informacao tb?)
67	-- Quando apresenta o teste, preencher com os valores definidos em answer (permite que professor dê informação à partida, e no modo practice fiquem com o preenchido anteriormente)
68	-- information points é definido onde? test.y ou questions.py?
69	-- textarea monospace
70	-- disable tab behavior in textarea.
71	-- command line options --debug --show_points --show_hints --practice_mode
72	-- manual de utilizacao.
73	-- criar pergunta gerada por script externo.
74	-- debug mode
75	-- in the train_mode, there is no way to logout. Add logout option in the menu.
76	-- simplificar a gravacao do teste em json.
77	-- mostrar numero ordem em /results
78	-- modal a pedir confirmação de submissão.
79	-- pontos devem estar normalizados escala 0-20
80	-- mostrar numero de alunos online em /students
81	-- mostrar cotacao das perguntas, show_points, default:False	28	+- Não mostrar Professor nos activos em /admin
		29	+- /admin mostrar actualizações automaticamente?
		30	+- se no teste uma das "ref" nao existir nos ficheiros de perguntas, rebenta.
		31	+- alunos podem estar online, mas browser perder sessao => nao conseguem mais entrar porque a App pensa que estão online. Permitir login e dar o mesmo teste.
		32	+- pagina de management dos alunos.
		33	+ mostrar online ordenados por hora de login, offline por número.
		34	+ permitir reset da pw e allow/disallow
		35	+- script de correcção pode enviar dicionario yaml com grade e comentarios. ex:
		36	+ grade: 0.5
		37	+ comments: Falhou na função xpto.
		38	+ os comentários são guardados no teste (ficheiro) ou enviados para o browser no modo practice.
		39	+- testar regex na definicao das perguntas. como se faz rawstring em yaml?
		40	+ singlequote? problemas de backslash??? sim... necessário fazer \\ em varios casos, mas não é claro! e.g. \n é convertido em espaço mas \w é convertido em \\ e w. Solução (http://stackoverflow.com/questions/10771163/python-interpreting-a-regex-from-a-yaml-config-file) é fazer
		41	+ correct: !regex '^(yes\|no)'
@@ -0,0 +1,162 @@		@@ -0,0 +1,162 @@
	1	+
	2	+
	3	+import logging
	4	+from os import path
	5	+import sqlite3
	6	+
	7	+import bcrypt
	8	+
	9	+import test
	10	+import database
	11	+
	12	+# ============================================================================
	13	+# Application
	14	+# ============================================================================
	15	+class App(object):
	16	+ def __init__(self, filename, conf):
	17	+ # online = {
	18	+ # uid1: {
	19	+ # 'student': {'number': 123, 'name': john},
	20	+ # 'test': ...
	21	+ # }
	22	+ # uid2: {...}
	23	+ # }
	24	+ logger.info('============= Running perguntations =============')
	25	+ self.online = dict() # {uid: {'student':{}}}
	26	+ self.allowed = set([13361,13682]) # '0' is hardcoded to allowed elsewhere
	27	+ self.testfactory = test.TestFactory(filename, conf=conf)
	28	+ self.db = database.Database(self.testfactory['database']) # FIXME
	29	+ try:
	30	+ n = self.db.get_count_students()
	31	+ except sqlite3.OperationalError as e:
	32	+ logger.critical('Database not usable {}.'.format(self.db.db))
	33	+ raise e
	34	+ else:
	35	+ logger.info('Database has {} students registered.'.format(n))
	36	+
	37	+
	38	+ def exit(self):
	39	+ logger.critical('----------- !!! Server terminated !!! -----------')
	40	+
	41	+
	42	+ def login(self, uid, try_pw):
	43	+ if uid not in self.allowed and uid != '0':
	44	+ # not allowed
	45	+ logger.warning('Student {}: not allowed to login.'.format(uid))
	46	+ return False
	47	+
	48	+ student = self.db.get_student(uid)
	49	+ if student is None:
	50	+ # not found
	51	+ logger.warning('Student {}: not found in database.'.format(uid))
	52	+ return False
	53	+
	54	+ # uid found in database
	55	+ name, pw = student
	56	+
	57	+ if pw == '':
	58	+ # update password on first login
	59	+ hashed_pw = bcrypt.hashpw(try_pw.encode('utf-8'), bcrypt.gensalt())
	60	+ self.db.update_password(uid, hashed_pw)
	61	+ logger.warning('Student {}: first login, password updated.'.format(uid))
	62	+ elif bcrypt.hashpw(try_pw.encode('utf-8'), pw) != pw:
	63	+ # wrong password
	64	+ logger.info('Student {}: wrong password.'.format(uid))
	65	+ return False
	66	+
	67	+ # success
	68	+ self.allowed.discard(uid)
	69	+ if uid in self.online:
	70	+ logger.warning('Student {}: already logged in.'.format(uid))
	71	+ else:
	72	+ self.online[uid] = {'student': {'name': name, 'number': uid}}
	73	+ logger.info('Student {}: logged in.'.format(uid))
	74	+ return True
	75	+
	76	+
	77	+ def logout(self, uid):
	78	+ if uid not in self.online:
	79	+ # this should never happen
	80	+ logger.error('Student {}: tried to logout, but is not logged in.'.format(uid))
	81	+ return False
	82	+ else:
	83	+ logger.info('Student {}: logged out.'.format(uid))
	84	+ del self.online[uid]
	85	+ return True
	86	+
	87	+ def generate_test(self, uid):
	88	+ if uid in self.online:
	89	+ logger.info('Student {}: generating new test.'.format(uid))
	90	+ student_id = self.online[uid]['student']
	91	+ self.online[uid]['test'] = self.testfactory.generate(student_id)
	92	+ return self.online[uid]['test']
	93	+ else:
	94	+ logger.error('Student {}: offline, can''t generate test'.format(uid))
	95	+ return None
	96	+
	97	+ def correct_test(self, uid, ans):
	98	+ t = self.online[uid]['test']
	99	+ t.update_answers(ans)
	100	+ grade = t.correct()
	101	+ logger.info('Student {0}: finished with {1} points.'.format(uid, grade))
	102	+
	103	+ if t['save_answers']:
	104	+ fname = ' -- '.join((t['student']['number'], t['ref'], str(t['finish_time']))) + '.json'
	105	+ fpath = path.abspath(path.join(t['answers_dir'], fname))
	106	+ t.save_json(fpath)
	107	+
	108	+ self.db.save_test(t)
	109	+ self.db.save_questions(t)
	110	+ return grade
	111	+
	112	+
	113	+ # --- helpers (getters)
	114	+ def get_student_name(self, uid):
	115	+ return self.online[uid]['student']['name']
	116	+ def get_test(self, uid, default=None):
	117	+ return self.online[uid].get('test', default)
	118	+ def get_test_qtypes(self, uid):
	119	+ return {q['ref']:q['type'] for q in self.online[uid]['test']['questions']}
	120	+ def get_student_grades(self, uid):
	121	+ return self.db.get_student_grades(uid)
	122	+
	123	+ def get_online_students(self):
	124	+ # list of ('uid', 'name', 'start_time') sorted by start time
	125	+ return sorted(
	126	+ ((k, v['student']['name'], str(v.get('test', {}).get('start_time', '---'))) for k,v in self.online.items() if k != '0'),
	127	+ key=lambda k: k[2] # sort key
	128	+ )
	129	+
	130	+ def get_offline_students(self):
	131	+ # list of ('uid', 'name') sorted by number
	132	+ return sorted((s[:2] for s in self.db.get_all_students() if s[0] not in self.online), key=lambda k: k[0])
	133	+
	134	+ # def get_this_students_grades(self):
	135	+ # # list of ('uid', 'name') sorted by number
	136	+ # return self.db.get_students_grades(self.testfactory['ref'])
	137	+
	138	+ def get_allowed_students(self):
	139	+ # set of 'uid' allowed to login
	140	+ return self.allowed
	141	+
	142	+ # --- helpers (change state)
	143	+ def allow_student(self, uid):
	144	+ self.allowed.add(uid)
	145	+ logger.info('Student {}: allowed to login.'.format(uid))
	146	+
	147	+ def deny_student(self, uid):
	148	+ self.allowed.discard(uid)
	149	+ logger.info('Student {}: denied to login'.format(uid))
	150	+
	151	+ def reset_password(self, uid):
	152	+ self.db.reset_password(uid)
	153	+ logger.info('Student {}: password reset to ""'.format(uid))
	154	+
	155	+# ============================================================================
	156	+ch = logging.StreamHandler()
	157	+ch.setLevel(logging.INFO)
	158	+ch.setFormatter(logging.Formatter('%(asctime)s \| %(name)-10s \| %(levelname)-8s \| %(message)s'))
	159	+
	160	+logger = logging.getLogger(__name__)
	161	+logger.setLevel(logging.INFO)
	162	+logger.addHandler(ch)
	@@ -1,169 +0,0 @@	@@ -1,169 +0,0 @@
1	-# -- encoding: utf-8 --
2	-
3	-# TODO:
4	-# - testar logout
5	-# - session fixation
6	-# - member_of...
7	-
8	-import cherrypy
9	-import sqlite3
10	-import bcrypt
11	-from mako.lookup import TemplateLookup
12	-import urllib
13	-import html
14	-from os import path
15	-
16	-# path where this file is located
17	-server_path = path.dirname(path.realpath(__file__))
18	-
19	-SESSION_KEY = 'userid'
20	-
21	-templates = TemplateLookup(directories=[server_path+'/templates'], input_encoding='utf-8')
22	-
23	-
24	-def credentials_ok(uid, password, db):
25	- '''Given a userid, password and database, checks if the userid exists in
26	- the database, a checks if the password is correct. The password is
27	- updated if it's initially empty.
28	- Returns the name of the student on success, otherwise returns None.
29	- '''
30	-
31	- with sqlite3.connect(db) as c:
32	- # search student in database
33	- sql_cmd = 'SELECT name,password FROM students WHERE number=?'
34	- try:
35	- name, pwhash = c.execute(sql_cmd, [uid]).fetchone()
36	- except:
37	- cherrypy.log.error('Student %s not found!' % uid, 'APPLICATION')
38	- return None
39	-
40	- # student found in db
41	- if pwhash == '':
42	- # update password on first login
43	- hashed = bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt())
44	- sql_cmd = 'UPDATE students SET password=? WHERE number=?'
45	- c.execute(sql_cmd, (hashed, uid))
46	- cherrypy.log.error('Student %s updated his password.' % uid, 'APPLICATION')
47	- return name
48	- else:
49	- # check password
50	- if bcrypt.hashpw(password.encode('utf-8'), pwhash) == pwhash:
51	- cherrypy.log.error('Student %s logged in.' % uid, 'APPLICATION')
52	- return name
53	- else:
54	- cherrypy.log.error('Student %s wrong password.' % uid, 'APPLICATION')
55	- return None
56	-
57	-
58	-def check_auth(args, *kwargs):
59	- """A tool that looks in config for 'auth.require'. If found and it
60	- is not None, a login is required and the entry is evaluated as a list of
61	- conditions that the user must fulfill"""
62	- conditions = cherrypy.request.config.get('auth.require', None)
63	- get_parmas = urllib.request.quote(cherrypy.request.request_line.split()[1])
64	- if conditions is not None:
65	- user = cherrypy.session.get(SESSION_KEY, None)
66	-
67	- # if already logged in, must satisfy conditions
68	- # else redirects to login page
69	- if user is not None:
70	- cherrypy.request.login = user
71	- for condition in conditions:
72	- # A condition is just a callable that returns true or false
73	- if not condition():
74	- raise cherrypy.HTTPRedirect("/auth/login?from_page=%s" % get_parmas)
75	- else:
76	- raise cherrypy.HTTPRedirect("/auth/login?from_page=%s" % get_parmas)
77	-
78	-cherrypy.tools.auth = cherrypy.Tool('before_handler', check_auth)
79	-
80	-
81	-def require(*conditions):
82	- """A decorator that appends conditions to the auth.require config
83	- variable."""
84	- def decorate(f):
85	- if not hasattr(f, '_cp_config'):
86	- f._cp_config = dict()
87	- if 'auth.require' not in f._cp_config:
88	- f._cp_config['auth.require'] = []
89	- f._cp_config['auth.require'].extend(conditions)
90	- return f
91	- return decorate
92	-
93	-
94	-# Conditions are callables that return True
95	-# if the user fulfills the conditions they define, False otherwise
96	-#
97	-# They can access the current username as cherrypy.request.login
98	-#
99	-# Define those at will however suits the application.
100	-
101	-def member_of(groupname):
102	- def check():
103	- # replace with actual check if <username> is in <groupname>
104	- return cherrypy.request.login == 'joe' and groupname == 'admin' # FIXME
105	- return check
106	-
107	-
108	-def name_is(reqd_username):
109	- return lambda: reqd_username == cherrypy.request.login
110	-
111	-
112	-# These might be handy
113	-def any_of(*conditions):
114	- """Returns True if any of the conditions match"""
115	- def check():
116	- for c in conditions:
117	- if c():
118	- return True
119	- return False
120	- return check
121	-
122	-
123	-# By default all conditions are required, but this might still be
124	-# needed if you want to use it inside of an any_of(...) condition
125	-def all_of(*conditions):
126	- """Returns True if all of the conditions match"""
127	- def check():
128	- for c in conditions:
129	- if not c():
130	- return False
131	- return True
132	- return check
133	-
134	-
135	-# ============================================================================
136	-class AuthController(object):
137	- def __init__(self, database):
138	- self.database = database
139	-
140	- @cherrypy.expose
141	- def login(self, uid=None, pw=None, from_page='/'):
142	- # XSS vulnerability if from_page is maliciously formed.
143	- # e.g. /auth/login?from_page="/><script>...
144	- # will inject the string "/><string>... into the variable from_page
145	- # of this function. Rendering a login page will then inject (reflect)
146	- # the script. Not sure how serious it can be, since it is not stored
147	- # in the server, only executed on the client browser...
148	- # html.escape will replace > < & etc used in html by < etc
149	- from_page = html.escape(from_page)
150	-
151	- db = self.database
152	- if uid is not None and pw is not None:
153	- name = credentials_ok(uid, pw, db)
154	- if name is not None:
155	- cherrypy.session[SESSION_KEY] = cherrypy.request.login = uid
156	- cherrypy.session['name'] = name
157	- raise cherrypy.HTTPRedirect(from_page)
158	- logintemplate = templates.get_template('/login.html')
159	- return logintemplate.render(from_page=from_page)
160	-
161	- @cherrypy.expose
162	- def logout(self):
163	- # FIXME logout is not working!!!
164	- cherrypy.lib.sessions.expire() # session cookie expires on client
165	- user = cherrypy.session.get(SESSION_KEY, None)
166	- cherrypy.session[SESSION_KEY] = None
167	- if user is not None:
168	- cherrypy.request.login = None
169	- raise cherrypy.HTTPRedirect('/')
1	#!/usr/bin/env python3	1	#!/usr/bin/env python3
2	# -- coding: utf-8 --	2	# -- coding: utf-8 --
3		3
4	-# The program runs a web server where students login to answer a sequence of questions.
5	-# Their grades are automatically calculated and stored in a sqlite3 database.
6		4
7	from os import path	5	from os import path
8	import sys	6	import sys
9	import argparse	7	import argparse
10	-import logging
11	-# from threading import Lock	8	+# import logging
		9	+import html
		10	+import json
12		11
13	try:	12	try:
14	import cherrypy	13	import cherrypy
15	-except ImportError:
16	- print('The package "cherrypy" is missing. See README.md for instructions.')
17	- sys.exit(1)
18	-
19	-try:	14	+ from cherrypy.lib import auth_digest
20	from mako.lookup import TemplateLookup	15	from mako.lookup import TemplateLookup
21	except ImportError:	16	except ImportError:
22	- print('The package "mako" is missing. See README.md for instructions.')	17	+ print('Some python packages are missing. See README.md for instructions.')
23	sys.exit(1)	18	sys.exit(1)
24		19
25	# my code	20	# my code
26	-from myauth import AuthController, require
27	-import test
28	-import database	21	+from app import App
		22	+
		23	+# ============================================================================
		24	+# Authentication
		25	+# ============================================================================
		26	+def check_auth(args, *kwargs):
		27	+ """A tool that looks in config for 'auth.require'. If found and it
		28	+ is not None, a login is required and the entry is evaluated as a list of
		29	+ conditions that the user must fulfill"""
		30	+ conditions = cherrypy.request.config.get('auth.require', None)
		31	+ if conditions is not None:
		32	+ username = cherrypy.session.get(SESSION_KEY)
		33	+ if username:
		34	+ # user logged in
		35	+ cherrypy.request.login = username
		36	+ for condition in conditions:
		37	+ # A condition is just a callable that returns true or false
		38	+ if not condition():
		39	+ raise cherrypy.HTTPRedirect("/")
		40	+ else:
		41	+ # user not currently logged in
		42	+ raise cherrypy.HTTPRedirect("/login")
		43	+cherrypy.tools.auth = cherrypy.Tool('before_handler', check_auth)
		44	+
		45	+
		46	+# A decorator that appends conditions to the auth.require config variable.
		47	+def require(*conditions):
		48	+ def decorate(f):
		49	+ if not hasattr(f, '_cp_config'):
		50	+ f._cp_config = dict()
		51	+ f._cp_config.setdefault('auth.require', []).extend(conditions)
		52	+ return f
		53	+ return decorate
		54	+
		55	+
		56	+def name_is(reqd_username):
		57	+ return lambda: reqd_username == cherrypy.request.login
29		58
30		59
31	# ============================================================================	60	# ============================================================================
32	-# Classes that respond to HTTP	61	+# Improve cherrypy security
		62	+# http://docs.cherrypy.org/en/latest/advanced.html#securing-your-server
33	# ============================================================================	63	# ============================================================================
34	-class Root(object):	64	+def secureheaders():
		65	+ headers = cherrypy.response.headers
		66	+ headers['X-Frame-Options'] = 'DENY'
		67	+ headers['X-XSS-Protection'] = '1; mode=block'
		68	+ headers['Content-Security-Policy'] = "default-src='self'"
		69	+ if (cherrypy.server.ssl_certificate != None and cherrypy.server.ssl_private_key != None):
		70	+ headers['Strict-Transport-Security'] = 'max-age=31536000' # one year
35		71
36	- def __init__(self, testconf):
37	- self.testconf = testconf # base test dict (not instance)
38	- self.database = database.Database(testconf['database'])
39	- self.auth = AuthController(database=testconf['database'])
40	- self.templates = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8')
41	- # FIXME should be in application, not server
42	- # FIXME lock and threading
43	- self.tags = {'allowed': set(['0']), 'online': set(), 'finished': set()}
44	-
45	- # --- DEFAULT ------------------------------------------------------------
46	- # any path, e.g. /xpto/aargh is redirected to the test
47	- # (and possibly through the login first)
48	- @cherrypy.expose
49	- def default(self, *args):
50	- raise cherrypy.HTTPRedirect('/test')
51		72
52	- # --- LOGOUT -------------------------------------------------------------
53	- @cherrypy.expose
54	- @require()
55	- def logout(self):
56	- uid = cherrypy.session.get('userid')
57	- self.tags['online'].discard(uid)
58	- cherrypy.lib.sessions.expire() # session coockie expires client side
59	- cherrypy.session['userid'] = cherrypy.request.login = None
60	- cherrypy.log.error('Student {0} logged out.'.format(uid), 'APPLICATION')
61	- raise cherrypy.HTTPRedirect('/')	73	+# ============================================================================
		74	+# Admin webservice
		75	+# ============================================================================
		76	+class AdminWebService(object):
		77	+ exposed = True
		78	+
		79	+ def __init__(self, app):
		80	+ self.app = app
		81	+
		82	+ @cherrypy.tools.accept(media='application/json')
		83	+ def GET(self):
		84	+ data = {
		85	+ 'online': self.app.get_online_students(),
		86	+ 'offline': self.app.get_offline_students(),
		87	+ 'allowed': list(self.app.get_allowed_students()),
		88	+ # 'finished': self.app.get_this_students_grades()
		89	+ }
		90	+ # print(dict(data['finished']))
		91	+ return json.dumps(data, default=str)
		92	+
		93	+ def POST(self, **args):
		94	+ # print('POST', args) # FIXME
		95	+ if args['cmd'] == 'allow':
		96	+ if args['value'] == 'true':
		97	+ return self.app.allow_student(args['name'])
		98	+ else:
		99	+ return self.app.deny_student(args['name'])
		100	+
		101	+ elif args['cmd'] == 'reset':
		102	+ return self.app.reset_password(args['name'])
		103	+
		104	+# ============================================================================
		105	+# Webserver root
		106	+# ============================================================================
		107	+class Root(object):
		108	+ def __init__(self, app):
		109	+ self.app = app
		110	+ t = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8')
		111	+ self.template = {
		112	+ 'login': t.get_template('/login.html'),
		113	+ 'test': t.get_template('/test.html'),
		114	+ 'grade': t.get_template('/grade.html'),
		115	+ 'admin': t.get_template('/admin.html'),
		116	+ }
62		117
63	- # --- STUDENTS -----------------------------------------------------------
64	@cherrypy.expose	118	@cherrypy.expose
65	@require()	119	@require()
66	- def students(self, **reset_pw):
67	- uid = cherrypy.session.get('userid')
68	- if uid != '0':
69	- raise cherrypy.HTTPRedirect('/') #FIXME use authorization @require(admin)	120	+ def default(self, **args):
		121	+ uid = cherrypy.session.get(SESSION_KEY)
		122	+ if uid == '0':
		123	+ raise cherrypy.HTTPRedirect('/admin')
		124	+ else:
		125	+ raise cherrypy.HTTPRedirect('/test')
		126	+ # # FIXME
		127	+ # title = self.app.testfactory['title']
		128	+ # return '''Start test here: <a href="/test">{}</a>'''.format(title)
		129	+ # # raise cherrypy.HTTPRedirect('/test')
70		130
71	- if reset_pw:
72	- self.database.student_reset_pw(reset_pw)
73	- for num in reset_pw:
74	- cherrypy.log.error('Password updated for student %s.' % str(num), 'APPLICATION')
75		131
76	- grades = self.database.test_grades2(self.testconf['ref'])
77	- students = self.database.get_students()	132	+ @cherrypy.expose
		133	+ def login(self, uid=None, pw=None):
		134	+ if uid is None or pw is None: # first try
		135	+ return self.template['login'].render()
		136	+
		137	+ if self.app.login(uid, pw): # ok
		138	+ cherrypy.session[SESSION_KEY] = cherrypy.request.login = uid
		139	+ raise cherrypy.HTTPRedirect('/admin') # FIXME
		140	+ else: # denied
		141	+ return self.template['login'].render()
78		142
79	- template = self.templates.get_template('/students.html')
80	- return template.render(students=students, tags=self.tags, grades=grades)
81		143
82	- # --- RESULTS ------------------------------------------------------------
83	@cherrypy.expose	144	@cherrypy.expose
84	@require()	145	@require()
85	- def results(self):
86	- if self.testconf.get('practice', False):
87	- uid = cherrypy.session.get('userid')
88	- name = cherrypy.session.get('name')
89	-
90	- r = self.database.test_grades(self.testconf['ref'])
91	- template = self.templates.get_template('/results.html')
92	- return template.render(t=self.testconf, results=r, name=name, uid=uid)
93	- else:
94	- raise cherrypy.HTTPRedirect('/')	146	+ def logout(self):
		147	+ uid = cherrypy.session.get(SESSION_KEY)
		148	+ cherrypy.lib.sessions.expire() # session coockie expires client side
		149	+ cherrypy.session[SESSION_KEY] = cherrypy.request.login = None
		150	+ cherrypy.log.error('Student {0} logged out.'.format(uid), 'APPLICATION')
		151	+
		152	+ self.app.logout(uid)
		153	+ raise cherrypy.HTTPRedirect('/')
95		154
96	- # --- TEST ---------------------------------------------------------------	155	+
		156	+ # --- TEST ---------------------------------------------------------------
		157	+ # Get student number and assigned questions from current session.
		158	+ # If it's the first time, create instance of the test and register the
		159	+ # time.
97	@cherrypy.expose	160	@cherrypy.expose
98	@require()	161	@require()
99	def test(self):	162	def test(self):
100	- # Get student number and assigned questions from current session.
101	- # If it's the first time, create instance of the test and register the
102	- # time.
103	- uid = cherrypy.session.get('userid')
104	- # if uid not in self.tags['allowed']:
105	- # print('not allowed')
106	- # raise cherrypy.HTTPRedirect('/logout')
107	- # return
108	- # print(self.tags)
109	-
110	- name = cherrypy.session.get('name')
111	- t = cherrypy.session.get('test', None)
112	- if t is None:
113	- # create instance and add the name and number of the student
114	- t = self.testconf.generate(number=uid, name=name)
115	- cherrypy.session['test'] = t
116	-
117	- # cherrypy.session['test'] = t = test.Test(self.testconf)
118	-
119	- # t['number'] = uid
120	- # t['name'] = name
121	- self.tags['online'].add(uid) # track logged in students
122	-
123	- t.reset_answers()
124	- # Generate question
125	- template = self.templates.get_template('/test.html')
126	- return template.render(t=t)	163	+ uid = cherrypy.session.get(SESSION_KEY)
		164	+ test = self.app.get_test(uid)
		165	+ if test is None:
		166	+ test = self.app.generate_test(uid) # try to generate a new test
		167	+
		168	+ return self.template['test'].render(t=test)
127		169
128	# --- CORRECT ------------------------------------------------------------	170	# --- CORRECT ------------------------------------------------------------
129	@cherrypy.expose	171	@cherrypy.expose
130	@require()	172	@require()
131	def correct(self, **kwargs):	173	def correct(self, **kwargs):
132	- '''Receives a dictionary {'question_id': 'answer', ...} submited by
133	- the student, corrects and saves the answers, computes the final grade
134	- of the test and stores in the database.'''
135	-
136	- # shouldn't be here if there is no test
137	- t = cherrypy.session.get('test')
138	- if t is None:
139	- raise cherrypy.HTTPRedirect('/test')	174	+ # receives dictionary with answers
		175	+ # kwargs = {'answered-xpto': 'on', 'xpto': '13.45', ...}
		176	+ # Format:
		177	+ # checkbox - all off -> no key, 1 on -> string '0', >1 on -> ['0', '1']
		178	+ # radio - all off -> no key, 1 on -> string '0'
		179	+ # text - always returns string. no answer '', otherwise 'dskdjs'
		180	+ uid = cherrypy.session.get(SESSION_KEY)
		181	+ student_name = self.app.get_student_name(uid)
		182	+ title = self.app.get_test(uid)['title']
		183	+ qq = self.app.get_test_qtypes(uid) # {'q1_ref': 'checkbox', ...}
140		184
141	# each question that is marked to be classified must have an answer.	185	# each question that is marked to be classified must have an answer.
142	- # variable `ans` contains the answers to be corrected	186	+ # `ans` contains the answers to be corrected. The missing ones were
		187	+ # disabled by the student
143	ans = {}	188	ans = {}
144	- for q in t['questions']:
145	- if 'answered-' + q['ref'] in kwargs:
146	- # HACK: checkboxes in html return None instead of an empty list
147	- # we have to manualy replace by []
148	- default_ans = [] if q['type'] == 'checkbox' else None
149	- ans[q['ref']] = kwargs.get(q['ref'], default_ans)
150	-
151	- # store the answers in the Test, correct it, save JSON and
152	- # store results in the database
153	- t.update_answers(ans)
154	- t.correct()
155	-
156	- if t['save_answers']:
157	- fname = ' -- '.join((t['student']['number'], t['ref'], str(t['finish_time']))) + '.json'
158	- fpath = path.abspath(path.join(t['answers_dir'], fname))
159	- t.save_json(fpath)
160	-
161	- self.database.save_test(t)
162	-
163	- if t['practice']:
164	- # ---- Repeat the test ----
165	- cherrypy.log.error('Student %s terminated with grade = %.2f points.' %
166	- (t['student']['number'], t['grade']), 'APPLICATION')
167	- raise cherrypy.HTTPRedirect('/test')	189	+ for qref, qtype in qq.items():
		190	+ if 'answered-' + qref in kwargs:
		191	+ # HTML HACK: checkboxes in html return None instead of an empty list if none is selected. Also, if only one is selected returns string instead of list of strings.
		192	+ default_ans = [] if qtype == 'checkbox' else None
		193	+ a = kwargs.get(qref, default_ans)
		194	+ if qtype == 'checkbox' and isinstance(a, str):
		195	+ a = [a]
		196	+ ans[qref] = a
		197	+
		198	+ grade = self.app.correct_test(uid, ans)
		199	+ self.app.logout(uid)
		200	+
		201	+ # ---- Expire session ----
		202	+ cherrypy.lib.sessions.expire() # session coockie expires client side
		203	+ cherrypy.session[SESSION_KEY] = cherrypy.request.login = None
		204	+
		205	+ # ---- Show result to student ----
		206	+ return self.template['grade'].render(
		207	+ title=title,
		208	+ student_id=uid + ' - ' + student_name,
		209	+ grade=grade,
		210	+ allgrades=self.app.get_student_grades(uid)
		211	+ )
		212	+
		213	+
		214	+
		215	+ # --- STUDENTS -----------------------------------------------------------
		216	+ @cherrypy.expose
		217	+ @require(name_is('0'))
		218	+ def admin(self, **reset_pw):
		219	+ return self.template['admin'].render(
		220	+ online_students=self.app.get_online_students(),
		221	+ offline_students=self.app.get_offline_students(),
		222	+ allowed_students=self.app.get_allowed_students()
		223	+ )
		224	+ # t = TemplateLookup(directories=[TEMPLATES_DIR], input_encoding='utf-8').get_template('admin.html')
		225	+ # return t.render(online_students=online_students,
		226	+ # offline_students=offline_students,
		227	+ # allowed_students=allowed_students)
		228	+
		229	+
		230	+
		231	+
		232	+
		233	+ # def students(self, **reset_pw):
		234	+ # if reset_pw:
		235	+ # self.database.student_reset_pw(reset_pw)
		236	+ # for num in reset_pw:
		237	+ # cherrypy.log.error('Password updated for student %s.' % str(num), 'APPLICATION')
		238	+
		239	+ # grades = self.database.test_grades2(self.testconf['ref'])
		240	+ # students = self.database.get_students()
		241	+
		242	+ # template = self.templates.get_template('/students.html')
		243	+ # return template.render(students=students, tags=self.tags, grades=grades)
		244	+
		245	+ # --- RESULTS ------------------------------------------------------------
		246	+ # @cherrypy.expose
		247	+ # @require()
		248	+ # def results(self):
		249	+ # if self.testconf.get('practice', False):
		250	+ # uid = cherrypy.session.get('userid')
		251	+ # name = cherrypy.session.get('name')
		252	+
		253	+ # r = self.database.test_grades(self.testconf['ref'])
		254	+ # template = self.templates.get_template('/results.html')
		255	+ # return template.render(t=self.testconf, results=r, name=name, uid=uid)
		256	+ # else:
		257	+ # raise cherrypy.HTTPRedirect('/')
		258	+
168		259
169	- else:
170	- # ---- Expire session ----
171	- self.tags['online'].discard(t['student']['number'])
172	- self.tags['finished'].add(t['student']['number'])
173	- cherrypy.lib.sessions.expire() # session coockie expires client side
174	- cherrypy.session['userid'] = cherrypy.request.login = None
175	- cherrypy.log.error('Student %s terminated with grade = %.2f points.' %
176	- (t['student']['number'], t['grade']), 'APPLICATION')
177	-
178	- # ---- Show result to student ----
179	- grades = self.database.student_grades(t['student']['number'])
180	- template = self.templates.get_template('grade.html')
181	- return template.render(t=t, allgrades=grades)
182		260
183	# ============================================================================	261	# ============================================================================
184	def parse_arguments():	262	def parse_arguments():
	@@ -203,39 +281,70 @@ def parse_arguments():		@@ -203,39 +281,70 @@ def parse_arguments():
203	# ============================================================================	281	# ============================================================================
204	if __name__ == '__main__':	282	if __name__ == '__main__':
205		283
206	- ch = logging.StreamHandler()
207	- ch.setLevel(logging.INFO)
208	- ch.setFormatter(logging.Formatter('%(asctime)s \| %(name)-10s \| %(levelname)-8s \| %(message)s'))
209	-
210	- logger = logging.getLogger(__name__)
211	- logger.setLevel(logging.INFO)
212	- logger.addHandler(ch)
213	-
214	- logger.info('============= Running perguntations =============')
215		284
216	# --- path where this file is located	285	# --- path where this file is located
217	SERVER_PATH = path.dirname(path.realpath(__file__))	286	SERVER_PATH = path.dirname(path.realpath(__file__))
218	TEMPLATES_DIR = path.join(SERVER_PATH, 'templates')	287	TEMPLATES_DIR = path.join(SERVER_PATH, 'templates')
		288	+ SESSION_KEY = 'userid'
219		289
220	# --- parse command line arguments and build base test	290	# --- parse command line arguments and build base test
221	arg = parse_arguments()	291	arg = parse_arguments()
222	- logger.info('Reading test configuration.')
223		292
224	# FIXME do not send args that were not defined in the commandline	293	# FIXME do not send args that were not defined in the commandline
225	# this means options should be like --show-ref=true\|false	294	# this means options should be like --show-ref=true\|false
226	# and have no default value	295	# and have no default value
227	filename = path.abspath(path.expanduser(arg.testfile[0]))	296	filename = path.abspath(path.expanduser(arg.testfile[0]))
228	- testconf = test.TestFactory(filename, conf=vars(arg))	297	+ try:
		298	+ app = App(filename, vars(arg))
		299	+ except:
		300	+ sys.exit(1)
		301	+
		302	+
		303	+ # testconf = test.TestFactory(filename, conf=vars(arg))
		304	+
229		305
230	# --- site wide configuration (valid for all apps)	306	# --- site wide configuration (valid for all apps)
		307	+ cherrypy.tools.secureheaders = cherrypy.Tool('before_finalize', secureheaders, priority=60)
231	cherrypy.config.update({'tools.staticdir.root': SERVER_PATH})	308	cherrypy.config.update({'tools.staticdir.root': SERVER_PATH})
232	cherrypy.config.update(arg.server)	309	cherrypy.config.update(arg.server)
		310	+ conf = {
		311	+ '/': {
		312	+ # DO NOT DISABLE SESSIONS!
		313	+ 'tools.sessions.on': True,
		314	+ 'tools.sessions.timeout': 240,
		315	+ 'tools.sessions.storage_type': 'ram',
		316	+ 'tools.sessions.storage_path': 'sessions',
		317	+ # tools.sessions.secure = True
		318	+ # tools.sessions.httponly = True
		319	+
		320	+ # Authentication
		321	+ 'tools.auth.on': True,
		322	+
		323	+ 'tools.secureheaders.on': True,
		324	+
		325	+ 'tools.staticdir.dir': 'static', # where to get js,css,jpg,...
		326	+ 'tools.staticdir.on': True,
		327	+ },
		328	+ '/adminwebservice': {
		329	+ 'request.dispatch': cherrypy.dispatch.MethodDispatcher(),
		330	+ 'tools.response_headers.on': True,
		331	+ 'tools.response_headers.headers': [('Content-Type', 'text/plain')],
		332	+ },
		333	+ '/static': {
		334	+ 'tools.staticdir.dir': './static', # where to get js,css,jpg,...
		335	+ 'tools.staticdir.on': True,
		336	+ }
		337	+ }
		338	+
233	# --- app specific configuration	339	# --- app specific configuration
234	- app = cherrypy.tree.mount(Root(testconf), '/', arg.server)	340	+ webapp = Root(app)
		341	+ webapp.adminwebservice = AdminWebService(app)
235		342
236	- logger.info('Webserver listening at {}:{}'.format(
237	- cherrypy.config['server.socket_host'],
238	- cherrypy.config['server.socket_port']))	343	+ cherrypy.tree.mount(webapp, '/', conf)
		344	+
		345	+ # logger.info('Webserver listening at {}:{}'.format(
		346	+ # cherrypy.config['server.socket_host'],
		347	+ # cherrypy.config['server.socket_port']))
239		348
240	if hasattr(cherrypy.engine, "signal_handler"):	349	if hasattr(cherrypy.engine, "signal_handler"):
241	cherrypy.engine.signal_handler.subscribe()	350	cherrypy.engine.signal_handler.subscribe()
	@@ -244,7 +353,6 @@ if __name__ == '__main__':		@@ -244,7 +353,6 @@ if __name__ == '__main__':
244		353
245	cherrypy.engine.start()	354	cherrypy.engine.start()
246	cherrypy.engine.block()	355	cherrypy.engine.block()
247	-	356	+ # ...App running...
		357	+ app.exit()
248	cherrypy.log('Terminated OK ------------------------', 'APPLICATION')	358	cherrypy.log('Terminated OK ------------------------', 'APPLICATION')
249	- print()
250	- logger.critical('-------- !!! Server terminated !!! --------')
@@ -0,0 +1,75 @@		@@ -0,0 +1,75 @@
	1	+$(document).ready(function() {
	2	+ // button handler to allow all students
	3	+ $("#allowall").click(function(e) {
	4	+ alert('not implemented'); // FIXME
	5	+ });
	6	+
	7	+ // button handler to allow all students
	8	+ $("#denyall").click(function(e) {
	9	+ alert('not implemented'); // FIXME
	10	+ });
	11	+
	12	+ // checkbox event handler to allow/deny students
	13	+ function autorizeStudent(e) {
	14	+ $.ajax({
	15	+ type: "POST",
	16	+ url: "/adminwebservice",
	17	+ data: {"cmd": "allow", "name": this.name, "value": this.checked}
	18	+ });
	19	+ if (this.checked)
	20	+ $(this).parent().parent().addClass("active");
	21	+ else
	22	+ $(this).parent().parent().removeClass("active");
	23	+ }
	24	+
	25	+ // button handler to reset student password
	26	+ function resetPassword(e) {
	27	+ $.ajax({
	28	+ type: "POST",
	29	+ url: "/adminwebservice",
	30	+ data: {"cmd": "reset", "name": this.value}
	31	+ });
	32	+ }
	33	+
	34	+ function populateOnlineTable(online) {
	35	+ $("#online-header").html(online.length + " Activo(s)");
	36	+ var rows = "";
	37	+ $.each(online, function(i, r) {
	38	+ rows += "<tr><td>" + r[0] + "</td><td>" + r[1] + "</td><td>" + r[2].slice(0,19) + "</td></tr>";
	39	+ });
	40	+ $("#online_students").html(rows);
	41	+ }
	42	+
	43	+ function populateOfflineTable(offline, allowed) {
	44	+ $("#offline-header").html(offline.length + " Inactivo(s)")
	45	+ var rows = "";
	46	+ $.each(offline, function(i, r) {
	47	+ rows += '<tr id="' + r[0] + '" + class="' + (allowed.indexOf(r[0]) > -1? 'active':'') + '">\
	48	+ <td><input type="checkbox" name="' + r[0] + '" value="true"' + (allowed.indexOf(r[0]) > -1? 'checked':'') + '></td>\
	49	+ <td>' + r[0] + '</td>\
	50	+ <td>' + r[1] + '</td>\
	51	+ <td><button name="reset" value="' + r[0] + '" class="btn btn-xs btn-danger">reset</button></td>\
	52	+ </tr>';
	53	+ });
	54	+ $("#offline_students").html(rows);
	55	+ }
	56	+
	57	+ function populate() {
	58	+ $.ajax({
	59	+ url: "/adminwebservice",
	60	+ dataType: "json",
	61	+ success: function(data) {
	62	+ populateOnlineTable(data["online"]);
	63	+ populateOfflineTable(data["offline"], data["allowed"]);
	64	+
	65	+ // add event handlers
	66	+ $('input[type="checkbox"]').change(autorizeStudent);
	67	+ $('button[name="reset"]').click(resetPassword);
	68	+ },
	69	+ error: function() {alert("Servidor não responde.");}
	70	+ });
	71	+ }
	72	+
	73	+ populate(); // run once when the page is loaded
	74	+ setInterval(populate, 5000); // poll server on 5s interval
	75	+});
	@@ -0,0 +1 @@		@@ -0,0 +1 @@
		1	+bootstrap-3.3.6.min.js
0	\ No newline at end of file	2	\ No newline at end of file
1	-jquery-2.1.4.min.js
2	\ No newline at end of file	1	\ No newline at end of file
		2	+jquery-2.2.4.min.js
3	\ No newline at end of file	3	\ No newline at end of file
@@ -0,0 +1,80 @@		@@ -0,0 +1,80 @@
	1	+<!DOCTYPE html>
	2	+<html>
	3	+<head>
	4	+ <meta charset="UTF-8">
	5	+ <meta http-equiv="X-UA-Compatible" content="IE=edge">
	6	+ <meta name="viewport" content="width=device-width, initial-scale=1">
	7	+ <title> List of students </title>
	8	+ <link rel="icon" href="favicon.ico">
	9	+
	10	+ <!-- Bootstrap -->
	11	+ <link rel="stylesheet" href="/css/bootstrap.min.css">
	12	+ <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <!-- optional -->
	13	+
	14	+ <script src="/js/jquery.min.js"></script>
	15	+ <script src="/js/bootstrap.min.js"></script>
	16	+
	17	+ <style>
	18	+ /* Fixes navigation panel overlaying content */
	19	+ body {
	20	+ padding-top: 80px;
	21	+ background: #888;
	22	+ }
	23	+ .drop-shadow {
	24	+ -webkit-box-shadow: 0 0 5px 2px rgba(0, 0, 0, .5);
	25	+ box-shadow: 0px 2px 10px 3px rgba(0, 0, 0, .2);
	26	+ border-radius:5px;
	27	+ }
	28	+ </style>
	29	+
	30	+ <script src="/js/admin.js"></script>
	31	+</head>
	32	+<!-- ===================================================================== -->
	33	+<body>
	34	+
	35	+<div class="container">
	36	+
	37	+ <div class="panel panel-success drop-shadow">
	38	+ <div id="online-header" class="panel-heading">
	39	+ Activo(s)
	40	+ </div>
	41	+ <div class="panel-body">
	42	+ <table class="table table-condensed">
	43	+ <thead>
	44	+ <tr>
	45	+ <th>Número</th>
	46	+ <th>Nome</th>
	47	+ <th>Início do teste</th>
	48	+ </tr>
	49	+ </thead>
	50	+ <tbody id="online_students">
	51	+ <!-- to be populated -->
	52	+ </tbody>
	53	+ </table>
	54	+ </div>
	55	+ </div>
	56	+
	57	+ <div class="panel panel-primary drop-shadow">
	58	+ <div id="offline-header" class="panel-heading">
	59	+ Inactivo(s)
	60	+ </div>
	61	+ <div class="panel-body">
	62	+ <table class="table table-condensed">
	63	+ <thead>
	64	+ <tr>
	65	+ <th>Autorizado</th>
	66	+ <th>Número</th>
	67	+ <th>Nome</th>
	68	+ <th>Password</th>
	69	+ </tr>
	70	+ </thead>
	71	+ <tbody id="offline_students">
	72	+ <!-- to be populated -->
	73	+ </tbody>
	74	+ </table>
	75	+ </div>
	76	+ </div>
	77	+
	78	+</div> <!-- container -->
	79	+</body>
	80	+</html>