/usr/lib/python2.7/dist-packages/ControlAula/TeacherMainLoop.py is in controlaula 1.8.0-3.1.
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# -*- coding: utf-8 -*-
# Project: Controlaula
# Module: TeacherMainLoop.py
# Purpose: ControlAula server for the Teacher functions
# Language: Python 2.5
# Date: 18-Jan-2010.
# Ver: 3-Feb-2010.
# Author: José L. Redrejo Rodríguez
# Copyright: 2009-2010 - José L. Redrejo Rodríguez <jredrejo @nospam@ debian.org>
#
# ControlAula is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# ControlAula is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with ControlAula. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
from twisted.web import server, resource, static
import twisted
from ControlAula.Plugins import Handler
from ControlAula.Utils import Configs, MyUtils
import cgi
import simplejson as json
import os,logging
import TeacherServer
from collections import defaultdict
from time import strftime,time
from urllib import unquote
class ControlAulaProtocol(resource.Resource):
"""Respond with the appropriate ControlAUla protocol response.
A GET should return a file. A POST should use JSON to retrieve and send data
"""
isLeaf = True # This is a resource end point.
def __init__ (self):
resource.Resource.__init__(self)
self.PageDir=""
self.teacher = TeacherServer.RPCServer()
self.channels = defaultdict(list)
self.publish_service=None
self.teacher_login=''
########################################################
# Return the page for a GET. This will handle requests
# to read data.
def render_GET(self, request):
pagename = request.path[1:].lower()
session = request.getSession()
if 'controlaula/' in pagename:
if Configs.TEACHER_UID == pagename[12:]:
self.teacher_login = Configs.TEACHER_UID
session.uid = Configs.TEACHER_UID
request.redirect('/index.html')
return '{}'
else:
request.redirect('/student/chat.html')
return '{}'
if pagename == '':
request.path='/index.html'
pagename='index.html'
#if (request.host.host!='127.0.0.1' or self.teacher_login!=session.uid) and pagename=='index.html':
if (request.host.host!='127.0.0.1' or self.teacher_login!=session.uid) and (pagename[-4:] == 'html' or pagename[-1:] == '/'):
request.path='/student/chat.html'
pagename='student/chat.html'
#Announce the teacher after the first try of accesing the web interface
if not self.publish_service.online:
self.publish_service.publish()
# Check if requested file exists.
if request.path[:13]=='/loginimages/' or request.path[:10]=='/sendfile/':
requestedfile=os.path.join(Configs.APP_DIR ,request.path[1:])
elif '/controlaula-chat' in request.path:
self.channels['controlaula-chat'].append(request)
return server.NOT_DONE_YET
elif request.path[:9]=='/student/':
requestedfile = os.path.join(self.PageDir,request.path[9:])
else:
requestedfile = os.path.join(self.PageDir,request.path[1:])
if pagename == "controlaula":
requestedfile=os.path.join(Configs.APP_DIR,'controlaula.html')
requestedfile=unquote(requestedfile)
if not os.path.isfile(requestedfile):
# Didn't find it? Return an error.
request.setResponseCode(404)
return"""
<html><head><title>404 - No Such Resource</title></head>
<body><h1>No Such Resource</h1>
<p>File not found: %s - No such file.</p></body></html>
""" % requestedfile
# Look for the requested file.
f=static.File(requestedfile)
if f.type is None:
f.type, f.encoding = static.getTypeAndEncoding(requestedfile,
f.contentTypes,
f.contentEncodings,
f.defaultType)
if f.type:
ctype=f.type.split(":")[0]
# Send the headers.
request.setHeader('content-type', ctype)
if f.encoding:
request.setHeader('content-encoding', f.encoding)
# Send the page.
if twisted.version.major >= 9:
static.NoRangeStaticProducer(request,f.openForReading()).start()
else:
static.FileTransfer(f.openForReading(), f.getFileSize(), request)
return server.NOT_DONE_YET
def render_POST(self, request):
""" Process a POST and return a response. This will handle
all the AJAX read and write requests for data.
"""
if request.path=='/RPC2':
return self.teacher.render(request)
elif request.path == '/BROWSER':
filter_port = request.client.port
data_to_return = MyUtils.launcherData(str(filter_port))
return json.dumps(data_to_return)
#Filter the command needed.
command=request.path[1:]
handler=Handler.Plugins(self.teacher.classroom)
respjson=None
args=''
#print command
if 'controlaula-chat' in request.path:
return self._handle_chat(request)
#petition from the student controlaula
student_asks=(request.path[:9]=='/student/')
if student_asks:
command=command.replace('student/','')
if command=='':
return self._handle_chat(request)
try:
recvjson='{}'
request.content.read()
if request.args.has_key('data'):
recvjson = request.args['data'][0]
if recvjson=='':
recvjson='{}'
if json.loads(recvjson).has_key('args'):
args=json.loads(recvjson)['args']
except:
pass
if command=='index.html':
if args==Configs.TEACHER_UID:
session = request.getSession()
self.teacher_login=session.uid
request.redirect('index.html')
return '{}'
if args=='':
try:
if 'dir' in request.args:
args=request.args['dir']
elif 'message' in request.args:
args=request.args['message']
except:
pass
if handler.existCommand(command):
#if it's a petition to execute some command
try:
if len(args)>0:
handler.args=[args]
else:
handler.args=[]
if student_asks and command!='language':
if 'user_id' in request.args:
user_key=request.args['user_id'][0] + '@' + request.client.host
if type(args)!=type([]):
args=[args]
self.teacher.classroom.addCommand( user_key,command,args)
if command=='getAllNodes':
self.teacher.classroom.LoggedUsers[user_key].deferred_request=request
return server.NOT_DONE_YET
else:
return json.dumps({'result':'ack'})
#handler.args=['/opt/'+args]
if json.loads(recvjson).has_key('pclist'):
first=json.loads(recvjson)['pclist'][0]
if ',' in first:
handler.targets=first.split(',')
else:
handler.targets=json.loads(recvjson)['pclist']
if json.loads(recvjson).has_key('structure'):
structure=json.loads(recvjson)['structure']
handler.args=[structure['rows'],structure['cols'],structure['computers']]
result=handler.process(command)
#respjson= json.dumps({'result':'ack'})
if command not in ( 'getAllNodes' ,'getVideoNodes'):
respjson=json.dumps(result)
else:
respjson=result
except:
pass
else:
#it's sending the classroom data
try:
if command == 'datosaula':
if self.teacher.classroom.current_request==None or args=='refresh':
if self.teacher.classroom.current_request!=None: #close previously open request
try:
self.teacher.classroom.current_request.finish()
except:
pass #the connection is lost
self.teacher.classroom.oldJSON=''
self.teacher.classroom.current_request=request
self.teacher.classroom.getJSONFrontend(args)
else:
self.teacher.classroom.current_request=request
return server.NOT_DONE_YET
else:
# Analyse the request and construct a response.
respjson= self._HandleMessage(recvjson)
except:
# The data wasn't found in the headers.
pass
# Return the JSON response.
return respjson
def _HandleMessage(self, recvjson):
"""Handle a protocol message.
Parameters: recvjson (string) = The received JSON message.
Returns: (string) = The response JSON string.
"""
# Decode the message.
try:
pcs=json.loads(recvjson)['pcs']
#add data
pcs.append({'loginname':'este lo pone el backend','mouseEnabled':'False','internetEnabled':'False'})
#Construct the response:
return json.dumps({'classroom':{'pcs':pcs}})
except:
return None
def response_fail(self, messages=None):
messages = messages or []
return json.dumps({
'status': 'fail',
'errors': messages,
'time': int(time())
})
def response_ok(self, **kwds):
kwds.update({'status': 'ok', 'time': int(time())})
return json.dumps(kwds)
def _handle_chat(self, request):
request.content.read()
if request.path=='/student/':
if len(request.args)>0:
requestedfile=os.path.join(self.PageDir,'chat.html')
try:
page_to_send =open(requestedfile, "r").read()
html_to_send=page_to_send.replace('%(student_id)', request.args['login'][0])
return html_to_send
except:
request.setResponseCode(404)
return"""
<html><head><title>404 - No Such Resource</title></head>
<body><h1>No Such Resource</h1>
<p>File not found: %s - No such file.</p></body></html>
""" % requestedfile
else: #chatting
user_host=request.client.host
user = request.args.get('user', user_host)
key=user[0] + '@' + user_host
try:
if MyUtils.getLoginName() + '@127.0.0.1'!=key:
if self.teacher.classroom.LoggedUsers[key].chat_enabled==False:return self.response_ok()
except:
return self.response_ok()
message = request.args.get('message', None)
if not message:
return self.response_fail(['*message* not found', ])
message = cgi.escape(message[0])
response = self.response_ok(user= [ '('+strftime('%H:%M:%S') + ') '+ user[0]], message=message)
chat_logger = logging.getLogger('Chat')
chat_logger.info(user[0] + ": " + message )
for chann_request in self.channels['controlaula-chat']:
chann_request.write(response)
chann_request.finish()
del self.channels['controlaula-chat']
return self.response_ok()
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