Las2Peer - rwth-acis/Anatomy2.0 GitHub Wiki

21.5.2015

cloned github.com/rwth-acis/LAS2peer-Template-Project added to git and commited imported with IntelliJ Marked test/ as "Test sources" Added lib/ as Project-library One time ant-task all, then compile-main (skips junit-compile/test, user-agent-generation, javadoc-generation) --> Exception in executed method! InvocationTargetException (i5/las2peer/services/servicePackage/ServiceClass : Unsupported major.minor version 52.0) Wrong javaversion! Using extended_bash

26.5.2015

Configuration on eiche: config.php: add $las2peerUrl = "http://eiche.informatik.rwth-aachen.de/3dnrt:8080"; via ssh:

export PATH="$PATH:/opt/java-8/bin"
cd ~/web/Anatomy2.0/applications/LAS2peer-Template-Project
./bin/start_network.sh

Getting public IP with ifconfig.

Error: Could not find or load main class i5.las2peer.tools.L2pNodeLauncher: copied folders lib and service, generated from ant, to server. Ant is not installed, should be done with Jenkins.

i5.las2peer.p2p.NodeException: Unable to open Netwock socket - is the port already in use? Checking with netst -tlunp: Port 8080 was in use. ps aux | grep java revealed that two las2peer-services are already running. So changed port from 8080 to 8081 in {las2peer}/etc/properties and /src/config/config.php and from 9011 to 9012 in {las2peer}/bin/start_network.sh. Now it says OpenID Connect Provider https://api.learning-layers.eu/o/oauth2 unreachable!. Want to try ant build. Have to ask for someone who knows how to do it.

For colouring see LAS2peer/src/main/java/i5/las2peer/tools/ColoredOutput.java

27.5.2015

Checked whether it could be related to the strong encryption problem but no, when the policy-files are missing, the error says i5.las2peer.persistency.EncodingFailedException: crypto problems....

I asked Petru he said the oidc-provider can not be reached from the eiche nor from the buche-server. The service has to be deployed in the cloud, tomorrow I will get credentials.

So for now I try to open a port on my laptop. Test for connectivity:

<?php
	var_dump(extension_loaded('curl'));
    $url = "http://134.61.36.234:8081/3dnrt";
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	$res_exec = curl_exec($curl);

    if($res_exec == FALSE) {
        echo curl_error($curl);
    } else {
        echo curl_getinfo($curl, CURLINFO_HTTP_CODE).'.' '.$res_exec;
    }
    curl_close($curl);

Saved in portTest.php. curl is not installed, so sent request for installation to Reinhardt, with url http://askubuntu.com/questions/9293/how-do-i-install-curl-in-php5.

28.5.2015

Worked!

The login now works this way:

  • Login via OIDC-button, other ways do not matter
  • Redirect to registered page with url param #access_token=23dssg-seg... (no new request to the server)
  • ajax.post("../php/checkUserKnown.php", {access_token:token}, ...) in the oidc-javascript-callback-function (welcome.js)
  • In checkUserKnown.php on serverside: 
    // use las2peer-service for oidc-provider-communication and user-retrieval
httpRequest("GET", $las2peerUrl.'/'.'user'.'?access_token='.$access_token);

    // cache access_token in session      
session_start();
$_SESSION['access_token'] = $access_token;
    Create user in database if not exists.

Then, every a restricted service is requested, check access_token with:

  • Call checkUserKnown.php (using $_SESSION['access_token] instead of url-parameter)
  • Check for HTTP-status-code 200
  • Optionally query database openIdConnectSub and check for confirmed

Meeting with Yogi. Eiche-cloud (oidc-provider) connection does not work (bug), complete server on cloud neither. We decided to provide a fake login and replace it with the las2peer-based login later on.

The login workflow will then work like this:

context fake later
oidc-callback, ajax.post("../php/checkUserKnown.php," (welcome.js → signin_callbacks.js) access_token,sub,email, given_name,family_name access_token
setup session (checkUserKnown.php) access_token,sub access_token
get userprofile (checkUserKnown.php) - las2peer-request
create user databaseentry if not exists (checkUserKnown.php) sub,email, given_name,family_name sub,email, given_name,family_name

Register workflow:

context fake later
javascript-button (login.php), ajax.post("../php/register.php",...) $_SESSION['email'] $_SESSION['acess_token'], las2peer-request
send email (register.php→register_as_tutor.php) - -

Login/Tutor-restricted services:

  • upload model
  • add course
  • edit course (+ only creator)

They all include 'login.php';. login.php sets variable $isTutor and renders a message and button if $isTutor is set to FALSE. "edit course" additionally require 'tools.php' with function getCourseCreator($courseId) and renders an individual message if $isTutor is TRUE and the user is not the creator. Flow:

context fake later
cookie set?, (login.php) $_SESSION['access_token'] $_SESSION['access_token']
values valid?, (login.php) - (use $_SESSION[...]) $_SESSION['acess_token'], las2peer-request
setting $isTutor (login.php) databasequery $_SESSION['sub'] databasequery $user->sub
(edit course) check whether user created course (getCourseCreator(), tools.php) databasequery $_SESSION['sub'] databasequery $user->sub

Today's debugging consisted mainly of not seeing the error of a not running database.

2.6.2015

addcourse/editcourse flow:

context fake later
User authorization (login.php) see table above see table above
<form action= "../php/upload_script_course.php..."

9.6.2015

Forgotten element "lecturer mode":

Button "enable lecturermode", toolbar.php fake

ob_start();
include '../views/login.php';
ob_end_clean(); 
if ($isTutor && (isset($_GET["widget"]) && $_GET["widget"] == "true"))
	// insert button

later

if (isTutor() && (isset($_GET["widget"]) && $_GET["widget"] == "true"))
	// insert button