Hi Juan,

thank you very much for this great plugin! It is total easy to use and it works .

I found a small issue. In line 154 in the tool.php you do a db-query to "local_ltiprovider_user" and also a comparison with the sourceid. But the sourceid is different on each call.
So each time a new entry is created in the table "local_ltiprovider_user". If a student is calling this tool three times or more an error occurs.

Error: mdb->get_record() found more than one record!

• line 1302 of /lib/dml/moodle_database.php: call to debugging()
• line 1262 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
• line 1242 of /lib/dml/moodle_database.php: call to moodle_database->get_record_select()
• line 154 of /local/ltiprovider/tool.php: call to moodle_database->get_record()

You can see this error if you enable debugging at the provider-side where your plugin is installed.

Best regards an a happy new year!
Andreas

Juan,  This is really cool - I downloaded it and got it working in Moodle 2.2 on the IMS servers.  

It took me a while to debug a blank screen that was caused by   X-Frame-Options being set to sameorigin if I wanted to embed it in a frame.   I had to change Site administration / ▶ Security / ▶ HTTP security -> Allow frame embeddingallowframembedding to "yes" to get it to work in a frame.

You might want to change lthe redirect() call to first check $CFG->allowframembedding and if frame embedding is disallowed do not do the redirect and instead, generate HTML with and without Javascript to make a popup window.

This way folks would not have to enable something they consider insecure.

Juan, The option to hide left and right blocks (a wonderful feature by the way) does indeed hide the blocks on my version, but it still leaves the space on the left and right, kind of defeating part of the purpose of removing these.

Did I already say how awesome this is  Thanks.

Very very cool

Just added a review of the plugin.

http://www.somerandomthoughts.com/blog/2012/01/08/review-lti-provider-for-moodle-2-2/

I am using this module in a small pilot in a class with 60 students I am teaching at the University of Michigan.  

Hello first of all thanks!!

I found one problem. I f you have in the same Moodle BasicLTI Provider and BasicLTI Consumer you get errors because there are some repeated classes and function. I changed 3 files and then everything works.

The files are:

1. ims-blti/blti.php
2. ims-blti/blti_util.php
3. ims-blti/OAuth.php

Then when I try to register a tool I have the same problems in mod/basiclti.

The best solution is to change all the functions in this 3 files prefixing with ltiprovider_ or something like that?

What do you think?

Hi All,

I used two moodle instances where one works as the consumer and the other as the provider. Everything works fine except when it comes to transfering the grades back to the consumer.

Then I insatlled MoodleCron-Setup.exe (http://download.moodle.org/download.php/windows/MoodleCron-Setup.exe) but it still doesn´t work

Can anyone pls tell me what is the problem?

Thank you

Hey juan.

1. i cant tell you how glad i am to see this plugin come out. many many thanks.

2. i have translated this plugin to hebrew, how do i contribute it ?

3. can you specify exactly what happens when i use this tool to share activities on the SAME moodle site ?

from what iv'e seen, after the user clickes on the link and transfered, he adopts his new identity, and is revoked of all his rights in this site.

even thow he still is an active student in the site.

if he wants to continue working on the site, he has to log out and log in again. (or am i doing something wrong ?).

Omer

Hi Juan,

Thank you for this great plugin. I'm sharing a forum across Moodle 2.2 sites, everything works fine except that I can't on the consumer side get rid of the theme header for the site providing the forum. I have checked the option to hide both the header and footer on the provider side but somehow only det footer is hidden.

Any hint about what I could do to get the header hidden?

Regards
Alex Contis 

I just uploaded a new version:

http://moodle.org/plugins/pluginversion.php?id=466

- New settings for:
-- Enrolment duration
-- Enrolment start and end dates
-- Enrolments quota

- Support for Moodle 2.2 allowframembedding option

Dont't forget to go to Admin -> Notifications after upgrading the code, there are changes in the plugin's tables

Hello, Juan.

Thank you very much for your plugin, it works pretty.

We have the following question.

We want to pass from client LMS information about user group.

As far as we can see from this link
http://www.imsglobal.org/lti/blti/bltiv1p0/ltiBLTIimgv1p0.html#_Toc261271975
we can pass it from client (Moodle 2.2 or some other LMS) as a custom key/value parameter.
Have you any plans to implement functionality by processing of some custom parameters?

For example, you can check "groupname" key in POST variables and if this parameter exists, create corresponding group (if necessary) in course and assign user to it.

Thanks.

Hi Juan,

I am working in LMS system which is build in custom PHP.I have to fetch Course details,studedent details,subject details from a Moodle instances. Is Moodle LTI provider work there for this requirement?.Please help me.

Thanks...

Juan,

First of all, thank you for investing the time and effort on this contribution - it works great!

I do have a question about activity reporting, however. I have a Sakai instance running that is an LTI consumer of some courses I have running on Moode serving as the LTI provider.

I thought it would be interesting to create a report (using your Configurable Reports block), showing external tool user logins to the Moodle platform. The report shows the First Name, Last Name, Email Address, and Logins to the System.

Output from the report lists the users coming in from Sakai alright, but it shows a zero for the number of logins. I presume it has to do with the fact that the users coming in from Sakai are set up in Moodle as a nologin account - correct?

Is there a way around this as it would be nice to be able to report on external users and their activities.

Cheers!

David Richter

I could use some help please,

The setup all goes ok, I make a tool, when I refere to the tool from another system (Canvas) I get this error in the frame:

This webpage has a redirect loop

Can I say this is a very useful and innovative plugin, well done!

What i've noticed when accessing content from other moodle, it will create a new user (i.e: username: ltiproviderd5f635d3f81b0bee62f5296ce3839ad1).

And I can't seem to delete that user from LTI Provider's moodle: "Invalid User" error was produced.

Is this supposed to be the case? any help would be appreciated.

Thanks.

Eric

Juan:

Fabulously easy installation. Love it!

A question

Because the plugin sets up a No Login authentication it makes it hard to look after someone in an emergency when SSO is not functioning (say consumer portal is down for example). Do you have any ideas about how an admin could provide manual authentication and enrollment but then later revert back to SSO? 

This is my first shot, and indeed my institution's first experience at LTI modules, so this may be a predictable problem, but I'm getting errors as below:

Notice: Undefined index: user_id in /home2/l557375/public_html/moodle/local/ltiprovider/ims-blti/blti.php on line 195

Notice: Undefined index: roles in /home2/l557375/public_html/moodle/local/ltiprovider/tool.php on line 116

Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent in /home2/l557375/public_html/moodle/lib/moodlelib.php on line 4131

The launch URL is http://legalwriting.ie/moodle/local/ltiprovider/tool.php?id=1. I'm running Moodle 2.3.1, and downloaded LTI provider from Github in the past week.

On clicking continue, you can create a user but this cannot be either confirmed or deleted by me as an administrator.

Is this fully supported in Moodle 2.3? I know it mentions 2.2+ onwards but I wondered just how many people were running it in 2.3 and what sorts of issues they were having.

I mean, is it functional enough in 2.3 to rely on?

What a brilliant development! It seems to work well between two installations of Moodle 2.3.

However I have noticed that if I am Admin or Manager in Moodle A and follow the LTI link I have editing rights (Teacher role?) in the course in Moodle B  where the LTI provider is set.

I have set the LTI course role for instructor & student to both be student.

Does this tool also need an option e.g. match any other role = student/teacher/manager etc to prevent this potential problem?

Great work and potentially very useful.

Thanks again,

Jim

An old issue I have been experiencing with LTI. Both consumer and producer are Moodles, when I use external tools from producer to moodle consumer, the consumer gets kicked after the producer cron job runs. On the consumer Moodle we get a login screen.

We can open the cron to run less frequently, but when the consumer is also using the producers communications tools it bounds on the ridiculous to increase cron time.

What am I doing wrong or forgotten to tweek?

I have been working with the LTI provider quite extensively over the past few days. I have hit some roadblocks that I could really use some help with.

I have two moodle installs, each on their own server

The LTI Producer is on Moodle 2.4

The LTI Consumer is on Moodle 2.3

I have made two quizzes on the Producer and made them Tools

I created two external Tools on the Consumer linked to the quizzes on the Producer

Both appear to work great. I can take both quizzes on the consumer, I can confirm that they have been taken on the Producer

Here is the first problem: When User A takes Quiz 1 in the consumer, a new user for User A is created on the Producer (that is what I would expect to happen). When User A takes Quiz 2 in the Consumer, a SECOND new user for User A is created on the Producer. I have done this with three tools now and have THREE user accounts for User A on the Producer.

In the grade book, there are three User As and grades for each user are blank except for the column of the assignment that created that user.

Is this how it is supposed to work? Is there a setting I'm missing?

This problem is compounding because the producer grades are not being reported to the consumer gradebook. When I run cron, these are the results:

Processing customized cron scripts ...Processing cron function for local_ltiprovider...
Running cron for ltiprovider
 Sync tool id 2 course id 5
User grade not send: grade = 
User grade send failed: 
 Sync tool id 3 course id 5
Skipping user 13
Skipping user 14
done. (20 dbqueries, 0.63 seconds)
done.

Any help would be appreciated. Perhaps I am being too ambitious, but I was hoping to use this tool next week.

Here is the info for my tools

Quiz: LTI Quiz Test	d42dd4989cad6d7d1a843bb5e80df557	http://livegreat.us/moodle/local/ltiprovider/tool.php?id=2
Quiz: LTI Quiz Test2	ff061af4318fb8f16946fa57dcc3c644	http://livegreat.us/moodle/local/ltiprovider/tool.php?id=3

Juan,

I ran into a rather scary problem today. I set up a course in Moodle (2.4) as LTI Provider and invited different Moodle admins to connect to it from their Moodle sites. One person connected under a wrong identity (excuse my English).

Let's call them Alice and Beth. They both have a Moodle site (version 2.2) with admin role hosted on the same server. Alice roamed to my Moodle course through external tool activity (LTI) at 16:08 and didn't logout according to Moodle's log. Later Beth tried to access the same way, but got authentified under Alice's name. Wrong identity! In the log, I see a second login (16:37) under Alice's name. No Beth user created.

Both users come from different IP addresses. How can one connect under someone else's identity?

Of course, they both connect with the same secret key.

Any idea?

Hi , 

Simply great work..! It works fine for me. 

My need is to access stuff in the provider, say a course, from consumer even when there is no internet connection. We can backup a course from the provider and restore it in the consuer. But this has to be done automatically. 

Is there a way to accomplish this task? 

Your help is highly appreciated. 

Thank you in advance..! 

Is there a version recommended for Moodle 2.4.1 ?

I tried the version listed in plugins but got errors on install about versions.

Should I use the Git version instead?

Any issue with Internet Explorer 9 runninf on win 7?

 I have a Moodle linked to another with LTI. It works fine with FF and Chrome but doesn't automatically login with IE.

Juan,

I have been using the LTI Provider tool and appreciate this contribution.

I've noticed that, when sharing at the course level and accessing several courses as a student, multiple accounts are created (one per course).

I was wondering if there is a way to group these under the same account. I do realize that conceptually, this system is keeping the different shared resources distinct from one another, but having one user would make certain information more meaningful.

Thanks!

Hi all,

User grade send failed in the following lti provider installation:

ltiprovider version from git: 2011121706

moodle version: version  = 2012120303.03;  release  = 2.4.3+ (Build: 20130328)

Tested on a hosted moodle and local install. Same ltiprovider version worked with the following moodle version:

version  = 2012120300.00;   release  = 2.4 (Build: 20121203);

The lti consumer is moodle 2.2 installation for testing with lti provider 2.4 (success) and 2.43 (failed). Did something got broken in 2.4.3+?

The problem appears to be grademax being declared as undefined property in 2.4.3+.

TIA for any help.

Roel

If anyone is experiencing problem with the users to be automatically un-logged, sessions problems etc... you can apply this patch:

https://github.com/jleyva/moodle-local_ltiprovider/pull/14/files

It replaces the "nologin" auth method for a standar "manual" one

I'm not going to integrate this feature because it's not backward compatible

We are trying to get some funding (crowdfunding) for make improvements to the plugin, until this happens I can't expend so much time

Sorry

Juan & community:

Thanks for the revolutionary plugin!

My issue: The Provider stores quiz grades that I cannot manage to push to the Consumer (Moodle 2.5+ build: 20130627). 

Some stats: I'm using lti_provider 2.3 (version = 2011121707) in my course Provider Moodle (Moodle 2.4.4+ build: 20130627). I've got web services activated and cron running on both Moodles.

Am I having these grade woes because I am not using a Consumer Key? I am not sure WHETHER I should be offering a Consumer Key from my Provider, and if so, I am not sure HOW to do this (which I mention because of the docs that say "The 'tool provider'... will issue you with this key. If you are merely linking to a tool with no secure access or gradebook sharing then you won't need a consumer key.")

I do want to push grades back to the Consumer. H-h-h-how???

(By the way, I have put some random numbers in the Consumer Key field of the "External Tool" activity module on my Consumer Moodle. But that's just because when I leave it blank, I get the notice on an otherwise white screen: "Missing oauth_consumer_key in request". Not sure why that's necessarily an error. But I mention it on the chance that it matters.)

Thanks very much for your help. Very much,

~Brendan

Hi Juan Leyva,

Thank you for developing this plugin. I am new to Moodle and php, and I was experiencing the problem where the grades are not sent back to consumer.

Here is something that I found when looking into the problem. Below is the cron output produced on provider side:

Processing customized cron scripts ...Processing cron function for local_ltiprovider...
... started 18:46:18. Current memory use 46MB.
Running cron for ltiprovider
DEBUGGING: Tools are located as local_ltiprovider. Sendgrades enabled.
Starting sync tool id 1 course id 2
DEBUGGING: Users are found as local_ltiprovider_user.
DEBUGGING: Tell me who the user is 1
DEBUGGING: Tell me what the source-id is {"data":{"instanceid":"3","userid":"27","launchid":167942083},"hash":"50ac51638a9c6ece834199a8520a88a9f73c1a33d8bd567824cd7c4b077daaa3"}
DEBUGGING: Tell me what the service-url is http://www.nectarlearn.com/lmsbackup/mod/lti/service.php
DEBUGGING: Tell me what the cusumer-key is c70d26795dfd91d3866ebc278b0a5e1b
DEBUGGING: Tell me what the consumer-secret is c70d26795dfd91d3866ebc278b0a5e1b
DEBUGGING: The grade (COURSE) of user 1 is 100.00000.
DEBUGGING IN OAuthBody: context is Resource id #849
DEBUGGING IN OAuthBody: endpoint http://www.nectarlearn.com/lmsbackup/mod/lti/service.php
IN SE User grade send failed: RVICE!!!!!!!!

 Looks like the user information and grade are found and collected on the provider side. When it hits the line in lib.php:

Where it is directed to OAuthBody.php:

The $endpoint here is /mod/lti/service.php on the consumer side. From the cron log, it seems this file was not thoroughly executed. My message "IN SERVICE!!!" (in service.php on the consumer side) was cut into two pieces by the failing message:

IN SE User grade send failed: RVICE!!!!!!!! 

I think this means on the provider side, the process has already proceeded to the next stage before $reponse is filled with any  actual content. Could this be the web service issue?

I might be going in a wrong direction. Please correct me if that is the case.

Thanks,

Francis

Hi Juan,

thanks for all this work !

i'm making local follow ups to solve the following requirements : 

• Handle automated groups/groupement generation based on LTI customer identification to ensure insulation of users from several customer entities
• Add a complete web service layer to create/update/delete LTI courses or activities "on demand"

 i will try to reintegrate all your upgoing changes to keep implementation as compatible as possible....

Cheers

Valery 

Hi Juan,

I'm having a little trouble with your plugin. I'm trying to use it to provide SCORM packages to Canvas. When I try add the external tool in Canvas, it displays the error message, "Invalid xml syntax." Has anyone else every had this problem? If so, how do you get around it?

Thanks,
Martin Williams

Hey all, I'm really hoping someone can help me out. I'm having a problem with using the LTI system to get courses available from one Moodle course to another.

Currently, I have it all installed and at face value it all works. The problem comes when a student clicks on an external tool link to access the remote course, and it will load up the page but then just hang. It simply displays a blank screen (with the main site's banner), but the frame is empty. Eventually, it will load up a page from the remote site at the login page, with the words "Session has timed out" displayed

Back at the remote site, it does actually log me out of any account I'm currently using. Also, the logs show that a user is logging in (via "web") but it doesn't mention that they log out. So I know that authentication is working, because of that log, and also new members are made when remotely using a different user.

Pretty much the only setting I've changed is so that the default auth method is "Manual"

I'm not sure if people can try it out, but the URL is: http://www.tabornsw.edu.au/moodle/local/ltiprovider/tool.php?id=2

The secret key thing is: 50138d54acb4706e12275c134ad104ba

Can anyone help? Moodle is saying they are logging in, but then it just hangs and the session times out?! I've spent hours on this trying to fix it

When User A takes Quiz 1 in the consumer, a new user for User A is created on the Producer (that is what I would expect to happen). When User A takes Quiz 2 in the Consumer, a SECOND new user for User A is created on the Producer. I have done this with three tools now and have THREE user accounts for User A on the Producer. In the grade book, there are three User As . Is that what is supposed to happen?

Also, does grade pass back work with Workshop? Workshop creates two columns in the gradebook for one assignment.

Hello,

I just want to write to say that this plugin has been extremely valuable to our organization.  Thank you very much for your contribution. 

Is there a planned release that is compatible with Moodle 2.7?

Thanks

I have set up a class in another LMS (not Moodle) with a link to a Moodle site running version 2.7. 

When a user goes into from the LMS into a Moodle forum they can make a new post without any problem.  However, if a user wants to reply, they are able to compose it, but when they try to post, a message pops up that says that a guest cannot post and they are presented with a regular Moodle log in screen.

I was able to duplicate this on my own, even though I am the course teacher.  Then I went directly to the Moodle site and logged in.  I then logged out of Moodle and then accessed Moodle again from the external link in the other LMS.  This time I was able to post to the forum without any problems.

Any ideas about why this happened?  Should I simply say to the student to try again?

Confused.

CAB

Hi,

I am a first Level Support admin for a University Moodle platform which has very limited plugins, thus restricting the functionality of the System. Unfortunately I am not able to alter any of the Network Settings, however, I have my own Moodle platform which is bristling with plugins, and so the idea to utilise the LTI plugin came to mind. Unfortunately it didn't work and so thus I posted a question which Mary very kindly answered and suggested the LTI Provider plugin.

Sadly this doesn't seem to work either. Each time I try to make the link it asks me to Login to the host Moodle which I was hoping to avoid.

Can anyone suggest any thoughts on where I may be going wrong please.

Page 1.

Page 2

We are trying to use this to allow users in a set of courses (let's call them A1, A2, A3, etc.) to access some common resources in a separate course (let's call it B) on the same Moodle server. The links I have set up allow the user to go from course A1, A2, etc. to course B, but then the user is logged out of their account that has permissions in course A1, because now they are the pseudo-user in course B. The new user account displays the same name in the header, so it took me a while to realize that this is what's going on.

Is there a way to re-use the same user account in the Provider course through LTI? Or do we have to host the resources on a separate Moodle instance? We would rather be able to keep all the user actions under the same user.

Juan, I hope you know I love you, because what I am about to say will seem unkind.

The LTI Provider is a terrible mess. I can say this after using it in a live course this semester. At first it seems OK, but in practical experience, it is just awful. (sorry for the harsh words) I have added 7 LTI Workshops and imported them individually into Canvas. Each student gets a new user in Moodle for EACH assignment. That makes for 800+ users! There is a bug with the manual enrolments so that the time zone is a mess and students cannot turn in assignments within six hours of the due time. Grade passback only works for about 10% of the users. If it failed 100% I would think it was a chron issue, but only a few scores make it back. Work shop has two columns but grade passback only sends one score. With 7 rows for each user there is no way to know which score goes with which row, so if I need to enter a score by hand, there is no way to know which one it is.

So, I don't mean to sound unkind. But I thought the community should be aware of my experience. I would love if someone would just explain to me that this is user error and that just do it different.

Hi,

That's a brilliant plugin and we are testing its features between two Moodle installations ( 2.8.5).

However it seems when candidates scores 0, getting all questions wrong, the grade/score is not sent back by the LTI provider.

It seems the pluging send only grades greater than zero

 in ltiprovider/lib.php (line 267 in our version):

if ($grade > 0 and $grade <= $grademax) {
                                $float_grade = $grade / $grademax;
                                $body = local_ltiprovider_create_service_body($user->sourceid, $float_grade);

We have candidates that get all questions wrong and therefore score zero; which is a valid grade.

Am I correct in my assumption?

Will it be addressed?

Thanks again,

Sam

Hi Juan,

Is your LTI Provider plugin compatible with Moodle 2.9?

I just updated the plugin to work with Moodle 2.9 (it includes several additional bug fixes)

https://moodle.org/plugins/pluginversion.php?id=9345

Hi,

I just uploaded a new version of the plugin compatible with Moodle 3.0

https://moodle.org/plugins/pluginversion.php?id=10423

Juan

Dear Juan,

Thanks for creating this great plugin.  A question: Is it possible to configure the plugin (via Moodle settings) so that when a student whose enrollment has expired tries to access the course via the external link, he cannot actually get into the course?  We have a need for this type of feature, but I can't seem to find the right settings combination for it.  We are using the "enrollment duration" setting to give students 60 days of access when they first click on the external link.  However, on day 61, they can still access the course, even though their enrollment has expired.

Thanks so much,
Justina Torres

I am testing the great LTI on two Moodle 2.4 servers. Both consumer and producer are Moodles,

In the consumer Moodle I stuck with the login screen of the producer Moodle. I can see that the new account is made in the course, but still the loginscreen appears, sso does not work. I am using the standard settings. 

Any idea?

Hi Jaun,

Can you please explain me how to register and use this LTI provider tool with with global secret Key.

Thanks

Sagar

Hi!

I've been given the task to write an LTI consumer in Python+JavaScript that connects to Moodle. I have installed your plugin on our Moodle test server and it works beautifully.

Our home system needs to be able to get the ANSWERS of the students back to our own system. Is this possible using your plugin? I'm not 100% certain about the details of LTI and what version I might need - or if I need custom parameters for this. I have asked and unfortunately getting just the grades back is not enough for our uses, since we want to be able to look at the process the student went through to get to the right answer. I know one can go into Moodle and look at the answer attempts, but we need to integrate the answers into our own system too without Moodle showing up.

If your plugin supports this behavior, I will jump up and down in joy since many problems have been solved that would have involved hacking with JavaScript and IFRAMEs. Otherwise I will need to look further.

-- Pekka, from http://www.jyu.fi

Hello Juan,

I am using Moodle 3.0.3 version. I have installed this plugin, as per the context here "https://docs.moodle.org/30/en/LTI_Provider", i have followed the instructions. A new link called "LTI Provider" is shown in the course navigation block. But when I clicked on it, it is showing 500 internal error page.

Please help me on moving forward.

Thanks
Sricharan

Is there a migration path from this plugin to the "Publish as LTI tool" framework described at https://docs.moodle.org/en/Publish_as_LTI_tool