Adding a lineitem to a gradebook results in unathorized (?handler=CreateLineItem)

The JWT Header response is empty and the JWT Payload works.

In toool.csthml.cs, IsSuccessStatusCode return false.

using (var response = await httpClient.PostAsync( LtiRequest.AssignmentGradeServices.LineItemsUrl, new StringContent(JsonConvert.SerializeObject(lineItem), Encoding.UTF8, Constants.MediaTypes.LineItem))) { if (!response.IsSuccessStatusCode) { Error = response.ReasonPhrase; return Page(); } }

Any advice ? Thanks

when I clicked add deep links, the pop up shows the error "id_token is missing or empty". may I know how to make it run?

We are working on the Score Service to return grades from our Tool to Canvas and have run into an issue when sending the token request for the client_credentials where we are getting a status 500 internal server error response from Canvas.

We have followed the steps using the OAuth2 Endpoints - Canvas LMS REST API Documentation.

We are generating a token request via a POST /login/oauth2/token with a grant_type of client_credentials and a properly formed JWT signed with our private key. The Scope is https://purl.imsglobal.org/spec/lti-ags/scope/score
Here is a sample Score json.
{
"activityProgress": "Completed",
"gradingProgress": "FullyGraded",
"scoreGiven": 32.0,
"scoreMaximum": 100.0,
"timestamp": "/Date(1572302484610)/",
"userId": "bf14f352-16f3-498d-8f65-780b80b8c581"
}

We are able to successfully get the tokens from Blackboard and Moodle with this same workflow.

Does anyone have any suggestions on troubleshooting this?

"lineitem": "https://sandbox.moodledemo.net/mod/lti/services.php/2/lineitems/2/lineitem?type_id=1"
this is from moodle, it adds query param to the uri causing service calls to fail...

When the tool appends "/results" to the LineItemUri it would become "https://sandbox.moodledemo.net/mod/lti/services.php/2/lineitems/2/lineitem?type_id=1/results" which is invalid instead of "https://sandbox.moodledemo.net/mod/lti/services.php/2/lineitems/2/lineitem/results?type_id=1"

just fyi, wasted a bit of time on this...

I get the message above when I try to register the LtiAdvantagePlatform (so iss=https://advantagetool.azurewebsites.net) and when I try to register the IMS Test tool (iss=https://lti-ri.imsglobal.org), but I don't have any Platforms registered with either of these names

According to the spec and the reference implementation, the parameter on the DeepLinkingResponse (https://github.com/andyfmiller/LtiAdvantageTool/blob/master/src/Pages/Catalog.cshtml.cs#L150 ) is "JWT", not "id_token". And at least as far as the reference implementation is concerned, casing does matter here.

This repo has two missing project references i.e

<ProjectReference Include="..\..\..\LTI\LtiAdvantage\src\LtiAdvantage.IdentityModel\LtiAdvantage.IdentityModel.csproj" />
   <ProjectReference Include="..\..\..\LTI\LtiAdvantage\src\LtiAdvantage\LtiAdvantage.csproj" />

Please add missing projects and references so that we can move further for a sample idea of LTI Advantage Library.

According to IMS LTI 1.3 Specification claim "https://purl.imsglobal.org/spec/lti/claim/tool_platform" is not a mandatory claim.

However the Tool crashes and throws an error on not passing the same.