Working on developing 1.3 LTI Deep Linking. Keep getting errors.

Steven.Davies25

------------------------------------ UPDATE I found out what was originally going wrong, I wasn't sending the KID header along with the token. However I'm still having a problem... Now I get "The external learning tool responded with no content. Close this dialog and try again or contact the external learning tool for support." Am I sending the content item incorrectly? ----------------------------- Hello, I'm trying to achieve deep linking between my tool and Brightspace. The initial request comes in fine, I get the deep_link_return_url from it, select the link i want to use, then attempt to post the data back. This is where i'm having the problem. To start with I got 500 error, did some research and realised I had to put the kid in the header. Once I started sending that I am now getting 403 Not Authorised errors. System logs in brightspace state "Error processing deep linking return" Can anyone see any problems with the below, or is there anyway of getting a more detailed error? Here is the token I am sending (I seralise before I do send): {  {   "alg":"RS256",   "kid":"private-kid",   "typ":"JWT"  }"."{   "iss":"https://pebble.d2l-partners.brightspace.com",   "aud":"privateaud",   "exp":1645720195,   "iat":1645719595,   "nonce":"618e64fe03376e1f482470cea7e7dff7d54606d1336db09cddcf3b2697af87cd",   "https://purl.imsglobal.org/spec/lti/claim/message_type":"LtiDeepLinkingResponse",   "https://purl.imsglobal.org/spec/lti/claim/version":"1.3.0",   "https://purl.imsglobal.org/spec/lti/claim/deployment_id":"privatedeploymentid",   "https://purl.imsglobal.org/spec/lti-dl/claim/data":"3xf3EE1aJaOuAdhyBiaYoWNqRR22OcDRQrDZgc1ipWQ~",   "https://purl.imsglobal.org/spec/lti-dl/claim/content_item":"[{\"type\":\"ltiResourceLink\",\"title\":\"Testing Template\",\"text\":\"\",\"url\":\"https://testurl.com\"}]",   "nbf":1645719595  }} 

Steven.Davies25

worked it out

 

"https://purl.imsglobal.org/spec/lti-dl/claim/content_item" should have been "https://purl.imsglobal.org/spec/lti-dl/claim/content_items". Missing an s

 

also it wasn't expecting a array of objects, just expecting one ltiResourceLink