uoc / java-lti-1.3 Goto Github PK

Hi @xaviaracil,

Do you have any plans to support the IMS Global LTI standard for Proctoring Services? If so, any idea when?

http://www.imsglobal.org/proctoring-services

Currently online proctoring solutions are integrated through a custom integration. Supporting this standard would enable any Exam tool with LTI 1.3 Proctoring Services support to integrate with a supporting LMS or "Platform" (e.g. like Blackboard, Moodle).

Specification: http://www.imsglobal.org/spec/proctoring/v1p0

For better understanding perhaps you find the following links useful:

• IMS/Examity video ("Learning Impact On-Demand: Proctoring", Jan 2021): https://www.youtube.com/watch?v=jEmZPtBkWIU
• TOA Implementation (PHP): https://github.com/oat-sa/extension-lti-proctoring

As an Exam tool provider we'd be highly interested in seeing more uptake enabling us to move away from one-off custom integrations hence my Feature Request even though we ourselves are .Net based.

Kind regards,
Jeroen Habets

We are currently testing LTI and wanted to try your library, the readme suggests we can just import it, but we cannot find it in any maven repositories. Could you point us in the right direction?

Test errors seem to prevent successful build. No changes to package after downloading and opening it into IntelliJ using JDK 11 & 17.

Here's the log

douglundin$ mvn clean install
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for edu.uoc.elc.lti:lti-13:jar:1.0.0
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 76, column 15
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] -----------------------< edu.uoc.elc.lti:lti-13 >-----------------------
[INFO] Building edu.uoc.elc.lti:lti-13 1.0.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ lti-13 ---
[INFO] Deleting /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ lti-13 ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ lti-13 ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 49 source files to /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/target/classes
[WARNING] /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/main/java/edu/uoc/elc/lti/tool/validator/LTICoreValidator.java: Some input files use unchecked or unsafe operations.
[WARNING] /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/main/java/edu/uoc/elc/lti/tool/validator/LTICoreValidator.java: Recompile with -Xlint:unchecked for details.
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ lti-13 ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 35 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ lti-13 ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 15 source files to /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/target/test-classes
[WARNING] /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/test/java/edu/uoc/lti/jwt/claims/TestLaunchLoader.java: /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/test/java/edu/uoc/lti/jwt/claims/TestLaunchLoader.java uses unchecked or unsafe operations.
[WARNING] /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/src/test/java/edu/uoc/lti/jwt/claims/TestLaunchLoader.java: Recompile with -Xlint:unchecked for details.
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ lti-13 ---
[INFO] Surefire report directory: /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/target/surefire-reports

T E S T S
Running edu.uoc.elc.lti.platform.ags.ScoreTest
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.073 sec
Running edu.uoc.elc.lti.platform.accesstoken.AccessTokenRequestHandlerTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.804 sec
Running edu.uoc.elc.lti.platform.deeplinking.FileItemValidatorTest
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.278 sec <<< FAILURE!
isValidEmpty(edu.uoc.elc.lti.platform.deeplinking.FileItemValidatorTest) Time elapsed: 0.002 sec <<< ERROR!
java.lang.NullPointerException
at edu.uoc.elc.lti.platform.deeplinking.FileItemValidator.mediaTypeIsValid(FileItemValidator.java:36)
at edu.uoc.elc.lti.platform.deeplinking.FileItemValidator.fileItemIsValid(FileItemValidator.java:27)
at edu.uoc.elc.lti.platform.deeplinking.FileItemValidator.isValid(FileItemValidator.java:22)
at edu.uoc.elc.lti.platform.deeplinking.FileItemValidatorTest.isValidEmpty(FileItemValidatorTest.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)

Running edu.uoc.elc.lti.platform.deeplinking.LtiResourceItemValidatorTest
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec
Running edu.uoc.elc.lti.platform.deeplinking.content.ItemTest
Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.034 sec
Running edu.uoc.elc.lti.platform.deeplinking.content.LinkItemTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec
Running edu.uoc.elc.lti.platform.deeplinking.content.LtiResourceItemTest
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.002 sec
Running edu.uoc.elc.lti.platform.deeplinking.LinkItemValidatorTest
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.002 sec
Running edu.uoc.elc.lti.platform.deeplinking.ItemValidatorTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.024 sec
Running edu.uoc.elc.lti.platform.deeplinking.DeepLinkingClientTest
Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.02 sec
Running edu.uoc.elc.lti.tool.ToolTest
com.auth0.jwk.SigningKeyNotFoundException: No key found in https://lti-ri.imsglobal.org/platforms/2647/platform_keys/2449.json with kid imstester_66067
at com.auth0.jwk.UrlJwkProvider.get(UrlJwkProvider.java:174)
at edu.uoc.lti.jwt.LtiSigningKeyResolver.resolveSigningKey(LtiSigningKeyResolver.java:34)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:376)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:550)
at io.jsonwebtoken.impl.DefaultJwtParser.parseClaimsJws(DefaultJwtParser.java:610)
at io.jsonwebtoken.impl.ImmutableJwtParser.parseClaimsJws(ImmutableJwtParser.java:173)
at edu.uoc.lti.jwt.claims.JWSClaimAccessor.decode(JWSClaimAccessor.java:43)
at edu.uoc.elc.lti.tool.AuthenticationResponseValidator.validate(AuthenticationResponseValidator.java:35)
at edu.uoc.elc.lti.tool.LaunchValidator.validate(LaunchValidator.java:33)
at edu.uoc.elc.lti.tool.Tool.validate(Tool.java:68)
at edu.uoc.elc.lti.tool.ToolTest.validateLaunch(ToolTest.java:166)
at edu.uoc.elc.lti.tool.ToolTest.assertLaunch(ToolTest.java:160)
at edu.uoc.elc.lti.tool.ToolTest.assertLaunches(ToolTest.java:146)
at edu.uoc.elc.lti.tool.ToolTest.validateInvalidLtiLaunchesMustReturnFalse(ToolTest.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 7.244 sec
Running edu.uoc.elc.lti.tool.deeplinking.SettingsTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec

Results :

Tests in error:
isValidEmpty(edu.uoc.elc.lti.platform.deeplinking.FileItemValidatorTest)

Tests run: 32, Failures: 0, Errors: 1, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 11.119 s
[INFO] Finished at: 2022-04-29T09:09:36-06:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project lti-13: There are test failures.
[ERROR]
[ERROR] Please refer to /Users/douglundin/IdeaProjects/D2L-LTI/UOC/java-lti-1.3/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Dougs-MacBook-Pro:java-lti-1.3 douglundin$

We are using these LTI libraries to get user data from Canvas. When we add our LTI app to a testing canvas environment and try to make the launch to a local, development version of our code the launch works successfully, from within a new window since we are making connections to an insecure resource. When we deploy our code on a test server, and start an LTI Launch to it, within the iframe since it's a secure resource, upon trying to validate the launch, it says it's not valid because Invalid token. We have made sure our POST endpoint is getting the correct id_token, we added our beta canvas install to the allowed CORS list, we made sure it wasn't an encoding issue. The state is also matching the request as well. We are unsure why this is only happening on our test server and not on our local development environment. Any suggestions would be greatly appreciated.

Hi,

Apologies, to barge in like this but I am looking into Java (or Groovy) LTI 1.3 libraries so we can develop a JMeter load test for our LTI tool.

Is that something you may have had to develop here to integration test this library for LTI tools? Or is there a better place/project to look for an answer.

Any pointers will be appreciated.

Thanks in advance,
Jeroen

Thank you for your work, this is very useful! Please publish on Maven Central as this makes it much more easier to use this as dependency in projects.

We are trying to integrate LTI 1.3 with canvas for an upcoming project we are working on. We are running into an issue on step 3, specifically with validating the response. It returns false and the reason is Claim https://purl.imsglobal.org/spec/lti/claim/target_link_uri is invalid. As far as we can tell the target_link_uri is correct. I'm not sure if this is related but when we try to view the target_link_uri, using this code tool.getCustomClaim(ClaimsEnum.TARGET_LINK_URI) we get this error message

at [Source: UNKNOWN; byte offset: #UNKNOWN]] with root cause
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('http://localhost:8083/student-feedback/api/lti/lti-home')
 at [Source: UNKNOWN; byte offset: #UNKNOWN]
	at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63)
	at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1739)
	at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1364)
	at com.fasterxml.jackson.databind.deser.std.StdDeserializer._deserializeFromString(StdDeserializer.java:311)
	at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:454)
	at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:32)
	at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4539)
	at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4475)
	at edu.uoc.lti.jwt.claims.JWSClaimAccessor.get(JWSClaimAccessor.java:123)
	at edu.uoc.elc.lti.tool.Tool.getCustomClaim(Tool.java:179)
	at uiowa.ais.icon.controller.feedback.LTIAuthController.litHome(LTIAuthController.java:123)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:152)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at uiowa.auth.config.filters.OAuthFilter.doFilterInternal(OAuthFilter.java:71)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at uiowa.auth.config.filters.JwtAuthenticationFilter.doFilterInternal(JwtAuthenticationFilter.java:63)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.springframework.security.web.FilterChainProxy.lambda$doFilterInternal$3(FilterChainProxy.java:231)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:365)
	at org.springframework.security.web.access.intercept.AuthorizationFilter.doFilter(AuthorizationFilter.java:100)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:126)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:179)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:107)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:93)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.context.SecurityContextHolderFilter.doFilter(SecurityContextHolderFilter.java:82)
	at org.springframework.security.web.context.SecurityContextHolderFilter.doFilter(SecurityContextHolderFilter.java:69)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:62)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.session.DisableEncodeUrlFilter.doFilterInternal(DisableEncodeUrlFilter.java:42)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:233)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:191)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:352)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:268)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:166)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:894)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:833)

Thanks a lot for sharing this library.

Would you be open to a PR for adding module-info.java to the project and its dependencies (lti-13-core & lti-13-jwt)?

The most important changes would be:

1. Minimum Java version would change from 8 to 9+
2. Some dependencies might need to be upgraded to fix issue #16 (PR #5 shows the fix)

I would be willing to also configure Github actions to help you accept PR like #5 faster and easier.