Spring Boot LTI Advantage library

LTI Advantage library for Spring Boot projects. Adds LTI Tool capabilities to your SpringBoot web application

See https://github.com/UOC/java-lti-1.3-provider-example for an example.

Usage

1. Set your maven installation to work with Github packages, following https://help.github.com/en/packages/using-github-packages-with-your-projects-ecosystem/configuring-apache-maven-for-use-with-github-packages#authenticating-to-github-packages

Repository info:

    <repository>
      <id>github-uoc-lti-core</id>
      <name>GitHub UOC Apache Maven Packages</name>
      <url>https://maven.pkg.github.com/uoc/java-lti-1.3-core</url>
    </repository>				
    <repository>
      <id>github-uoc-lti-jwt</id>
      <name>GitHub UOC Apache Maven Packages</name>
      <url>https://maven.pkg.github.com/uoc/java-lti-1.3-jwt</url>
    </repository>				
    <repository>
      <id>github-uoc-lti</id>
      <name>GitHub UOC Apache Maven Packages</name>
      <url>https://maven.pkg.github.com/uoc/java-lti-1.3</url>
    </repository>				
    <repository>
      <id>github-uoc-lti-springboot</id>
      <name>GitHub UOC Apache Maven Packages</name>
      <url>https://maven.pkg.github.com/uoc/spring-boot-lti-advantage</url>
    </repository>				

2. Add the dependency to your pom.xml file:

  <dependency>
	<groupId>edu.uoc.elc.lti</groupId>
	<artifactId>spring-boot-lti-advantage</artifactId>
	<version>0.0.11</version>
  </dependency>

Installation

This library depends on the following additional libraries:

• LTI 1.3 core
• Java-lti-1.3
• LTI 1.3 JWT for testing

Install it using maven:

./mvnw install

About

This library makes essentially two things: Configures SpringBoot Security for validating using the Java-lti-1.3 library and implements some LTI 1.3 core using SpringBoot.

SpringBoot Security (AKA making your webapp a LTI Advantage Tool)

The configuration of the SpringBoot Security framework is made in the edu.uoc.elc.spring.lti.security.LTIApplicationSecurity class. It adds the edu.uoc.elc.spring.lti.security.LTIProcessingFilter as a filter if your application's filter chain, creating the principal and credentials when the launch is a valid LTI 1.3 launch.

It also adds the edu.uoc.elc.spring.lti.security.openid.OIDCFilter for managing OIDC launches.

Utilities

This library contains several utility classes for your application:

• edu.uoc.elc.spring.lti.tool.ToolProvider is the basic class. It provides your application to all the capabilities of the tool.

• edu.uoc.elc.spring.lti.security.User contains information about the current LTI user.

• edu.uoc.elc.spring.lti.security.Context contains information about the current LTI context.

These utility classes can be injected directly in your controllers or methods:

  public ModelAndView init(User user, Context context, ToolProvider toolProvider) {

Locale

The library adds the edu.uoc.elc.spring.lti.security.interceptors.LTILocaleChangeInterceptor interceptor for setting the Locale of the webapp to the Locale of the LTI launch. If you need the locale in your app you can simply add a Locale locale param in your controller method.

Implementations of LTI 1.3 core interfaces

This library contains several implementations of LTI 1.3 core interfaces:

• edu.uoc.elc.spring.lti.security.openid.HttpSessionOIDCLaunchSession for managing OIDC Launch state in the HTTP Session.

• edu.uoc.elc.spring.lti.ags.RestTemplateLineItemServiceClient for Assignment and Grades Service's Line Item service

• edu.uoc.elc.spring.lti.ags.RestTemplateResultServiceClient for Assignment and Grades Service's Results service

• edu.uoc.elc.spring.lti.ags.RestTemplateScoreServiceClient for Assignment and Grades Service's Score publish service

These Assignment and Grades services are accessed through the edu.uoc.elc.spring.lti.tool.ToolProvider bean

Configuration

Configuration of the tool is made in the edu.uoc.elc.spring.lti.tool.ToolDefinitionBean class. Also, remaining LTI Core's interfaces are injected as beans. See the test class edu.uoc.elc.Config for an example

Contributing

Thanks for being interested in this project. The way of contributing is the common for almost all projects:

1. Fork the project to your account
2. Implement your changes
3. Make a pull request

If you need further information contact to xaracil at uoc dot edu