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SAP HANA XS Advanced, Creating an HTML5 Module

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SAP HANA XS Advanced, Creating an HTML5 Module
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SAP HANA XS Advanced, Creating an HTML5 Module

April 8, 2020
Created by
May 11, 2016
Create your first HTML5 module for HTML5 content within your XSA application

You will learn

You will learn how to create an HTML5 endpoint with authentication using the User Account and Authorization (UAA) service.

Prerequisites


Step 1: Add the HTML5 Module in your existing MTA project

What is a Multi-Target Application?: The XS Advanced application platform is based on Cloud Foundry, an open-source platform that provides a layer of abstraction between your application and the underlying infrastructure. This is useful because it allows you to deploy the same application in different cloud providers. Cloud Foundry allows for a micro-service approach. A Multi-Target Application allows you to bundle all the different micro-services conforming your business application into the same lifecycle. For more information about multi-target applications (MTA), refer to this blog post.

Begin by right-clicking on your project and then choosing New -> HTML5 Module

New Module

Name the module web. Press Next to see the confirmation. Then press Finish.

Module web

You will notice a new folder under the project folder. SAP Web IDE has automatically created the appropriate folder structure for you. Open the resources folder to answer the validation below.

What is the name of the file automatically created in the resources folder?
×
Step 2: Add the UAA service as a dependent resource

The User Account and Authentication service validates users and their roles and provides them with an authentication token. You can find more information on the UAA service in the developer guide.

Before you can establish a dependency between your HTML5 module and the UAA service instance, you need to list the UAA service instance as a resource in your applications. Open the mta.yaml file in graphical mode and got to the resources tab. Create a new resource using the + Sign

Add resource UAA

Fill in the name, choose com.sap.xs.uaa-space from the search help.
Add resource UAA

Click Modules to add the dependency to the UAA service in the web module

Add resource UAA

What is this mta.yaml file for?
We have so far created a Multi Target Application, that is, an application that will contain different modules, such as an HTML5 module and some database artifacts within a HANA Database Module. This file is a design-time descriptor, that will be used by the platform to create a deployment descriptor. This file contains information related to the application (ID, version, description) as well as resources, modules and parameters that will be deployed and required at runtime.


And click on Save

Click Save

Open the Code Editor tab in the bottom to see the actual contents of the mta.yaml file.

Code Editor
Log on to answer question
Step 3: Change Authentication Method

The web folder in your project contains the resources that will be served out by this HTML5 module. This HTML5 module manages all HTML/client side UI resources (in the resources folder) and performs the task of reverse proxy for all other internal services, like a application router. This way you have a single HTTP endpoint and avoid any CORS issues. Among other files, the Basic HTML5 Module wizard created a file called xs-app.json.

In this file you can map the routes to destinations you defined in the mta.yaml. We can also set authentication and other options. Go ahead and change the authenticationMethod to route in the xs-app.json file.

{
	"welcomeFile": "index.html",
	"authenticationMethod": "route",
	"routes": [ ]
}

You will learn how to add routes to backend modules in the next tutorials. You can check this post to learn more about how this works.

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Step 4: Build and Run!

Click on the web folder and click on Run as Web Application. This will open a new browser tab to the default page of this web service.

Run your application

The console will be updated with the status of the service. Notice there is a logs URL that will be of use if something goes wrong. Click the URL link in the Run console to open the application in a new browser tab.

Application executing

A new tab will open and you will see the default Hello World button has been placed for you:

Application running
What happens when you click on the button in the new web page?
×

Next Steps

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