Create a Basic Node.js Application with Express Generator | Tutorials for SAP Developers

Routing refers to determining how an application responds to a client request to a particular endpoint, which is a URI (or path) and a specific HTTP request method (GET, POST, and so on).

Each route can have one or more handler functions, which are executed when the route is matched.

Route definition takes the following structure:

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app.METHOD(PATH, HANDLER)

Where:

• app is an instance of express.
• METHOD is an HTTP request method, in lowercase.
• PATH is a path on the server.
• HANDLER is the function executed when the route is matched.

Add basic logic into the default get endpoint. To make the necessary changes you should navigate to kyma-multitenant-node/routes/index.js and add the logic with the following code snippets:

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/**
 * This is the default end-point when someone attempts to access the SaaS application.
 * We show a message to the logged in user.
 * Format of the message: Hello <logon name>; your tenant subdomain is <consumer sub-domain>; your tenant zone id is <consumer tenant id>
 * The logon name will be specific to each user.
 * The tenant zone and sub domain will be the same for all users of one consumer(tenant).
 * Otherwise, if there is no AuthInfo object found, We show the message "Hello World" to users.
 */
router.get("/", function(req, res, next) {
    try {
        var line1 = "Hello " + req.authInfo.getLogonName();
        var line2 = "your tenant sub-domain is " + req.authInfo.getSubdomain();
        var line3 = "your tenant zone id is " + req.authInfo.getZoneId();
        var responseMsg = line1 + "; " + line2 + "; " + line3;
        res.send(responseMsg);
    } catch (e) {
        console.log("AuthInfo object undefined.");
        var responseMsg = "Hello World!";
        res.send(responseMsg);
    }
});

For more details on how to develop Express web application, please visit the official website: Express