SAPUI5 - HTTP Session not working

[Former Member]

I'm building a simple SAPUI5 app.

The app requests data from a back-end server, written with Java EE. I use Servlets as endpoint, because I want to maintain a session but it seems not to work.

When I call a servlet after login, the method

request.getSession(false)

in the servlet returns null.

When I test the back-end server with Postman, it works.

I really don't know how to solve.

I'm using SAP Web IDE Personal Edition.

Thanks in advance.

[Former Member · Accepted solution]

I solved by setting cors.support.credentials = true and setting cors.allowed.origins = sapui5_app_address in web.xml file like this

<filter>
        <filter-name>CorsFilter</filter-name>
        <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
        <init-param>
            <param-name>cors.allowed.origins</param-name>
            <param-value>http://localhost:55616</param-value>
        </init-param>
        <init-param>
            <param-name>cors.allowed.methods</param-name>
            <param-value>GET,POST,HEAD,OPTIONS,PUT</param-value>
        </init-param>
        <init-param>
            <param-name>cors.allowed.headers</param-name>
            <param-value>Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>
        </init-param>
        <init-param>
            <param-name>cors.exposed.headers</param-name>
            <param-value>Access-Control-Allow-Origin,Access-Control-Allow-Credentials</param-value>
        </init-param>
        <init-param>
            <param-name>cors.support.credentials</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

and by adding

xhrFields: {
    withCredentials: true
}

to JQuery.ajax() request object.