I would like to implement simple authentication with RESTEasy and JAX-RS so that only user with the correct username and password can access the service. My web app code is something like this:
@GET
@Path("/{param}")
public Response printMessage(@PathParam("param") String msg, @Context HttpHeaders headers) {
    String result = null;
    String username = headers.getRequestHeader("username").get(0);
    String password = headers.getRequestHeader("password").get(0);
    if(username.equals("hello2017") && password.equals("bye")) { 
        result =  "Restful example : " + msg + " from " + headers.getRequestHeader("user-agent").get(0) + " " + headers.getRequestHeader("username").get(0)+ " " + headers.getRequestHeader("password").get(0) + " " + hashString2( headers.getRequestHeader("password").get(0));
        return Response.status(200).entity(result).build();
    }else {
        result="Not Authorized";
        return Response.status(404).entity(result).build();
        //
    }
}
My web.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    <display-name>Location Service</display-name>
    <context-param>
        <param-name>resteasy.resources</param-name>
        <param-value>de.locationservice.LocationService</param-value>
    </context-param>
    <listener>
        <listener-class>
            org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap
        </listener-class>
    </listener>
    <servlet>
        <servlet-name>resteasy-servlet</servlet-name>
        <servlet-class>
            org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher
        </servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>resteasy-servlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>
But I don't think that this is the proper way to do that as I only implement a simple authentication with it. I am trying to follow this but I still don't understand about it as I am new in this topic.
