package com.mozilla.bespin.controllers;import com.mozilla.bespin.UserSession;import com.mozilla.bespin.RequiresLogin;import com.mozilla.bespin.auth.OpenIDAuth;import com.mozilla.bespin.auth.Authenticator;import com.mozilla.bespin.auth.NoPasswordNeededAuth;import java.io.IOException;import org.openid4java.consumer.ConsumerException;import org.openid4java.discovery.Identifier;public class Register extends BespinController {    private Authenticator auth;    public Authenticator getAuthenticator() {        auth = (Authenticator) getCtx().getServletContext().getAttribute("login");        if (auth == null) {            //auth = new OpenIDAuth();            auth = new NoPasswordNeededAuth();            getCtx().getServletContext().setAttribute("login", auth);        }        return auth;    }    private void printUserJSON(String username) {        print("({ 'username':" + username + ", 'project':" + "'secret'})");    }    @RequiresLogin    public void userinfo() {        UserSession session = (UserSession) getCtx().getReq().getSession(true).getAttribute("userSession");        // TODO do the same sha1 has as the python clent        this.printUserJSON(session.username);    }    public void login() throws IOException {        String username = getCtx().parameter(0);        if (username == null) {            getCtx().getResp().sendError(400, "You must provide a username to the \"login\" request");            return;        }        String password = getCtx().parameter(1);        if (password == null) {            password = "";        }        // -- if you are already logged in return        UserSession session = (UserSession) getCtx().getReq().getSession(true).getAttribute("userSession");        if (session != null && session.username.equals(username)) {            this.printUserJSON(session.username);        } else {            String result = getAuthenticator().authenticate(getCtx(), username, password);            if (result != null) {                storeLoggedInUser(result);                this.printUserJSON(session.username);            }        }    }    /**     * Helper to handle the stored logged in user     */    private void storeLoggedInUser(String username) {        UserSession session = new UserSession();        session.username = username;        getCtx().getReq().getSession(true).setAttribute("userSession", session);    }    /*     * The OpenID provider returns to this action     */    public void verify() {        Identifier verified = (Identifier) getAuthenticator().verify(getCtx());        if (verified != null) {            storeLoggedInUser(verified.getIdentifier());            printStatus();        } else {            print("Unable to verify.");        }    }    public void logout() {        getCtx().getReq().getSession(true).removeAttribute("userSession");        print(UserSession.MESSAGE_LOGGED_OUT);    }    public void handler() {        printStatus();    }    private void printStatus() {        UserSession session = (UserSession) getCtx().getReq().getSession(true).getAttribute("userSession");        if (session == null) {            print(UserSession.MESSAGE_NOT_LOGGED_IN);            return;        }        print(String.format(UserSession.MESSAGE_LOGGED_IN, session.username));    }}