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POGoogle App Engine getCurrentUser() returns null
 

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  1. POGoogle App Engine getCurrentUser() returns null
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    <p>I'm developing an application which requires access to all users in the account. All operations are done on the Google Apps for Bussiness account using administrative account.</p> <p>The general idea is to access my application without any login screens/URLs from the dashboard and retrieve necessary data (users in this case). Is that possible?</p> <p>I don't know if I have to set OAuth (my app is deployed on the appspot and added to the GApps account) - like I said earlier I just want to launch my app and it should get login credentials from currently logged GApps user. </p> <p>However getting current user returns null. This is my servlet with method for getting current user:</p> <pre><code>public class ExperimentalServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { UserService userService = UserServiceFactory.getUserService(); User user = userService.getCurrentUser(); resp.setContentType("text/plain"); resp.getWriter().println("User: " + (user == null ? "&lt;null&gt;" : user.getNickname())); } } </code></pre> <p>appengine-web.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;appengine-web-app xmlns="http://appengine.google.com/ns/1.0"&gt; &lt;application&gt;name-of-my-application&lt;/application&gt; &lt;threadsafe&gt;true&lt;/threadsafe&gt; &lt;version&gt;1&lt;/version&gt; &lt;/appengine-web-app&gt; </code></pre> <p>web.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"&gt; &lt;servlet&gt; &lt;servlet-name&gt;experimental&lt;/servlet-name&gt; &lt;servlet-class&gt;my.app.domain.ExperimentalServlet&lt;/servlet-class&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;experimental&lt;/servlet-name&gt; &lt;url-pattern&gt;/experimental&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;index.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;/web-app&gt; </code></pre>
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