Integrate various CMS extensions from Argeo Commons.

[gpl/argeo-slc.git] / cms / org.argeo.cms.integration / src / org / argeo / cms / integration / CmsLoginServlet.java

diff --git a/cms/org.argeo.cms.integration/src/org/argeo/cms/integration/CmsLoginServlet.java b/cms/org.argeo.cms.integration/src/org/argeo/cms/integration/CmsLoginServlet.java
new file mode 100644 (file)
index 0000000..5bc1352
--- /dev/null
+++ b/cms/org.argeo.cms.integration/src/org/argeo/cms/integration/CmsLoginServlet.java
@@ -0,0 +1,109 @@
+package org.argeo.cms.integration;
+
+import java.io.IOException;
+import java.util.Locale;
+import java.util.Set;
+
+import javax.security.auth.Subject;
+import javax.security.auth.callback.Callback;
+import javax.security.auth.callback.NameCallback;
+import javax.security.auth.callback.PasswordCallback;
+import javax.security.auth.callback.UnsupportedCallbackException;
+import javax.security.auth.login.LoginContext;
+import javax.security.auth.login.LoginException;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.argeo.api.NodeConstants;
+import org.argeo.cms.auth.CmsSessionId;
+import org.argeo.cms.auth.HttpRequestCallback;
+import org.argeo.cms.auth.HttpRequestCallbackHandler;
+import org.osgi.service.useradmin.Authorization;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/** Externally authenticate an http session. */
+public class CmsLoginServlet extends HttpServlet {
+       public final static String PARAM_USERNAME = "username";
+       public final static String PARAM_PASSWORD = "password";
+
+       private static final long serialVersionUID = 2478080654328751539L;
+       private ObjectMapper objectMapper = new ObjectMapper();
+
+       @Override
+       protected void doGet(HttpServletRequest request, HttpServletResponse response)
+                       throws ServletException, IOException {
+               doPost(request, response);
+       }
+
+       @Override
+       protected void doPost(HttpServletRequest request, HttpServletResponse response)
+                       throws ServletException, IOException {
+               LoginContext lc = null;
+               String username = request.getParameter(PARAM_USERNAME);
+               String password = request.getParameter(PARAM_PASSWORD);
+               try {
+                       lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER, new HttpRequestCallbackHandler(request, response) {
+                               public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
+                                       for (Callback callback : callbacks) {
+                                               if (callback instanceof NameCallback && username != null)
+                                                       ((NameCallback) callback).setName(username);
+                                               else if (callback instanceof PasswordCallback && password != null)
+                                                       ((PasswordCallback) callback).setPassword(password.toCharArray());
+                                               else if (callback instanceof HttpRequestCallback) {
+                                                       ((HttpRequestCallback) callback).setRequest(request);
+                                                       ((HttpRequestCallback) callback).setResponse(response);
+                                               }
+                                       }
+                               }
+                       });
+                       lc.login();
+
+                       Subject subject = lc.getSubject();
+                       CmsSessionId cmsSessionId = extractFrom(subject.getPrivateCredentials(CmsSessionId.class));
+                       if (cmsSessionId == null) {
+                               response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+                               return;
+                       }
+                       Authorization authorization = extractFrom(subject.getPrivateCredentials(Authorization.class));
+                       Locale locale = extractFrom(subject.getPublicCredentials(Locale.class));
+
+                       CmsSessionDescriptor cmsSessionDescriptor = new CmsSessionDescriptor(authorization.getName(),
+                                       cmsSessionId.getUuid().toString(), authorization.getRoles(), authorization.toString(),
+                                       locale != null ? locale.toString() : null);
+
+                       response.setContentType("application/json");
+                       JsonGenerator jg = objectMapper.getFactory().createGenerator(response.getWriter());
+                       jg.writeObject(cmsSessionDescriptor);
+
+                       String redirectTo = redirectTo(request);
+                       if (redirectTo != null)
+                               response.sendRedirect(redirectTo);
+               } catch (LoginException e) {
+                       response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+                       return;
+               }
+       }
+
+       protected <T> T extractFrom(Set<T> creds) {
+               if (creds.size() > 0)
+                       return creds.iterator().next();
+               else
+                       return null;
+       }
+
+       /**
+        * To be overridden in order to return a richer {@link CmsSessionDescriptor} to
+        * be serialized.
+        */
+       protected CmsSessionDescriptor enrichJson(CmsSessionDescriptor cmsSessionDescriptor) {
+               return cmsSessionDescriptor;
+       }
+
+       protected String redirectTo(HttpServletRequest request) {
+               return null;
+       }
+}