Expose servlet context helpers.

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / servlet / CmsServletContext.java

diff --git a/org.argeo.cms/src/org/argeo/cms/servlet/CmsServletContext.java b/org.argeo.cms/src/org/argeo/cms/servlet/CmsServletContext.java
new file mode 100644 (file)
index 0000000..03a7551
--- /dev/null
+++ b/org.argeo.cms/src/org/argeo/cms/servlet/CmsServletContext.java
@@ -0,0 +1,75 @@
+package org.argeo.cms.servlet;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Map;
+
+import javax.security.auth.login.LoginContext;
+import javax.security.auth.login.LoginException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.api.NodeConstants;
+import org.argeo.cms.auth.HttpRequestCallbackHandler;
+import org.argeo.cms.internal.http.HttpUtils;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.FrameworkUtil;
+import org.osgi.service.http.context.ServletContextHelper;
+
+/**
+ * Default servlet context degrading to anonymous if the the sesison is not
+ * pre-authenticated.
+ */
+public class CmsServletContext extends ServletContextHelper {
+       private final static Log log = LogFactory.getLog(CmsServletContext.class);
+       // use CMS bundle for resources
+       private Bundle bundle = FrameworkUtil.getBundle(getClass());
+
+       public void init(Map<String, String> properties) {
+
+       }
+
+       public void destroy() {
+
+       }
+
+       @Override
+       public boolean handleSecurity(HttpServletRequest request, HttpServletResponse response) throws IOException {
+               if (log.isTraceEnabled())
+                       HttpUtils.logRequestHeaders(log, request);
+               LoginContext lc;
+               try {
+                       lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER, new HttpRequestCallbackHandler(request, response));
+                       lc.login();
+               } catch (LoginException e) {
+                       lc = processUnauthorized(request, response);
+                       if (log.isTraceEnabled())
+                               HttpUtils.logResponseHeaders(log, response);
+                       if (lc == null)
+                               return false;
+               }
+               return true;
+       }
+
+       protected LoginContext processUnauthorized(HttpServletRequest request, HttpServletResponse response) {
+               // anonymous
+               try {
+                       LoginContext lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_ANONYMOUS,
+                                       new HttpRequestCallbackHandler(request, response));
+                       lc.login();
+                       return lc;
+               } catch (LoginException e1) {
+                       if (log.isDebugEnabled())
+                               log.error("Cannot log in as anonymous", e1);
+                       return null;
+               }
+       }
+
+       @Override
+       public URL getResource(String name) {
+               return bundle.getResource(name);
+       }
+
+}