Allow the generated crossdomain.xml for BOSH to be overridden (OF-340).

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@11581 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/http/FlashCrossDomainServlet.java

@@ -19,31 +19,45 @@
  */
 package org.jivesoftware.openfire.http;
 
-import org.jivesoftware.openfire.XMPPServer;
-import org.jivesoftware.util.JiveGlobals;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
+
+import org.jivesoftware.openfire.XMPPServer;
+import org.jivesoftware.util.JiveGlobals;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
- * Serves up the flash cross domain xml file which allows other domains to access http-binding
- * using flash.
- *
+ * Serves up the flash cross domain xml file which allows other domains to
+ * access http-binding using flash.
+ * 
+ * This implementation will first try to serve
+ * <tt>&lt;OpenfireHome&gt;/conf/crossdomain.xml</tt>. If this file is
+ * unavailable, a crossdomain file will be generated dynamically, based on the
+ * current settings of the Openfire BOSH functionality.
+ * 
  * @author Alexander Wenckus
+ * @author Guus der Kinderen, guus.der.kinderen@gmail.com
  */
 public class FlashCrossDomainServlet extends HttpServlet {
 
-    public static String CROSS_DOMAIN_TEXT = "<?xml version=\"1.0\"?>" +
-            "<!DOCTYPE cross-domain-policy SYSTEM \"http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd\">" +
-            "<cross-domain-policy>" +
-            "<site-control permitted-cross-domain-policies=\"all\"/>" +
-            "<allow-access-from domain=\"*\" to-ports=\"";
+	private static Logger Log = LoggerFactory.getLogger(FlashCrossDomainServlet.class);
+	
+    public static String CROSS_DOMAIN_TEXT = "<?xml version=\"1.0\"?>\n" +
+            "<!DOCTYPE cross-domain-policy SYSTEM \"http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd\">\n" +
+            "<cross-domain-policy>\n" +
+            "\t<site-control permitted-cross-domain-policies=\"all\"/>\n" +
+            "\t<allow-access-from domain=\"*\" to-ports=\"";
 
     public static String CROSS_DOMAIN_MIDDLE_TEXT = "\" secure=\"";
-    public static String CROSS_DOMAIN_END_TEXT = "\"/></cross-domain-policy>";
+    public static String CROSS_DOMAIN_END_TEXT = "\"/>\n</cross-domain-policy>";
     
     private static String CROSS_DOMAIN_SECURE_ENABLED = "httpbind.crossdomain.secure";
     private static boolean CROSS_DOMAIN_SECURE_DEFAULT = true;
@@ -52,18 +66,89 @@ public class FlashCrossDomainServlet extends HttpServlet {
     protected void doGet(HttpServletRequest httpServletRequest,
                          HttpServletResponse response) throws
             ServletException, IOException {
-        StringBuilder builder = new StringBuilder();
+        response.setContentType("text/xml");
+        response.getOutputStream().write(getCrossDomainContent().getBytes());
+    }
+    
+    /**
+	 * Returns the content for <tt>crossdomain.xml</tt>, either by generating
+	 * content, or by passing the provided file in
+	 * <tt>&lt;OpenfireHome&gt;/conf/crossdomain.xml</tt>
+	 * 
+	 * @return content for the <tt>crossdomain.xml</tt> that should be served
+	 *         for this service.
+	 */
+    public static String getCrossDomainContent() {
+    	final String override = getContent(getOverride());
+    	if (override != null && override.trim().length() > 0) {
+    		return override;
+    	} else {
+    		return generateOutput();
+    	}
+    }
+    
+    /**
+	 * Returns <tt>&lt;OpenfireHome&gt;/conf/crossdomain.xml</tt> as a File
+	 * object (even if the file does not exist on the file system).
+	 * 
+	 * @return <tt>&lt;OpenfireHome&gt;/conf/crossdomain.xml</tt>
+	 */
+    private static File getOverride() {
+    	final StringBuilder sb = new StringBuilder();
+    	sb.append(JiveGlobals.getHomeDirectory());
+    	if (!sb.substring(sb.length()-1).startsWith(File.separator)) {
+    		sb.append(File.separator);
+    	}
+    	sb.append("conf");
+    	sb.append(File.separator);
+
+    	return new File(sb.toString(), "crossdomain.xml");
+    }
+    
+    /**
+	 * Return content of the provided file as a String.
+	 * 
+	 * @param file
+	 *            The file from which to get the content.
+	 * @return String-based content of the provided file.
+	 */
+    private static String getContent(File file) {
+		final StringBuilder content = new StringBuilder();
+		if (file.canRead()) {
+			try {
+				final BufferedReader in = new BufferedReader(new FileReader(
+						file));
+				String str;
+				while ((str = in.readLine()) != null) {
+					content.append(str);
+					content.append('\n');
+				}
+				in.close();
+			} catch (IOException ex) {
+				Log.warn("Unexpected exception while trying to read file: " + file.getName(), ex);
+				return null;
+			}
+		}
+
+		return content.toString();
+	}
+    
+    /**
+     * Dynamically generates content for a non-restrictive <tt>crossdomain.xml</tt> file. 
+     */
+    private static String generateOutput() {
+        final StringBuilder builder = new StringBuilder();
         builder.append(CROSS_DOMAIN_TEXT);
         getPortList(builder);
         builder.append(CROSS_DOMAIN_MIDDLE_TEXT);
         getSecure(builder);
         builder.append(CROSS_DOMAIN_END_TEXT);
         builder.append("\n");
-        response.setContentType("text/xml");
-        response.getOutputStream().write(builder.toString().getBytes());
+        
+        return builder.toString();
     }
     
-    private StringBuilder getPortList(StringBuilder builder) {
+    private static StringBuilder getPortList(StringBuilder builder) {
         boolean multiple = false;
         if(XMPPServer.getInstance().getConnectionManager().getClientListenerPort() > 0) {
             builder.append(XMPPServer.getInstance().getConnectionManager().getClientListenerPort());
@@ -97,7 +182,7 @@ public class FlashCrossDomainServlet extends HttpServlet {
         return builder;
     }
     
-    private StringBuilder getSecure(StringBuilder builder) {
+    private static StringBuilder getSecure(StringBuilder builder) {
         if (JiveGlobals.getBooleanProperty(CROSS_DOMAIN_SECURE_ENABLED,CROSS_DOMAIN_SECURE_DEFAULT)) {
             builder.append("true");
         } else {

src/web/http-bind.jsp

@@ -9,9 +9,12 @@
   - agreement with Jive.
 --%>
 <%@ page import="org.jivesoftware.util.ParamUtils" %>
+<%@ page import="java.io.File" %>
 <%@ page import="java.util.Map" %>
 <%@ page import="java.util.HashMap" %>
 <%@ page import="org.jivesoftware.util.Log" %>
+<%@ page import="org.jivesoftware.util.StringUtils" %>
+<%@ page import="org.jivesoftware.openfire.http.FlashCrossDomainServlet" %>
 <%@ page import="org.jivesoftware.openfire.http.HttpBindManager" %>
 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 <%@ taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt" %>
@@ -61,7 +64,8 @@
     int securePort = serverManager.getHttpBindSecurePort();
     boolean isScriptSyntaxEnabled = serverManager.isScriptSyntaxEnabled();
 %>
-<html>
+
+<%@page import="org.jivesoftware.openfire.http.FlashCrossDomainServlet"%><html>
 <head>
     <title>
         <fmt:message key="httpbind.settings.title"/>
@@ -70,10 +74,11 @@
     <script type="text/javascript">
         var enabled = <%=isHttpBindEnabled%>;
         var setEnabled = function() {
-            $("port").disabled = !enabled
+            $("port").disabled = !enabled;
             $("securePort").disabled = !enabled;
-            $("rb03").disabled = !enabled
-            $("rb04").disabled = !enabled
+            $("rb03").disabled = !enabled;
+            $("rb04").disabled = !enabled;
+            $("crossdomain").disabled = !enabled;
         }
         window.onload = setTimeout("setEnabled()", 500);
     </script>
@@ -185,6 +190,14 @@
 		</tbody>
 		</table>
     </div>
+    <div class="jive-contentBoxHeader">Cross-domain policy</div>
+    <div class="jive-contentbox">
+    	<p>By default, Openfire will generate a <tt>crossdomain.xml</tt> file, hosted at the root of the webservice that offers BOSH functionality. This generated file will allow all access on all relevant ports.</p>
+    	<p>This default behavior can be overridden with a custom file. If such a file is made accessible at <tt>&lt;openfireHome&gt;<%=File.separator%>conf<%=File.separator%>crossdomain.xml</tt>, its content will be used, instead of the generated content.</p> 
+    	<p>This is current <tt>crossdomain.xml</tt> content, as it is presented to your users:</p>
+    	<textarea id="crossdomain" cols="120" rows="10" wrap="virtual" readonly="readonly"><%= (isHttpBindEnabled ? StringUtils.escapeForXML(FlashCrossDomainServlet.getCrossDomainContent()) : "") %></textarea>
+    </div>
+    
     <input type="submit" id="settingsUpdate" name="update"
                value="<fmt:message key="global.save_settings" />">
 </form>