Generate cah.config.js via a Servlet. Idea from d4472c1238/src/net/socialgamer/cah/servlets/JavascriptConfig.java

WebContent/WEB-INF/web.xml

@@ -6,26 +6,34 @@
     <welcome-file>index.htm</welcome-file>
     <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>
-  <servlet>
-    <servlet-name>LongPollServlet</servlet-name>
-    <servlet-class>net.socialgamer.cah.servlets.LongPollServlet</servlet-class>
-  </servlet>
   <servlet>
     <servlet-name>AjaxServlet</servlet-name>
     <servlet-class>net.socialgamer.cah.servlets.AjaxServlet</servlet-class>
   </servlet>
+  <servlet>
+    <servlet-name>JavascriptConfig</servlet-name>
+    <servlet-class>net.socialgamer.cah.servlets.JavascriptConfig</servlet-class>
+  </servlet>
+  <servlet>
+    <servlet-name>LongPollServlet</servlet-name>
+    <servlet-class>net.socialgamer.cah.servlets.LongPollServlet</servlet-class>
+  </servlet>
   <servlet>
     <servlet-name>Schema</servlet-name>
     <servlet-class>net.socialgamer.cah.servlets.Schema</servlet-class>
   </servlet>
-  <servlet-mapping>
-    <servlet-name>LongPollServlet</servlet-name>
-    <url-pattern>/LongPollServlet</url-pattern>
-  </servlet-mapping>
   <servlet-mapping>
     <servlet-name>AjaxServlet</servlet-name>
     <url-pattern>/AjaxServlet</url-pattern>
   </servlet-mapping>
+  <servlet-mapping>
+    <servlet-name>JavascriptConfig</servlet-name>
+    <url-pattern>/js/cah.config.js</url-pattern>
+  </servlet-mapping>
+  <servlet-mapping>
+    <servlet-name>LongPollServlet</servlet-name>
+    <url-pattern>/LongPollServlet</url-pattern>
+  </servlet-mapping>
   <servlet-mapping>
     <servlet-name>Schema</servlet-name>
     <url-pattern>/Schema</url-pattern>

WebContent/js/cah.config.js

@@ -1,34 +0,0 @@
-/*
- * Copyright (c) 2012, Andy Janata
- * All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without modification, are permitted
- * provided that the following conditions are met:
- * 
- * * Redistributions of source code must retain the above copyright notice, this list of conditions
- *   and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright notice, this list of
- *   conditions and the following disclaimer in the documentation and/or other materials provided
- *   with the distribution.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * Configuration file.
- * 
- * @author Andy Janata (ajanata@socialgamer.net)
- */
-
-cah.DEBUG = false;
-cah.SILENT_DEBUG = false;
-
-cah.AJAX_URI = "/cah/AjaxServlet";
-cah.LONGPOLL_URI = "/cah/LongPollServlet";

src/net/socialgamer/cah/servlets/JavascriptConfig.java

@@ -0,0 +1,48 @@
+package net.socialgamer.cah.servlets;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+
+public class JavascriptConfig extends HttpServlet {
+
+  private static final long serialVersionUID = 4287566906479434127L;
+
+  private String configString;
+
+  @Override
+  public void init(final ServletConfig config) throws ServletException {
+    final StringBuilder builder = new StringBuilder(256);
+    //TODO: these should be loadable from the web.xml
+    builder.append("cah.DEBUG = false;\n");
+    builder.append("cah.SILENT_DEBUG = false;\n");
+
+    String contextPath = config.getServletContext().getContextPath();
+    if (!contextPath.endsWith("/")) {
+      contextPath += "/";
+    }
+    builder.append(String.format("cah.AJAX_URI = '%sAjaxServlet';\n", contextPath));
+    builder.append(String.format("cah.LONGPOLL_URI = '%sLongPollServlet';\n", contextPath));
+
+    configString = builder.toString();
+
+    super.init(config);
+  }
+
+  @Override
+  protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
+      throws ServletException, IOException {
+
+    resp.setContentType("text/javascript");
+    final PrintWriter out = resp.getWriter();
+    out.println(configString);
+    out.flush();
+    out.close();
+  }
+}