Module org.eclipse.jetty.servlets
Package org.eclipse.jetty.servlets

Class ConcatServlet

java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
org.eclipse.jetty.servlets.ConcatServlet
All Implemented Interfaces:
Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
@Deprecated public class ConcatServlet extends javax.servlet.http.HttpServlet
Deprecated.

This servlet may be used to concatenate multiple resources into a single response.

It is intended to be used to load multiple javascript or css files, but may be used for any content of the same mime type that can be meaningfully concatenated.

The servlet uses RequestDispatcher.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse) to combine the requested content, so dynamically generated content may be combined (Eg engine.js for DWR).

The servlet uses parameter names of the query string as resource names relative to the context root. So these script tags:

 <script type="text/javascript" src="../js/behaviour.js"></script>
 <script type="text/javascript" src="../js/ajax.js"></script>
 <script type="text/javascript" src="../chat/chat.js"></script>

can be replaced with the single tag (with the ConcatServlet mapped to /concat):

 <script type="text/javascript" src="../concat?/js/behaviour.js&/js/ajax.js&/chat/chat.js"></script>

The ServletContext.getMimeType(String) method is used to determine the mime type of each resource. If the types of all resources do not match, then a 415 UNSUPPORTED_MEDIA_TYPE error is returned.

If the init parameter development is set to true then the servlet will run in development mode and the content will be concatenated on every request.

Otherwise the init time of the servlet is used as the lastModifiedTime of the combined content and If-Modified-Since requests are handled with 304 NOT Modified responses if appropriate. This means that when not in development mode, the servlet must be restarted before changed content will be served.

See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    ConcatServlet()
    Deprecated.
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    Deprecated.
     
    protected long
    getLastModified(javax.servlet.http.HttpServletRequest req)
    Deprecated.
     
    void
    init()
    Deprecated.
     

    Methods inherited from class javax.servlet.http.HttpServlet

    doDelete, doHead, doOptions, doPost, doPut, doTrace, service, service

    Methods inherited from class javax.servlet.GenericServlet

    destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • ConcatServlet

      public ConcatServlet()
      Deprecated.

  • Method Details

    • init

      public void init() throws javax.servlet.ServletException
      Deprecated.
      Overrides:
      init in class javax.servlet.GenericServlet
      Throws:
      javax.servlet.ServletException

    • getLastModified

      protected long getLastModified(javax.servlet.http.HttpServletRequest req)
      Deprecated.
      Overrides:
      getLastModified in class javax.servlet.http.HttpServlet

    • doGet

      protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      Deprecated.
      Overrides:
      doGet in class javax.servlet.http.HttpServlet
      Throws:
      javax.servlet.ServletException
      IOException