How to display (browser) images (inputstream) from the server?

Hi!

 

How can I display images that is being read from a server?!

 

I want to read many images and therfore using dwr.

 

In my ajax-java-method I use:

WebContext ctx = WebContextFactory.get();
HttpServletRequest request = ctx.getHttpServletRequest();
HttpServletResponse response = ctx.getHttpServletResponse();

 

//then gets the outputstream

ServletOutputStream out = response.getOutputStream();

 

//writes my picture (inputstream) to my outputstream

StreamUtils.copyStream(is, out);

 

And on client side I have the following:

document.getElementById('map').style.backgroundImage = MapClass.getMap(<parameters>);

 

No picture is shown and my log says:

2007-02-26 18:02:57,528 ERROR [http-8080-1] org.apache.catalina.core.StandardWrapperValve.invoke() Servlet.service() for servlet myApplication threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
 at org.apache.catalina.connector.Response.getWriter(Response.java:599)
 at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:195)
 at uk.ltd.getahead.dwr.impl.DefaultExecProcessor.handle(DefaultExecProcessor.java:157)
 at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:81)
 at uk.ltd.getahead.dwr.AbstractDWRServlet.doPost(AbstractDWRServlet.java:162)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:174)
 at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
 at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:806)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:736)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
 at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
 at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
 at java.lang.Thread.run(Unknown Source)

 

Does anyone have any idea what to do?!