Restlet 2.2.1 data truncated with JsonpFilter

Question

I am facing an issue, I am trying to return a JsonP representation if the callback parameter is present.

To do so I am using the JsonpFilter built in:

JsonpFilter jsonpFilter = new JsonpFilter(getContext());
authorizer.setNext(jsonpFilter);
jsonpFilter.setNext(router2);

Everything looked fine, until I saw that my data was truncated. Just a few characters are missing, that match the number of character added by the filter (test({status:200,body:{)

Here is the full stack trace:

INFO: 2014-05-19    18:58:08    127.0.0.1   didier.baquier@gmail.com    127.0.0.1   8889    GET /v1/customers/16021 callback=test   200 1962    0   32  http://127.0.0.1:8889   Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.137 Safari/537.36    -
19 mai 2014 18:58:08 org.restlet.engine.adapter.ServerAdapter commit
GRAVE: An exception occured writing the response entity
java.io.IOException: Closed
    at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:602)
    at java.io.FilterOutputStream.write(FilterOutputStream.java:60)
    at java.io.FilterOutputStream.write(FilterOutputStream.java:108)
    at org.restlet.engine.io.IoUtils.copy(IoUtils.java:107)
    at org.restlet.ext.json.JsonpRepresentation.write(JsonpRepresentation.java:149)
    at org.restlet.engine.adapter.ServerCall.writeResponseBody(ServerCall.java:519)
    at org.restlet.engine.adapter.ServerCall.sendResponse(ServerCall.java:463)
    at org.restlet.ext.servlet.internal.ServletCall.sendResponse(ServletCall.java:430)
    at org.restlet.engine.adapter.ServerAdapter.commit(ServerAdapter.java:196)
    at org.restlet.engine.adapter.HttpServerHelper.handle(HttpServerHelper.java:153)
    at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1118)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
2014-05-19 18:58:08.347:WARN::Committed before 500 An exception occured writing the response entity
19 mai 2014 18:58:08 org.restlet.engine.adapter.HttpServerHelper handle
ATTENTION: Error while handling an HTTP server call: 
19 mai 2014 18:58:08 org.restlet.engine.adapter.HttpServerHelper handle
INFO: Error while handling an HTTP server call
java.lang.IllegalStateException: Committed
    at org.mortbay.jetty.Response.resetBuffer(Response.java:1023)
    at org.mortbay.jetty.Response.sendError(Response.java:240)
    at org.restlet.ext.servlet.internal.ServletCall.sendResponse(ServletCall.java:397)
    at org.restlet.engine.adapter.ServerAdapter.commit(ServerAdapter.java:214)
    at org.restlet.engine.adapter.HttpServerHelper.handle(HttpServerHelper.java:153)
    at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1118)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

What am I missing here? I looked at the JsonPRepresentation and the method that returns the size looks good to me.

Thanks in advance for your help.

Answer 1

Wasn't able to figured out the root cause, I ended up rewriting my own filter based on that code https://code.jd.com/zhangdaiscott/jeecg/blob/master/src/jeecg/rest/core/JsonPFilter.java