MLP DTD files should not be copied to the server bin directory if we can avoid it

[angrygreenfrogs]

This is in reference to https://github.com/RestComm/gmlc/issues/12, where a fix was applied to copy in some missing DTD files that the GMLC was looking for.

The error originally occurred during unmarshalling of the incoming MLP XML request, like this:

16:29:51,912 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1) Error parsing document (line 1, col 40)
16:29:51,913 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1) com.ctc.wstx.exc.WstxParsingException: (was java.io.FileNotFoundException) /home/eross/RestComm/jboss-5.1.0.GA/bin/MLP_SVC_INIT_310.DTD
 at [row,col {unknown-source}]: [1,88]
16:29:51,913 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:630)
16:29:51,914 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:461)
16:29:51,915 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.ValidatingStreamReader.findDtdExtSubset(ValidatingStreamReader.java:475)
16:29:51,916 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.ValidatingStreamReader.finishDTD(ValidatingStreamReader.java:358)
16:29:51,917 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.BasicStreamReader.skipToken(BasicStreamReader.java:3349)
16:29:51,918 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:1988)
16:29:51,919 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1069)
16:29:51,919 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.jibx.runtime.impl.StAXReaderWrapper.next(StAXReaderWrapper.java:293)
16:29:51,919 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.jibx.runtime.impl.UnmarshallingContext.toStart(UnmarshallingContext.java:446)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.jibx.runtime.impl.UnmarshallingContext.unmarshalElement(UnmarshallingContext.java:2750)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.jibx.runtime.impl.UnmarshallingContext.unmarshalDocument(UnmarshallingContext.java:2900)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.gmlc.slee.mlp.MLPRequest.parseRequest(MLPRequest.java:47)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.gmlc.slee.MobileCoreNetworkInterfaceSbb.onPost(MobileCoreNetworkInterfaceSbb.java:375)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
16:29:51,920 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
16:29:51,921 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
16:29:51,921 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at java.lang.reflect.Method.invoke(Method.java:606)
16:29:51,921 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.slee.runtime.sbbentity.SbbEntityImpl.invokeEventHandler(SbbEntityImpl.java:479)
16:29:51,921 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.routeQueuedEvent(EventRoutingTaskImpl.java:379)
16:29:51,922 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.run(EventRoutingTaskImpl.java:126)
16:29:51,923 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at org.mobicents.slee.runtime.eventrouter.EventRouterExecutorImpl$EventRoutingTaskStatsCollector.run(EventRouterExecutorImpl.java:72)
16:29:51,923 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
16:29:51,923 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
16:29:51,924 ERROR [STDERR] (SLEE-EventRouterExecutor-5-thread-1)       at java.lang.Thread.run(Thread.java:745)
16:29:51,924 INFO  [MobileCoreNetworkInterfaceSbb] (SLEE-EventRouterExecutor-5-thread-1) Exception while unmarshalling XML request data: Error parsing document (line 1, col 40)
16:29:51,925 INFO  [MobileCoreNetworkInterfaceSbb] (SLEE-EventRouterExecutor-5-thread-1) Generated response XML: <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE svc_result SYSTEM "MLP_SVC_RESULT_310.DTD">
<svc_result xmlns="MLP_SVC_RESULT_310.dtd" ver="3.1.0">
    <slia ver="3.1.0">
        <result resid="105">FORMAT ERROR</result>
        <add_info>System Failure: Invalid XML received: Error parsing document (line 1, col 40)</add_info>
    </slia>
</svc_result>
16:29:51,932 INFO  [MobileCoreNetworkInterfaceSbb] (SLEE-EventRouterExecutor-5-thread-1) HTTP Request received and response sent.

The fix was to add the missing DTD files and copy them in to the jboss bin directory like this in build.xml

        <echo>Copy MLP DTD files</echo>
        <copy todir="${release.dir}/jboss-5.1.0.GA/bin" failonerror="true">
            <fileset dir="${restcomm.gmlc.dir}/core/bootstrap/src/main/config/dtd">
                    <include name="**" />
            </fileset>
        </copy>

This seems like an inefficient solution, so although it works for right now, we should eventually try to find a better way.

[angrygreenfrogs]

There's a related issue with external DTD files perhaps attempting to be loaded, which we should avoid for security and efficiency reasons.

I've seen mention of a setting like this: unmarshaller.setProperty(javax.xml.XMLConstants.ACCESS_EXTERNAL_DTD, false);