Problems trying to send XML over HTTP POST

[Lasse Koskela]

I'm trying to implement a servlet which receives XML messages as HTTP POST requests. The problem is that for some reason I'm not able to call the service correctly -- symptoms being that the servlet and/or helper classes are not able to read the request body.
I'd really appreciate the help.
In Tomcat 4.1.27 I get the following stack trace:

java.io.IOException: Stream closed
        at org.apache.coyote.tomcat4.CoyoteInputStream.read(CoyoteInputStream.java:124)
        at org.apache.xerces.impl.XMLEntityManager$RewindableInputStream.read(Unknown Source)
        at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
        at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
        at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
        at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
        at britney.Utilities.parseXml(Utilities.java:44)
        at britney.adapter.DefaultRequestParser.parse(DefaultRequestParser.java:29)
        at britney.adapter.DefaultAdapter.process(DefaultAdapter.java:44)
        at britney.BritneyServlet.doPost(BritneyServlet.java:142)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
        at java.lang.Thread.run(Thread.java:479)

In iPlanet 6.0 I get the following stack trace:

org.xml.sax.SAXParseException: Document root element is missing.
at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3035)
at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3023)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:500)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:304)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:433)
at org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:179)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:86)
at britney.Utilities.parseXml(Utilities.java:44)
at britney.adapter.DefaultRequestParser.parse(DefaultRequestParser.java:29)
at britney.adapter.DefaultAdapter.process(DefaultAdapter.java:44)
at britney.BritneyServlet.doPost(BritneyServlet.java:142)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.server.http.servlet.NSServletRunner.invokeServletService(NSServletRunner.java:919)
at com.iplanet.server.http.servlet.WebApplication.service(WebApplication.java:1061)
at com.iplanet.server.http.servlet.NSServletRunner.ServiceWebApp(NSServletRunner.java:981)

And this is what Grinder's TCPSniffer tells me (I'm trying to send both with HttpUnit and Commons HttpClient):

--- localhost:44897->localhost:8880 opened --
--- localhost:8880->localhost:44897 opened --
------ localhost:44897->localhost:8880 ------
POST /britney/ivr HTTP/1.1
Content-Type: text/xml; charset=UTF-8
User-Agent: Jakarta Commons-HttpClient/2.0rc2
Host: localhost:8881
Content-Length: 215

------ localhost:44897->localhost:8880 ------
<britney-request version="1">
  <interface>sms</interface>
  <securitycode>12345678901234567890</securitycode>
  <country>FI</country>
  <model>BMA-1</model>
  <source>[phone]</source>
</britney-request>
------ localhost:8880->localhost:44897 ------
HTTP/1.1 200 OK
Server: Netscape-Enterprise/6.0
Date: Mon, 17 Nov 2003 11:36:44 GMT
Content-length: 0
Content-type: text/plain

--- localhost:44902->localhost:8880 opened --
--- localhost:8880->localhost:44902 opened --
------ localhost:44902->localhost:8880 ------
POST /britney/ivr HTTP/1.1
User-Agent: httpunit/1.5
Accept-Encoding: gzip
Content-Type: UTF-8
Host: localhost:8881
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Connection: keep-alive
Content-Length: 215

------ localhost:44902->localhost:8880 ------
<britney-request version="1">
  <interface>sms</interface>
  <securitycode>12345678901234567890</securitycode>
  <country>FI</country>
  <model>BMA-1</model>
  <source>[phone]</source>
</britney-request>
------ localhost:8880->localhost:44902 ------
HTTP/1.1 200 OK
Server: Netscape-Enterprise/6.0
Date: Mon, 17 Nov 2003 11:36:44 GMT
Content-length: 0
Content-type: text/plain

--- localhost:44902->localhost:8880 closed --
--- localhost:44897->localhost:8880 closed --
--- localhost:8880->localhost:44897 closed --
--- localhost:8880->localhost:44902 closed --

[Lasse Koskela]

No longer a problem. It was a sloppy manual refactoring -- the exceptions were due to me trying to parse the content twice...