I knew there are some issues with using onRequest in your Application.cfc and web services, but I didn't think there were any issues with onRequestStart and ColdFusion 8 SOAP web services.

Today while working on one of my clients web services I started getting the error org.xml.sax.SAXParseException: Premature end of file. on any web service call. The web service worked fine a few days ago.

The problem was that another developer added the following to the existing onRequestStart:

<cfset var headers = GetHttpRequestData().Headers>

Apparently will cause bad things to happen. As a workaround I thought this would be a great use for the function IsSOAPRequest() added to CF7, I've never used it.

Well it turns out that IsSOAPRequest() always returns false in onRequestStart! (On ColdFusion 8, I haven't tested this on 9)

I ended up using arguments.targetPage to condition calling GetHttpRequestData() and all was well.

Here's the full stack trace I was getting:

org.xml.sax.SAXParseException: Premature end of file.
	at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
	at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(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.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at javax.xml.parsers.SAXParser.parse(SAXParser.java:375)
	at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
	at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
	at org.apache.axis.Message.getSOAPEnvelope(Message.java:424)
	at org.apache.axis.server.AxisServer.initSOAPConstants(AxisServer.java:345)
	at org.apache.axis.server.AxisServer.invoke(AxisServer.java:279)
	at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
	at coldfusion.xml.rpc.CFCServlet.doAxisPost(CFCServlet.java:270)
	at coldfusion.filter.AxisFilter.invoke(AxisFilter.java:43)
	at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:273)
	at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48)
	at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
	at coldfusion.filter.PathFilter.invoke(PathFilter.java:86)
	at coldfusion.filter.LicenseFilter.invoke(LicenseFilter.java:27)
	at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70)
	at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
	at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
	at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
	at coldfusion.xml.rpc.CFCServlet.invoke(CFCServlet.java:138)
	at coldfusion.xml.rpc.CFCServlet.doPost(CFCServlet.java:289)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
	at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89)
	at jrun.servlet.FilterChain.doFilter(FilterChain.java:86)
	at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)
	at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
	at jrun.servlet.FilterChain.doFilter(FilterChain.java:94)
	at jrun.servlet.FilterChain.service(FilterChain.java:101)
	at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)
	at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
	at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
	at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
	at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)
	at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
	at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
	at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
	at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)