Get filename of source JSP file (even if included)

Question

I am trying to do some debugging of JSP files that include multiple levels of nested includes.

e.g.

foo.jsp
  <%@ include file="bar.jsp"%>

  bar.jsp
    <%@ include file="baz.jsp"%>

    baz.jsp
      <%@ include file="boz.jsp"%>

To help determine where a certain file is actually included I placed a simple line to output a javascript alert in various files so that I can catch it when a page is rendered.

e.g. (formatted over multiple rows for readability)

<script type="text/javascript">
  alert('Accessing File: <%=this.getName()%>' +
    '\n\nCompiled as: <%=pageContext.getPage().getClass().getName()%>' +
    '\n\nRequested by: <%=request.getRequestURI()%>');
</script>

Thus ideally what I want to see if I inject this into baz.jsp is:

Accessing File: baz.jsp

Compiled as: foo_jsp.java

Requested by: foo.jsp

However since the <%@include%> JSP directive is static - the content is included at translation time, thus everything becomes "foo".

I'd really, really like to not have to edit/hardcode a filename into each debug line I add.

Does anyone have a clever solution to obtain the "true" source filename of a JSP... if it is @included in another file?

Answer 1

<jsp:include> translates to RequestDispatcher.include(..) and is evaluated at request time, rather than statically. So try using it.