I ran into an Error when compile JSP page with taglib using JspC. This
happens with the Jasper in Tomcat 4.1.12. The root of the exception is
thrown by ServletContext.getResource, the exception is
MalformedURLException. After some digging, the following code (in
TagLibraryInfoImpl.java) looks dubious, because it intentionally strips
out the "/" at the beginning of the path, however the Serlvet spec
requires the path to be start with "/". See
http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletContext.html#getResource(java.lang.String)
if(ctxt.getClassLoader() != null &&
URLClassLoader.class.equals(ctxt.getClassLoader().getClass())
&& path.startsWith("/"))
path = path.substring(1,path.length()) ;
So I suggest to change the above lines to the following to guarantee
that path is started with "/":
if(ctxt.getClassLoader() != null &&
URLClassLoader.class.equals(ctxt.getClassLoader().getClass())
&& !path.startsWith("/"))
path = "/" +path ;
One thing that I haven't spent much time on is that why JSP pages with
Taglib compiled OK in Tomcat, I just assume that it might be executing
the different code path. If a regular Jasper developer could examine if
the above change makes sense, I would like submit the change to the code
base. Since I am not a regular developer, I am just posting to the list
for now.
--
Kelly Chen Tumbleweed Communication Corp.
T:650-216-2043 700 Saginaw Drive
F:650-216-2565 Redwood City, CA 94063
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