https://bz.apache.org/bugzilla/show_bug.cgi?id=63964
Bug ID: 63964
Summary: Null returned when opening resource URL stream
Product: Tomcat 9
Version: 9.0.29
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
Created attachment 36902
--> https://bz.apache.org/bugzilla/attachment.cgi?id=36902&action=edit
Sample project to reproduce the issue
When opening web app resource's URL for reading, null is returned if the URL
was obtained in a specific way.
See attached sample project:
URL dir = servletContext.getResource("/WEB-INF/dir/");
URL file = new URL(dir, "file");
InputStream in = file.openStream(); // null returned even if the
"/WEB-INF/dir/file" exists.
The issue seems to be in CachedResourceURLStreamHandler, where opening the
URLConnection ignores provided URL:
@Override
protected URLConnection openConnection(URL u) throws IOException {
return new CachedResourceURLConnection(resourceURL, root, webAppPath,
usesClassLoaderResources);
}
The "resourceUrl" points to the parent directory, so null is answered as the
input stream.
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