Github user GodIsDevil commented on the issue:
https://github.com/apache/tomcat/pull/109
In the old version of Tomcat (7.0, 8.0), you used URLConnection to read all
files or directories. I do not quite understand why the high version of Tomcat
can not read the directory through URLConnection (FileInputStream can only read
the file can not read the directory).
`@Override
public InputStream getResourceAsStream(String name) {
if (log.isDebugEnabled())
log.debug("getResourceAsStream(" + name + ")");
checkStateForResourceLoading(name);
InputStream stream = null;
// (0) Check for a cached copy of this resource
stream = findLoadedResource(name);
if (stream != null) {
if (log.isDebugEnabled())
log.debug(" --> Returning stream from cache");
return (stream);
}
boolean delegateFirst = delegate || filter(name, false);
// (1) Delegate to parent if requested
if (delegateFirst) {
if (log.isDebugEnabled())
log.debug(" Delegating to parent classloader " + parent);
stream = parent.getResourceAsStream(name);
if (stream != null) {
// FIXME - cache???
if (log.isDebugEnabled())
log.debug(" --> Returning stream from parent");
return (stream);
}
}
// (2) Search local repositories
if (log.isDebugEnabled())
log.debug(" Searching local repositories");
URL url = findResource(name);
if (url != null) {
// FIXME - cache???
if (log.isDebugEnabled())
log.debug(" --> Returning stream from local");
stream = findLoadedResource(name);
try {
if (hasExternalRepositories && (stream == null))
stream = url.openStream();
} catch (IOException e) {
// Ignore
}
if (stream != null)
return (stream);
}
// (3) Delegate to parent unconditionally
if (!delegateFirst) {
if (log.isDebugEnabled())
log.debug(" Delegating to parent classloader
unconditionally " + parent);
stream = parent.getResourceAsStream(name);
if (stream != null) {
// FIXME - cache???
if (log.isDebugEnabled())
log.debug(" --> Returning stream from parent");
return (stream);
}
}
// (4) Resource was not found
if (log.isDebugEnabled())
log.debug(" --> Resource not found, returning null");
return (null);
}
`
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