https://issues.apache.org/bugzilla/show_bug.cgi?id=45906
Summary: Fix ResourceAttributes ETag handling
Product: Tomcat 6
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Created an attachment (id=22642)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22642)
Fix ResourceAttributes ETag handling
The ResourceAttributes class and it's clients have a few problems WRT ETag
handling:
- ResourceAttributes only has a "getetag" attribute (apparently for WebDav?),
and doesn't expose this value through an HTTP header compatible ALTERNATE_ETAG
attribute like it does it's other attributes.
- ResourceAttributes doesn't expose it's ETag through the getIDs(), getAll(),
or get(String) methods, meaning FileDirContext.FileResourceAttributes won't
return the value to DirContextURLConnection clients along with the other
attributes.
- The ResourceAttributes API is confusing, in that setETag(String) sets the
*strong* etag, but getETag() returns the *weak* etag.
- ResourceAttributes.getETag(boolean) is broken in that it sets the 'result'
variable if there is an ETAG attribute value, but then immediately proceeds to
overwrite that result value with the 'strongETag' or 'weakETag' value.
- The only user of ResourceAttributes.getETag(boolean) is
DefaultServlet.getETag(ResourceAttributes), which calls both
ResourceAttributes.getETag() and ResourceAttributes.getETag(boolean) in
succession - this method can be totally removed (making access more consistent
with other attributes) by having just the simpler ResourceAttributes.getETag()
return a strong tag if there is one, else fallback to returning the weak one.
- The DefaultServlet.getETag(ResourceAttributes) method has a redundant and
dead-code path to generate a weak etag using the content length and last
modified values - which will have already been done and returned by
ResourceAttributes.getETag(boolean).
The attached patch against trunk should fix all of this.
FYI: This is a continuation of the DirContextURLConnection problems I fixed in
bug 44611.
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