[CXF-8572] Incorrectly parsed ETag when contains 'W/' as part of the content

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.4, 3.3.11
• Fix Version/s: 3.5.0, 3.3.12, 3.4.5
• Component/s: JAX-RS

Environment

Servlet filter in Websphere Liberty 20.0.0.3 with JAX-RS.

• Estimated Complexity: Unknown
• Assignee: Andriy Redko
• Reporter: Ben Cox
• Created: 02/Aug/21 15:23
• Updated: 22/Dec/21 20:41
• Resolved: 04/Aug/21 22:08

Description

We have the following ETag being generated:

wyoBLW/ye71RgN/0LNyj4eA5rfE1ovtlM03aakuGr2Y=

You'll note in characters 6-7, the combination W/ is found.

When we run EntityTag.valueOf(etag) using this Etag, this results in the following error:

java.lang.IllegalArgumentException: Misformatted ETag : "wyoBLW/ye71RgN/0LNyj4eA5rfE1ovtlM03aakuGr2Y="
	at org.apache.cxf.jaxrs.impl.EntityTagHeaderProvider.fromString(EntityTagHeaderProvider.java:57)

The problem in the code seems to be that it accepts W/ as a special combination regardless of position, which doesn't match with the spec as I read it.

Setting this minor because in our case I can change a little bit of documentation and alter the ETag; however, it could be a larger problem for anyone who is dealing with purely computer-generated tags and can't get away from a tag with W/ in it.

Issue Links

• links to: GitHub Pull Request #830