https://bz.apache.org/bugzilla/show_bug.cgi?id=69469
Bug ID: 69469
Summary: Servlets can not set certain headers in responses to
HEAD requests
Product: Tomcat 10
Version: 10.1.33
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: pawel.vese...@gmail.com
Target Milestone: ------
Caused by changes for https://bz.apache.org/bugzilla/show_bug.cgi?id=69379.
The change forces certain headers out of the responses:
headers.remove("content-length");
headers.remove("content-range");
headers.remove("trailer");
headers.remove("transfer-encoding");
So, even if a servlet wants to set the "content-length" header (others are
probably never useful for a HEAD response), the set header doesn't show up in
the response.
Note that the FIX notes for 69379 are:
<fix>
<bug>69379</bug>: The default HEAD response no longer includes the
payload HTTP header fields as per section 9.3.2 of RFC 9110. (markt)
</fix>
However, the result of the fix is that even the non-default HEAD response can't
have those headers.
To reproduce, have a servlet class that overrides `doHead()`, and call
response.setHeader("Content-length", String.valueOf(contentLength));
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