Antonio Sargento created CXF-5167:
-------------------------------------
Summary: HEAD operation implementation is not compliant with
specification
Key: CXF-5167
URL: https://issues.apache.org/jira/browse/CXF-5167
Project: CXF
Issue Type: Bug
Components: JAX-RS
Affects Versions: 2.7.5
Reporter: Antonio Sargento
The implementation of HEAD operation is not compliant with the HTTP 1.1
specification.
{quote}
9.4 HEAD
The HEAD method is identical to GET except that the server MUST NOT return a
message-body in the response. The metainformation contained in the HTTP headers
in response to a HEAD request SHOULD be identical to the information sent in
response to a GET request. This method can be used for obtaining
metainformation about the entity implied by the request without transferring
the entity-body itself. This method is often used for testing hypertext links
for validity, accessibility, and recent modification.
The response to a HEAD request MAY be cacheable in the sense that the
information contained in the response MAY be used to update a previously cached
entity from that resource. If the new field values indicate that the cached
entity differs from the current entity (as would be indicated by a change in
Content-Length, Content-MD5, ETag or Last-Modified), then the cache MUST treat
the cache entry as stale.
{quote}
Now, since the HEAD response doesn't have an body entity, the Content-lenght is
equal to zero and the mime-type is set to text/plain.
I think that the problem is due the following code in class
org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor (lines 228 - 236)
{code}
// Write the entity
entity = InjectionUtils.getEntity(response.getEntity());
setResponseStatus(message, getActualStatus(response.getStatus(), entity));
if (entity == null) {
responseHeaders.putSingle(HttpHeaders.CONTENT_LENGTH, "0");
responseHeaders.remove(HttpHeaders.CONTENT_TYPE);
message.remove(Message.CONTENT_TYPE);
return;
}
{code}
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