HttpUrlConnector and JettyConnector doesn't log the headers modified by MultiPartWriter

[chkpnt]

HttpUrlConnector and JettyConnector doesn't log the headers modified by MultiPartWriter

[chkpnt]

Notwithstanding the above, HttpUrlConnector doesn't call HeaderUtils.checkHeaderChanges(...) as other connectors. I haven't checked all others, but at least ApacheConnector, Apache5Connector and JettyConnector are calling the header checker.

[jansupol]

I am not sure the LoggingInterceptor can be modified - it is the chicken-egg issue.

The WriterInterceptor must be invoked before the MessageBodyWriter because it can modify the HttpHeaders. So can the MessageBodyWriter modify the headers and it expects the headers already to be altered by all the Interceptors. So the WritingInterceptor cannot be invoked after the MessageBodyWriter.

As for the header check, the warning is there for the 3rd part connectors so that the modifications to headers, that are not sent to the server are noticed by the users. The ability to send the headers altered by the MBWs is there just recently, For the default HttpUrlConnector, the altered headers were always possible to send and the check was not required.