[jboss-jira] [JBoss JIRA] (WFLY-4196) HTTP protocol violation

[ https://issues.jboss.org/browse/WFLY-4196?page=com.atlassian.jira.plugin.... ] Nicolas Cazottes commented on WFLY-4196: ---------------------------------------- I did some search in the source code and in debug mode and there is no call to the HttpServletResponse.setHeader or HttpServletResponse.addHeader methods for the Content-Length header. Another point is that the server returns a value for the Content-Length of 3854 bytes where as the real (compressed size is smaller and is of 3760 bytes). So I think that undertow determines the size of the Content-Length before the filter applies and should instead wait the end of the filter to set the value of the Content-Length header. What do you mean by clearing the Content-Length header ? I do not see any API to remove an HTTP Header in HttpServletResponse. For the test of the gzip subsystem configured in undertow, if I activate it via the command /subsystem=undertow/configuration=filter/gzip=gzipfilter/:add, fiddler does not detect any compression on the wire at all. Is it the correct way of activating it ? -- This message was sent by Atlassian JIRA (v6.3.11#6341)