On 2015-12-09 15:02, Pechoultres Xavier wrote:
Hi everybody,I wrote an apache (2.2.x) module for special c++ app. It works fine for many years but a problem resist to me. Apache automatically add a content-length header even I send a Transfer-Encoding: chunked I set Transfer-Encoding: chunked in cgi module, I’m sure I do not set a content-length here. I unset Content-length in my module : apr_table_unset(r->headers_out, "Content-Length »); I’ve tried lot of stuff without success, and Apache always add a content-length. This create bug with recent WebCore application. If somebody can give me the light !
I've checked the sources of the apache server. Apache adds some filters to the request processing chain, two of them being ap_content_length_filter and ap_http_header_filter. ap_content_length_filter executes before ap_http_header_filter.
ap_content_length_filter sets the Content-Length header if it can determine the size of the response body. ap_http_header_filter sets r->chunked only if the Content-Length header is not set. The response is chunked and the "Transfer-Encoding: chunked" header is set only if r->chunked = 1.
In short: if apache can determine the size of the response message then you cannot force it to send "Transfer-Encoding: chunked" and it will always set the Content-Length header.
-- Sorin
