Re: Http trailers in chunked requests (Apache Users)

Hi Eric,

Sorry to be bugging you on this one, I grepped through the source and I see some solid references to trailer processing. From the change list, I found that you added support for MergeTrailers in 2.4.11 - any idea on how I could make it work? I just need apache to let the trailers pass through to the upstream haproxy, I am not processing them in mod headers or other apache modules.

Thanks

Sachin

On Wed, Jul 22, 2015 at 4:55 PM, Sachin Shetty <sachin.shetty@xxxxxxxxx> wrote:

Hi,

I tried with Apache 2.4.16 with the "MergeTrailers On". No luck, apache just wont let the trailers pass through. I enabled debug log as well, but no additional info in logs about skipping trailers.

Thanks
Sachin
On Mon, Jul 20, 2015 at 11:44 AM, Sachin Shetty <sachin.shetty@xxxxxxxxx> wrote:
Hi Eric,

We are using mod proxy and mod rewrite to forward the request to an haproxy server running a pool of tomcat. I have verified that when the request is directly sent to haproxy, trailers are sent to the tomcat and it does print it in the debug logs.

While debugging this I have also noticed that apache converts a chunked request < 8KB to a non chunked one and assembled the whole body before sending it down the proxy.

Thanks
Sachin

Sorry could not figure out how to post from a digest, I have copied your question below:

>> What module handles this request, and where are you looking for the trailers?
On Sat, Jul 18, 2015 at 6:27 PM, Sachin Shetty <sachin.shetty@xxxxxxxxx> wrote:
Hi,
as per http spec, we want clients to send us trailers in chunked requests. However the request on the server side does not get the trailer at all.

Is there some setting on apache to allow trailers, we are using apache 2.4.

Our request looks like this.
<<<<<
telnet somehost 80
POST /some-path HTTP/1.1
Authorization: Basic XXXX=
Host: somehost.domain.com
Transfer-Encoding: chunked
Trailer: My-Test-Trailer

50
11111111111111111111111111111111111111111111111111111111111111111111111111111111
0
My-Test-Trailer: some-value-new
>>>>>> 
--
Thanks & Regards
Sachin Shetty

" I never make mistakeas "