Re: [users@httpd] Re: Http trailers in chunked requests
On Thu, Jul 23, 2015 at 11:03 AM, Sachin Shetty sachin.she...@gmail.com wrote: 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. MergeTrailers on will not put the client's trailers into the ones to be sent to the backend (as you may expect), but instead it merges them into client's headers (obviously after those have already been sent to the backend...). This directive aims to preserve the previous behaviour of httpd (which was wrong, but we wanted anyone broken by the change to be able to recover). The new default is to discard the trailers (or more exactly to put them separately in the request/response trailers table, but nothing is using it for now). I think you should request an enhancement on the bugzilla for mod_proxy (at least) to handle/forward the trailers, that's not the case currently, and I agree this is the sequel. Please note that the trailers shall not be handled/forwarded blindly, the RFC 7230 (sections 4.1.2, 4.3 and 4.4) is quite strict about acceptable trailers and how they ought to be announced in the headers (TE, Trailer, ...), so clients have to conform too. Regards, Yann. - To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
[users@httpd] Re: Http trailers in chunked requests
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.she...@gmail.com 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.she...@gmail.com 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.she...@gmail.com 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 = Host: somehost.domain.com Transfer-Encoding: chunked Trailer: My-Test-Trailer 50 0 My-Test-Trailer: some-value-new -- Thanks Regards Sachin Shetty I never make mistakeas
[users@httpd] Re: Http trailers in chunked requests
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.she...@gmail.com 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.she...@gmail.com 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 = Host: somehost.domain.com Transfer-Encoding: chunked Trailer: My-Test-Trailer 50 0 My-Test-Trailer: some-value-new -- Thanks Regards Sachin Shetty I never make mistakeas
[users@httpd] Re: Http trailers in chunked requests
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.she...@gmail.com 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 = Host: somehost.domain.com Transfer-Encoding: chunked Trailer: My-Test-Trailer 50 0 My-Test-Trailer: some-value-new -- Thanks Regards Sachin Shetty I never make mistakeas
